Hydrogen Production from Hydrocarbon by Integration of Water−Carbon Reaction and Carbon Dioxide Removal (HyPr−RING Method)

Abstract

A new hydrogen production method, HyPr−RING (Hydrogen Production by Reaction Integrated Novel Gasification), from organic compounds has been proposed. The fundamental concept of this process is integration of the water−hydrocarbon reaction, water-gas shift reaction, and the absorption of CO 2 and other pollutants in a single reactor. Hydrogen productivity from the reactions of organic material(s) with supercritical water was investigated in ranges of pressure 12−105 MPa and temperature 873−973 K by using a micro-autoclave. CO 2 was absorbed by a sorbent during the reactions in the micro-autoclave. It was found that H 2 and CH 4 as the major product gases can be produced from lignite, subbituminous, bituminous, and several organic wastes. For example, 170 cm 3 of gas with about 80% H 2 and 20% CH 4 was produced from 0.1 g of the subbituminous Taiheiyo coal, at 923 K. In this case, about 90% of the carbon in the Taiheiyo coal was converted to produce H 2 and CH 4 . Some organic materials including chlorine and sulfur, such as the poly(vinyl chloride) and the sludge, also produced gases that mainly contained H 2, CH 4, and no chlorine or sulfur gases.