A synergistic process for producing hydrogen and inhibiting tar production by chemical chain reforming of biomass

Abstract

The invention provides a collaborative process for reforming biomass chemical chains to produce hydrogen and inhibit production of tar. The process mainly using a catalytic cracking reactor, a hydrogen producing reactor and an oxygen carrier regeneration reactor comprises the following steps: firstly mixing biomass with an iron-based compound oxygen carrier; then, carrying out reaction on the mixed raw materials in the catalytic cracking reactor for 20-30 minutes; then, feeding resultants of reaction into a cyclone separator to be separated; discharging synthesis gas from an exhaust opening; further conveying the reduced oxygen carrier in the catalytic cracking reactor into a hydrogen producing reactor to react with steam to prepare hydrogen; and finally, feeding the oxygen carrier after reaction into the oxygen carrier regeneration reactor to continuously and circularly participate in reaction after being oxidized. Compared with the conventional biomass gasification, the collaborative process provided by the invention cooperating a hydrogen production technology by reforming chemical chains with a tar inhibiting technology has the characteristics of low energy consumption, inhibition of tar production and the like. Aiming at biomass with different contents of volatile components, the invention provides two different implementation models.

Description

technical field [0001] The invention belongs to the technical field of chemical chain gasification of solid fuels, and in particular relates to a synergistic process for producing hydrogen by chemical chain reforming of biomass and suppressing tar production. Background technique [0002] At present, the development and utilization of renewable energy has become a topic of common concern in all countries. With the development of science and technology, the demand for energy in various countries is increasing, while the total amount of fossil fuels is decreasing year by year. At the same time, fossil fuels also bring more and more serious environmental problems, so it has become an inevitable trend to replace traditional fossil fuels with renewable energy. Biomass gasification technology has gradually become the focus of research and attention. [0003] The problems of tar and high energy consumption in the process of biomass gasification restrict the further development of...

AI Technical Summary

Problems solved by technology

Chinese patent CN 103672873 A discloses a continuously operating solid fuel chemical chain reaction system, which mainly focuses on the device layout of the chemical chain system, without publishing specific operating process parameters; Chinese patent CN103113917A discloses a solid fuel chemical chain reaction system Gasification hydrogen production system and method, mainly by absorbing CO 2 To produce hydrogen, the concentration of hydrogen produced is relatively low; Chinese patent CN1011117589 A discloses a method for tar treatment and a tar treatment device in biomass gas, mainly through external devices to collect and process the reaction process The gasification efficiency of the tar produced in the process is relatively low; the invention patent CN103551182 A discloses a catalyst for catalytic cracking of biomass tar and its preparation method. The catalyst is prepared separately and is mainly suitable for traditional biomass gasification

In summary, most patents only focus on continuous chemical loop gasification, separate tar removal and catalyst preparation, and do not combine biomass chemical loop gasification with catalytic cracking of tar.

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