It is an appealing proposition for a nation urgently trying to confront global warming: enlist state-of-the-art machinery to trap and bury harmful greenhouse gas emissions from the most heavily polluting industries, enabling them to otherwise continue business as usual.
Billions of dollars of new subsidies for such carbon capture technology are a signature component of the $370 billion climate package President Biden signed into law last month, with the administration and lawmakers across party lines promising it will help America meet its climate goals.
Yet after years of underwhelming results in carbon capture experimentation, this surge of cash strikes many climate scholars as predominantly a gift to fossil fuel, chemical and industrial agriculture companies seeking a lucrative route to rebrand as "green." The vastly increased tax credit, which lobbyists of every major oil company pursued, will propel a technology that has failed to deliver in several prominent trials.
The incentives are already driving forward large oil and gas projects that threaten a heavy carbon footprint, with companies including ExxonMobil, Sempra and Occidental Petroleum positioned for big payouts.
"We are spending a vast wad of money on this — huge government subsidies — and it often does not work," said Bruce Robertson, an energy finance analyst at the Institute for Energy Economics and Financial Analysis, an energy sustainability think tank. "It keeps coming back because the oil and gas industry is powerful politically. It sets the agenda on climate change."
The boosting of the subsidies by billions of dollars came as lawmakers and the Biden administration confronted a narrow path for meaningful climate action. Energy industry consent was crucial for this summer's passage of the Inflation Reduction Act, championed by one of the industry's staunchest allies, Sen. Joe Manchin III (D-W.Va.). Many climate activists overlooked what they saw as throwing good money after bad for carbon capture to win the massive investments in renewable energy and electric vehicles in the legislation.
Carbon capture generally involves chemical processes that separate out carbon dioxide from industrial gases. Newer, more costly, variations of the technology work like giant vacuums, sucking the carbon dioxide directly from the air. The carbon dioxide is usually then compressed into a liquid and routed to storage, or repurposed for industrial uses.
The irony of carbon capture is that the place it has proven most successful is getting more oil out of the ground. All but one major project built in the United States to date is geared toward fossil fuel companies taking the trapped carbon and injecting it into underground wells to extract crude. A Wyoming project from Exxon was designed for oil extraction but has since been rebranded as a key component of the company's decarbonization strategy, with Exxon boasting it has captured more CO2 than any facility in the world.