Comparative analysis of different natural gas pyrolysis methods

Thermocatalytic CO{sub 2}-Free Production of Hydrogen from Hydrocarbon Fuels - Final Report for the Period August 1999 - September 2000

“…The determined reaction activation energy of E,= 131.1 kJ/mol, was substantially lower than E, reported in the literature for homogeneous methane decomposition (272.4 kJ/mol) which pointed to a significant contribution of the heterogeneous processes caused by the submicron size carbon particles adhered to the reactor surface. A high temperature regenerative gas heater (HTRGH) for hydrogen and carbon production from NG has been developed [12]. In this process thermal decomposition of NG was conducted in "free volume" of HTRGH using carrier gas (N2 or Hz) which was pre-heated up to 1627-1727°C in the matrix of the regenerative gas heater.…”

Hydrogen production in the γγ-radiolysis of aqueous sulfuric acid solutions containing Al2O3, SiO2, TiO2 or ZrO2 fine particles

“…Regarding global warming due to the greenhouse effect, if hydrogen production without CO 2 emission is achieved, it would be invaluable even if its running costs are somewhat higher than those for natural gas pyrolysis that emits CO 2 gas [1,2]. Many efforts have been made in the field of nuclear energy to apply nuclear heat for producing hydrogen by thermochemical processes without CO 2 emission [3][4][5].…”

A Hybrid Windowless Dual Tube Solar Reactor for Continuous Volumetric Natural Gas Dissociation

“…The advantage is that the gaseous heat transfer fluid can be heated by solar energy leading to a "sustainable flame" as no fossil fuel combustion is required. A close concept was previously proposed by Shpilrain et al (1999) who investigated the pyrolysis technology "in the free volume" in High Temperature Regenerative Gas Heaters in order to avoid pyrocarbon formation on reaction surfaces. However, fossil fuel combustion was considered for thermal power input.…”