TY - JOUR
T1 - Solar CO2 splitting coupling with PV, photon-enhanced thermionic emission cell and SOEC for efficient full-spectrum utilization in a wide temperature range
AU - Wang, Hongsheng
AU - Liu, Tong
AU - Kong, Hui
N1 - Publisher Copyright:
© 2024, Scanditale AB. All rights reserved.
PY - 2023
Y1 - 2023
N2 - CO2 splitting driven by solar energy is a clean and promising approach for addressing the issue of CO2 emission and approaching the dual-carbon target. Here, a high-efficient solar CO2 electrolysis system containing photovoltaic (PV) cell, photon-enhanced thermionic emission cell (PETE), and solid oxide electrolysis cell (SOEC) is proposed. CO2 serves as cool fluid to decrease the temperature of PV cells for the enhancement of PV efficiency, and the heated CO2 by PV cells and PETE is fed into SOEC at a high temperature to decrease the Gibbs free energy utilized in electrolysis. The combination of PV cell and PETE can enlarge the temperature range for full solar spectrum utilization. Compared to H2O splitting in SOEC, CO2 splitting can convert more thermal energy with relatively low energy level into high-energy-level chemical energy. The system can reach the energy efficiency, exergy efficiency, and solar-to-fuel efficiency of 73.5%, 48.0%, and 33.3%, respectively. This research sheds light on high-efficient solar CO2 splitting system design with full solar spectrum utilization in a wide temperature range.
AB - CO2 splitting driven by solar energy is a clean and promising approach for addressing the issue of CO2 emission and approaching the dual-carbon target. Here, a high-efficient solar CO2 electrolysis system containing photovoltaic (PV) cell, photon-enhanced thermionic emission cell (PETE), and solid oxide electrolysis cell (SOEC) is proposed. CO2 serves as cool fluid to decrease the temperature of PV cells for the enhancement of PV efficiency, and the heated CO2 by PV cells and PETE is fed into SOEC at a high temperature to decrease the Gibbs free energy utilized in electrolysis. The combination of PV cell and PETE can enlarge the temperature range for full solar spectrum utilization. Compared to H2O splitting in SOEC, CO2 splitting can convert more thermal energy with relatively low energy level into high-energy-level chemical energy. The system can reach the energy efficiency, exergy efficiency, and solar-to-fuel efficiency of 73.5%, 48.0%, and 33.3%, respectively. This research sheds light on high-efficient solar CO2 splitting system design with full solar spectrum utilization in a wide temperature range.
KW - Gibbs free energy
KW - full solar spectrum utilization
KW - photon-enhanced thermionic emission cell (PETE)
KW - photovoltaic/thermal (PVT) collector
KW - solar CO splitting
KW - solid oxide electrolysis cell (SOEC)
UR - http://www.scopus.com/inward/record.url?scp=85190714744&partnerID=8YFLogxK
U2 - 10.46855/energy-proceedings-10727
DO - 10.46855/energy-proceedings-10727
M3 - Conference article
AN - SCOPUS:85190714744
SN - 2004-2965
VL - 36
JO - Energy Proceedings
JF - Energy Proceedings
T2 - 9th Applied Energy Symposium: Low Carbon Cities and Urban Energy Systems, CUE 2023
Y2 - 2 September 2023 through 7 September 2023
ER -
