Highly selective oxygen-containing coal mine methane catalytic deoxidation catalyst and preparation method thereof

A catalytic deoxidation catalyst, high selectivity technology, applied in the direction of metal/metal oxide/metal hydroxide catalyst, physical/chemical process catalyst, chemical instrument and method, etc., can solve the problem of increasing refrigeration power consumption, increasing safety hazards, etc. problems, to achieve the effect of eliminating potential safety hazards, high catalytic activity and stability, and high methane complete combustion reaction selectivity

Active Publication Date: 2015-01-14
DALIAN 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

While the H produced during the deoxidation process of coalbed methane 2 and CO, to increase the refrigeration power consumption in the subsequent deoxygenated coalbed methane liquefaction process; in addition, the by-product H 2 and CO content will be compared with the incompletel

Method used

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  • Highly selective oxygen-containing coal mine methane catalytic deoxidation catalyst and preparation method thereof
  • Highly selective oxygen-containing coal mine methane catalytic deoxidation catalyst and preparation method thereof
  • Highly selective oxygen-containing coal mine methane catalytic deoxidation catalyst and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] Weigh 144.1g of urea, dissolve it in 1000ml of deionized water; weigh 37.92g of SnCl 2 , dissolve it in 500ml deionized water; then, transfer all the aqueous solutions of the two into a beaker, stir, and dissolve completely; add 500ml of water, and transfer it to a three-necked flask; then place it in an oil bath, while Heating while stirring, when the color of the solution becomes turbid, stir at this temperature for another 2 hours; then, cool and filter, and wash with Cl - , then dried at 120°C overnight; baked at 650°C for 2 hours to obtain SnO 2 Carrier 30g.

[0038] After fully grinding and calcination at 650 °C for 2 h 2 The carrier powder is passed through a 200-mesh sieve; compressed into tablets at 20 MPa; pulverized, sieved, and 12-20-mesh granules are taken for later use.

[0039] Prepare 2M Ce(NH 4 ) 2 (NO 3 ) 6 and 2M Zr(NO 3 ) 4 aqueous solution; then, weigh 4g12-20 mesh SnO 2 Particles, measure their water absorption; measure 2.5ml of 2M Ce(NO ...

Embodiment 2

[0042] Using the same method, the catalyst sample 1%Pd / 19.8%CeO 2 -ZrO 2 (Ce:Zr=4:1) / 79.2%TiO 2 , the sample code is Samp-2.

Embodiment 3

[0044] Weigh Ce(NO 3 ) 3 .6H 2 O and Zr(NO 3 ) 4 .5H 2 O each 104.2g and 25.76g, it is dissolved in 3000ml deionized water, then add 216.22g of urea; it is placed in an oil bath, heated while stirring, when the color of the solution becomes turbid, again at this temperature Stir for 2 hours; after aging for another 2 hours, filter while washing; finally, wash with isopropanol to remove water; dry at 120°C overnight, and roast at 650°C for 2 hours to obtain a Ce-Zr ratio of 4:1 Ce-Zr composite oxide;

[0045] Get the SnO that adopts the same method that embodiment 1 makes 2 Sample 20g, uniformly disperse it in 14ml HNO with pH value of 1.2 3 solution and 16ml deionized water, adopt ball milling method ball milling for 24 hours, make coated ball milling slurry;

[0046] Immerse the 8×8×10mm cordierite honeycomb ceramics in the ball mill slurry prepared above, take it out after 10 minutes, remove the excess sol in the channel with air flow, dry it in a vacuum oven at 50°C...

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Abstract

The invention relates to a highly selective oxygen-containing coal mine methane catalytic deoxidation catalyst and a preparation method thereof. One of or a combination of several of the noble metal Pt, Pd and Rh is adopted as the main active component, rare earth, alkaline earth or alkaline metal is taken as the additive, and one or more of ZrO2, TiO2, Co3O4, SnO2, CuO, Fe2O3, CeO2, and SiO2 are adopted as the carrier. The catalyst carrier can be molded through different methods, and then the additive and the active component are employed to coat the molded carrier, or the carrier, the additive and the active component are employed to coat (wall load) the whole structure catalyst or metallic honeycomb for application. The catalyst provided by the invention has the characteristics of complete combustion activity of methane and selectivity under high fuel-rich atmosphere, no H2 or CO in the product, and the like. The catalyst can be applied to catalytic deoxidation of oxygen-containing coal mine methane, and also can be used for other combustible gas removal processes to realize new energy development and energy saving and emission reduction.

Description

technical field [0001] The invention belongs to the technical field of new energy development and energy saving and emission reduction, and specifically relates to a highly selective oxygen-containing coal bed gas catalytic deoxygenation catalyst and a preparation method thereof. Background technique [0002] Although coalbed methane is a clean and high-quality fossil resource, the methane concentration and gas composition of coalbed methane vary greatly due to different mining methods. It can be roughly divided into three categories, ground extraction gas (Coal Bed Methane, CBM), oxygenated coal bed methane (Coal Mine Methane, CMM) and ventilation gas (Ventilation Air Methane, VAM). Among them, the CBM extracted from the ground has a methane concentration of more than 90%, and the rest is N 2 and trace impurities. At present, this type of coalbed methane can be directly separated and liquefied to produce CNG or LNG. The treatment technology of this type of coalbed methane ...

Claims

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Application Information

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IPC IPC(8): B01J23/63B01J23/89C10L3/10
Inventor 王胜王树东高典楠汪明哲王岩
Owner DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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