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A highly selective oxygen-containing coal bed gas catalytic deoxygenation catalyst and preparation method thereof

A catalytic deoxygenation catalyst, high selectivity technology, applied in gas fuel, petroleum industry, fuel and other directions, can solve the problems of increasing refrigeration power consumption, increasing safety hazards, etc., to eliminate safety hazards, high catalytic activity and stability, high The effect of complete combustion of methane on selectivity

Active Publication Date: 2017-06-13
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 incompletely removed O 2 Co-existing in boil-off gas (BOG) increases the safety hazard of the process; therefore, the development of highly active and selective methane combustion catalysts is of great significance for the efficient recovery and utilization of oxygen-containing coalbed methane

Method used

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  • A highly selective oxygen-containing coal bed gas catalytic deoxygenation catalyst and preparation method thereof
  • A highly selective oxygen-containing coal bed gas catalytic deoxygenation catalyst and preparation method thereof
  • A highly selective oxygen-containing coal bed gas catalytic deoxygenation 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

A highly selective oxygen-containing coal bed gas catalytic deoxidation catalyst and its preparation method, using one or more combinations of noble metals Pt, Pd, Rh as the main active component, using rare earth, alkaline earth or alkali metal as additives, and ZrO 2 、TiO 2 、Co 3 o 4 , SnO 2 , CuO, Fe 2 o 3 , CeO 2 , SiO 2 One or several of them are carriers. The above-mentioned catalyst carriers can be formed by different methods, and then the auxiliary agent and active components are coated on the shaped carrier or the carrier, auxiliary agent and active components are coated (wall-loaded) on the Monolithic structure catalyst or metal honeycomb for application. The catalyst provided by the invention has high activity and selectivity for the complete combustion of methane in a fuel-rich atmosphere, and the product does not contain H 2 and CO and other characteristics. The catalyst can be applied to catalytic deoxidation of oxygen-containing coal bed gas, and can also be used in other combustible gas removal processes to realize new energy development, 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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Patent Type & Authority Patents(China)
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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