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A dual-functional catalyst for deoxygenation and organic sulfur hydrogenation conversion and its preparation and application

A dual-function catalyst and hydrogenation conversion technology, which is applied in the field of gas purification, can solve the problems of destroying the activity of hydrogenation catalysts, easy poisoning of deoxidation catalysts, long purification process, etc., and achieves high organic sulfur hydrogenation conversion rate, simple preparation method, The effect of high deoxidation rate

Active Publication Date: 2017-10-13
HAO HUA CHENGDU TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Some industrial tail gases contain a certain amount of oxygen, such as coke oven gas, calcium carbide furnace gas, refinery gas, etc. The oxygen content is usually between 0.3-2%. The presence of oxygen will destroy the activity of the hydrogenation catalyst and cause its sulfation , and the presence of sulfur makes traditional deoxygenation catalysts easily poisoned
[0004] At present, in the purification process of various sulfur-containing and CO-containing water gas, semi-water gas, coke oven gas, calcium carbide furnace gas and other gases in the industry, the process is divided into deoxidation process and multi-stage hydrogenation and fine desulfurization process. The purification process is very long. high processing cost

Method used

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  • A dual-functional catalyst for deoxygenation and organic sulfur hydrogenation conversion and its preparation and application
  • A dual-functional catalyst for deoxygenation and organic sulfur hydrogenation conversion and its preparation and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Present embodiment catalyst comprises the component of following mass parts:

[0029] 1 part of active component, 20 parts of active auxiliary agent, and 79 parts of carrier, wherein the active ingredient is molybdenum and nickel, the active auxiliary agent is phosphorus, and the carrier is ZrO 2 The number of parts by mass is 5 parts, and the catalyst number of this embodiment is D-01.

[0030] The preparation method of present embodiment catalyst is as follows:

[0031] 1) 13.8g Zr(NO 3 ) 4 ·5H 2 O is mixed with 74.5g of alumina powder, fully ground in a mortar for 2 hours, and then fired at 300°C for 24 hours to obtain ZrO 2 -Al 2 o 3 carrier;

[0032] 2) Add 0.6g (NH 4 ) 6 Mo 7 o 24 4H 2 O, 1.9g Ni(NO 3 ) 2. 6H 2 O and 37.2g (NH 4 )2 HPO 4 Dissolve in 100g of water to make a mixture;

[0033] 3) Mix the carrier prepared in step 1) with the mixed solution in step 2), knead fully, press into a sheet with a diameter of 2mm, dry at 120°C for 2 hours, a...

Embodiment 2

[0035] Present embodiment catalyst comprises the component of following mass parts:

[0036] 50 parts of active components, 0.1 part of active auxiliary agent, 49.9 parts of carrier, wherein the active ingredient is molybdenum, nickel, iron and cobalt, the active auxiliary agent is fluorine, and the carrier is TiO 2 The number of parts by mass is 50 parts, and the catalyst number of this embodiment is D-02.

[0037] The preparation method of present embodiment catalyst is as follows:

[0038] 1) Mix 58.2g TiCl with 40g pseudo-boehmite powder, fully grind in a ball mill for 8 hours, and then roast at 600°C for 4 hours to obtain TiO 2 -Al 2 o 3 carrier;

[0039] 2) Add 1g MoO 3 , 1g Fe 2 o 3 , 95.1g Co(NO 3 ) 2. 6H 2 O, 81g Ni(CH 3 COO) 2 4H 2 O and 0.2g NaF were dissolved in 100g water to make a mixed solution;

[0040] 3) Mix the carrier prepared in step 1) with the mixed solution in step 2), knead fully, extrude into strips with a diameter of 2mm, dry at 100°C f...

Embodiment 3

[0042] Present embodiment catalyst comprises the component of following mass parts:

[0043] 30 parts of active component, 1 part of active auxiliary agent, 69 parts of carrier, wherein the active ingredient is molybdenum, nickel and iron, active auxiliary agent is phosphorus and fluorine, ZrO in the carrier 2 The number of parts by mass is 30 parts, and the catalyst number of this embodiment is D-03.

[0044] The preparation method of present embodiment catalyst is as follows:

[0045] 1) 39.2g ZrCl 4 Dissolve in 100g of water, then immerse 48.3g of alumina pellets into the prepared zirconium salt solution, soak at room temperature for 4 hours, dry at 120°C for 2 hours, and roast at 300°C for 6 hours to obtain ZrO 2 -Al 2 o 3 carrier;

[0046] 2) 24.5g (NH 4 ) 6 Mo 7 o 24 4H 2 O, 8.4g NiCO 3 2Ni(OH) 2 4H 2 O, 25.3g Fe(NO 3 ) 3 .9H 2 O and 1.4g H 3 PO 4 Dissolve in 100g of water to make a mixed dipping solution;

[0047] 3) Immerse the carrier prepared in st...

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Abstract

The invention relates to a dual-functional catalyst for deoxidation and organic sulfur hydrogenation conversion and its preparation and application, belonging to the technical field of gas purification. The catalyst includes the following components in parts by mass in terms of oxides: 1-50 parts of active components, 0.1-20 parts of active auxiliary agents, and 30-89.1 parts of carriers. The present invention also relates to three preparation methods of the catalyst. The catalyst of the present invention has dual functions of deoxidation and hydrogenation conversion of organic sulfur, and can be used in the purification process of raw material gases such as industrial coal water gas, semi-water gas, coke oven gas, and calcium carbide furnace gas containing sulfur, CO, and H2. The catalyst of the invention can simultaneously realize the purposes of deoxidation and hydrogenation conversion of organic sulfur, shorten the technological process, simplify the process, reduce energy consumption and save cost. The preparation method of the catalyst of the invention is simple, has strong operability and requires low preparation conditions. The catalyst of the invention has high deoxidation rate and high organic sulfur hydrogenation conversion rate, the oxygen volume content of the product obtained after deoxidation is lower than 100ppm, and the organic sulfur conversion rate is greater than 95%.

Description

technical field [0001] The invention belongs to the field of gas purification, and in particular relates to a dual-functional catalyst for deoxidation and organic sulfur hydrogenation conversion and its preparation and application. Background technique [0002] Many industrial waste gases such as coke oven gas, calcium carbide furnace gas, yellow phosphorus tail gas, coal gas, refinery gas and other industrial gases contain a certain amount of sulfide, and the sulfur components usually include: H 2 S, COS, CS 2 , thiol, thioether, thiophene (C 4 h 4 S) etc., and the above-mentioned gas usually contains a certain amount of oxygen because of its insufficient airtightness in the production process. Taking coke oven gas as an example, the typical composition (v / v,%) of coke oven gas is: CH 4 23~26%, high hydrocarbon 2~4%, N 2 3~7%, CO 2 1.5~3%, CO 5~8%, H 2 55~60,O 2 0.3~0.8%; impurity part, H 2 S 400~800mg / Nm 3 、Organic sulfur 150~mg / Nm 3 [mainly COS (accounting...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J23/883B01J23/75B01D53/86B01D53/72
CPCY02C20/30
Inventor 陈耀壮王磊欧阳李科李洁乔莎张云贤彭颖娟雷菊梅赵英
Owner HAO HUA CHENGDU TECH
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