Menu

The Cleanest LNG in the World?

LNG Tanker

1. Executive Summary

British Columbia is at a crossroads. After gaining an early advantage on climate change leadership with a suite of policies including a revenue-neutral carbon tax and an aggressive greenhouse gas reduction target, the province has earned a reputation as a low carbon leader. Maintaining this leadership, while also delivering on a recent policy focus of extracting and exporting natural gas resources, will require significant commitments and actions by both government and the natural gas sector.

Over the past year and a half, the Government of British Columbia has signalled that it intends to keep its low carbon leadership position—and the reputational benefits it provides—by repeatedly stating that its proposed new liquefied natural gas (LNG) industry will produce “the cleanest LNG in the world.”

“Clean” is a subjective term that should properly capture a wide range of potential aquatic, marine, air, and biodiversity impacts across the fuel production cycle—such as the ecosystem risks associated with increased groundwater withdrawals and fracking activity to extract shale gas to the smog from the plants that compress the gas into LNG.

While these are important areas for further study, this paper limits its scope to carbon pollution, and specifically government assertions that British Columbia’s industry “will have lower life cycle greenhouse gas emissions than anywhere else.” Until this report, no independent definition has yet attempted to explain what “cleanest LNG in the world” actually means, and what it will take to deliver on it.

This report concludes that without policy leadership, LNG produced in British Columbia would emit more than three times the carbon pollution of that produced in current world-leading operations. The finding is based not only on the emissions of the proposed LNG plants, but on the carbon footprint of the commodity they would produce—from wellhead to waterline.

We conclude that this leadership gap can be closed if the government creates the policy environment that both directs and incentivizes the energy industry to employ a mix of strategies and technologies proven to drive carbon pollution down all the way across the lifecycle of LNG production.

By working with industry to specify a variety of these solutions and pushing the envelope of innovation, British Columbia can make good on its promises and deliver the cleanest LNG in the world. Doing so will reduce impacts on communities, other sectors, and ecosystems, provide a competitive advantage in a global energy marketplace increasingly focused on lower carbon energy, and help reduce the recent erosion of the province’s hard-earned reputation as a climate leader.

[Download .PDF Version of Report.]

2. Background: British Columbia’s Liquefied Natural Gas Ambitions

In 2007 and 2008, the Province of British Columbia landed on the world stage as a climate and clean energy champion when the government introduced a revenue-neutral carbon tax, a ban on coal-fired electricity without carbon capture and storage, and other measures. In 2010, it introduced a Clean Energy Act that mandated the province to source at least 93 percent of its electricity from clean and renewable sources.

The province earned widespread praise for this early leadership, a reputation it is still enjoying to this day. For example, a recent study confirming the carbon tax’s effectiveness in reducing fossil fuel consumption (Elgie, 2013) attracted international media attention, including accolades from The Economist.

A March 2011 leadership change brought a corresponding shift in British Columbia’s policy priorities, and the government began placing a stronger focus on fossil fuel extraction and export. The following year, the province released its Liquefied Natural Gas Strategy. The strategy outlined its intent to access new overseas markets for the province’s extensive natural gas resources, via a series of proposed liquefied natural gas (LNG) facilities and export terminals.

The proposed new industry would extract, process, transport, and chill natural gas to minus 161 degrees Celsius—the point at which it becomes liquid and transportable. The liquefied fuel would then be shipped to Pacific Rim customers aboard specialized tankers.

Assuming industry proponents secure First Nations support, social licence, and the necessary environmental approvals, the Government of British Columbia has set itself a goal of having at least three LNG facilities in operation on the B.C. coast by 2020.

The strategy promises significant short and medium term economic benefits for British Columbia. The government expects these three news plants will drive more than $20 billion in direct investment and yield more than $1 billion a year in public revenue (Ministry of Energy and Mines, 2013) At full build-out, the province anticipates the industry will support as many as 75,000 permanent jobs (Ministry of Energy, Mines, and Natural Gas, 2013). These projections have not been independently verified and may be overstated, but undeniably the industry promises significant new investment and employment.

