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A kind of vulcanization method of sulfur-resistant shift catalyst

A catalyst and catalyst bed technology, applied in catalyst activation/preparation, chemical instruments and methods, physical/chemical process catalysts, etc., can solve the problem of large fluctuations in hydrogen sulfide content at the inlet, incomplete cracking of sulfurized oil, and affecting the quality of vulcanization, etc. problem, to achieve the effect of easy control of heating rate, small heat release and simple operation

Active Publication Date: 2017-12-15
TIANJIN BOHUA YONGLI CHEM IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The problem is that the hydrogen sulfide content at the inlet fluctuates greatly during the vulcanization process, which is difficult to control and affects the vulcanization quality
The problem is that the cracking of vulcanized oil is not complete, and the vulcanization is not complete, which affects the quality of vulcanization
The problem is that the cost of vulcanization is high, it is not easy to operate, and it affects the quality of vulcanization

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] (1) Heating of the catalyst

[0033] Control the temperature rise rate of nitrogen to not exceed 50°C / h, use pure nitrogen to raise the temperature of the catalyst bed in the shift furnace to 180°C, and control the temperature difference between the upper and lower adjacent points of the catalyst bed to not exceed 100°C during the heating process;

[0034] (2) Sulfidation of the catalyst

[0035] Control the temperature rise rate of nitrogen to no more than 50°C / h, gradually increase the temperature of nitrogen to increase the temperature of the highest point of the catalyst bed to 230°C, and the temperature of the lowest point of the catalyst bed is greater than 180°C; then add hydrogen to continue to raise the temperature of the catalyst bed , the amount of hydrogen added is such that the volume ratio of hydrogen at the inlet of the shift furnace to the total amount of nitrogen and hydrogen reaches 2.5%;

[0036] When the hydrogen content is stable, start to add the ...

Embodiment 2

[0042] (1) Heating of the catalyst

[0043] Control the temperature rise rate of nitrogen to not exceed 50°C / h, use pure nitrogen to raise the temperature of the catalyst bed in the shift furnace to 180°C, and control the temperature difference between the upper and lower adjacent points of the catalyst bed to not exceed 100°C during the heating process;

[0044] (2) Sulfidation of the catalyst

[0045] Control the temperature rise rate of nitrogen to no more than 50°C / h, gradually increase the temperature of nitrogen to increase the temperature of the highest point of the catalyst bed to 230°C, and the temperature of the lowest point of the catalyst bed is greater than 180°C; then add hydrogen to continue to raise the temperature of the catalyst bed , the amount of hydrogen added is such that the volume ratio of hydrogen at the inlet of the shift furnace to the total amount of nitrogen and hydrogen reaches 2%;

[0046] When the hydrogen content is stable, start to add the by...

Embodiment 3

[0052] (1) Heating of the catalyst

[0053] Control the temperature rise rate of nitrogen to not exceed 50°C / h, use pure nitrogen to raise the temperature of the catalyst bed in the shift furnace to 180°C, and control the temperature difference between the upper and lower adjacent points of the catalyst bed to not exceed 100°C during the heating process;

[0054] (2) Sulfidation of the catalyst

[0055] Control the temperature rise rate of nitrogen to no more than 50°C / h, gradually increase the temperature of nitrogen to increase the temperature of the highest point of the catalyst bed to 230°C, and the temperature of the lowest point of the catalyst bed is greater than 180°C; then add hydrogen to continue to raise the temperature of the catalyst bed , the amount of hydrogen added is such that the volume ratio of hydrogen at the inlet of the shift furnace to the total amount of nitrogen and hydrogen reaches 3%;

[0056] When the hydrogen content is stable, start to add the by...

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Abstract

The invention discloses a method for vulcanizing a sulfur-resistant shift catalyst, which comprises the following steps: (1) raising the temperature of the catalyst; (2) vulcanizing the catalyst. The advantages of the present invention are: 1. The vulcanization operation is simple, and the heating rate is easy to control. Since the exothermic heat of the vulcanization reaction is small when acid gas is used as the vulcanizing agent, the temperature of the catalyst bed can be directly controlled by the temperature of the nitrogen gas, and the operation is simple and easy. 2. The temperature of the catalyst is easy to control when the gas is connected for the first time. Since the main components of the acid gas are N2, H2S, CO2 and other gases, they are all inert gases in the carbon monoxide shift reaction, and they will not undergo exothermic and violent hydrogenolysis reactions like CS2, so the first gas connection is not easy to occur. temperature" phenomenon.

Description

technical field [0001] The invention belongs to the field of sulfur-resistant shift catalysts, in particular to a sulfur-resistant shift catalyst vulcanization method. Background technique [0002] At present, the sulfidation method of the conversion catalyst is generally a high-sulfur gas sulfidation method or an organic sulfur hydrosulfurization method. The high-sulfur gas sulfidation method needs to provide high-sulfur gas in the previous process, which is costly. In the sulfidation process, due to the high CO content in the gas, repeated sulfidation and conversion reactions occur simultaneously, which affects the performance of the catalyst after sulfidation. The sulfuration method of organic sulfur hydrosulfurization using carbon disulfide as a vulcanizing agent is relatively common. Although this method is relatively thorough, it is difficult to control the temperature rise during vulcanization due to the large heat release of carbon disulfide hydrogenolysis reaction; ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J37/20
Inventor 蒋云龙陈胜军张卫波张魁肖克森
Owner TIANJIN BOHUA YONGLI CHEM IND
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