A method for performance evaluation of catalysts for propane dehydrogenation to propylene

A propane dehydrogenation and catalyst technology is applied in the field of chemical experiments, which can solve the problems that the catalytic reaction cannot be continuous, affect the experimental efficiency and results, and affect the reaction results, etc., so as to achieve good use effect, save test time, and improve activity and stability. Effect

Active Publication Date: 2018-10-30
XIAN CATALYST NEW MATERIALS CO LTD
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Problems solved by technology

[0005] Usually the fixed bed reaction device is the first choice to evaluate the catalyst of gas-solid phase reaction, especially the catalyst of alkane dehydrogenation reaction. Generally, the fixed bed reaction device evaluates the catalyst of alkane dehydrogenation, especially the catalyst of propane dehydrogenation to propylene has the following defects: the catalytic reaction cannot Continuous, the catalyst reusability test requires frequent cooling, heating and dismantling of the reaction tube; the propane dehydrogenation reaction is special, and the general stainless steel reaction tube will participate in the reaction and affect the reaction result. It is blocked by carbon or coking, which affects the efficiency and results of the experiment. It is necessary to provide a performance evaluation device and evaluation method for catalysts used in propane dehydrogenation to propylene

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  • A method for performance evaluation of catalysts for propane dehydrogenation to propylene
  • A method for performance evaluation of catalysts for propane dehydrogenation to propylene
  • A method for performance evaluation of catalysts for propane dehydrogenation to propylene

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Embodiment 1

[0055] like figure 1 and image 3 As shown, the performance evaluation device of the catalyst for propane dehydrogenation to propylene in this embodiment includes: a computer control part, a gas path part, a reaction part connected to the gas path part, and an analysis and detection part connected to the reaction part;

[0056] The gas circuit part includes four gas pipelines connected in parallel, the four gas pipelines are nitrogen pipeline, propane pipeline, hydrogen pipeline and air pipeline respectively, and each gas pipeline is provided with a gas pipeline connected in series. Bottle 1, mass flow meter 2 and check valve 3;

[0057] The reaction part includes an electrothermal multi-stage furnace 4 with a high temperature section, a medium temperature section and a low temperature section. A reaction tube is inserted through the electrothermal multi-stage furnace 4, and an inlet pressure gauge 9 is arranged at the entrance of the reaction tube. , the outlet of the react...

Embodiment 2

[0065] like figure 2 and image 3 As shown, the performance evaluation device of the catalyst for propane dehydrogenation to propylene in this embodiment includes: a computer control part, a gas path part, a reaction part connected to the gas path part, and an analysis and detection part connected to the reaction part;

[0066] The gas circuit part includes four gas pipelines connected in parallel, the four gas pipelines are nitrogen pipeline, propane pipeline, hydrogen pipeline and air pipeline respectively, and each gas pipeline is provided with a gas pipeline connected in series. Bottle 1, mass flow meter 2 and check valve 3;

[0067] The reaction part includes an electrothermal multi-stage furnace 4 with a high temperature section, a medium temperature section and a low temperature section. A reaction tube is inserted through the electrothermal multi-stage furnace 4, and an inlet pressure gauge 9 is arranged at the entrance of the reaction tube. , the outlet of the reac...

Embodiment 3

[0076] The present embodiment utilizes the method for evaluating the performance of the catalyst for propane dehydrogenation to propylene using the device described in Example 1 to include two stages, the first stage is to evaluate the performance of the active catalyst (i.e. method I); the second stage is When the activity of the active catalyst is reduced or deactivated due to long-term use, carbon deposition and other factors, the catalyst is regenerated, and the performance of the regenerated catalyst is evaluated (ie method II). combine figure 1 and image 3 , the present embodiment catalyst performance evaluation method specifically comprises the following steps:

[0077] The first stage is to evaluate the performance of the active catalyst. The specific process is:

[0078] Step 1. Pretreatment: Fill the reaction tube with an active catalyst for propane dehydrogenation to propylene, then insert the reaction tube into the electric heating multi-stage furnace 4, and place...

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Abstract

The invention provides a performance evaluation device for a catalyst for propane dehydrogenation to propylene, which comprises a computer control part, a gas path part, a reaction part connected with the gas path part and an analysis and detection part connected with the reaction part. The present invention also provides a method for evaluating the performance of the catalyst for propane dehydrogenation to propylene by using the device. The method can not only evaluate the performance of the active catalyst, but also regenerate and regenerate the catalyst with reduced activity or deactivation. The performance of the regenerated catalyst was evaluated. The invention is simple in structure and reasonable in design, can meet the requirements of catalytic reaction and catalyst regeneration, realize the continuous three stages of catalyst reaction, regeneration and activation, and improve the efficiency of catalyst performance evaluation. The device is not only suitable for propane dehydrogenation to propylene reaction, but also suitable for hydrogenation, dehydrogenation, oxidation, cracking or isomerization of other alkanes.

Description

technical field [0001] The invention belongs to the technical field of chemical experiments, and in particular relates to a performance evaluation device and an evaluation method of a catalyst for propane dehydrogenation to propylene. Background technique [0002] Catalyst performance evaluation is an important part of catalyst production and application. Catalyst performance evaluation results can most directly reflect the activity of catalysts and are the standard for judging whether catalysts are qualified. The performance evaluation of laboratory fixed-bed catalysts is usually carried out in fixed-bed reaction devices. Traditional laboratory fixed-bed reaction devices are usually fully manual operations, and the control of gas inlet, liquid inlet, catalytic reaction, and analysis and detection is insufficient. , Poor cohesion, coupled with complex operations and many human factors, lead to large deviations in the evaluation results of catalyst performance, so the efficie...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N30/88
CPCG01N30/88G01N2030/8804G01N2030/8809
Inventor 林涛万克柔程杰李霖张之翔曾永康曾利辉高武
Owner XIAN CATALYST NEW MATERIALS CO LTD
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