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Solar thermochemical conversion of CO 2 into fuels u sing gadolinium sesquioxide: A thermodynamic efficiency analysis
Author(s) -
Bhosale Rahul R.
Publication year - 2021
Publication title -
international journal of energy research
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.808
H-Index - 95
eISSN - 1099-114X
pISSN - 0363-907X
DOI - 10.1002/er.5787
Subject(s) - sesquioxide , gadolinium , chemistry , materials science , organic chemistry
Summary The thermodynamic efficiency analysis of the Gd 2 O 3 /GdO‐based solar‐driven thermochemical CO 2 splitting (Gd‐CS) cycle is conducted. The equilibrium, as well as efficiency analysis, is carried out by obtaining the thermodynamic data from the HSC Chemistry 9.9 software. The equilibrium analysis is performed to identify the temperatures required for partial thermal reduction of Gd 2 O 3 (TR‐Gd). The results obtained indicate that the TR‐Gd from 5% to 100% is feasible in the temperature range of 2237 to 2530 K. The efficiency analysis indicates that the rise in the %TR‐Gd considerably affects the process parameters associated with the Gd‐CS cycle. For example,Q ̇Gd 2 O 3 − red partial − Gd − CSandQ ̇CO 2 − heating − Gd − CSare increased by 1568.5 kW and 47.7 kW due to the rise in %TR‐Gd from 5% to 100%. η solar − to − fuel − Gd − CS is first increased to 5.5% when %TR‐Gd is escalated from 5% to 25% and then decreased to 3.5% with a rise in %TR‐Gd from 25% to 100%. By employing the HR, the η solar − to − fuel − Gd − CS was further enhanced up to 7.2% (maximum value at 60% heat recuperation) at %TR‐Gd equal to 20%.