Carbon Capture and Storage: Coming Soon to Ohio?
Co-authored by Tyler Zimpfer, Law Fellow, National Agricultural Law Center
Many in Ohio agriculture are familiar with the terms “carbon sequestration” and “carbon credits.” The terms relate to efforts to reduce carbon in the atmosphere by capturing or “sequestering” the carbon. Ohio farmers have taken advantage of their ability to sequester carbon through practices like conservation tillage and cover crops, thus exchanging carbon sequestration practices or the generation of carbon credits for cash payments.
Now an additional form of carbon sequestration is emerging: Carbon Capture and Storage (“CCS”). CCS is a carbon sequestration technology that industries with large carbon dioxide (CO2) emissions are using to reduce their carbon “footprint.” CCS technology captures CO2 from airborne emissions and injects it into geologic formations beneath the land surface. Because CCS requires land and can reduce the “carbon index” of products like ethanol, the technology has implications for Ohio agriculture.
In this first post on CCS, we’ll lay out the background of CCS and what’s driving interest in it. Future posts will explain legal hurdles for bringing CCS to Ohio, how CCS relates to ethanol and the potential growth of the sustainable aviation fuels market, and how Ohio landowners could be affected by CCS.
What is Carbon Capture and Storage?
CCS is a process that captures carbon dioxide from an emitting source and permanently stores it underground in geologic formations referred to as “pore space.” Though some are hearing of CCS for the first time, CCS technology has existed for decades, as have many studies on its safety, sustainability, and the amount of carbon that can be stored in different formations and regions. The Environmental Protection Agency (“EPA”) finalized a rule regulating geologic sequestration in 2010 pursuant to the agency’s authority under the Safe Drinking Water Act.
CCS involves three separate steps – capture, transport, and storage. CO2 is captured and separated from other gases at industrial facilities or directly from the atmosphere. After captured, the CO2 is then compressed for transportation. The compression forces the CO2 to act like a liquid. CO2 is most commonly transported via pipelines but can also be moved by ship to offshore wells. Once the CO2 arrives at the intended destination, it is injected into rock formations, often a mile or more underground, where it spreads throughout the pore space of the formation in a plume. The CO2 is then permanently stored in the geological formation. CCS technology is also used for “enhanced oil recovery,” because CO2 injection can recover untapped oil reserves in a partially-depleted oil field. When used for enhanced oil recovery and storage, the technology is referred to as “carbon capture utilization and storage” or CCUS. The image below illustrates different types of CCS.
Source: Congressional Budget Office
Regulation of CCS wells
CO2 injection wells are regulated under the federal Safe Drinking Water Act by the EPA through the Underground Injection Control (UIC) Program. The category of wells relevant to CO2 for geological storage is “Class VI” wells. The primary purpose of the Class VI regulations is to protect underground sources of drinking water and prevent leakage, explosions, and contamination. Much attention is currently focused on CCS technology due to a recent Archer Daniels Midland (ADM) suspended the injection of CO2 at a site in Illinois after discovering a potential leak due to corrosion in a monitoring well. While there is no report of water contamination, the EPA found ADM violated federal safe drinking water rules by failing to follow an emergency response plan after detecting the leak.
Why so much interest in CCS?
CCS is expected to be an important strategy of industries that struggle with decarbonization or net-zero greenhouse gas emission goals. CCS can reduce CO2 emissions for hard-to-abate sectors that don’t have other methods for reducing their emissions, such as refineries and cement, steel, and chemical manufacturing
A more recent (and arguably more prominent) factor driving CCS is the current federal tax incentive. The 2022 Inflation Reduction Act (IRA) expanded the tax credit known as “Section 45Q,” first enacted in 2008 and extended in 2018. A company that captures and stores a certain threshold of CO2 every year is eligible for the tax credit. The IRA made several changes to the Section 45Q tax credit to further promote CCS and make it more lucrative and accessible, such as increasing the value of the credit by 70% to $85 per metric ton; lowering the annual capture amount required for eligibility by at least 50% for most facilities; and allowing transferability of the tax credit. With the significant changes in the IRA, researchers expect an increase in CCS projects across the United States.
Can we do CCS in Ohio?
No, not without legislation. Two legal changes are necessary to enable CCS technology in Ohio. (1) Ohio law must define and clarify property rights to the pore space in geological formations beneath land surfaces, and (2) the state must allow the establishment of CCS injection wells in Ohio. We'll explain these two requirements in our next post in this series on CCS.
For more background information on CCS and Section 45Q, see:
- Congressional Research Service, Carbon Capture and Sequestration (CCS) in the United States, https://crsreports.congress.gov/product/pdf/R/R44902
- Congressional Budget Office, Carbon Capture and Storage in the United States, https://www.cbo.gov/publication/59832#_idTextAnchor007
- Ohio Department of Natural Resources, Carbon Capture, Utilization, & Storage, https://ohiodnr.gov/discover-and-learn/safety-conservation/about-odnr/geologic-survey/energy-resources/carbon-capture-utilization-storage
- Congressional Research Service, The Section 45Q Tax Credit for Carbon Sequestration, https://crsreports.congress.gov/product/pdf/IF/IF11455
Tags: carbon capture, CCS, sequestration, 45Q, pore space, carbon injection, carbon storage