Dehydrogenation reaction reactor, method for preparing same and application of dehydrogenation reaction reactor

A reactor and reaction technology, applied in the direction of chemical instruments and methods, hydrocarbons, hydrocarbons, etc., can solve the problems of high cost, expensive palladium metal, etc., achieve stable properties, reduce reaction temperature, improve conversion efficiency and selective effect

Active Publication Date: 2019-05-14
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there are still some problems in the palladium membrane hydrogen separation reactor. First, palladium metal is expensive and the cost is relatively high; in addition, the palladium membrane needs to choose a suitable preparation technology and support to enhance the anchoring effect between the membrane and the support and improve Membrane thermal cycle stability

Method used

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  • Dehydrogenation reaction reactor, method for preparing same and application of dehydrogenation reaction reactor
  • Dehydrogenation reaction reactor, method for preparing same and application of dehydrogenation reaction reactor
  • Dehydrogenation reaction reactor, method for preparing same and application of dehydrogenation reaction reactor

Examples

Experimental program
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Effect test

Embodiment 1

[0037] Preparation of metal-organic framework materials: 0.5g (1.68mmol) Zn(NO 3 ) 2 ·6H 2O and 1 g (12 mmol) of 2-methylimidazole (2-methylimidazole) were dissolved in a mixed solution consisting of 50 mL of deionized water and 50 mL of methanol. The beaker was placed in an ultrasonic instrument, sonicated at 80 °C for 24 h, then washed with methanol and dried at 80 °C for 3 h to prepare ZnO-MOFs.

[0038] Pretreatment of porous metal tubes: 316L porous stainless steel tubes (outer diameter 10 mm, wall thickness 1 mm, average pore diameter 1 μm, porosity 35%, wire-cut processing into 2 cm long segments) were sequentially treated with sodium hydroxide solution and dilute nitric acid solution Wash, then wash with deionized water until neutral, finally wash with absolute ethanol, and dry for later use.

[0039] 2 g of ZnO-MOFs was dissolved in 10 mL of water to prepare ZnO-MOFs slurry, and the pretreated porous stainless steel tube was immersed in the ZnO-MOFs slurry. The imm...

Embodiment 2

[0041] The pretreatment of the porous metal tube is the same as in Example 1.

[0042] Prepare 15mL 0.1M zinc nitrate solution and 15mL 0.1M hexamethylenetetramine solution respectively, mix the zinc nitrate solution and the hexamethylenetetramine solution, and transfer the resulting mixed solution into a hydrothermal kettle. The porous stainless steel tube was inserted into the mixed solution, hydrothermally reacted at 95° C. for 2 hours, taken out, and dried naturally to obtain a porous stainless steel tube with zinc oxide nanorod arrays grown on the surface. The weight of the porous metal tube before and after the reaction can be obtained to obtain the mass of the ZnO nanorod array grown on the surface of the porous stainless steel tube.

[0043] 0.2g (2.4mmol) 2-methylimidazole (2-methylimidazole) is dissolved in 25ml dimethylformamide (DMF) solution, puts into polytetrafluoroethylene hydrothermal kettle, and zinc oxide is grown on the surface The porous stainless steel t...

Embodiment 3

[0045] The two ends of the reactor for the dehydrogenation reaction prepared in Example 1 were respectively welded together with a stainless steel tube with an outer diameter of 10 mm and a wall thickness of 1 mm to serve as a reactor for the propane dehydrogenation catalytic reaction. Add 0.5g of Pt catalyst into the reactor. Before the reaction evaluation starts, the Pt catalyst is pretreated. The pretreatment conditions are as follows: the temperature is raised to 300-600°C at a heating rate of 5°C / min, and the reduction pretreatment is carried out in a hydrogen atmosphere for 2 hours. Afterwards, the temperature was raised to the reaction temperature in a hydrogen atmosphere, and the raw material gas was added, and the reaction was carried out under normal pressure. Raw gas ratio C 3 h 8 :H 2 =1:4 (volume ratio), the hourly space velocity of propane liquid is 3.0h -1 , Propane dehydrogenation reaction temperature: 600 ° C, when the catalyst index reaches a steady state,...

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Abstract

The invention provides a dehydrogenation reaction reactor which comprises porous metal pipes and metal organic framework membrane materials. The metal organic framework membrane materials are loaded on the porous metal pipes. The dehydrogenation reaction reactor can be prepared by the aid impregnation and coating processes or in-situ growth processes. The dehydrogenation reaction reactor has the advantages that the dehydrogenation reaction reactor can be applied to dehydrogenation reaction, accordingly, generated hydrogen can be transferred from reaction sides, accordingly, reaction can move towards the direction favorable for dehydrogenation, the dehydrogenation reaction reactor is favorable for the dehydrogenation reaction, the conversion efficiency and the selectivity can be improved toa certain extent, and the reaction temperatures can be lowered.

Description

technical field [0001] The invention relates to the technical field of hydrogen separation, and relates to a reactor for dehydrogenation reaction and a preparation method and application thereof. Background technique [0002] Gas membrane separation is a green technology with advantages such as high separation efficiency, low energy consumption, and simple operation. Inorganic membranes can be divided into dense membranes and porous membranes according to the surface structure. Porous membranes can greatly reduce membrane cost and improve gas permeability compared to dense membranes. At the same time, since the porous inorganic membrane has better high temperature stability, integrating it with the catalytic reaction to form a membrane catalytic reactor will improve the conversion efficiency and selectivity of the catalytic reaction by improving the reaction kinetics and inhibiting the occurrence of side reactions. [0003] Membrane separation and recovery of hydrogen has ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J31/26C07C5/333C07C11/06B01D71/06B01D67/00B01D69/02
CPCY02P20/52
Inventor 冯英杰冯静张明森姜健准刘东兵
Owner CHINA PETROLEUM & CHEM CORP
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