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High sulfur-resistant catalyst for using syngas to produce methane, preparation method and application

A catalyst and methane production technology, applied in the direction of hydrocarbon production from carbon oxides, etc., can solve the problems of poor activity, inability to directly apply coal-to-natural gas methanation process, low sulfur tolerance, etc., achieve strong sulfur tolerance and simple preparation Ease of operation and reduction of preparation cost

Inactive Publication Date: 2015-10-14
SHANXI INST OF COAL CHEM CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, the existing methanation sulfur-tolerant catalysts generally have shortcomings such as low sulfur tolerance and poor activity, and cannot be directly applied to the methanation process in coal-to-natural gas

Method used

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  • High sulfur-resistant catalyst for using syngas to produce methane, preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] At room temperature, mix 100g of pseudo-boehmite with 60ml of dilute nitric acid with a concentration of 6%, knead and extrude into strips, dry naturally at room temperature for 24 hours, then dry at 120°C for 12 hours, and then bake at 450°C 10 hours, produced Al 2 o 3 carrier.

[0037] The obtained carrier is pulverized and ground to 40-60 mesh. According to MoO in the final sample 3 The mass percentage is 10%, V 2 o 5 The mass percentage is calculated as 5%, and the corresponding amount of (NH 4 ) 6 Mo 7 o 24 4H 2 O and NH 4 VO 3 reagent. The (NH 4 ) 6 Mo 7 o 24 4H 2 The O solution was impregnated on the above-mentioned carrier, impregnated at room temperature for 6 hours, then dried at 60° C. for 6 hours, and then dried at 120° C. for 12 hours. After drying, it was baked at 500° C. for 4 hours in an air atmosphere. Then the auxiliary component NH4 VO 3 The solution was impregnated with the sample obtained above by equal volume method, impregnated...

Embodiment 2

[0040] At room temperature, mix 100g of pseudo-boehmite with 70ml of 5% dilute nitric acid, knead and extrude into strips, dry naturally at room temperature for 16 hours, then dry at 80°C for 12 hours, and then bake at 550°C 6 hours, produced Al 2 o 3 carrier.

[0041] The obtained carrier is pulverized and ground to 40-60 mesh. According to MoO in the final sample 3 The mass percentage composition is 25%, and the NiO mass percentage composition is 0.3% to calculate, take corresponding amount (NH 4 ) 6 Mo 7 o 24 4H 2 O and NH 4 VO 3 reagent. Simultaneously (NH 4 ) 6 Mo 7 o 24 4H 2 O and Ni(NO 3 ) 2 ·6H 2 O solution was impregnated in the prepared Al 2 o 3 On the carrier, it was immersed at room temperature for 4 hours, then dried at 50°C for 10 hours, and then dried at 120°C for 8 hours. After drying, it was baked at 400° C. for 8 hours in an air atmosphere. Finally, the catalyst composition is MoO 3 :NiO:Al 2 o 3 =25:0.3:74.7 (mass ratio), recorded as...

Embodiment 3

[0044] Co-precipitation products were prepared by using 1.75 mol / L zirconium nitrate solution and 0.75 mol / L ammonia water at 40°C with continuous stirring. The obtained precipitate was aged for 4 hours, then suction filtered, washed, and then calcined at 500°C for 4 hours in the air to obtain ZrO 2 carrier.

[0045] Will produce ZrO 2 The carrier is pulverized and ground to 40-60 mesh. According to MoO in the final sample 3 The mass percentage is 1%, Co 2 o 3 The mass percentage composition is calculated as 24%, and the corresponding amount (NH 4 ) 6 Mo 7 o 24 4H 2 O and Co(NO 3 ) 2 ·6H 2 O reagent. First, an appropriate concentration of (NH 4 ) 6 Mo 7 o 24 4H 2 O impregnated in the above-prepared ZrO 2 The carrier was soaked at room temperature for 8 hours, dried at 80°C for 4 hours, and then dried at 120°C for 14 hours. The dried catalyst was calcined at 600°C for 9 hours in an air atmosphere. Then Co(NO 3 ) 2 ·6H 2 O was also impregnated with the sa...

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Abstract

A high sulfur-resistant catalyst for using syngas to produce methane has bimetallic active components, comprising an M oxide as a first active component, an M1 oxide as a second active component and an S oxide as a carrier. The mass percentages of components of the catalyst are: M is 0.5-45%, M1 is 0.2-25% and the remaining component is the oxide carrier S. The high sulfur-resistant catalyst is strong in sulfur resistance, high in methanation activity, low in carbon deposit and simple in preparation.

Description

technical field [0001] The invention belongs to a catalyst and its preparation method and application, in particular to a supported sulfur-resistant catalyst which can be used in the methanation link of synthesis gas in the coal-to-natural gas process, as well as its preparation method and application. Background technique [0002] "Coal-rich, oil-poor, and gas-poor" is the characteristic of my country's energy structure, which also determines my country's coal-based consumption pattern. The geographical distribution of my country's coal resources is very unbalanced, mainly concentrated in the northern and central and western regions, and the reserves in the economically developed coastal areas in the southeast are very small. Most of my country's coal reserves are low-rank coals, which are not suitable for long-term storage and long-distance transportation. [0003] Natural gas is a clean energy with safe use and high calorific value. In recent years, the proportion of nat...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/28B01J23/883B01J23/882C07C9/04C07C1/04
Inventor 李德宝孙德魁林明桂贾丽涛侯博张庆庚李晓崔晓曦曹会博范辉
Owner SHANXI INST OF COAL CHEM CHINESE ACAD OF SCI
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