TY - JOUR
T1 - Methanol synthesis from renewable H2 and captured CO2 from S-Graz cycle – Energy, exergy, exergoeconomic and exergoenvironmental (4E) analysis
AU - Nami, Hossein
AU - Ranjbar, Faramarz
AU - Yari, Mortaza
PY - 2019/10/8
Y1 - 2019/10/8
N2 - Thermodynamic, economic and environmental analyses of a combined CO2 capturing system, including, geothermal driven dual fluid organic Rankine cycle (ORC), proton exchange membrane electrolyzer (PEME), S-Graz cycle and methanol synthesis unit (MSU) were carried out. The presented zero emission system was designed based on the oxy-fuel combustion carbon capturing to produce power, hydrogen and methanol, while released CO2 can be captured. Generated renewable power by the ORC was utilized by the PEME to produce renewable hydrogen. Part of the produced hydrogen is fed to the MSU, while the rest was stored in hydrogen tanks. In fact, CO2 hydrogenation to produce methanol suggested via direct methanol synthesis in order to utilize the captured CO2 from the S-Graz cycle. Exergy efficiency of the system defined to analyze the system thermodynamically, while SPECO method utilized to evaluate system economically. Results revealed that the most important part of the system is the S-Graz cycle, from the viewpoint of capital investment. Also, the average product unit cost of 24.88 $/GJ obtained for the whole system.
AB - Thermodynamic, economic and environmental analyses of a combined CO2 capturing system, including, geothermal driven dual fluid organic Rankine cycle (ORC), proton exchange membrane electrolyzer (PEME), S-Graz cycle and methanol synthesis unit (MSU) were carried out. The presented zero emission system was designed based on the oxy-fuel combustion carbon capturing to produce power, hydrogen and methanol, while released CO2 can be captured. Generated renewable power by the ORC was utilized by the PEME to produce renewable hydrogen. Part of the produced hydrogen is fed to the MSU, while the rest was stored in hydrogen tanks. In fact, CO2 hydrogenation to produce methanol suggested via direct methanol synthesis in order to utilize the captured CO2 from the S-Graz cycle. Exergy efficiency of the system defined to analyze the system thermodynamically, while SPECO method utilized to evaluate system economically. Results revealed that the most important part of the system is the S-Graz cycle, from the viewpoint of capital investment. Also, the average product unit cost of 24.88 $/GJ obtained for the whole system.
KW - Carbon capturing
KW - CO2 hydrogenation
KW - Methanol production
KW - Exergoeconomic
KW - Zero emission
KW - Renewable hydrogen
UR - http://www.scopus.com/inward/record.url?scp=85071715977&partnerID=8YFLogxK
U2 - 10.1016/j.ijhydene.2019.08.079
DO - 10.1016/j.ijhydene.2019.08.079
M3 - Journal article
SN - 0360-3199
VL - 44
SP - 26128
EP - 26147
JO - International Journal of Hydrogen Energy
JF - International Journal of Hydrogen Energy
IS - 48
ER -