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Process for producing synthetic gas by methane and CO2 reformation

A carbon dioxide and synthesis gas technology, applied in chemical instruments and methods, inorganic chemistry, bulk chemical production, etc., can solve problems such as activity decline, unfavorable industrial application research, bed clogging, etc., and achieve the effect of high catalytic stability

Inactive Publication Date: 2009-06-17
LANZHOU INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, nickel-based catalysts are prone to carbon deposition, which leads to decreased activity and bed plugging [Journal of Catalysis, Vol. Choose in 10000ml h -1 g -1 Following [Journal of Fuel Chemistry, Vol. 34, No. 4, Page 444], this is not conducive to future industrial application research, so it is important for future industrial production to study nickel-based catalysts to obtain excellent catalytic performance under larger space velocity. significance

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0013] Embodiment 1: 1.13 grams of nickel nitrate are dissolved in the mixed solution of 4.83 milliliters of water and 6.00 milliliters of absolute ethanol, and stirred. After mixing evenly, adjust the pH value to 2 with dilute hydrochloric acid, then add 3.78 ml of ethyl orthosilicate, and then stir at room temperature for 3 hours. Then, a mixed solution of 4.35 ml of n-butyl titanate and 6 ml of absolute ethanol was added dropwise, stirred at room temperature for 2 hours, and then refluxed at 90° C. for 18 hours. Finally, it was dried at 120°C and calcined at 700°C for 5 hours in an air atmosphere to obtain the finished catalyst.

[0014] Get 0.1 gram of 26-46 meshes of this catalyst and place it in a quartz reaction tube with a diameter of 6 mm, feed 1:1 methane and carbon dioxide, and its space velocity is 36000ml h -1 g -1 , the reaction temperature is 700°C, and the reaction is carried out under normal pressure.

[0015] The experimental results are shown in Table 1. ...

Embodiment 2-8

[0017] Described by Table 1

[0018] Table 1

[0019] Reality

[0020] 6 10 1 850 200 18000 89.4 97.2 85.5 93.3 7 10 1 700 100 18000 64.6 74.7 59.6 69.7 8 10 1 700 100 72000 52.9 62.5 48.1 57.7

Embodiment 9-11

[0022] The experimental conditions are: catalyst (NiO content is 10%, TiO 2 with SiO 2 The mass ratio is 1), 200mg, space velocity 18000ml h -1 g -1 , 850°C. Described by Table 2.

[0023] Table 2

[0024] Example time

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PUM

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Abstract

The invention discloses a method for preparing synthesis gas by reforming methane and carbon dioxide. An active component of a catalyst adopted by the method is NiO, a carrier consists of TiO2 and SiO2, the reaction temperature is between 700 and 850 DEG C under normal pressure, and the components are subjected to reforming reaction in a fixed bed reactor under the operation condition that the air speed is 18,000 to 72,000mlh<-1>g<-1>. The highest conversion rates of the methane and the carbon dioxide reach more than 88 percent and 97 percent respectively, the highest yields of H2 and CO reach more than 85 percent and 93 percent respectively, and the catalyst after being stabilized for 30 hours does not lose activity remarkably.

Description

technical field [0001] The invention relates to a method for reforming methane and carbon dioxide to produce synthesis gas. Background technique [0002] Methane and carbon dioxide are reformed to produce synthesis gas. Using methane and carbon dioxide, two greenhouse gases, the ratio of hydrogen to carbon monoxide in the produced synthesis gas is 1, which can be directly used as raw materials for carbonylation and Fischer-Tropsch synthesis. Moreover, due to the strong endothermic nature of this reaction, this reaction has broad application prospects in chemical energy storage. Therefore, this reaction is of great practical significance in the effective use of natural gas, the reduction of greenhouse gas effects, and the mitigation of energy crises [Natural Gas Chemical Industry, Vol. 27, No. 5, Page 12]. [0003] In the current field of research on the reforming reaction of methane and carbon dioxide, it has been found that nickel-based catalysts have similar catalytic act...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B3/40
CPCY02P20/52
Inventor 王晓来张三兵
Owner LANZHOU INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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