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Ferrocerium oxide high-temperature coal gas desulfurization agent and preparation

A technology of oxides and desulfurizers, used in metal/metal oxide/metal hydroxide catalysts, chemical/physical process, physical/chemical process catalysts, etc., can solve the problem of insignificant atmospheric effect, serious atmospheric effect and stable cycle Insufficient atmospheric effect, high mechanical strength and high desulfurization efficiency

Inactive Publication Date: 2010-11-03
TAIYUAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The invention aims at providing a high-temperature gas desulfurization agent with high mechanical strength, anti-powdering and high desulfurization efficiency for the problems of poor cycle stability, difficult regeneration and serious atmosphere effect in current high-temperature gas desulfurization. , the atmosphere effect is not significant, easy to regenerate, and a high-temperature gas desulfurizer with simple preparation methods

Method used

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  • Ferrocerium oxide high-temperature coal gas desulfurization agent and preparation
  • Ferrocerium oxide high-temperature coal gas desulfurization agent and preparation

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Experimental program
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Effect test

Embodiment approach 1

[0016] According to the preparation method of cerium-iron oxide high-temperature gas desulfurizer described above, weigh 660g of red mud, 440g of active cerium oxide, 540g of bentonite, and 150g of starch. Extruder to make cylindrical (φ3mm) desulfurizer, after drying or air-drying, divide into three parts, calcined at 650, 750 and 850°C for 4 hours, and cool naturally to make desulfurizer. The mechanical strength of fresh desulfurizer at different calcination temperatures is shown in Table 1.

[0017] Table 1 Mechanical strength of ferrocerium high temperature gas desulfurizer at different calcination temperatures

[0018] Desulfurizer serial number

Embodiment approach 2

[0020] Produce 3# ferric cerium oxide high temperature gas desulfurizer according to Table 1, carry out continuous vulcanization-regeneration cycle in fixed bed reactor, vulcanization reaction temperature is 500°C, space velocity is 2000h -1 , the reaction gas composition is 39%H 2 , 12%CO 2 , 27%CO, 22%N 2 , import H 2 The concentration of S is 2000-4000ppm, when the outlet H 2 When the S concentration exceeds 200ppm, it is considered breakthrough, and the desulfurization experiment is stopped. After the reactor cools down to about 400°C, the regeneration gas (oxygen and water vapor) is introduced to regenerate the desulfurized desulfurizer for recycling.

[0021] The desulfurizer was run continuously for 8 times without obvious pulverization, and the desulfurization efficiency remained stable. figure 1 It is the pre-breakthrough time of the desulfurizer in the 8-cycle test.

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Abstract

The invention relates to high temperature coal gas desulfurizer used in ferrocerium oxide, which pertains to the field of gas purification and desulfurizer preparation. The desulfurizer consists of 20 to 40wt percent activating cerium oxide, 30 to 40wt percent red mud, 20 to 40wt percent binder and 3 to 10wt percent pore-forming agent. The preparation method of the desulfurizer is that the activating cerium oxide, the red mud, the binder and the pore-forming agent are abraded, evenly mixed, kneaded after being added with water, extruded for shaping, dried and baked at high temperature. The desulfurizer has the advantages of high mechanical strength, good cyclical stability, high efficiency of purification and desulfuration, non-significant atmosphere effect and easy regeneration after saturated desulfuration, etc. The invention can be used in the field of moderate-high temperature coal gas purification of the fuel gas of integrated gasification combined cycle (IGCC) and molten carbonate fuel cell (MCFC) technology and the field of the desulfuration purification of the chemical raw material gas which uses coal, oil and natural gas as raw materials.

Description

1. Technical field [0001] The present invention relates to high-temperature gas desulfurization agent of ferric cerium oxide and its preparation, which belong to the field of gas purification and desulfurization agent preparation, and relate to high-temperature gas purifiers in integrated coal gasification combined cycle power generation (IGCC) and fuel cell power generation technologies as well as coal, petroleum, and natural gas as desulfurizers. The invention relates to a preparation method of a chemical raw material gas desulfurization purifying agent prepared from raw materials. 2. Background technology [0002] Coal is the most important energy resource in China, accounting for 92.7% of the proven reserves of domestic fossil energy. The conversion of coal into electric energy is the main means of coal utilization, but currently there are problems such as high consumption and environmental pollution in coal-fired power generation worldwide. The efficiency of traditional...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J23/745
Inventor 郭波常丽萍韩丽娜苗茂谦张志兰谢克昌
Owner TAIYUAN UNIV OF TECH