In the context of mitigating the impending global warming due to anthropogenic carbon dioxide, which of the following can be the potential sites for carbon sequestration ?
- 1. Abandoned and uneconomic coal seams
- 2. Depleted oil and gas reservoirs
- 3. Subterranean deep saline formations
Select the correct answer using the code given below
1 and 2 only
3 only
1 and 3 only
1, 2 and 3
Answer is Wrong!
Answer is Right!
This question was previously asked in
UPSC IAS – 2017
Statement 1 is correct. Abandoned and uneconomic coal seams have pore spaces within the coal matrix where CO2 can be stored. Injecting CO2 can displace adsorbed methane, potentially offering enhanced coal bed methane recovery while sequestering CO2.
Statement 2 is correct. Depleted oil and gas reservoirs are geological formations that previously held hydrocarbons for millions of years, indicating they are well-sealed and suitable for trapping fluids. They are prime candidates for CO2 injection for storage, often combined with Enhanced Oil Recovery (EOR) or Enhanced Gas Recovery (EGR) techniques.
Statement 3 is correct. Subterranean deep saline formations are porous rock layers saturated with highly saline water. These formations are vast and globally abundant, offering the largest potential storage capacity for CO2 compared to coal seams or depleted reservoirs. The CO2 dissolves in the saline water or is trapped in pore spaces.
– Abandoned coal seams, depleted oil/gas reservoirs, and deep saline formations are recognized potential sites.