Titanium-based shift catalyst as well as preparation method and application thereof

A shift catalyst, titanium-based technology, applied in the field of titanium-based shift catalyst and its preparation, can solve the problems of anti-sulfurization, poor thermal stability, carrier phase change, etc.

Inactive Publication Date: 2020-05-15
SANLONG CATALYST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this type of supported potassium-containing catalyst has problems such as potassium loss, anti-sulfurization, poor thermal stability, phase change of the carrier, and short service life of the catalyst during use.

Method used

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  • Titanium-based shift catalyst as well as preparation method and application thereof
  • Titanium-based shift catalyst as well as preparation method and application thereof
  • Titanium-based shift catalyst as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0066] Weigh titanium silicon powder 102.44g (TiO 2 / SiO 2 =3:1 solid content 82%), hydroxypropyl methylcellulose (CMC) 1g, and cyanine powder 2.5g are put into the kneader, start the kneader and add a certain amount of deionized water, so that the material is kneaded until it can Extruded on extruder. Put the kneaded material into the extruder to extrude strips to obtain strips; put the strips into an electric oven for drying, the temperature is controlled at 80-120°C; the dried strips are broken and sieved , and put into a muffle furnace for co-calcination, the calcination temperature is 500 ℃, and the calcination time is 2 hours, to obtain the titanium silicon carrier. The titanium silica carrier has a hygroscopicity of 34%.

[0067] Weigh 3.88g of cobalt nitrate, 60.08g of ammonium molybdate, and 11.74g of potassium carbonate into a 250ml beaker, add deionized water to the 100ml scale, heat slightly on an electric furnace to 45-55°C to dissolve all the additions, and di...

Embodiment 2

[0072] Weigh and pulverize standby titanium silicon powder (TiO 2 / SiO 2 =3:1 solid content 82%) 105.12g, hydroxypropyl methylcellulose (CMC) 1g, methyl cyanine powder 2.5g, polyethylene oxide (PEO) 0.5g are put into the kneader, start the kneader and add A certain amount of deionized water is used to knead the material until it can be extruded on the extruder. Put the kneaded material into the extrusion machine to extrude strips to obtain strips; put the strips into an electric oven for drying, the temperature is controlled at 80-120°C; the dried strips are broken and sieved , and put into a muffle furnace for co-calcination, the calcination temperature is 500 ℃, and the calcination time is 2 hours, to obtain the titanium silicon carrier. The titanium silica support is 30% hygroscopic.

[0073] Weigh 3.11g of cobalt nitrate, 51.49g of ammonium molybdate, 4.89g of nickel nitrate, and 7.34g of potassium carbonate into a 250ml beaker, add deionized water to the 100ml scale, h...

Embodiment 3

[0079] Weigh titanium silicon powder (TiO 2 / SiO 2 =3:1 (solid content 82%) 103.41g, hydroxypropyl methylcellulose (CMC) 1g, methylene cyanine powder 2.5g, glycerin 0.5g put into the kneader, start the kneader and add a certain amount of deionized water , so that the material is kneaded until it can be extruded on the extruder. Put the kneaded material into the extrusion machine to extrude strips to obtain strips; put the strips into an electric oven for drying, the temperature is controlled at 80-120°C; the dried strips are broken and sieved , and put into a muffle furnace for co-calcination, the calcination temperature is 500 ℃, and the calcination time is 2 hours, to obtain the titanium silicon carrier. The titanium silica carrier has a hygroscopicity of 42%.

[0080] Weigh 4.66g of cobalt nitrate, 68.66g of ammonium molybdate, and 8.80g of potassium carbonate into a 250ml beaker, add deionized water to the 100ml mark, heat slightly on the electric furnace to 45-55°C to ...

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Abstract

The invention discloses a titanium-based shift catalyst as well as a preparation method and application thereof. The titanium-based shift catalyst comprises 0.8-1.5% of CoO, 6-8% of MoO3, 5-8% of K2O,0-7% of CeO2 and the balance being TiO2/SiO2. The novel titanium-based shift catalyst system provided by the invention has high activity at a low temperature (180-250 DEG C), and still has high activity and stability at a high temperature (250-450 DEG C). According to the preparation method, TiO2/SiO2 is used as a carrier of the titanium-based shift catalyst, so that the vulcanization state of TiO2/SiO2 can be kept, and the occurrence of reverse vulcanization can be avoided; a relatively high hydrolysis function is achieved on poison HCN, COS and CS2; the structural stability of the catalystis improved, and long-life operation is facilitated.

Description

technical field [0001] The invention relates to the field of carbon monoxide catalysts, in particular to a titanium-based shift catalyst and its preparation method and application. Background technique [0002] The carbon monoxide shift reaction refers to the generation of hydrogen and carbon dioxide from carbon monoxide and water vapor under the action of a catalyst. The catalyst is suitable for the conversion process of heavy oil, residual oil partial oxidation or coal gasification to promote the conversion reaction of CO in sulfur-containing gas. CO sulfur-tolerant shift catalyst with process gas sulfur content ≥ 0.1% (v / v)) and high water-gas ratio (0.3-1.6). [0003] At present, carbon monoxide shift catalysts can be divided into three categories: (1) Cu-Zn type, this type of catalyst has high activity at low temperature (180-250°C), but it is easy to lose activity at high temperature; and it is easy to be poisoned by sulfide in the raw gas , short service life. (2) ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J21/08B01J32/00B01J23/882B01J23/887B01J37/02B01D53/86B01D53/62
CPCB01D53/864B01J21/08B01J23/002B01J23/882B01J23/8872B01J37/0201B01J2523/00B01J2523/13B01J2523/41B01J2523/47B01J2523/68B01J2523/845B01J2523/847B01J2523/3712Y02A50/20
Inventor 沈炳龙沈雁军沈雁鸣沈雁来
Owner SANLONG CATALYST
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