By Eric Niiler
The Wall Street Journal, Oct. 28, 2022
Companies are developing technologies to store carbon underground and undersea for decades or longer
Initiatives like Northern Lights aim to lock away industrial emissions of carbon dioxide before they reach the atmosphere. Others use giant fans to suck in outside air and filter out carbon dioxide, a process known as direct air capture. There are also experimental efforts to use the ocean as a massive carbon-dioxide sink by altering its chemistry. The ventures now under way are showing which technologies and geologic formations are most reliable.
“We want the carbon storage to be permanent, but we want to provide confidence to investors, regulators and other stakeholders,” said Dr. Susan Hovorka, senior research scientist at the Gulf Coast Carbon Center at the University of Texas, who has been researching sequestration methods for the past 24 years. “So we want to do surveillance that provides affirmation of the permanence.”
Northern Lights plans to pump carbon dioxide into a layer of sandstone about a mile and a half below the seafloor. There the gas is expected to dissolve in briny water and interact with minerals. After a century, about half of the carbon dioxide pumped into the formation will become part of the rock, according to Dr. Lambton. “The longer the CO2 stays in the reservoir, the safer it becomes,” Dr. Lambton said.
Read the full article at The Wall Street Journal.