CO2 storage in coal can be predicted better

Apr 13, 2007

CO2 storage in the ground is being considered increasingly more often in order to realise the climate and energy objectives. Dutch researcher Saikat Mazumder made it possible to better predict routes of the 'underground highways' along which gasses like carbon dioxide (CO2) and methane (CH4) will move. Moreover, coal was found to be highly suitable for filtering carbon dioxide out of waste gasses and storing it.

The ‘Enhanced Coalbed Methane process’ kills two birds with one stone: carbon dioxide (CO2) is stored in coal seams in the ground and at the same time methane (CH4) is obtained from the process. To optimise this process it is important to know how coal retains and stores some fluids and gasses whilst allowing others through.

The network of cracks is essential for this. Mazumder developed a measuring technique using CT scans that led to an improved understanding of the patterns of cracks. He also did experiments with waste gas and pure CO2 to determine the uptake capacity of single and multi-component gasses. In both wet and dry experiments, CO2 was strongly absorbed and CH4 was released. This methane production in a coal seam can vary over the course of time. Mazumder developed two estimating methods to gain a better understanding of this. When used together these could generate good predictions.

Problems due to swelling

The research revealed that a considerable quantity of CO2 could be removed from waste gas by allowing it to be adsorbed onto coal under high-pressure. According to Mazumder this means that the injection of waste gas into coal seams can be applied to filter out CO2 on an industrial scale and to retain it. Mazumder also carried out a preliminary study into the decrease in porosity and permeability as a consequence of coal swelling due to the injection of CO2. The decrease in the permeability can give rise to serious injection problems in the area of the well into which CO2 is injected.

Source: Netherlands Organization for Scientific Research

Explore further: Tropical Storm Marie forms in Pacific off Mexico

add to favorites email to friend print save as pdf

Related Stories

Oregon sues Oracle over failed health care website

7 hours ago

Oregon Attorney General Ellen Rosenblum says she's filed a lawsuit against Oracle Corp. and several of its executives over the technology company's role in the state's troubled health insurance exchange.

Google buys product design firm Gecko

7 hours ago

Google on Friday confirmed that it bought Gecko Design to bolster its lab devoted to technology-advancing projects such as self-driving cars and Internet-linked Glass eyewear.

Lawsuits challenge US drone, model aircraft rules

8 hours ago

Model aircraft hobbyists, research universities and commercial drone interests filed lawsuits Friday challenging a government directive that they say imposes tough new limits on the use of model aircraft ...

Recommended for you

Volcanic eruption begins under Iceland glacier

1 hour ago

Iceland's Bardarbunga volcano began erupting Saturday under the country's largest glacier after a week of seismic activity rattled the area with thousands of earthquakes, the country's Meteorological Office ...

NASA sees Tropical Storm Karina get a boost

Aug 22, 2014

NASA's TRMM satellite saw Tropical Storm Karina get a boost on August 22 in the form of some moderate rainfall and towering thunderstorms in the center of the storm.

User comments : 0