Catalyst capable of simultaneously removing COS and H2S in garbage gasification, and preparation method thereof

A catalyst and removal technology, applied in chemical instruments and methods, physical/chemical process catalysts, molecular sieve catalysts, etc., can solve the problems of easy loss of active components, deactivation of active components, easy blockage of catalyst channels, etc., to achieve desulfurization Best efficiency, simple method, low equipment requirements

Active Publication Date: 2020-06-02
QINGDAO TECHNOLOGICAL UNIVERSITY
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] In order to solve the above-mentioned technical problems in the prior art that the active components are easy to lose, which leads to the deactivation of the active components and the easy blockage of the catalyst pores, the present invention proposes a method that can simultaneously remove COS and H in waste gasification. 2 A catalyst for S and its preparation method, which uses mesoporous molecular sieves as a carrier, has a two-dimensional hexagonal structure, and has a large pore size and interconnected channels. After introducing active components, channel blockage can be avoided. The catalyst prepared by this method Good desulfurization efficiency

Method used

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  • Catalyst capable of simultaneously removing COS and H2S in garbage gasification, and preparation method thereof
  • Catalyst capable of simultaneously removing COS and H2S in garbage gasification, and preparation method thereof
  • Catalyst capable of simultaneously removing COS and H2S in garbage gasification, and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0045] The first step is to pretreat the unreleased SBA-15 molecular sieve: first dissolve the SBA-15 molecular sieve in ethanol and reflux, wash and dry it twice, then dissolve it in n-hexane and ultrasonically disperse it, and drop by drop Add chloromethyltrimethylsilane, and continue ultrasonication for 20-40 minutes; finally, transfer the treated SBA-15 molecular sieve into a water bath for reflux for 10-13 hours, filter, wash and dry, and prepare for subsequent experiments.

[0046] The second step, the active component material is carried out pretreatment: weigh 2.5g 50%Mn(NO 3 ) 2 Solution, configure 50mL solution in a beaker; weigh 1.02g SnCl 4 ·5H 2 O, configure 50mL solution in a beaker; mix the two solutions thoroughly, which means MnSn solution;

[0047] Step 3: Weigh 5g of the treated SBA-15 molecular sieve, add it into the beaker of the MnSn solution, and mix well;

[0048] The fourth step, put the mixed solution in a magnetic stirrer, stir at a constant spee...

Embodiment 2

[0052] The difference from Example 1 is:

[0053] In the second step, the mixed solution is FeSn solution (the step of preparing FeSn solution refers to the prior art).

[0054] The COS content of simulated garbage gasification gas is 0.2%, H 2 S content 2.4%, the rest is H 2 O and N 2 Used as balance gas for desulfurization experiments. During the experiment, the COS flow rate was 0.2mL / min, and the H 2 S flow rate 2.4mL / min, carrier gas H 2 O and N 2 The flow rate is 97.4mL / min for desulfurization experiments. The experimental results show that the desulfurization efficiency is 94% at 350°C.

Embodiment 3

[0056] The difference from Example 1 is:

[0057] In the second step, the mixed solution is a ZnSn solution (the step of preparing the ZnSn solution refers to the prior art).

[0058] The COS content of simulated garbage gasification gas is 0.2%, H 2 S content 2.4%, the rest is H 2 O and N 2 Used as balance gas for desulfurization experiments. During the experiment, the COS flow rate was 0.2mL / min, and the H 2 S flow rate 2.4mL / min, carrier gas H 2 O and N 2 The flow rate is 97.4mL / min for desulfurization experiments. The experimental results show that the desulfurization efficiency is 89% at 350°C.

[0059] From above-mentioned embodiment 1-embodiment 3 as can be known, the present invention selects simulated waste gasification gas COS content 0.2%, H 2 S content 2.4%, the rest is H 2 O and N 2 When used as balance gas for desulfurization experiments, at 350°C, MnSnO x / SBA-15 catalyst has the best efficiency.

[0060] The choice of carrier also affects the desulf...

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Abstract

The invention discloses a catalyst capable of simultaneously removing COS and H2S in garbage gasification, and a preparation method thereof, and belongs to the technical field of preparation of desulfurization catalysts. The method comprises the following steps: 1, pretreating an SBA-15 molecular sieve without a template: removing the template, and introducing halogen atoms to modify the molecularsieve; 2, synthesizing an active component solution; and 3, introducing an active component into the pore channels of pretreated molecular sieve through surface tension by adopting an impregnation method, washing, drying, and calcining in an N2 atmosphere to obtain the catalyst. The catalyst prepared in the invention is subjected to H2S and COS removal experiments in a simulated garbage gasification atmosphere, and desulfurization experiments are carried out in a comparison manner to evaluate the desulfurization efficiency. According to the prepared catalyst, the active component can be loaded at fixed positions inside and outside the pore channels, and the component is easy to obtain, so that the catalyst has the advantages of low cost and good desulfurization effect.

Description

technical field [0001] The invention relates to the technical field of preparation of desulfurization catalysts, in particular to a method for removing COS and H in garbage gasification 2 Catalyst of S and its preparation method. Background technique [0002] Nowadays, "garbage siege" has become one of the important factors restricting the development of many areas and affecting the quality of people's lives. Household garbage not only occupies a large amount of land, but also causes continuous pollution to the environment on which human beings depend, thus posing a threat to human health. Garbage gasification is a gasification reaction in which household garbage is crushed and dried before entering the gasification furnace. The temperature of combustible gas produced by gasification is reduced to about 400°C and then sent to the furnace of a coal-fired boiler for combustion. The waste gasification process also produces a large amount of toxic substances, among which sulfu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J29/03B01D53/86B01D53/52B01D53/48
CPCB01J29/0341B01D53/8612B01D53/8603B01J2229/186B01J2229/32B01J29/78B01J37/0207B01J37/0213B01J37/0236B01J37/06B01J37/088B01J2229/12B01D53/8606B01D2255/2073B01D2255/2094B01D2255/20738B01D2255/20792B01D2255/50B01D2257/304B01D2257/308B01D53/8668B01D2257/306
Inventor 张华伟张明珠梁鹏陈栋乔英云焦甜甜张亚青
Owner QINGDAO TECHNOLOGICAL UNIVERSITY
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