HIGH PURITY, HIGH PRESSURE HYDROGEN PRODUCTION WITH IN-SITU CO2 AND SULFUR CAPTURE IN A SINGLE STAGE REACTOR

摘要

A process for producing hydrogen is provided. The process comprises the steps of reforming a gaseous hydrocarbon fuel in the presence of CaO and steam to remove CO2, sulfur and halide contaminants in the form of H2S, COS and HX, where X is a halide, in a solid-phase calcium-containing product comprising CaCO3, CaS and CaX2, thereby producing a mixture of CO and hydrogen; separating the solid-phase calcium-containing product from an enriched gaseous hydrogen product; and regenerating the CaO by calcining the solid- phase calcium-containing product at a condition that is: in the presence of steam, in the presence of CO2, in the presence of synthesis gas, in the presence of H2 and O2, under partial vacuum, or a combination thereof.