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Catalyst for removing organic sulfur in clean coal gas through hydrolysis and preparation method thereof

A catalyst and organic sulfur technology, applied in the direction of chemical instruments and methods, physical/chemical process catalysts, catalytic conversion of impurities, gas purification, etc., can solve problems such as unpleasant odor, reduce catalyst activity, etc., and achieve no lattice collapse, medium temperature Good activity and long life effect

Active Publication Date: 2011-09-14
SANLONG CATALYST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0020] 3) SO 2 in Al 2 o 3 The surface undergoes irreversible chemical adsorption and becomes a structure similar to sulfate, which causes the active site to be covered and reduces the catalyst activity
[0028] 4.2. Difficulties in removing organic sulfur:
[0029] Since the IGCC gas produced by the circulating fluidization method contains less than 0.5% oxygen content, it is prone to sulfation under the condition of hydrogen sulfide, and as a result, sulfur and polysulfides will be generated, resulting in many side reactions and the formation of Mercaptans and thioethers with unpleasant odor

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0055] The following percentages are all percentages by weight based on the total weight of the catalyst.

[0056] In addition, the attapulgite in the present invention can also be replaced by bentonite or activated clay, which are all represented by silicon aluminum oxide in the following examples after being activated at high temperature.

[0057] Purchase commercially available metatitanic acid as raw material, beat with deionized water, adjust pH=8-9 with KOH:water=1:4 alkaline solution, wash and filter to remove unwashed SO 4 Root makes SO 4 The root is controlled at 2.1--4.1% (based on TiO 2 ), the metatitanic acid pretreated in the following examples are all metatitanic acid treated in this way, except that SO 4 The control amount is different, and its control amount is described separately in each embodiment. This example SO 4 Roots are controlled at 2.1%.

[0058] Take by weighing metatitanic acid 200g after pretreatment (TiO content 45%, SO 4 root control at 2....

Embodiment 2

[0062] Take by weighing metatitanic acid 167g after pretreatment (TiO content 45%, SO 4 root control at 4.1%), then weigh activated clay (according to 76% of ignition loss) 19.7g, Ba(NO 3 ) 2 Put 11.2g and 3g of tianqing powder into the kneader and knead fully, and add a certain amount of deionized water according to the dry humidity of the extrudable strips. Put the kneaded materials evenly in plastic bags and put them in an environment of 35-50°C Aged in medium dark for 24 hours.

[0063] Put the aged material into an extruder and extrude it into a cylindrical or clover-shaped strip of Φ3-4×6-9mm. The drying temperature of the strip is 100°C; the drying time is 48 hours. Strictly control the dehydration rate; the activation temperature is 450°C; the activation time is 12 hours. In this way, the TiO-containing 2 , activated clay and barium salt catalyst.

[0064] The chemical composition of this sample: TiO 2 75%, silicon aluminum oxide 15%, BaSO 4 10%. Physical and ...

Embodiment 3

[0066] Take by weighing metatitanic acid 133g after pretreatment (TiO Content 45%, SO 4 root control at 2.7%), then weighed attapulgite (according to 82% loss on ignition) 24.4g, synthetic perovskite composite metal oxide 20g (because the synthetic perovskite composite metal oxide has been roasted at high temperature, Ignition loss is very small, so it is calculated as 100%), put 3g of tianjing powder into the kneader and knead fully, and add a certain amount of deionized water according to the dry humidity of the extrudable strip. The kneaded material is evenly kneaded with plastic Put it in a bag, put it in the environment of 35-50 ℃ and age it away from light for 24 hours.

[0067] The synthetic perovskite composite metal oxide is prepared by the following method: using lanthanum nitrate [La(NO 3 ) 3 .6H 2 O] 443g and manganese nitrate [Mn(NO 3 ) 4 ] 358g, these two solutions were mixed together, and citric acid was added as a buffer. The amount of citric acid was twic...

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Abstract

The invention discloses a catalyst for removing organic sulfur in clean coal gas through hydrolysis, which comprises an attapulgite, a carrier and an active component; the catalyst is characterized in that the carrier is titanium dioxide carrier; and the active component is one or more of barium sulfate, rare earth, alkaline earth and synthesized perovskite composite metal oxide. The catalyst uses modified titanium dioxide as main body and is provided with the attapulgite; the catalyst has sulfation resistance, good hydrothermal resisting stability, and relatively larger specific surface and pore volume; the rare earth is used for adjusting the surface acidity of the catalyst; the synthesized perovskite composite metal oxide is used as the active component; and the catalyst has the characteristics which are not contained in common material in the aspects of particles such as small size effect, surface effect, quantum size effect and macroscopic quantum tunneling effect. The invention further discloses a preparation method of the catalyst for removing organic sulfur in clean coal gas through hydrolysis.

Description

technical field [0001] The invention relates to a catalyst, which is used for the purification of IGCC gas obtained by circulating fluidized bed coal gasification, and is used for removing organic sulfur in the clean gas by using a hydrolysis method and a preparation method. Background technique [0002] Coal gasification is an inevitable trend in "Energy Saving and Emission Reduction" [0003] The electric power industry is a basic industry related to the lifeline of the national economy and national security. According to the report of China Power Environmental Protection Network: since April 2009, the national power installed capacity exceeded 800 million kilowatts. In the middle of 2010, the power installed capacity once again reached a new level, breaking through 900 million kilowatts. It is predicted that the "Twelfth Five-Year Plan" By 2015, the installed capacity of electric power will reach 1.5 billion kilowatts. In such a rapidly developing electric power industry...

Claims

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Application Information

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IPC IPC(8): B01J23/10B01J35/10C10K1/34
Inventor 沈炳龙沈雁军王国兴沈雁鸣孙松良沈雁来王忠英
Owner SANLONG CATALYST
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