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Preparation method of sulfur-tolerant methanation catalyst

A technology for sulfur-resistant methanation and catalyst, which can be used in catalyst activation/preparation, physical/chemical process catalysts, chemical instruments and methods, etc., and can solve problems such as low conversion rate

Inactive Publication Date: 2015-10-28
BEIJING UNIV OF CHEM TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] At present, the reaction temperature of most Mo-based methanation catalysts is 300-650°C, the reaction pressure is 1-3.5Mpa, and the conversion rate of CO is relatively low, generally 58-70%.

Method used

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  • Preparation method of sulfur-tolerant methanation catalyst

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] 1.4gH 3 PO 4 Dissolve in 1.0g deionized water, add 2.46g ammonium molybdate and 1.54g nickel nitrate after dissolving, add 1.62g metatungstic acid after dissolving, dissolve with deionized water and an appropriate amount of citric acid, and finally add a certain amount DMSO, then add γ-Al 2 o 3 , impregnated for 24 h, dried at 120°C for 4 h, and calcined at 500°C for 4 h, the components were NiO:2%, MoO 3 :10%, P 2 o 5 :5%, WO 3 : 10% catalyst Cat.1. Take 2g of the catalyst (20~40 mesh) particles and put them into the reactor to carry out the conversion rate of catalyst CO and CH 4 The selectivity evaluation and catalyst activity evaluation experimental results can be seen in Table 1 below.

Embodiment 2

[0031] 0.84gH 3 PO 4 Dissolve in 1.0g deionized water, add 4.92g ammonium molybdate and 2.31g nickel nitrate after dissolving, add 1.62g metatungstic acid after dissolving, dissolve with deionized water and an appropriate amount of citric acid, and finally add a certain amount DMSO, then add γ-Al 2 o 3 , impregnated for 24 h, dried at 120°C for 4 h, and calcined at 500°C for 4 h, the components were NiO:3%, MoO 3 :20%, P 2 o 5 :3%, WO 3 : 10% catalyst Cat.2. Take 2g of the catalyst (20~40 mesh) particles and put them into the reactor to carry out the conversion rate of catalyst CO and CH 4 The selectivity evaluation and catalyst activity evaluation experimental results can be seen in Table 1 below.

Embodiment 3

[0033] 0.56gH 3 PO 4 Dissolve in 1.0g deionized water, add 3.69g ammonium molybdate and 3.08g nickel nitrate after dissolving, add 2.43g metatungstic acid after dissolving, dissolve with deionized water and an appropriate amount of citric acid, and finally add a certain amount DMSO, then add γ-Al 2 o 3 , impregnated for 24 h, dried at 120°C for 4 h, and calcined at 500°C for 4 h, the components were NiO:4%, MoO 3 :15%, P 2 o 5 :2%, WO 3 : 15% catalyst Cat.3. Take 2g of the catalyst (20~40 mesh) particles and put them into the reactor to carry out the conversion rate of catalyst CO and CH 4 The selectivity evaluation and catalyst activity evaluation experimental results can be seen in Table 1 below.

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Abstract

The invention discloses a sulfur-tolerant methanation catalyst used for production of methane from synthetic gas. The catalyst is an impregnation catalyst mainly adopting oxides of Mo, Ni and W as active components, Al2O3 as a carrier and P2O5 as an assistant. The catalyst is used for synthetic gas with the H2S content being smaller than 400ppm, and realizes a good methanation reaction and good selectivity under a pressure of 1-4Mpa at a temperature of 300-550DEG C on the premise of no deep evolution of the synthetic gas. The invention also discloses a preparation method of the sulfur-tolerant methanation catalyst.

Description

technical field [0001] The invention relates to a sulfur-resistant methanation catalyst and a preparation method thereof, in particular to adopting a watering can and a rotating hub to load active components during the impregnation process. Background technique [0002] The proportion of petrochemical energy consumption is increasing, and natural gas, as a clean energy with high combustion calorific value and less pollution from combustion products, has higher economic and environmental value than fossil energy that pollutes the environment. Therefore, the synthesis and development of natural gas has attracted more and more attention. [0003] The general composition of water gas in the coal gasification process is: H 2 , CO, CO 2、 h 2 O, H 2 S, CH 4 and a small amount of hydrocarbons, generally H 2 The / CO ratio ranges from 1 to 3. Ni-based catalysts are generally used for methanation, but Ni can react with H in water gas 2 S is extremely sensitive, H 2 S can easil...

Claims

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Application Information

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IPC IPC(8): B01J27/19B01J37/02C07C1/04C07C9/04
Inventor 贾中宝张谦温熊杰明
Owner BEIJING UNIV OF CHEM TECH
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