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The method of water gas shift reaction

A shift reaction, water gas technology, applied in chemical instruments and methods, catalyst carriers, physical/chemical process catalysts, etc., can solve the problems of easy spontaneous combustion of catalysts, poor start-stop stability, and high reaction temperature, and achieve good technical support, not easy to spontaneous combustion. , the effect of high low temperature conversion rate

Active Publication Date: 2021-02-09
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is that the prior art has the problems of high reaction temperature, poor start-stop stability, and easy spontaneous combustion of the catalyst, and provides a new method for water-gas shift reaction

Method used

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Experimental program
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preparation example Construction

[0021] The preparation method of nano zirconia provided by the invention, the specific steps are as follows:

[0022] a) dissolving the zirconium salt in water to form a solution, preferably at least one of zirconium nitrate, zirconyl nitrate, zirconium oxychloride and zirconium chloride;

[0023] b) adding alkali solution under stirring until the specified pH value is reached, and the pH value at the end point is in the range of 7-12;

[0024] c) Adjust the ambient temperature to 0-150°C, add a reflux device to reflux the precipitate in the alkaline solution for 1-60 hours, and keep the pH value of the mother liquor constant during the entire reflux process;

[0025] d) Filtrating and washing the precipitate until free of impurity ions, drying and roasting. The drying temperature is 60-150°C, the drying time is 4-48 hours, the roasting temperature is 200-800°C, and the roasting time is 1-12 hours.

Embodiment 1～4

[0028] Dissolve zirconium nitrate, zirconium oxychloride, oxynitrate and zirconium chloride in deionized water to make 0.5mol L -1 solution, turn on the stirring, add concentrated ammonia water (mass fraction 37%) dropwise at a stirring speed of 300rpm to pH=9, add a reflux device, raise the solution temperature to 100°C, and reflux for 48 hours. Filter and wash the precipitate until there are no impurity ions, dry at 120°C, and bake at 500°C for 4 hours to obtain nano-zirconia. Its structural characterization is shown in Table 1.

Embodiment 5～6

[0030] Dissolve zirconium oxychloride in deionized water to make 0.5mol L -1 solution, turn on the stirring, and add NaOH (2mol L) dropwise at a stirring speed of 300rpm -1 ) and KOH (2mol L -1 ) solution to pH=9, add a reflux device, increase the solution temperature to 100°C, and reflux for 48 hours. Filter and wash the precipitate until there are no impurity ions, dry at 120°C, and bake at 500°C for 4 hours to obtain nano-zirconia. Its structural characterization is shown in Table 1.

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Abstract

The invention relates to a water-gas shift reaction method, which mainly solves the problems of high reaction temperature, poor start-stop stability and easy spontaneous combustion of catalysts in the prior art. The present invention generates CO by using the method comprising making water gas contact with catalyst in a fixed-bed reactor. 2 and H 2 The step; the catalyst includes a) 0.1 to 5% by weight of at least one active component selected from Pt, Pd and Au; and b) 95 to 99.9% by weight of the carrier; the carrier is nano-zirconia, Its specific surface area is greater than 100 cm 2 The technical solution per gram solves this problem well, and can be used for water gas change reaction to remove CO in gas or mediate CO and H in syngas 2 proportion of industrial production.

Description

technical field [0001] The invention relates to a method for water gas shift reaction. Background technique [0002] Clean, efficient, safe and renewable hydrogen energy is regarded as the energy with the most development potential in the 21st century. Fuel cells especially with H 2 The proton exchange membrane fuel cell used as fuel can directly convert chemical energy into electrical energy without environmental pollution and is not limited by the Carnot cycle. The energy conversion efficiency is 40-50%, which is much higher than that of a heat engine. No electrolyte loss, long life, high specific power and specific energy. However, currently about 95% of H 2 It is obtained by reforming reaction of crude oil, coal, natural gas, etc. The reformed gas generally contains 1-10% CO, which will cause poisoning of the platinum electrode in the fuel cell and seriously reduce the performance of the fuel cell. [0003] At the same time, the synthesis gas industry is now developi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J23/52C01B3/16B01J23/42B01J21/06B01J32/00B01J35/10
CPCC01B3/16B01J21/066B01J23/42B01J23/52B01J35/615Y02P20/52
Inventor 刘晓钰刘红星谢在库乔明华
Owner CHINA PETROLEUM & CHEM CORP
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