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Preparation method and application of alpha-MoC1-x loaded Pt-Cu bimetallic water gas shift catalyst

A technology for transforming catalysts and catalysts, which is applied in the direction of physical/chemical process catalysts, chemical instruments and methods, and non-metallic elements. The effect of good stability and simple preparation method

Active Publication Date: 2022-05-27
DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] Based on the above research status, the present invention proposes a kind of α-MoC 1-x Loaded Pt-Cu bimetallic water vapor shift catalyst and its preparation method and application to solve the problems in the prior art that do not meet the requirements of fuel cell applications such as high catalyst cost, poor low temperature water vapor shift activity, and poor reaction stability

Method used

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  • Preparation method and application of alpha-MoC1-x loaded Pt-Cu bimetallic water gas shift catalyst
  • Preparation method and application of alpha-MoC1-x loaded Pt-Cu bimetallic water gas shift catalyst
  • Preparation method and application of alpha-MoC1-x loaded Pt-Cu bimetallic water gas shift catalyst

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Experimental program
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Effect test

Embodiment 1

[0031] (1) 2.4718g ammonium molybdate was dissolved in 80mL deionized water to obtain an ammonium molybdate solution with a concentration of 0.025mol / L; then in the ammonium molybdate solution, dropwise the concentrated nitric acid of 65% mass concentration, nitric acid and molybdic acid The molar ratio of ammonium is 75:1, and then the acidified ammonium molybdate solution is transferred to a hydrothermal kettle for hydrothermal reaction at 180 °C for 24 h. After the hydrothermal reaction finishes, the hydrothermal kettle is lowered to room temperature, then the liquid in the hydrothermal kettle is transferred and filtered, and the obtained solids are washed with deionized water and dehydrated ethanol respectively and dried to obtain solid MoO 3 powder.

[0032] (2) with MoO obtained in step (1) 3 The solid powder is used as a carrier, and chloroplatinic acid with a platinum loading of 0.2 wt% and copper nitrate trihydrate with a copper loading of 5 wt% are respectively weig...

Embodiment 2

[0035] The process and conditions are the same as in Example 1, except that in step (2), the copper nitrate trihydrate is weighed according to the copper loading amount of 2.5wt%, and the obtained catalyst is recorded as 0.2Pt-2.5Cu / α-MoC 1-x .

Embodiment 3

[0037] The process and conditions are the same as in Example 1, except that in step (2), the copper nitrate trihydrate is weighed according to the copper loading amount of 7.5wt%, and the obtained catalyst is recorded as 0.2Pt-10Cu / α -MoC 1-x .

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Abstract

The invention relates to a preparation method and application of an alpha-MoC1-x loaded Pt-Cu bimetallic water gas shift catalyst. The invention provides a method for preparing a Pt-Cu bimetallic water gas shift catalyst loaded on an alpha-MoC1-x carrier with a nanorod structure. The active metal of the catalyst prepared by the method is dispersed in a monatomic state, the active metal utilization rate is high, the noble metal content is low, and the cost is low. The catalyst prepared by the method has excellent water-gas shift reaction catalytic performance; the activity of the catalyst is obviously higher than that of a commercial Cu / ZnO / Al2O3 low-temperature water-gas shift catalyst; meanwhile, the catalyst prepared by the method also shows excellent stability, and under the conditions that the temperature is 175 DEG C, the molar ratio of water to CO is 2: 1 and the mass space velocity is 90000 ml.h <-1 >. G <-1 >, the CO conversion rate is maintained at 95% or above within 50 hours. The preparation method of the catalyst is simple and controllable, and the prepared catalyst is high in water vapor shift activity, good in stability, low in precious metal content and low in cost and has a good application prospect.

Description

technical field [0001] The present invention relates to α-MoC 1-x A supported Pt-Cu bimetallic water-gas shift catalyst, a preparation method and an application thereof belong to the technical field of new energy. Background technique [0002] The water gas shift reaction is an important chemical reaction for the production of high-purity hydrogen for fuel cells, selective hydrogenation and ammonia synthesis. With the development of technology, H 2 It will become a potential substitute for non-renewable fossil fuels, which can effectively alleviate the environmental problems associated with the burning of fossil fuels. In recent years, due to the rapid development of fuel cell technology, the 2 Preparation presents higher challenges. However, whether using fossil fuels or using ethanol or methanol as raw materials, the reforming process produces H 2 accompanied by a large amount of CO production. Studies have shown that CO can severely poison catalysts for various appl...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/22B01J35/02C01B3/16B01J35/00
CPCB01J27/22C01B3/16C01B2203/1076C01B2203/1041C01B2203/1205C01B2203/1082B01J35/40Y02P20/52
Inventor 丛昱陈帅许国梁吴春田唐南方冯璐
Owner DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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