TY - JOUR
T1 - Numerical simulation of vacuum pressure swing adsorption for biogas upgrading
AU - Zhang, Shi
AU - Chen, Wenliang
AU - Li, Hui
AU - Zhang, Yabing
AU - Wei, Ping
PY - 2013/4
Y1 - 2013/4
N2 - Vacuum pressure swing adsorption(VPSA)is a technology for gas separation. There are some problems when it is applied to the process of biogas purification, among which is the concentration peak at the outlet of the column. To solve this problem, we use the linear driving force(LDF)model and Langmuir isothermal equilibrium to build a model and analyze the effect of CO2 concentration in buffer tank on the purity of outlet of adsorption step. The results indicate that CO2 enters the buffer tank in the second pressure equalization-depressurization and then the column in the first pressure equalization-pressurization, finally the concentration peak appears at the outlet of the column, and affects the CH4 concentration. The simulation shows that in order to control the CO2 concentration in buffer tank and improve the purity of the product, the adsorption time should be shorten as the adsorption pressure decreases.
AB - Vacuum pressure swing adsorption(VPSA)is a technology for gas separation. There are some problems when it is applied to the process of biogas purification, among which is the concentration peak at the outlet of the column. To solve this problem, we use the linear driving force(LDF)model and Langmuir isothermal equilibrium to build a model and analyze the effect of CO2 concentration in buffer tank on the purity of outlet of adsorption step. The results indicate that CO2 enters the buffer tank in the second pressure equalization-depressurization and then the column in the first pressure equalization-pressurization, finally the concentration peak appears at the outlet of the column, and affects the CH4 concentration. The simulation shows that in order to control the CO2 concentration in buffer tank and improve the purity of the product, the adsorption time should be shorten as the adsorption pressure decreases.
KW - Biogas
KW - Linear driving force
KW - Vacuum pressure swing adsorption
UR - http://www.scopus.com/inward/record.url?scp=84876481345&partnerID=8YFLogxK
U2 - 10.3969/j.issn.0438-1157.2013.04.025
DO - 10.3969/j.issn.0438-1157.2013.04.025
M3 - 文章
AN - SCOPUS:84876481345
SN - 0438-1157
VL - 64
SP - 1300
EP - 1305
JO - Huagong Xuebao/CIESC Journal
JF - Huagong Xuebao/CIESC Journal
IS - 4
ER -