A hydrogen production process method and system

Abstract

The invention provides a hydrogen production process method. According to the hydrogen production process method, raw material gas enters a pyrolysis reactor and is subjected to a reaction in the presence of iron powder, the reaction effluent is separated to obtain a gas phase material and a solid phase material, the gas phase material is recovered by a sulfur collector to obtain elemental sulfur, the obtained gas phase material enters desulfurization equipment and reacts with an absorbent to obtain a hydrogen-rich gas and a rich absorption liquid, the rich absorption liquid enters a regeneration tower to obtain a regenerated absorbent and desorption gas, and the solid phase material enters a magnetic field separator and is separated t obtain ferrous sulfide and iron powder. The present invention further provides a hydrogen production process system. With the method and the system f the present invention, the H2S decomposition rate can be improved.

Description

technical field [0001] The invention relates to the technical field of environmental protection, in particular to a new technology for producing hydrogen in the acid gas treatment process. Background technique [0002] Hydrogen sulfide is a toxic gas that pollutes the environment and widely exists in oil and gas exploration, petrochemical, coal chemical and other industries. It must be recycled during the production process. [0003] There are two main methods for the recovery and treatment of hydrogen sulfide in the industry, namely the Claus method and the wet absorption method: the Claus method mainly converts H 2 S is converted into elemental sulfur and water through partial incomplete oxidation and exchange reaction; the wet absorption process is a method of directly oxidizing H with an oxidant in the liquid phase. 2 S method. The disadvantages of these two types of sulfur recovery methods are that the process consumes a lot of energy and the hydrogen has not been rec...

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Problems solved by technology

h 2 The catalytic thermal decomposition of S refers to the H 2 S gas undergoes thermal decomposition reaction on transition metal sulfides, but due to the influence of chemical equilibrium, H 2 The decomposition rate of S is low, so the equilibrium concentration of hydrogen in the system is low; H 2 The direct thermal decomposition of S is the thermal cracking of H under non-catalytic conditions 2 S is decomposed into S and H 2 , due to H 2 The decomposition of S into elemental sulfur and hydrogen requires endothermic reaction, which is a thermodynamically unfavorable reaction, and only at very high temperatures has a higher decomposition rate. According to literature reports, in order to make H 2 S obtains a decomposition rate of more than 50% through direct thermal decomposition, and the reaction temperature must exceed 1658K; the superadiabatic decomposition method is H 2 S in the absence of catalyst and external heat source, using porous media superadiabatic combustion technology to realize H 2 S decomposition, this technology due to the introduction of air for combustion, makes H 2 S in H 2 not fully recycled

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