It is also important to consider and mitigate the costs and risks of development to current and future generations of British Columbians and the province’s well-earned reputation for climate leadership. Even before it is regasified into natural gas overseas and burned, LNG produces significant carbon pollution. When one totals up the carbon pollution associated with all links in the LNG production chain up until shipment, a tonne of LNG manufactured in the “off the shelf” B.C. plant we describe below will generate roughly a tonne of carbon pollution.

Climate disruption is already costing British Columbia citizens and communities real money. Without strengthened leadership and policy reform from all levels of government, their burden will only grow.

According to a 2011 report by the National Round Table on the Environment and Economy, by the middle of this century, climate change could cost British Columbia between $500 million and $3 billion per year, mostly through flooding and lost revenue from forestry. (National Round Table, 2011). Further, new jobs created in the energy sector may well undermine others. As one example, climate disruption is already pushing many of British Columbia’s agricultural producers to the limit of viability. (Pacific Institute for Climate Solutions, 2013).

To be clear, even if natural gas is the cleanest burning of all fossil fuels, and even if LNG is produced with a relatively smaller carbon footprint, LNG remains a fossil fuel. In its recent World Energy Outlook, the International Energy Agency made it clear that if humanity is to escape truly dangerous climate disruption, we must leave two-thirds of all remaining fossil fuels—including gas—in the ground. (International Energy Agency, 2012).

The proposed LNG industry would increase the province’s overall emissions, not reduce them. Under the Greenhouse Gas Reduction Targets Act, the Government of British Columbia is required to reduce carbon pollution 33 percent below 2007 levels by the year 2020. However, recent assessments conclude that the proposed new industry would push this goal out of reach. (Bryant, 2013; Lee, 2012).

Perhaps anticipating these concerns, government has at various points over the past 18 months assured British Columbians that made-in-B.C. LNG industry will be “the cleanest LNG in the world”—that is to say, it will boast the world’s lowest life cycle greenhouse gas emissions. (See “For the Record,” opposite.)

This report represents an effort to define what it will take to deliver on British Columbia’s promise to produce the cleanest available LNG with respect to life cycle greenhouse gas emissions. It outlines where, and under what circumstances, the LNG with the world’s smallest carbon footprint is currently produced. It also outlines various strategies and technologies that British Columbia’s nascent LNG industry would need to adopt if it is to meet or beat the current global best-in-class standard.

It is our hope that this document will inform ongoing public and policy discussions such that any new LNG industry and associated infrastructure will present the smallest possible impact—not only to the climate, British Columbia’s water and world-class ecosystems, and the people who live in them, but also to the province’s hard-fought international reputation for climate leadership.

3. Our Approach

To define what “cleanest LNG” really means, and recommend how British Columbia could achieve it via a hypothetical LNG sector, we commissioned a scan of the global LNG industry, a survey of best practices, and an analysis of the carbon impact of various strategies and technologies using greenhouse gas modelling software.

This paper reviews existing industry data to assess the carbon footprint, from wellhead to ship terminal, of LNG produced at a variety of existing and proposed facilities around the world.

To assess LNG from a carbon perspective, one must consider not simply the liquefaction facility, but the full upstream chain of production, including gas extraction, processing, and transportation (Figure 1). Our assessment includes these stages, but not the carbon pollution released as the fuel is shipped to its final markets and burned there.

 We identify two facilities that today produce the “cleanest” LNG available—again, factoring in all stages of production—a benchmark that British Columbia LNG needs to meet or beat to claim world-leading status. We sketch out what a “standard” British Columbia LNG plant would look like under current policy, and present a range of potential pathways to leadership. We then discuss the challenges of achieving this global leadership and the detailed results of our life cycle analysis. Finally, we offer some suggestions for future research.

For a detailed explanation of our research methodology, please see the Appendix, available in the full download PDF of this document.

4. The Cleanest LNG in the World

The cleanest LNG in the world is currently produced at two separate facilities located a half world apart: Statoil’s Snøhvit project, on the island of Melkøya in the Norwegian Sea, and the Gorgon plant, on Barrow Island off the western coast of Australia. The latter is a joint venture of Australian subsidiaries of Chevron, Royal Dutch Shell, and ExxonMobil.

