Hybrid sulfur cycle for H_2 production: A sensitivity study of the electrolysis step in a filter-press cell

摘要

The sensitivity of a depolarized SO_2 electrolyzer to various operating parameters has beenrninvestigated through numerical modeling. A simplified kinetic expression was first derivedrnto relate the anodic overpotential to both temperature and sulfuric acid concentration. Thisrnmodel allows the cell voltage variation with these two parameters to be studied.rnThe effect of the two-phase parameters associated with hydrogen bubble production wasrnthen investigated. Parameters such as electrolyzer orientation, forced convection flow andrnbubble size were considered.rnFinally, an overall SO_2 balance equation was derived to estimate the sensitivity of SO_2rncrossover to the operating conditions.