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Reaction system for quickly evaluating Claus unit tail gas hydrodesulphurization catalyst

A Claus tail gas and hydrodesulfurization technology, applied in the field of chemical research and chemical equipment, can solve the problems of low efficiency, long evaluation period, unfavorable catalyst development and research, etc., and achieves strong versatility, fast evaluation speed, and economical The effect of cost and space

Inactive Publication Date: 2008-12-24
WUHAN UNIV OF TECH
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

However, the traditional fixed-bed reactor is a unit reactor, which has low efficiency and long evaluation period, which is not conducive to the development and research of catalysts.

Method used

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  • Reaction system for quickly evaluating Claus unit tail gas hydrodesulphurization catalyst

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] Example 1: SO of Claus Tail Gas Hydrodesulfurization Catalyst 2 Hydrogenation activity evaluation

[0030] A parallel reactor consisting of three fixed-bed reactors 7 connected in parallel, each made of quartz glass tubes with a length of 60 cm and an inner diameter of 8 mm; and three flowmeters 5 (5a, 5b, 5c). Weigh 1 g of each of the three nickel-based catalysts used for Claus tail gas hydrodesulfurization, and place them in the middle constant temperature zones of the three reactors, and fill the top and bottom of the three reactors with inert quartz with a particle size of 20 to 40 mesh sand. Contains H 2After passing through the splitter, the mixed gas of S flows into three reactors at a rate of 15mL / min controlled by flow meters 5a, 5b, and 5c, and is pre-cured at 400°C for 2h. After the vulcanization is completed, the mixed gas 2 for hydrogenation reaction is passed into the three reactors at the flow rate of 50ml / min, 300ml / min, and 800ml / min respectively, an...

Embodiment 2

[0031] Example 2: CS of Claus Tail Gas Hydrodesulfurization Catalyst 2 Hydrolytic activity evaluation

[0032] A parallel reactor consisting of two fixed-bed reactors 7 connected in parallel, each made of quartz glass tubes with a length of 60 cm and an inner diameter of 8 mm; and two flowmeters 5 (5a, 5b). Weigh 1 g of each of the two cobalt-molybdenum catalysts used for the hydrodesulfurization of Claus tail gas, and place them in the middle constant temperature zones of the two reactors respectively. The top and bottom of the two reactors are filled with inert quartz with a particle size of 20 to 40 mesh sand. Contains H 2 After passing through the splitter, the mixed gas of S flows into two reactors at a rate of 15mL / min controlled by flow meters 5a and 5b, and is pre-cured at 400°C for 2h. After the vulcanization is over, the CS-containing catalyst used to investigate the hydrolysis activity of the catalyst is passed into the two reactors at a flow rate of 100ml / min. ...

Embodiment 3

[0033] Example 3: SO of Claus Tail Gas Hydrodesulfurization Catalyst 2 Hydrogenation activity and CS 2 Simultaneous evaluation of hydrolytic activity

[0034] A parallel reactor consisting of five fixed-bed reactors 7 connected in parallel, each made of quartz glass tubes with a length of 60 cm and an inner diameter of 8 mm; and five flowmeters 5 (5a, 5b, 5c, 5d, 5e). Weigh 1g each of 5 kinds of nickel-based catalysts used for Claus tail gas hydrodesulfurization, and place them in the middle constant temperature zones of the 5 reactors respectively. The top and bottom of the 5 reactors are filled with inert quartz with a particle size of 20-40 mesh sand. Contains H 2 After passing through the splitter, the mixed gas of S flows into five reactors at a rate of 15mL / min controlled by flow meters 5a, 5b, 5c, 5d, and 5e, and is pre-cured at 400°C for 2h. After the vulcanization is finished, pass into the reactors connected with the flowmeters 5a and 5b at the flow rate of 50ml / ...

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Abstract

The present invention provides a Claus unit tail gas hydrodesulphurization catalyst fast evaluation reaction system which consists of an air distributing device, a multicenter reaction device and a tail gas detecting and processing device, wherein, the air distributing device consists of an air source, a current divider, a drying pipe (4), a flowmeter (5), a constant flow pump (8) and a preheater (9) which are connected by a pipeline; the multicenter reaction device is a parallel reactor consisting of a plurality of fixed bed reactors (7) in parallel connection; the front end of each reactor is connected with the flowmeter by a pipeline with a valve; the tail end is connected with the tail gas detecting and processing device by the pipeline with the valve, and the reaction temperature of each reactor can be controlled independently by a program temperature controller. The present invention uses the same air source and the parallel operation of a plurality of fixed bed reactors (7) to realize the fast evaluation on the sulfur dioxide hydrogenation activity and / or the organic sulfur hydrolysis activity of the Claus unit tail gas hydrodesulphurization catalyst.

Description

technical field [0001] The invention relates to chemical research and chemical equipment, in particular to a multi-functional reaction system for rapid evaluation of Claus (Claus) tail gas hydrogenation desulfurization catalyst. Background technique [0002] The newly built domestic petroleum refining industrial tail gas desulfurization devices generally adopt the Claus + SCOT process. In this process, the tail gas of the Claus reaction (the sulfur-containing gas is mainly H 2 S, SO 2 And COS, CS 2 , S x ) through catalytic hydrogenation to convert most of the sulfur-containing compounds into H 2 S and then return to the Claus device for cyclic conversion. The performance evaluation of Claus tail gas hydrodesulfurization catalysts is generally completed in a fixed-bed reactor. The catalyst needs to be presulfurized first, and then desulfurized by hydrogenation reaction, so it takes a long time to screen the catalyst and optimize the reaction conditions. However, the t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J8/04
Inventor 雷家珩钱菁方伟杜小弟
Owner WUHAN UNIV OF TECH
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