These two projects boast life cycle greenhouse gas emissions from production, transportation and liquefaction of 0.35 and 0.36 tonnes CO2 equivalent per tonne of LNG, respectively. That is to say, each tonne of LNG produced at Snøhvit and Gorgon releases the equivalent of 0.35 and 0.36 tonnes of greenhouse gas emissions into the atmosphere.

No emissions data exists for a “typical” British Columbia LNG plant, as none is yet built. To inform our analysis, we have used engineering data from a pair of facilities that employ—or will employ—technologies currently being discussed by B.C. LNG proponents. Both are in Australia: Woodside Petroleum’s Pluto plant, located on the Burrup Peninsula of the country’s northwest coast, and the Santos-Petronus GLNG project, presently under construction on Curtis Island, off the coast of Gladstone, in Queensland.

Since British Columbia is clearly not Australia, our analysis accounts for differences in underlying operating conditions, including environmental operating conditions (see  “A Cold Climate Advantage?”). The government of British Columbia has recently identified the province’s cooler northern climate as offering a strategic advantage.

With respect to similarities neither Pluto nor Santos-Petronus will process natural gas on site, nor will they capture and store carbon dioxide emissions. Though it is technically possible, none of the current British Columbia LNG proponents plans to capture their carbon pollution and there currently exists no government requirement for them to do so. The Australian facilities also use contemporary technologies: Pluto began liquefying gas in May 2012, while Santos-Petronus is expected to come online in 2015.

For all of the above reasons, we consider the Pluto and Santos-Petronus operations to be a reasonable approximation of a typical British Columbia LNG plant.

Given this, without additional policy or regulations, a standard British Columbia plant will produce life cycle greenhouse gas emissions equivalent to 0.96 tonne of carbon per tonne of LNG produced. In translation, this means that the atmospheric cost of one tonne of fuel produced in an off-the-shelf British Columbia LNG plant will be roughly one tonne of carbon pollution—almost three times produced in the globally leading facilities in Norway and Australia.

If British Columbia were truly to produce the cleanest LNG in the world with respect to life cycle carbon pollution, government and industry would need to find ways to close the 0.61 tonne emissions gap between the world-leading plants and the standard facilities currently on the table.

This will be challenging, because both the Snøhvit and Gorgon facilities draw directly from undersea natural gas deposits, efficiently produce, process and liquefy that gas in a centralized facility, and incorporate carbon capture and storage. Plant operators capture and sequester underground greenhouse gas emissions that would ordinarily be vented to the atmosphere during processing.

British Columbia LNG producers will be sourcing at least a portion of their gas from unconventional deposits that contain more carbon dioxide. Project proponents would need to pipe the gas across the province, and process and liquefy it at different locations. Without mitigation measures, this will increase the carbon footprint of the final product.

5. Factors Influencing the Carbon Footprint of LNG

As the above examples illustrate, not all LNG facilities are created equal. In British Columbia, industry proponents have a range of technologies and strategies at their disposal—both “upstream” at the source of gas extraction and “downstream” at the LNG plant, and at all points between—that could bring down the life cycle carbon footprint of British Columbia LNG to a world-leading standard.

Broadly speaking, three factors influence the carbon footprint of LNG, from wellhead to waterline.

  • Natural Gas Sourcing and Processing: Due to characteristics of different natural gas fields and how they are extracted, some deposits innately have much lower greenhouse gas emissions than others. For example, raw natural gas sourced from the Horn River basin, near Fort Nelson in the province’s far northeast corner, contains 12 percent carbon dioxide. Meanwhile, the Montney field, in the vicinity of Fort St. John and Dawson Creek, contains just one percent carbon dioxide. Gas sourced from the Montney field will have a smaller carbon footprint than Horn River gas, unless the latter’s significant carbon dioxide content is captured and stored at the wellhead—a process not currently required in British Columbia. Carbon dioxide in natural gas must be separated in a processing plant, and without carbon capture and storage, it is vented to the atmosphere, where it exacerbates climate disruption. Further, at least in British Columbia, the industry presently burns a great deal of natural gas to process natural gas, releasing more carbon pollution. Electrification of processing plants with clean electricity would offset some of these emissions, however this is not currently required.

