TY - JOUR
T1 - Selective adsorption of greenhouse gases on the residual carbon in lignite coal liquefaction
AU - Ariunaa, Alyeksandr
AU - Liou, Sofia Ya Hsuan
AU - Tsatsral, Ganbaatar
AU - Purevsuren, Barnasan
AU - Davaajav, Yadamsuren
AU - Chang, Ren Wei
AU - Lin, Chin Jung
N1 - Publisher Copyright:
© 2018 Taiwan Institute of Chemical Engineers
PY - 2018/4
Y1 - 2018/4
N2 - Adsorption of CO2, CH4, and N2 on activated carbon now is considered as a promising approach for greenhouse gas capture and/or separation. The objective of this study was to determine whether the residual carbon in lignite coal liquefaction could be used as an inexpensive and effective replacement for activated carbon. The chemical structure and functional groups transformation of residual carbon were analyzed using Fourier transform infrared (FTIR) and nuclear magnetic resonance (NMR). The adsorption properties of CO2, CH4, and N2 on the residual carbon were investigated at temperatures of 0 °C, 10 °C and 20 °C up to a pressure of 100 kPa. The adsorption kinetics and thermodynamics were also discussed from the uptake curves with the isothermal model. The separation of CO2/CH4, CH4/N2, and CO2/N2 binary mixtures was determined using ideal adsorbed solution theory (IAST) model. At 0 °C and 100 kPa, the simulated selectivities of CO2/CH4, CH4/N2, and CO2/N2 in 50/50 vol.% were 35, 11, and 38, respectively. Significant increased values than have previously been reported in the literature. The residual carbon from solvothermally treated lignite coal could be developed for greenhouse gas capture or biogas purification to achieve fuel grade quality.
AB - Adsorption of CO2, CH4, and N2 on activated carbon now is considered as a promising approach for greenhouse gas capture and/or separation. The objective of this study was to determine whether the residual carbon in lignite coal liquefaction could be used as an inexpensive and effective replacement for activated carbon. The chemical structure and functional groups transformation of residual carbon were analyzed using Fourier transform infrared (FTIR) and nuclear magnetic resonance (NMR). The adsorption properties of CO2, CH4, and N2 on the residual carbon were investigated at temperatures of 0 °C, 10 °C and 20 °C up to a pressure of 100 kPa. The adsorption kinetics and thermodynamics were also discussed from the uptake curves with the isothermal model. The separation of CO2/CH4, CH4/N2, and CO2/N2 binary mixtures was determined using ideal adsorbed solution theory (IAST) model. At 0 °C and 100 kPa, the simulated selectivities of CO2/CH4, CH4/N2, and CO2/N2 in 50/50 vol.% were 35, 11, and 38, respectively. Significant increased values than have previously been reported in the literature. The residual carbon from solvothermally treated lignite coal could be developed for greenhouse gas capture or biogas purification to achieve fuel grade quality.
KW - Greenhouse gas
KW - Selective adsorption
KW - Solvothermal
UR - http://www.scopus.com/inward/record.url?scp=85041900449&partnerID=8YFLogxK
U2 - 10.1016/j.jtice.2018.01.037
DO - 10.1016/j.jtice.2018.01.037
M3 - 期刊論文
AN - SCOPUS:85041900449
SN - 1876-1070
VL - 85
SP - 170
EP - 175
JO - Journal of the Taiwan Institute of Chemical Engineers
JF - Journal of the Taiwan Institute of Chemical Engineers
ER -