Post-combustion carbon capture with a gas separation membrane: Parametric study, capture cost, and exergy analysis

TY - JOUR

T1 - Post-combustion carbon capture with a gas separation membrane

T2 - Parametric study, capture cost, and exergy analysis

AU - Zhang, Xiangping

AU - He, Xuezhong

AU - Gundersen, Truls

PY - 2013/8/15

Y1 - 2013/8/15

N2 - A systematic method that integrates process simulation, capture cost estimation, and exergy analysis is applied to evaluate a gas separation membrane process for post-combustion carbon capture in a coal power plant. The influences of membrane performance and process configuration on the energy consumption, required membrane area, and capture cost have been studied. The results indicate that the energy consumption decreases with the increase of CO2/N2 selectivity, but a larger membrane area is required, while for a high CO2 permeance, the membrane area can be significantly reduced. The carbon capture ratio influences the specific energy consumption as well, which should be a trade off. For a two-stage membrane process, the capture load distribution between the first and second stage affects the separation performance greatly, and the optimal range varies with the other parameters. Under the assumptions in this work, the profiles of capture cost related to membrane parameters show that the optimal CO 2/N2 selectivity is 70-90. The exergy analysis indicates that the main energy bottleneck of a membrane technology is located in the membrane unit operation, which has relatively low exergy efficiency. On the other hand, CO2 compression has less potential for energy savings because it has already had very high exergy efficiency.

AB - A systematic method that integrates process simulation, capture cost estimation, and exergy analysis is applied to evaluate a gas separation membrane process for post-combustion carbon capture in a coal power plant. The influences of membrane performance and process configuration on the energy consumption, required membrane area, and capture cost have been studied. The results indicate that the energy consumption decreases with the increase of CO2/N2 selectivity, but a larger membrane area is required, while for a high CO2 permeance, the membrane area can be significantly reduced. The carbon capture ratio influences the specific energy consumption as well, which should be a trade off. For a two-stage membrane process, the capture load distribution between the first and second stage affects the separation performance greatly, and the optimal range varies with the other parameters. Under the assumptions in this work, the profiles of capture cost related to membrane parameters show that the optimal CO 2/N2 selectivity is 70-90. The exergy analysis indicates that the main energy bottleneck of a membrane technology is located in the membrane unit operation, which has relatively low exergy efficiency. On the other hand, CO2 compression has less potential for energy savings because it has already had very high exergy efficiency.

UR - http://www.scopus.com/inward/record.url?scp=84882416283&partnerID=8YFLogxK

U2 - 10.1021/ef3021798

DO - 10.1021/ef3021798

M3 - 文章

AN - SCOPUS:84882416283

SN - 0887-0624

VL - 27

SP - 4137

EP - 4149

JO - Energy and Fuels

JF - Energy and Fuels

IS - 8

ER -