  • Compression: Liquid Natural Gas plants are essentially enormous refrigerators that work in much the same fashion as a home chiller, but at an industrial scale. The plants run massive power-hungry compressors to cool incoming natural gas to -162 degrees Celsius (Woodside, 2011). Typically, LNG facilities burn natural gas to run these compressors directly—a configuration known in the industry as “direct drive.” However, they can also be run by electricity, in a configuration referred to as electric drive, or E-Drive. Electric drives can be more efficient, and can use lower carbon energy sources such as wind, hydro, and also natural gas, burned in an efficient “combined-cycle” power plant.

  • Power Generation: LNG facilities require electricity to accomplish ancillary tasks other than the compression phase of production. How this electricity is sourced influences the carbon footprint of the plant, and the LNG produced there. Renewable energy sources such as wind and hydro produce almost no carbon pollution. Combined cycle natural gas electricity generation does produce carbon pollution, but is currently the most efficient form of gas-fired generation available.

6. A Recipe for LNG Leadership

View our Recipe for LNG Leadership infographic.

Recipe for the Cleanest LNG In the World” INFOGRAPHIC [.PDF, 474KB]

After exploring various options (see Section 7, below), we conclude that a world-leading British Columbia LNG facility would need to be powered with a combination of grid electricity, new renewables, and combined-cycle natural gas generators. When supplied with lower-carbon gas that is processed with best-in-class equipment, this approach brings the proposed facilities within reach of global leadership.

To ensure British Columbia produces the cleanest LNG in the world, the industry will need to source the cleanest natural gas available, process it with best available technologies, and then compress it with low-emission technologies. (Infographic: “Recipe for the Cleanest LNG in the World”)

UPSTREAM: SOURCE B.C.’s CLEANEST GAS, AND PROCESS IT WELL

1. Use Montney Gas or Carbon Capture and Storage: Government could require LNG proponents to exclusively source their natural gas from the province’s Montney Formation gas field, or mandate carbon capture and storage on any gas sourced from the Horn River basin, which has innately higher greenhouse gas emissions. These strategies could reduce emissions by the equivalent of 0.23 tonnes of carbon dioxide per tonne of LNG produced.

2. Electrify Natural Gas Processing and Plug the Leaks: To reduce greenhouse gas emissions, project developers could use a combination of strategies and tools such as electrification—using electricity instead of natural gas to process natural gas—and low-bleed valves and plunger lifts, which reduce leaks and venting. When combined with emerging technologies these choices could reduce equivalent greenhouse gas emissions by 0.27 tonnes per tonne of LNG produced.

DOWNSTREAM: AT THE LNG PLANT

3. Use Electric Drive Compressors: To achieve best-in-class LNG, B.C. LNG plants must use electric drive compressors that in turn run on a combination of new renewable power, existing British Columbia grid electricity, and efficient combined-cycle natural gas generators. If the industry adopts this blend of compression technologies and power sources, it will reduce emissions by the equivalent of 0.11 tonnes of carbon dioxide per tonne of LNG produced.

Taken together, the above actions will collectively reduce life cycle greenhouse gas emissions of a standard off-the-shelf B.C. plant by 0.61 tonnes of equivalent emissions per tonne of LNG produced. This would result in a world-leading industry offering a product competitive to that offered in Norway and Australia.

To place the scale of the opportunity into perspective, for every standard, off-the shelf LNG project that proceeds, achieving this scale of emission reductions would be equivalent to avoiding the annual carbon pollution of two cities the size of Vancouver.

By requiring industry to adopt the above measures, the Government of British Columbia could head off the release of significant quantities of climate pollution and credibly claim that the proposed industry will produce the cleanest LNG in the world with respect to greenhouse gas emissions.

7. Detailed Discussion of Results

The above discussion is based on a life cycle comparison of seven potential B.C. scenarios, including production, processing, transportation and liquefaction. Detailed methodology, assumptions, and sources are available in the appendix.

Each scenario is progressively less greenhouse gas intensive, from left to right in Figure 2, below. We compare these scenarios with two world leading operations (Gorgon and Snøhvit) and Cheniere Energy’s Sabine Pass LNG project in Western Cameron Parish, Louisiana, which we expect would operate under similar conditions to a hypothetical British Columbia plant. Cheniere Energy sources its natural gas from shale and conventional fields, as British Columbia proponents would also do.

