Development of a hydrogen permselective membrane reactorusing a silica membrane for the IS process

摘要

The IS (Iodine-Sulfur) process is one of the thermochemical water splitting methodsusing iodine and sulfur as recycling agents. HI decomposition procedure to obtain hydrogenis one of the key operations in the process, because equilibrium conversion of HI is low (22%at 723 K). A silica membrane prepared by chemical vapor deposition was applied to thedecomposition reaction of HI vapor for improvement of one pass conversion of HI.Hydrogen was successfully removed from the decomposition reactor between 723 K and 873K. HI one-pass conversion was 76.4 % at 873 K by removing hydrogen from the system byusing the silica membrane. Total thermal efficiency can be improved by 1 % for this HIconversion by calculating heat/mass balance of the process. This system was confirmed aspermeation limitation reactor by the simple two-dimensional simulation.