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Medium-high temperature gas desulfurizer and preparation thereof

A desulfurizer, medium-high temperature technology, which is used in combustible gas purification, combustible gas purification/transformation, petroleum industry, etc., can solve the problems of poor mechanical stability, high price, low medium-temperature activity, etc. Fast response and high selectivity

Inactive Publication Date: 2008-10-08
TAIYUAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The purpose of the medium and high temperature gas desulfurizer and the preparation method of the present invention is to overcome the disadvantages of the aforementioned desulfurizers, such as poor mechanical stability, low activity at medium temperature, and high price, and disclose a low price, good mechanical stability, high desulfurization activity, and a simple preparation method Coal gas desulfurizer suitable for medium and high temperature areas

Method used

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  • Medium-high temperature gas desulfurizer and preparation thereof
  • Medium-high temperature gas desulfurizer and preparation thereof
  • Medium-high temperature gas desulfurizer and preparation thereof

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Experimental program
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Effect test

Embodiment approach 1

[0014] Embodiment 1: First, dry the red mud and the inorganic binder at 90°C, grind and sieve them respectively; weigh the red mud, brick clay, magnesium oxide, and titanium dioxide according to the mass percentages in the following table , lanthanum oxide, vanadium pentoxide or lithium oxide, and 2 (wt)% organic binders are completely mixed, kneaded with water, dried at 70°C for 8 hours, and then calcined at 800°C in a muffle furnace for 4 Hours, and finally made by quenching or natural cooling; the activity evaluation of the desulfurizer is carried out in a fixed-bed reactor, and the inner diameter of the reaction tube is 20mm; 3-4:1; vulcanization space velocity is 2000h -1 , the sulfidation reaction gas (dry basis) consists of: 39vol% H 2 , 32vol% CO, 19vol% CO 2 , 1.0vol% CH 4 , 0.2-0.4vol% H 2 S, 0-0.1vol% O 2 , and the rest are N 2 ;The water vapor content accounts for 7-10vol% of the total gas; when the desulfurization efficiency is lower than 90%, it is consider...

Embodiment approach 2

[0018] Embodiment 2: Red mud and inorganic binder are dried at 90°C. The composition of the desulfurizer is the same as that of 4# desulfurizer in Embodiment 1. After mixing thoroughly, add water and knead the formed product and dry at 60°C for 10 hours. , and then placed in a muffle furnace for calcination at 700°C for 6 hours, and finally quenched or naturally cooled to make 5# desulfurizer, and other operating conditions are the same as in Embodiment 1.

Embodiment approach 3

[0019] Embodiment 3: According to the above-mentioned preparation method, the prepared 1# and 2# desulfurizers were subjected to vulcanization experiments at different temperatures; the reaction atmosphere (dry basis) was 39vol% H 2 , 32vol% CO, 19vol% CO 2 , 1.0vol% CH 4 , 0.2vol% H 2 S, the rest are N 2 ; Water vapor content accounts for 7vol% of the total gas. The experimental results are as follows. It can be seen that compared with 1# desulfurizer, 2# desulfurizer has better desulfurization precision and higher sulfur capacity.

[0020]

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Abstract

Disclosed is intermediate or high temperature coal gas desulphurizer and the preparation method which belong to the preparation and application field of gas purification desulphurizer; the desulphurizer is composed of 50-90(wt)% of red mud, 0-10(wt)% sulfuration regeneration accelerant, 0-10(wt) % anti sintering agent, 10-30(wt)% inorganic binder and 2-8% organic binder, and is obtained through the steps as the followings: grinding, mixing, watered kneading, formation, drying and roasting; the desulphurizer is applicable to the temperature ranging from 300-600 DEG C and has the desulfurization effects on the sulfides such as H2S or COS; the desulphurizer has the advantages of low price, fast reaction speed, high activity in the intermediate temperature, pulverization resistance and high selectivity of the regenerated elementary sulfur; the desulphurizer is applicable to the gas purification in the thermoelectric gas co-production system based on coal.

Description

1. Technical field [0001] The medium-high temperature gas desulfurizer and the preparation method of the invention belong to the field of preparation and application of gas purification desulfurizers, and specifically relate to the field of desulfurization and purification of medium-high temperature gas and synthesis gas. 2. Background technology [0002] my country is a country rich in coal and lacking in oil and gas. Under the situation of increasing energy security and environmental protection requirements, improving coal utilization efficiency and strictly controlling environmental pollution is an important research topic at present. Large-scale coal-based polygeneration technology is one of the ways to cleanly and efficiently utilize coal. The inevitable generation of H in the process of coal gasification 2 S, COS, CS 2 (more than 90% of which are H 2 Harmful components such as S), HCN and HCl, when the gas enters the gas turbine at high temperature, it will corrode ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10K1/20
Inventor 常丽萍张宗友任秀蓉芦晓芳李凡谢克昌
Owner TAIYUAN UNIV OF TECH