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Low temperature conversion catalyst for partial oxidation of methane to syngas

A synthesis gas and methane technology, applied in molecular sieve catalysts, physical/chemical process catalysts, inorganic chemistry, etc., can solve the problems of poor reaction performance and large metal loading, and achieve improved methane conversion rate, simple preparation process, and improved utilization rate effect

Active Publication Date: 2012-03-14
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The technical problem to be solved by the present invention is the problem of relatively large catalyst metal loading and poor reaction performance at low temperature in the prior art, and provides a new low-temperature conversion catalyst for partial oxidation of methane to synthesis gas

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0014] Weigh 5.1 grams of molecular sieve H-ZSM-5 (SiO 2 / Al 2 o 3 =20), add 7.6 milliliters of nickel nitrate solution (concentration is 6.7×10 -3 g (Ni) / ml), let stand at room temperature, dry at 80°C, and then roast at 600°C to obtain a Ni / H-ZSM-5 catalyst with a mass percentage of 1%.

[0015] Take 0.2 grams of catalyst (20-40 mesh) mm stainless steel reactor, under atmospheric pressure H 2 The temperature was continuously raised to 600°C, and after reduction for 0.5 hours, the same temperature was switched to CH with a molar ratio of 2:1. 4 and O 2 Reaction raw material gas (flow rate is 100 ml / min) after continuous reaction, the volume space velocity is 20000 hours -1 .

[0016] Under the above reaction conditions, the conversion rate of methane on the catalyst is 17.9%, the selectivity of carbon monoxide is 39.7%, and the selectivity of hydrogen is 8.7%.

Embodiment 2

[0018] Weigh 15.7 grams of molecular sieve H-ZSM-5 (SiO 2 / Al 2 o 3 =38), add 23.5 milliliters of nickel nitrate solution (concentration is 6.7×10 -3 g (Ni) / ml), let stand at room temperature, dry at 80°C, and then roast at 600°C to obtain a Ni / H-ZSM-5 catalyst with a mass percentage of 1%.

[0019] Get 0.2 gram catalyst (20~40 orders), adopt the reaction device of embodiment 1 and reaction condition, the conversion rate of methane as a result is 38.9%, carbon monoxide selectivity is 50.0%, and the selectivity of hydrogen is 51.7%.

Embodiment 3

[0021] Weigh 20.9 grams of molecular sieve H-ZSM-5 (SiO 2 / Al 2 o 3 =120), add 31.5 milliliters of nickel nitrate solution (concentration is 6.7×10 -3 g (Ni) / ml), let stand at room temperature, dry at 80°C, and then roast at 600°C to obtain a Ni / H-ZSM-5 catalyst with a mass percentage of 1%.

[0022] Get 0.2 gram catalyst (20~40 orders), adopt the reaction apparatus of embodiment 1 and reaction condition, the conversion rate of methane as a result is 44.4%, carbon monoxide selectivity is 51.2%, and the selectivity of hydrogen is 67.4%.

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Abstract

The invention relates to a low temperature conversion catalyst for the partial oxidation of methane to syngas, which mainly solves the problems that the catalyst has larger metal loading amount and poorer low-temperature reaction performance in the prior art. The invention adopts the technical scheme that H-ZSM-5 with the molar ratio of silicon SiO2 to aluminum Al2O3 of 10 to 500 as a carrier, and the catalyst is composed of metal Ni with the load of 0.1 to 7% (weight) to better solve the problems, and can be used in industrial production of methane to syngas.

Description

technical field [0001] The invention relates to a low-temperature conversion catalyst for producing synthesis gas by partial oxidation of methane. Background technique [0002] Natural gas is a clean energy with abundant reserves and a high-quality chemical raw material. With the increasing scarcity of oil and coal resources, the proportion of natural gas in the entire energy structure will continue to increase. At present, China's energy consumption is dominated by coal, and the proven recoverable reserves of natural gas rank 17th in the world. If calculated by per capita possession, it is less than 1 / 10 of the global average level. Therefore, how to effectively use precious natural gas resources is of great importance. significance. Natural gas is a low-carbon hydrocarbon mixture dominated by methane. Due to CH 4 It has a regular tetrahedral space structure and an electronic structure similar to an inert gas, so CH 4 Activation of C-H bonds in molecules and CH 4 The ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J29/46C01B3/40
CPCY02P20/52
Inventor 刘颖王仰东刘苏
Owner CHINA PETROLEUM & CHEM CORP