SAN FRANCISCO Scientists from the Department of Energy's Pacific Northwest National Laboratory will present a variety of their research at the 2013 American Geophysical Union Fall Meeting, which runs Monday, Dec. 9 through Friday, Dec. 13 at the Moscone Convention Center in San Francisco. Among the noteworthy PNNL research scheduled to be discussed are carbon sequestration in empty shale reservoirs, water needs for future energy production and how soil microbes adjust to climate change. More information is below.
Chemistry informs economics of carbon sequestration at shale gas sites
Shale formations underground mixes of mud, minerals and gas that have sparked a natural gas drilling boom in the United States could also help power plants meet proposed EPA emission regulations by permanently storing carbon dioxide. But while many pollution-emitting power plants are located near shale formations, little is known about the complex chemistry of shales reacting with pumped-in carbon emissions. The issue is complicated by the variety of different clay minerals that make up shales. PNNL scientists are getting to the bottom of these details by conducting laboratory experiments and computer modeling research to determine how carbon dioxide, methane and common power plant byproducts such as sulfur dioxide react with the four clays common in shales. Early results show the clay mineral montmorillonite expands to hold more carbon emissions under certain conditions. Tests also show the clay kaolinite has a sweet spot to absorb emissions with an ideal combination of pressure and carbon dioxide concentrations. PNNL geologist Todd Schaef will present these and other results, including a preliminary cost-benefit analysis of carbon sequestration at the United States' shale gas reservoirs.
MR21B-5: "CO2 Utilization and Storage in Shale Gas Reservoirs," 9-9:15 a.m., Tuesday, Dec. 10, 301 (Moscone South
|Contact: Franny White|
DOE/Pacific Northwest National Laboratory