Method for detecting catalyst coking amounts in reactor by utilization of pressure drop

A detection method and pressure drop detection technology, which is applied in the direction of measuring devices, instruments, scientific instruments, etc., can solve the problem that the coking amount of the catalyst cannot be detected on-line in situ, and achieve good economy, wide application range, and reduce equipment investment Effect

Inactive Publication Date: 2015-08-26
JIANGNAN UNIV
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

[0007] The invention can effectively solve the problem that the in-situ on-line detection of the coking amount of the catalyst in the reactor cannot be realized in the current industrial fluidized bed

Method used

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  • Method for detecting catalyst coking amounts in reactor by utilization of pressure drop
  • Method for detecting catalyst coking amounts in reactor by utilization of pressure drop
  • Method for detecting catalyst coking amounts in reactor by utilization of pressure drop

Examples

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Example Embodiment

[0028] Example 1: A laboratory fixed-bed catalyst evaluation device is used to illustrate the specific implementation method. Such as figure 1 The device shown is a laboratory for evaluating the reaction performance of the solid catalyst in the methanol-to-olefin process, and it mainly includes three parts: a raw material feed system, a reaction system and a product analysis system. The feed system includes raw material tanks, metering pumps, vaporizers and nitrogen cylinders; the reaction system is mainly composed of a fixed bed reactor, the reactor is outsourced with an electric insulation device (in figure 1 Not shown), to ensure that the catalytic reaction can be carried out at the preset reaction temperature; the product analysis system generally includes product composition analysis and product flow analysis.

[0029] The general fixed-bed catalyst evaluation device only has a pressure gauge installed at the entrance. In order to facilitate the detection of the amount of cat...

Example Embodiment

[0038] Example 2: A cold model experimental device for detecting the coke content of a solid catalyst in a fluidized bed reactor using bed pressure drop in the laboratory is as follows figure 2 Shown. The fluidized bed is filled with a catalytic cracking (FCC) catalyst with a known coke content provided by a factory. The gas from the fan is measured by a gas flow meter and then enters the fluidized bed. The pressure drop of the fluidized bed is determined by the U-shaped pressure difference. Measure out. The fluidized bed reactor used in the cold model experiment has an inner diameter of 300mm, and the catalyst bed height during the experiment is 600mm.

[0039] The coke content of the catalytic cracking catalyst used in the experiment process is known as the coke content analyzed by the thermogravimetric analyzer, as shown in Table 3.

[0040] Table 3 FCC catalyst real coking amount

[0041]

[0042] During the experiment, the U-type differential pressure gauge detects the pressu...

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Abstract

The invention discloses a method for detecting catalyst coke deposit amounts in a reactor by utilization of catalyst bed pressure drop. The method comprises the steps: pressure drop and coke deposit amounts of a catalyst bed layer in a reactor under a plurality of conditions are obtained, the catalyst coke deposit amounts and the pressure drop under the conditions are associated for modeling, and then through prediction model and pressure drop of the catalyst bed layer under a certain condition, the catalyst coke deposit amount in an unknown condition is calculated and obtained. The method is rapid and accurate, has a wide application scope, can be used for on-line detection of catalyst coke deposit amount in a fixed bed or fluidized bed reactor industrially, and has an important meaning for optimization of operation of the catalyst reaction-regeneration process.

Description

technical field [0001] The invention relates to the detection field of catalyst coking amount in a reactor, in particular to a method for detecting catalyst coking amount by using the reactor bed pressure drop. Background technique [0002] During reactions such as methanol to propylene (MTP), methanol to olefins (MTO), catalytic cracking (FCC), natural gas to olefins, and olefin disproportionation, the activity of the catalyst will decrease or disappear due to carbon deposition on the surface or internal pores. The process is called coking of the catalyst. [0003] Catalyst coking is an extremely complex physical and chemical process, and its complexity is reflected in the coke type, coking location and coking mechanism. First of all, according to different conditions such as reaction temperature and time, various cokes are produced, which can be any one of aliphatic hydrocarbons, olefins and aromatic hydrocarbons, or a mixture of these three hydrocarbons. Secondly, durin...

Claims

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Application Information

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IPC IPC(8): G01N5/00
Inventor 吕杭蔚楼旭阳
Owner JIANGNAN UNIV
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