Ag2O@Ti-Ce-O difunctional catalytic adsorption desulfurizer, and preparation method and application thereof

A dual-function catalysis and adsorption desulfurization technology, applied in the field of desulfurizers, can solve the problems of further improvement of desulfurization efficiency, low efficiency of adsorbent recycling, hindering technical industrial application, etc., and achieves excellent fuel oil deep desulfurization effect and good industrial application. The effect of foreground, high cycle stability

Active Publication Date: 2017-03-15
PETROCHINA CO LTD +1
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Problems solved by technology

[0003] At present, the gasoline desulfurization technology commonly used in refineries is hydrodesulfurization. Its problem is that hydrodesulfurization needs to be carried out at a relatively high reaction temperature (300-400°C) and pressure (3-6MPa), which requires a large amount of energy. Hydrogen, high energy consumption (Song, C.S. An Overview of New Approaches to Deep Desulfurization for Ultra-clean Gasoline, Diesel Fuel and Jet Fuel. Catal. Today 2003, 86, 211-263)
However, the desulfurization efficiency of this material needs to be further improved
At the same time, the low recycling efficiency of the adsorbent (decreased desulfurization performance after material regeneration) is also a bottleneck hindering the application of technical chemical industry

Method used

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  • Ag2O@Ti-Ce-O difunctional catalytic adsorption desulfurizer, and preparation method and application thereof
  • Ag2O@Ti-Ce-O difunctional catalytic adsorption desulfurizer, and preparation method and application thereof
  • Ag2O@Ti-Ce-O difunctional catalytic adsorption desulfurizer, and preparation method and application thereof

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Experimental program
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Embodiment 1

[0032] This embodiment provides an Ag 2 O@Ti-Ce-O bifunctional catalytic adsorption desulfurizer, which is prepared by the following steps:

[0033] (1) The precursors of Ti and Ce, titanium oxysulfate and ammonium cerium nitrate, are divided into TiO 2 / CeO 2The molar ratio is 1:9, mixed in the urea solution with a concentration of 40g / L, and magnetically stirred until completely dissolved to obtain a mixed solution of titanium cerium precursor;

[0034] (2) Heat the titanium-cerium precursor mixed solution to 90-95°C in a water bath, then stir and react at a constant temperature for 6 hours, filter the obtained gel, wash with water, dry, and calcinate at 400°C for 4 hours in an air atmosphere to obtain Ti-Ce -O base material;

[0035] (3) Uniformly load the silver nitrate solution on the Ti-Ce-O base material according to the silver loading amount of 5wt.%, dry, grind, and calcinate at 400 ° C in the air atmosphere to obtain Ag 2 O@Ti-Ce-O bifunctional catalytic adsorpti...

Embodiment 2

[0038] This embodiment provides an Ag 2 O@Ti-Ce-O bifunctional catalytic adsorption desulfurizer, which is prepared by the following steps:

[0039] (1) The precursors of Ti and Ce, titanium oxysulfate and ammonium cerium nitrate, are divided into TiO 2 / CeO 2 The molar ratio is 1:1, mixed in the urea solution with a concentration of 60g / L, and magnetically stirred until completely dissolved to obtain a mixed solution of titanium cerium precursor;

[0040] (2) Heat the titanium-cerium precursor mixed solution to 90-95°C in a water bath, then stir and react at a constant temperature for 6 hours, filter the obtained gel, wash with water, dry, and calcinate at 400°C for 4 hours in an air atmosphere to obtain Ti-Ce -O base material;

[0041] (3) Uniformly load the silver nitrate solution on the Ti-Ce-O base material according to the silver loading amount of 10wt.%, dry, grind, and calcinate at 400 ° C in the air atmosphere to obtain Ag 2 O@Ti-Ce-O bifunctional catalytic adsorp...

Embodiment 3

[0044] This embodiment provides an Ag 2 O@Ti-Ce-O bifunctional catalytic adsorption desulfurizer, which is prepared by the following steps:

[0045] (1) The precursors of Ti and Ce, titanium oxysulfate and ammonium cerium nitrate, are divided into TiO 2 / CeO 2 The molar ratio is 5:1, mixed in the urea solution with a concentration of 80g / L, and magnetically stirred until completely dissolved to obtain a mixed solution of titanium cerium precursor;

[0046] (2) Heat the titanium-cerium precursor mixed solution to 90-95°C in a water bath, then stir and react at a constant temperature for 6 hours, filter the obtained gel, wash with water, dry, and calcinate at 400°C for 4 hours in an air atmosphere to obtain Ti-Ce -O base material;

[0047] (3) Uniformly load the silver nitrate solution on the Ti-Ce-O base material according to the silver loading amount of 15wt.%, dry, grind, and calcinate at 400 ° C in the air atmosphere to obtain Ag 2 O@Ti-Ce-O bifunctional catalytic adsorp...

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Abstract

The invention relates to an Ag2O@Ti-Ce-O difunctional catalytic adsorption desulfurizer, and a preparation method and application thereof. The preparation method comprises the following steps: (1) adding a precursor of Ti and Ce into a urea solution and carrying out stirring until the precursor is completely dissolved so as to obtain a mixed solution, wherein a mol ratio of Ti to Ce in the precursor of Ti and Ce is 1: 9 to 9: 1; (2) heating the mixed solution, then carrying out isothermal stirring for a reaction and subjecting obtained gel to filtering, washing, drying and calcining in the air successively so as to obtain a Ti-Ce-O substrate material; and (3) with the loading amount of silver of 5 to 20 wt.%, uniformly loading a silver nitrate solution on the Ti-Ce-O substrate material by using an equivalent-volume impregnation method, and successively carrying out drying, grinding and calcining in the air so as to obtain the Ag2O@Ti-Ce-O difunctional catalytic adsorption desulfurizer. The Ag2O@Ti-Ce-O difunctional catalytic adsorption desulfurizer has improved desulphurization efficiency and cycle usage stability.

Description

technical field [0001] The invention relates to a desulfurizer, in particular to a stable and efficient Ag 2 O@Ti-Ce-O bifunctional catalytic adsorption desulfurizer. Background technique [0002] The acceleration of the modernization process of human society has led to a rapid increase in vehicle fuel consumption. In 2000, my country's vehicle fuel consumption was 7,000 tons, which increased to 130 million tons in 2010, and is expected to reach 370 million tons in 2020. Sulfur-containing fuels inevitably emit a large amount of sulfide to the environment during the combustion process, which promotes the formation of acid rain and the emission of particulate matter, which seriously threatens the living environment of human beings. For this reason, countries around the world have successively formulated strict fuel sulfur standards, and the production of ultra-clean fuel has become one of the key issues in the research of the petrochemical industry. [0003] At present, the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/66C10G25/00
CPCB01J23/002B01J23/66B01J2523/00C10G25/003C10G2300/202C10G2300/70B01J2523/18B01J2523/3712B01J2523/47
Inventor 肖静兰玲李忠叶飞燕
Owner PETROCHINA CO LTD
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