Step-by-step sulfuration method of sulfur tolerant shift catalyst

A sulfur-resistant conversion and catalyst technology, which is applied in the direction of catalyst activation/preparation, chemical instruments and methods, physical/chemical process catalysts, etc., can solve the problems of high cost and long vulcanization time, so as to reduce the total time, improve the vulcanization effect, Effect of reducing vulcanization cost

Active Publication Date: 2015-05-20
CHINA PETROLEUM & CHEM CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The vulcanization belongs to the conventional online process gas vulcanization, which takes a long time and costs a lot

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] 50,000m 3 / h Hydrogen production capacity Coal gasification unit A, the conversion system cobalt-molybdenum series sulfur-resistant shift catalyst loading capacity 128m 3 . After replacing the sulfur-resistant shift catalyst in 2011, due to the failure of the heating furnace, the method of the present invention was used for vulcanization. The temperature of the catalyst bed is raised. After the temperature reaches 215°C, the temperature is kept constant for 3 hours, and the medium and low temperature pre-sulfurization is carried out; before the vulcanization starts, the internal vulcanization pressure of the controller is 1.0MPa, and the air velocity of the circulating gas is 600h.-1 , add hydrogen to nitrogen (volume ratio: hydrogen: nitrogen = 1:9) together with nitrogen into the start-up furnace for heating; using CS 2 As a vulcanization medium for vulcanization, the vulcanizing agent is slowly added in a small amount and multiple times; and the temperature rise rat...

Embodiment 2

[0027] 450ktNH 3 / a device B, the shift system cobalt-molybdenum series sulfur-tolerant shift catalyst has a total loading capacity of 158m 3 . After replacing the sulfur-tolerant shift catalyst at the beginning of 2012, when there was a shortage of high-pressure steam and it was impossible to heat-exchange and raise the temperature, vulcanization was carried out according to the method of the present invention. During medium and low temperature pre-sulfurization, the temperature of the catalyst bed is raised. After the temperature reaches 200°C, keep the temperature constant for 5 hours to perform medium-low temperature pre-sulfurization; -1 , add hydrogen to nitrogen (volume ratio: hydrogen: nitrogen = 1:4) together with nitrogen into the start-up furnace for heating; using CS 2 As a vulcanization medium for vulcanization, the vulcanizing agent is slowly added in a small amount and multiple times; and the temperature rise rate of the catalyst bed is controlled at 40~50°C / h...

Embodiment 3

[0030] 300ktNH 3 / a device C, the shift system cobalt-molybdenum series sulfur-tolerant shift catalyst has a total loading capacity of 88m 3 . After replacing the sulfur-resistant conversion catalyst in 2011, due to the failure of the electric heater, the heating power decreased, and the vulcanization was carried out according to the method of the present invention. During medium and low temperature vulcanization, the temperature of the catalyst bed is raised. After the temperature reaches 220°C, keep the temperature constant for 2 hours to perform medium and low temperature pre-sulfurization; -1 , add hydrogen to nitrogen (volume ratio: hydrogen: nitrogen = 1:99) together with nitrogen into the start-up furnace for heating; using CS 2 As a vulcanization medium for vulcanization, the vulcanizing agent is slowly added in a small amount and multiple times; and the temperature rise rate of the catalyst bed is controlled at 95~100°C / h by controlling the amount of vulcanizing age...

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Abstract

The invention discloses a step-by-step sulfuration method of a sulfur tolerant shift catalyst, belongs to the technical field of pre-sulfuration treatment of a carbon monoxide sulfur tolerant shift catalyst, and particularly relates to a method for rapidly sulfurating a cobalt-molybdenum series sulfur tolerant shift catalyst. Specific to the condition of insufficient sulfuration condition after a new up-conversion device or old device is reconstructed at present, particularly less warming means, a step-by-step sulfuration method is adopted, namely, a method of rapid pre-sulfuration in a medium-low temperature device and online medium-high temperature short-time intense sulfuration is adopted, thus the sulfuration time is shortened, the sulfuration cost is lowered, and the sulfuration effect achieves a sulfuration effect of a conventional catalyst.

Description

technical field [0001] The invention discloses a step-by-step vulcanization method for a sulfur-resistant shift catalyst, which belongs to the technical field of presulfurization treatment of a carbon monoxide sulfur-resistant shift catalyst, and specifically relates to a method for performing rapid vulcanization treatment on a cobalt-molybdenum-based sulfur-resistant shift catalyst. Background technique [0002] Sulfur-tolerant shift catalysts have been successfully applied in the fertilizer industry and have achieved remarkable economic benefits. Most of the sulfur-tolerant shift catalysts use Co-Mo metal elements as active components, which are dispersed in Al in an oxidized state. 2 o 3 、Al 2 o 3 +Re 2 o 3 (Re stands for rare earth elements) and other porous carriers, it has the characteristics of wide temperature range, high conversion activity, and no sulfur poisoning problem. It has been paid attention to by everyone since its development. The newly produced cat...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J37/20B01J23/883B01J23/887
Inventor 白志敏余汉涛齐焕东赵庆鲁郭建学田兆明陈依屏王昊姜建波李文柱郭杰王敏
Owner CHINA PETROLEUM & CHEM CORP
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