Figure 2: Results summary for life cycle GHG emissions in tonnes CO2eq per tonne natural gas production and processing (dark grey) represent the majority of the emissions in the British Columbia and Sabine scenarios, and are far higher than Gorgon and Snøhvit emissions. Snøhvit and Gorgon both produce natural gas from subsea fields with lower greenhouse gas intensities than shale gas production. Shale gas production and processing emissions are difficult to mitigate. Even with carbon capture and storage (see B.C. CCS and renewable scenario), a British Columbia facility would remain well above best-in-class life cycle greenhouse gas emissions at Snøhvit and Gorgon.

Mitigating these emissions requires a combination of strategies such as electrification and technologies designed to reduce leaks and venting, such as bleed valves and plunger lifts. These could reduce emissions in this link of the life cycle chain (see B.C. Low scenario).

Emissions from the LNG facility (medium grey) account for less of the total but can be dramatically reduced by using electric drive combined with zero-emission electricity generation (the B.C. grid scenario and B.C. Low scenario).

 

8. Further Research

An opportunity exists to identify current best practices with respect to airshed, marine, aquatic, and other non-carbon impacts of LNG development and compare them with current industry proposals. This will help ensure that the proposed British Columbia industry, if developed, will embrace and exceed world-leading ecosystem-protection standards.

With respect to carbon pollution—the scope of this report—the following three research areas would refine this analysis and provide information to better inform a world leading greenhouse gas emission profile for LNG.

  1. Refine natural gas production and transportation emission reduction opportunities: This report estimates carbon reduction potential, but it’s unclear what exact mix of technologies would reduce emissions in the Horn River basin and Montney field. Additional research, in coordination with government and industry, could identify the technologies that would enable B.C. to lead the world in low carbon LNG.
  2. Policies: Government policy will likely be necessary to drive industry adoption of these technologies. A policy analysis that considers environmental effectiveness, cost, and technical feasibility would help identify likely policy options and priorities.
  3. Costs: Costs (including capital and operating, and intangible) should be calculated for different technology options. Energy efficient technologies in the natural gas industry are often not adopted despite short payback periods because the technologies are typically considered “risky,” don’t work in certain applications, or require new learning. These intangible costs should also be estimated because they provide a more realistic estimate of the true cost of adopting new technology.

9. Conclusions

The Government of British Columbia has made it clear that its proposed liquefied natural gas (LNG) industry will market the “cleanest LNG in the world” with “lower life cycle greenhouse gas emissions than anywhere else.” Were the province to fulfil this ambition and achieve this goal, from a carbon perspective it would be a world leader in responsible LNG production. Our analysis suggests that a mixture of available and proven technologies and processes—if deployed from wellhead to the ship terminal—could bring the goal within reach.

While additional research is required to understand the most cost-effective implementation options, we recommend the government put in place the policies and regulations that would require the emerging industry to deliver this desired level of performance. Further research is also required to determine what other benchmarks the industry needs to achieve in other no-less critical areas—such as aquatic, marine, and airshed stewardship—in order to reach its stated goal of producing “cleanest LNG in the world.”

10. Sources

(S&T)2 Consultants Inc. (2011). Shale Gas Update for GHGenius.

Bradbury, J., Obeiter, M., Drauker, L., Wang, W., & Stevens, A. (2013). Clearing the Air: Reducing Upstream Greenhouse Gas Emissions from U.S. Natural Gas Systems (pp. 1–60).

Bryant, T., & Budd, R., David Suzuki Foundation (2013). The Cost of Exporting Liquid Natural Gas (Graphic Report).

Chevron. (2009). Gorgon Gas Development and Jansz Feed Gas Pipeline (pp. 0–58).

Elgie, S. & McClay, S. (2013). Sustainable Prosperity. BC’s Carbon Tax Shift After Five Years, An Environmental (and Economic) Success Story.

International Energy Agency (2012). 2012 World Energy Outlook (p. 25).

Lee, Marc (2012). Canadian Centre for Policy Alternatives. BC’s Legislated Greenhouse Gas Targets vs Natural Gas Development: The Good, The Bad and the Ugly.

