45Q creates tax credits for carbon capture. Who benefits?

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If you build a carbon capture facility, 45Q will come…in handy. Photo: Kimmy Williams

By Matt Lucas

This is part two of a two-part series on the legislative landscape of carbontech, a class of products and services that convert waste carbon into a variety of products using processes that create fewer emissions than standard alternatives. Originally published May 16, 2018.

“So now what?” That’s the question being asked in corporate offices after the unexpected passage of the reformed “45Q” tax credit in February of 2018. Given the right circumstances, 45Q has the potential to bring carbon capture projects across the U.S. into profitability. But there are still a number of hurdles to clear before carbon capture can become an economical addition to American industries.

Currently, a number of industrial processes produce “streams” of CO₂ at various concentrations, but they don’t stand to benefit equally from 45Q. The cost to capture this CO₂ differs from project to project, depending on their technical characteristics. Here I’ll break down my predictions for which projects are likely to benefit from the new incentive and why.

(For a look at the background and legislative details of 45Q, check out the previous post in the series.)

Industrial capture will come first

The facilities where costs to implement carbon capture are lowest will have the easiest time becoming profitable. A low-hanging fruit is ethanol, an alcohol made by fermenting corn or other biomass. The fermentation process produces a near-pure stream of CO₂ by-product, and at a steady rate: for every molecule of ethanol, the plant yields a molecule of CO₂. The capacity factor of this process (or fraction of the time that the plant is running) is also high, meaning the CO₂ is likely available around-the-clock and the equipment runs for more hours during the year.

Compare this to a fossil power plant, where capacity factors are less than 60% and the capital cost for carbon capture goes up. Current facilities, like Petra Nova, get around this challenge by capturing on only the portion of their capacity running continuously. The catch? Only a fraction of their emissions get captured.

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Operated by food processing company Archer Daniels Midland, this ethanol plant in Decatur, Illinois is one prominent example of BECCS, a process that captures emissions from bioenergy facilities and buries them underground. Photo: Archer Daniels Midland

But it doesn’t stop at ethanol. Natural gas purification, ammonia synthesis, coal- and gas-to-liquids, ethylene oxide — all of these industrial processes are already producing CO₂ by-product at concentrations and capacity factors that make them ideal for least-cost carbon capture sources. And as smaller point sources, the capital and technical risk required to add or improve capture technology is lower than that of larger facilities.

Enhanced oil recovery will drive demand

It may seem ironic that the oil industry, one of the world’s largest emitters of greenhouse gases, could also be the key to accelerating carbon capture, a technology fundamentally motivated by the need for rapid decarbonization in response to climate change.

Ironic, but true.

The U.S. is the world leader in enhanced oil recovery, also known as EOR. The practice involves injecting steam or supercritical CO₂ into a depleted oil field in order to extract additional hydrocarbons. In fact, most of the CO₂ skimmed from gas streams in the U.S. currently goes to EOR. This puts the industry and the country in a unique position to produce a systemic shift in how we manage carbon emissions. 45Q can help.

With more CO₂ (in the right location and at the right price), new oil fields can be enhanced. But the natural geologic reservoirs responsible for supplying the industry are themselves beginning to deplete. For the operators whose EOR projects are meant to run for decades, this natural decline poses a serious challenge.

Under 45Q, selling to EOR is more profitable than saline sequestration. The latter pays $50 per ton in tax credits. EOR gets $35 in credits plus the delivered cost of the CO₂, which, depending on the price of oil, could be anywhere between $15–30 a ton. The deal is further sealed when you consider the preference for cash over tax credits and the regulatory difficulties of acquiring permits for saline sequestration wells.

That isn’t to say that, if you’re a CO₂ provider, EOR is a preferred customer. In fact, EOR makes for an awkward ally to small emitters like ethanol facilities: the politics of oil versus ethanol make for awkward pillow talk, especially when an oil company’s trade association is trying to put their ethanol partner out of business by changing the federal Renewable Fuel Standard.

Even more obstructive to that partnership is the mismatch in scale. An EOR project big enough to justify an interstate pipeline might use one billion standard cubic feet per day (equivalent to ~19 million tons per year), a significant fraction of the ethanol industry’s CO₂ emissions. Making it work would require linking up dozens of facilities in a transaction with many counterparties.

Carbontech will partner with Big Oil to claim 45Q

Another challenge to carbontech claiming 45Q is scale — or, specifically, the lack of it. 45Q stipulates minimum amounts of carbon that must be captured from a facility each year to qualify for the credit. These annual minimums guard against large facilities capturing insignificant slipstreams of their emissions and claiming they’ve decarbonized. In this way, 45Q tries to avert the “greenwashing” feared by environmental groups.

The problem, however, is that the annual minimums are prohibitively large for the nascent carbontech industry. Direct air capture facilities need to capture 100,000 tons per year, which is 100 times more than the largest direct air capture facility, Climeworks’ Hinwil facility in Switzerland, captures today. While 45Q gives a nod to non-EOR carbontech by setting its minimum project size at the lowest level of any project — 25,000 metric tons per year of CO₂ utilized — that’s still an ambitious figure for technologies still in their infancy.

The solution is partnerships. Rather than have dedicated capture projects for carbontech, it makes more sense to partner with a carbon capture project, such as one supplying EOR, and use a slipstream of the CO₂ for carbontech. While it may seem odd that a low-carbon industry like carbontech would partner with Big Oil, 45Q has created a unique and exciting opportunity where these seemingly unlikely partnerships can grow.

Read the previous post in our carbontech series here.

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