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Title: HYBRID SULFUR CYCLE FLOWSHEETS FOR HYDROGEN PRODUCTION USING HIGH-TEMPERATURE GAS-COOLED REACTORS

Abstract

Two hybrid sulfur (HyS) cycle process flowsheets intended for use with high-temperature gas-cooled reactors (HTGRs) are presented. The flowsheets were developed for the Next Generation Nuclear Plant (NGNP) program, and couple a proton exchange membrane (PEM) electrolyzer for the SO2-depolarized electrolysis step with a silicon carbide bayonet reactor for the high-temperature decomposition step. One presumes an HTGR reactor outlet temperature (ROT) of 950 C, the other 750 C. Performance was improved (over earlier flowsheets) by assuming that use of a more acid-tolerant PEM, like acid-doped poly[2,2'-(m-phenylene)-5,5'-bibenzimidazole] (PBI), instead of Nafion{reg_sign}, would allow higher anolyte acid concentrations. Lower ROT was accommodated by adding a direct contact exchange/quench column upstream from the bayonet reactor and dropping the decomposition pressure. Aspen Plus was used to develop material and energy balances. A net thermal efficiency of 44.0% to 47.6%, higher heating value basis is projected for the 950 C case, dropping to 39.9% for the 750 C case.

Authors:
Publication Date:
Research Org.:
SRS
Sponsoring Org.:
USDOE
OSTI Identifier:
1020553
Report Number(s):
SRNL-STI-2011-00413
Journal ID: ISSN 0360-3199; TRN: US201116%%527
DOE Contract Number:  
DE-AC09-08SR22470
Resource Type:
Journal Article
Journal Name:
International Jouyrnal of Hydrogen Energy
Additional Journal Information:
Journal Name: International Jouyrnal of Hydrogen Energy; Journal ID: ISSN 0360-3199
Country of Publication:
United States
Language:
English
Subject:
08 HYDROGEN; ELECTROLYSIS; ENERGY BALANCE; FLOWSHEETS; HEATING; HYDROGEN PRODUCTION; MEMBRANES; PERFORMANCE; PROTONS; SILICON CARBIDES; SULFUR; SULFUR CYCLE; THERMAL EFFICIENCY

Citation Formats

Gorensek, M. HYBRID SULFUR CYCLE FLOWSHEETS FOR HYDROGEN PRODUCTION USING HIGH-TEMPERATURE GAS-COOLED REACTORS. United States: N. p., 2011. Web. doi:10.1016/j.ijhydene.2011.07.033.
Gorensek, M. HYBRID SULFUR CYCLE FLOWSHEETS FOR HYDROGEN PRODUCTION USING HIGH-TEMPERATURE GAS-COOLED REACTORS. United States. doi:10.1016/j.ijhydene.2011.07.033.
Gorensek, M. Wed . "HYBRID SULFUR CYCLE FLOWSHEETS FOR HYDROGEN PRODUCTION USING HIGH-TEMPERATURE GAS-COOLED REACTORS". United States. doi:10.1016/j.ijhydene.2011.07.033. https://www.osti.gov/servlets/purl/1020553.
@article{osti_1020553,
title = {HYBRID SULFUR CYCLE FLOWSHEETS FOR HYDROGEN PRODUCTION USING HIGH-TEMPERATURE GAS-COOLED REACTORS},
author = {Gorensek, M},
abstractNote = {Two hybrid sulfur (HyS) cycle process flowsheets intended for use with high-temperature gas-cooled reactors (HTGRs) are presented. The flowsheets were developed for the Next Generation Nuclear Plant (NGNP) program, and couple a proton exchange membrane (PEM) electrolyzer for the SO2-depolarized electrolysis step with a silicon carbide bayonet reactor for the high-temperature decomposition step. One presumes an HTGR reactor outlet temperature (ROT) of 950 C, the other 750 C. Performance was improved (over earlier flowsheets) by assuming that use of a more acid-tolerant PEM, like acid-doped poly[2,2'-(m-phenylene)-5,5'-bibenzimidazole] (PBI), instead of Nafion{reg_sign}, would allow higher anolyte acid concentrations. Lower ROT was accommodated by adding a direct contact exchange/quench column upstream from the bayonet reactor and dropping the decomposition pressure. Aspen Plus was used to develop material and energy balances. A net thermal efficiency of 44.0% to 47.6%, higher heating value basis is projected for the 950 C case, dropping to 39.9% for the 750 C case.},
doi = {10.1016/j.ijhydene.2011.07.033},
journal = {International Jouyrnal of Hydrogen Energy},
issn = {0360-3199},
number = ,
volume = ,
place = {United States},
year = {2011},
month = {7}
}