Sulfur-tolerant methanation catalyst and preparation method thereof

A sulfur-resistant methanation and catalyst technology, applied in the direction of physical/chemical process catalysts, chemical instruments and methods, metal/metal oxide/metal hydroxide catalysts, etc., can solve environmental pollution, nitrogen oxide pollution, and reduce magnesium Problems such as production temperature and production cost of aluminum spinel, achieve high strength and strength stability, and solve the effect of environmental pollution

Active Publication Date: 2014-01-08
刘博男
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to solve the above problems, the present invention uses Mg-Al spinel as a carrier, and adds a highly dispersed carrier stability aid to improve the strength and activity stability of the catalyst; the traditional Mg-Al spinel preparation method has oxidation The high-temperature sintering method of magnesium and r-Al2O3, r-Al203 and magnesium nitrate decomposition method, the former requires a high temperature above 1000 degrees, the Mg-Al spinel preparation process is complex and costly; the latter decomposition temperature is low but will produce serious nitrogen Oxide pollution, the present invention adopts magnesia hydration method to produce magnesia-aluminum spinel, which not only reduces the production temperature of magnesia-alumina spinel and thus reduces the production cost, but also does not produce nitrogen oxides in the production process, which better solves the problem of environmental pollution. pollution problem

Method used

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  • Sulfur-tolerant methanation catalyst and preparation method thereof
  • Sulfur-tolerant methanation catalyst and preparation method thereof
  • Sulfur-tolerant methanation catalyst and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Take 150 grams of pseudo-boehmite, add MgCO 3 85 grams, add 150ml of water and mix well, dry at 120°C and roast at 600°C for 3 hours to obtain magnesium aluminum spinel masterbatch, use steam to cure the masterbatch for 10-12 hours and then dry to obtain magnesium aluminum spinel stone. Take 100 grams of magnesium aluminum spinel and grind it to 180 mesh, knead it with 10% magnesium nitrate solution, extrude it and roast it at 550° C. for 3 hours to obtain the carrier. Take 100 grams of the carrier, mix 12 grams of ammonium tetramolybdate and 90 grams of cobalt nitrate into a co-impregnation solution, impregnate the carrier with equal volume of the solution, dry and / or roast to obtain the catalyst. The catalyst number is JWH-1. The comparison of its strength and strength stability is shown in Table 2.

Embodiment 2

[0027] The preparation method is the same as in Example 1, and the difference is that MgCO 3 85 grams replaced by 60 grams of Mg(OH) 2 , the catalyst number is JWH-2. Its performance comparison is shown in Table 2.

Embodiment 3

[0029] The preparation method is the same as in Example 1, and the difference is that MgCO 3 85 grams were changed into 42 grams of MgO, and the catalyst number was JWH-3. Its performance comparison is shown in Table 2.

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Abstract

The invention relates to a high-strength sulfur-tolerant methanation catalyst and a preparation method thereof. The catalyst uses magnesium aluminate spinel as a carrier and comprises the following active components: on the basis of the total amount of the catalyst, 0.2 to 20% of cobalt in terms of CoO and 1 to 30% of molybdenum in terms of MoO3, with the balance being an active auxiliary agent. The preparation method for the catalyst is a kneading or immersion method. According to the invention, production temperature for magnesium aluminate spinel is decreased, so production cost is reduced; generation of nitrogen oxide in the process of production is avoided, so the problem of environmental pollution is overcome. The catalyst prepared in the invention can be used at a pressure no more than 6.0 MPa and has high strength and strength stability.

Description

technical field [0001] The invention relates to a sulfur-resistant methanation catalyst and a preparation method thereof, in particular to a sulfur-resistant methanation catalyst with magnesium-aluminum spinel as a carrier and a preparation method thereof. Background technique [0002] In recent years, with the rapid growth of people's demand for natural gas, coal-to-natural gas technology has attracted more and more attention. Catalysts used in coal-to-natural gas technology are divided into two categories, one is non-sulfur-resistant nickel-based catalysts, which have the characteristics of high reactivity and large operating space velocity, and have been used in industry. Fine desulfurization before reaction, complex process, relatively high equipment investment and operating costs. The other is a sulfur-resistant methanation catalyst, which can be operated under the condition of sulfur-containing raw material gas. The raw material gas can be directly subjected to methan...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/882B01J23/887
Inventor 刘博男纵秋云
Owner 刘博男
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