SIMULASI DIFUSI DAN ADSORPSI MATRIKS PADA PROSES ENHANCED COALBED METHANE

Abstract: Carbon capture and storage (CCS) can be considered as one of climate change mitigation efforts, through capturing and injecting of CO2 in underground formations for reducing CO2 emissions. CO2 injection in coalbed methane (CBM) reservoir has potentially attracted for reducing CO2 emissions and enhancing coalbed methane (ECBM) recovery. Diffusion and sorption are phenomenon of gas in the matrix on CO2 injection in CBM reservoir. The objectives of the research are focused on understanding of diffusion and sorption of gas in the coal matrix with mathematical model and estimating of CO2 storage in coalbed and CH4 recovery. In this research, mathematical model is developed to describe the mechanism in the matrix on ECBM process. Mathematical model, which have been valid, is simulated in various variables, i.e. macroprosity (0,001; 0,005; 0,01), pressure (1 MPa, 3 MPa, and 6 MPa), temperature (305 K, 423 K, and 573 K), and initial fraction of CO2 (0,05; 0,1; 0,3; 0,5). The results of this research show that preferential sequestration of CO2 and preferential recovery of CH4 in the surface of micropore on macroporosity 0,001, pressure 1 MPa, temperature 305 K, and inital fraction CO2 0,5 conditions are 0,9936 and 0,0064.

Keywords: carbon capture and storage (CCS); coalbed methane (CBM); enhanced coalbed methane (ECBM); diffusion; adsorption; CO2 fraction; CH4 fraction

Penulis: Ade Nurisman, Retno Gumilang Dewi1, Ucok WR Siagian

Kode Jurnal: jpkimiadd130115

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