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Refinery waste gas desulfurizer, preparation method and applications thereof

A waste gas desulfurization and refinery technology, applied in the field of multi-functional desulfurizers and desulfurizers, can solve the problems of one-time removal of sulfides, unusability, etc., and achieve the effects of enhancing stability, enhancing adsorption, and increasing adsorption capacity.

Active Publication Date: 2015-12-09
SHENYANG SANJUKAITE CATALYST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The present invention solves the defect that the desulfurizer in the prior art cannot be used for one-time removal of sulfide in refinery waste gas because it can only remove one or two kinds of sulfide, and then provides a desulfurizer that can simultaneously desulfurize A desulfurizer with large sulfur capacity and high precision for removing hydrogen sulfide, mercaptan, sulfide, disulfide, carbonyl sulfide and other sulfides in refinery waste gas, its preparation method and application

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] The preparation method of refinery waste gas desulfurizer described in the present embodiment comprises the steps:

[0029] (1) 25wt% ammoniacal liquor 72g is dissolved in 360ml dehydrated alcohol, forms the alcoholic solution of ammonia; Take by weighing 200g apricot shell gac, its specific surface area is 810m 2 / g, the pore volume is 0.51ml / g, and the pore diameter is 2.1nm. Add activated carbon to the alcohol solution of ammonia, stir at room temperature for 5h, vacuum-dry at 120°C, and roast at 950°C for 1h under nitrogen atmosphere to obtain modified activated carbon;

[0030] (2) 9.72g copper nitrate, 11.68g nickel nitrate and 1.00g cerium nitrate are dissolved in 120ml deionized water to form a Cu-Ni-Ce composite solution; modified activated carbon is placed in the Cu-Ni-Ce composite solution, and Ultrasonic impregnation at 25°C for 2 hours, drying at 120°C for 5 hours, and calcination at 400°C for 2 hours under nitrogen atmosphere;

[0031] (3) Weigh 1.2g sulf...

Embodiment 2

[0035] (1) Dissolve 75.6g of urea in 378ml of absolute ethanol to form a nitrogen-containing alcohol solution; weigh 200g of coal-based columnar activated carbon, and its specific surface area is 920m 2 / g, the pore volume is 0.53ml / g, and the pore diameter is 2.7nm; the activated carbon is placed in a nitrogen-containing alcohol solution, stirred at room temperature for 5h, then vacuum-dried at 120°C, and roasted at 950°C for 1h under a nitrogen atmosphere to obtain modified activated carbon ;

[0036] (2) 19.44g copper nitrate, 15.57g nickel nitrate and 2.52g cerium nitrate are dissolved in 126ml deionized water to form a Cu-Ni-Ce composite solution; modified activated carbon is placed in the Cu-Ni-Ce composite solution, and Ultrasonic impregnation at 25°C for 6 hours, drying at 120°C for 5 hours, and calcination at 500°C for 4 hours under nitrogen atmosphere;

[0037] (3) Take by weighing 2.34g sulfonated cobalt phthalocyanine and N,N-dimethylformamide 3.78g, be all dissol...

Embodiment 3

[0041] (1) Dissolve 81.6g of melamine in 408ml of ethanol to form a nitrogen-containing alcoholic solution; weigh 200g of wooden columnar activated carbon, and its specific surface area is 1090m 2 / g, the pore volume is 0.74ml / g, the pore diameter is 2.3nm, the activated carbon is placed in nitrogen-containing alcohol solution, stirred at room temperature for 5h, then vacuum-dried at 120°C, and roasted at 950°C for 1h under nitrogen atmosphere to obtain modified activated carbon ;

[0042] (2) 38.88 g of copper nitrate, 23.36 g of nickel nitrate and 4.04 g of cerium nitrate are dissolved in 136 ml of deionized water to form a Cu-Ni-Ce composite solution; ℃ ultrasonic impregnation for 8 hours, drying at 120℃ for 5 hours, and roasting at 600℃ for 6 hours under nitrogen atmosphere;

[0043] (3) 2.88g of quaternary ammonium alkalized cobalt phthalocyanine and 4.08g of dimethyl sulfoxide are dissolved in 408ml of 5wt% ammonia water to form a cobalt-containing impregnation solution...

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PUM

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Abstract

The invention provides a refinery waste gas desulfurizer, a preparation method and applications thereof. The desulfurizer is composed of the following components in percentage by weight: 1.6 to 6.4 wt% of CuO, 1 to 3 wt% of NiO, 0.2 to 0.8 wt% of CeO2, 0.1 to 0.5 wt% of cobalt phthalocyanine substance, and the balance being active carbon, which has been processed by nitrogen-containing compounds. The active carbon is modified by nitrogen-containing compounds, the alkali property and polarity of active carbon surface are both improved, and thus the absorbing performance of active carbon on acidic sulfides is enhanced. Then oxides of copper, nickel, and cerium are loaded on the modified active carbon so as to further improve the alkali property of the active carbon surface. Finally cobalt phthalocyanine is loaded on the active carbon and is capable of oxidizing mercaptan in the refinery waste gas into corresponding disulfides, which can be absorbed by active carbon. So the prepared desulfurizer can efficiently absorb and remove sulfides such as hydrogen sulfide, carbonyl sulfide, thioether, mercaptan, disulfides, and the like in the refinery waste gas in one time. The total sulfur concentration in the outlet is less than 2 mg / m3. The breakthrough sulfur capacity can reach 32% or more.

Description

technical field [0001] The invention relates to a desulfurizer, its preparation method and application, in particular to a multifunctional desulfurizer suitable for refinery waste gas, its preparation method and application, and belongs to the field of desulfurization purification. Background technique [0002] With the aggravation of the trend of heavy crude oil, high-sulfur crude oil has become the main raw material of most refineries in my country, resulting in a serious excess of sulfur content in refinery exhaust gas, causing great damage to the environment. Therefore, how to solve the sulfide in the refinery exhaust gas is an urgent problem that the petrochemical industry needs to solve. [0003] Refinery waste gas is mainly distributed in sulfur recovery units, sewage stripping units, atmospheric and vacuum units, desulfurization units, coking units, oil tank farms and vehicle loading facilities. The sulfides in refinery exhaust gas mainly include hydrogen sulfide, l...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D53/81B01D53/48
Inventor 蔡大妮赵素云张婷单红飞许灵瑞
Owner SHENYANG SANJUKAITE CATALYST
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