Progress in the research of hydrogen production fr

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Progress has been made in the research on hydrogen production by photocatalytic decomposition of hydrogen sulfide

the project "Research on the design and process of catalyst for hydrogen production by solar photodegradation of hydrogen sulfide" completed by the Institute of petrochemistry, Heilongjiang Academy of Sciences, recently passed the expert acceptance that the control system organized by Heilongjiang Provincial Department of science and technology is a system to control the operation of the experimental machine

hydrogen sulfide is a kind of malodorous, highly toxic and corrosive acid gas. It is a by-product of oil refining, natural gas processing and other chemical synthesis processes. The national emission of hydrogen sulfide can reach 8-10 million tons/year. Claus process is mostly used in the treatment of hydrogen sulfide waste gas in China, that is, hydrogen sulfide is partially oxidized into water and sulfur, and the hydrogen in it has not been recycled. Hydrogen energy is the most promising energy to replace fossil fuels in the future. At present, industrial hydrogen is produced by steam reforming or electrolytic water from light hydrocarbons, coal, natural gas and methanol. It is expensive and expensive, so it is difficult to be widely used as fuel

the reaction conditions of photocatalysis and photochemical hydrogen sulfide decomposition process are mild, and cheap and abundant solar energy can be used, which can not only realize the conversion and utilization of solar energy, but also reduce the production cost. It has high research value and application prospects

with the support of the Heilongjiang Provincial Science Fund for Distinguished Young Scholars and the national "863" project, the research group directed by Bai Xuefeng, a researcher at the Institute of petrochemical research, Heilongjiang Academy of Sciences, has conducted in-depth and systematic research on the design and process of photocatalysis and photochemical decomposition of hydrogen sulfide to produce hydrogen, aiming at the problems of environmental pollution and waste of hydrogen resources in the production process of refineries and natural gas industries

the research group used the coprecipitation method to prepare a series of cdxzn1 XS solid solution photocatalysts with controllable energy levels. The rate of hydrogen production by cd0.7zn0.3s photocatalysis can reach 11.1mmol/(g · h); Cds/s, n-TiO2, cds/c-tio2 and cds/n-tio2 composite photocatalysts were prepared by impregnation calcination hydrothermal synthesis method. The visible light catalytic hydrogen production performance was twice higher than that of undoped modification; Cds/hy and cds/al-mcm-41 supported photocatalysts prepared by ion exchange deposition method form stable, molecular size nano CDs clusters, which can improve the charge separation efficiency and photocatalytic hydrogen production efficiency, which is 5 ~ 6 times that of single component CDs. The catalytic decomposition of hydrogen sulfide by ultraviolet light (with a characteristic wavelength of 253.7nm) can produce the synergistic effect of photochemical decomposition and photocatalytic reaction. The decomposition rate of hydrogen production can reach 4.04ml/w · h, which is much higher than that of visible light catalytic hydrogen production. Through XRD, the key units and components of the system are manufactured with current international advanced technology, including TG, IR, XPS, SPS, ICP, SEM and TEM, The graphene flagship project will be divided into initial stages to study the structure and photochemical properties of the catalyst (from October 1, 2013 to March 31, 2016, the characterization was carried out, and the mechanism of improving the efficiency of photocatalytic decomposition of hydrogen sulfide to produce hydrogen was described, which provided an experimental basis for the further application of this technology.

at present, this research has applied for four national invention patents, one of which has been authorized.

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