Ministry of Energy and Mines. (2013). Liquefied Natural Gas A Strategy for B.C.’s Newest Industry (p. 12). Victoria.

Morgan, J. (2012). Rules of Thumb for Screening LNG Developments. Perth.

Ministry of Energy, Mines, and Natural Gas (2013). Employment Impact Review.

National Round Table on the Environment and the Economy. (2011). Paying the Price: The Economic Impacts of Climate Change for Canada.

Crawford, E. & Beveridge, R. (2013). Pacific Institute for Climate Solutions. Strengthening BC’s Agriculture Sector in the Face of Climate Change.

Sabine Pass LNG. (2011). Environmental Assessment for the Sabine Pass Liquefaction Project.

Santos/Petronas. (2009). Greenhouse Gas Emissions GLNG : Supplementary EIS.

Statoil. (2009). Snøhvit LNG Installation. 2009 Sustainability Report.

Woodside. (2011). Pluto LNG Project Greenhouse Gas Abatement Program.

For The Record

Since February 2012, the Government of British Columbia has been stating that the fuel produced in its proposed liquefied natural gas industry will meet and beat the global gold standard for carbon stewardship. Here’s what leaders have been saying.

“LNG development in British Columbia will have lower life cycle greenhouse gas emissions than anywhere else.” —British Columbia Ministry of Energy and Mines, Liquefied Natural Gas: A Strategy for B.C.’s Newest Industry, February 2012.

“Our plan has always been for the cleanest LNG produced anywhere in the world.” —Hon. Premier Christy Clark, B.C. Local News, December 12, 2012.

“We are continuing our close work with industry and First Nations to build the world’s cleanest LNG industry.” —Hon. Premier Christy Clark, British Columbia’s Liquefied Natural Gas Strategy, One Year Update, February 7, 2013.

“Working with the Minister of Natural Gas Development, ensure that LNG operations in British Columbia are the cleanest in the world.” —Mandate letter to Hon. Minister Mary Polak from Hon. Premier Christy Clark, June 10, 2013.

“Positive discussions are taking place with industry to ensure we have the cleanest LNG industry in the world.” —Hon. Rich Coleman, Terrace Standard, August 21, 2013.

“…we have the cleanest and most environmentally friendly LNG industry in the world.” —Hon. Rich Coleman, Terrace Standard, September 7, 2013.

“…we also want to have the cleanest natural gas that is produced for export anywhere in the world, and some of the companies that we are working with are equally committed to that.” —Hon. Premier Christy Clark, CBC Early Edition, September 10, 2013.

A Cold Climate Advantage?

At a recent energy-industry conference, British Columbia’s deputy minister for natural gas development stated that his province’s cold weather offers LNG producers and customers a significant competitive advantage.

Cool temperatures on B.C.’s north coast would result in a 25 percent energy savings over plants located in warmer-weather regions such as Australia, Qatar or the southern United States, the government said.

While that sounds like an impressive number, the reality is that ambient outside temperatures won’t meaningfully impact government and industry’s effort to bring the LNG sector’s overall carbon footprint down to globally leading levels.

The government did its math using an engineering rule-of-thumb that states that every degree of Celsius temperature reduction results in a 1.7 percent energy efficiency gain (Morgan, 2012). The ambient temperatures at British Columbia’s proposed LNG facilities will be on average 15.5 degrees Celsius cooler than those in Australia and southern United States—resulting in the government’s 25 percent figure.

What does this mean for the industry’s carbon pollution footprint? Using the same potential efficiency gains cited by the province, our analysis finds that British Columbia’s cooler climes will reduce the sector’s greenhouse gas footprint by 0.06 tonnes of equivalent CO2 per tonne of LNG produced—as compared to that produced in warmer regions. This is equivalent to the City of Vancouver’s 2012 carbon emissions, assuming the two most likely proposed LNG projects—LNG Canada and Petronas LNG—move ahead (Macquarie 2012).

While this is helpful, it barely makes a dent in the quest for the “cleanest LNG.” Even after factoring in the cold climate advantage, government and industry will still need to find 0.61 tonnes worth of carbon-pollution savings to credibly claim world-leading status.