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Online detection system and method combining bipolar miniature fixed bed reactor with photoionization mass spectrum

A fixed-bed reactor and detection system technology, which is applied in the direction of instruments, measuring devices, scientific instruments, etc., can solve the problems of difficulty in fully exerting the catalytic efficiency of catalysts, inability to separate biomass pyrolysis carbon, and difficulty in accurately analyzing coke. Small size, full heating, fast heating and cooling effect

Active Publication Date: 2019-09-06
HEFEI UNIV OF TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] 1. There is a difference between the temperature required for the pyrolysis of the biomass raw material and the activation temperature of the catalyst, so it is likely that the biomass raw material has already started to pyrolyze when the catalyst does not reach the optimum temperature in the experiment, and it is difficult to give full play to the catalytic efficiency of the catalyst;
[0007] 2. During the catalytic pyrolysis process of biomass, liquid or colloidal intermediates will be produced, which will cover the active sites on the surface of the catalyst, leading to the gradual deactivation of the catalyst;
[0008] 3. Since the biomass and the catalyst are mixed and heated together, it is impossible to separate the biomass pyrolysis char (bio-char) and the coke (coke) remaining in the deactivated catalyst and cool down rapidly, making it difficult to accurately analyze the two different types coke

Method used

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  • Online detection system and method combining bipolar miniature fixed bed reactor with photoionization mass spectrum
  • Online detection system and method combining bipolar miniature fixed bed reactor with photoionization mass spectrum
  • Online detection system and method combining bipolar miniature fixed bed reactor with photoionization mass spectrum

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Embodiment 1

[0052] Such as Figure 1-7 Shown, a kind of bipolar miniature fixed-bed reactor combines photoionization mass spectrometry on-line detection system, comprises bipolar miniature fixed-bed reactor 1, off-line cooling device 4 and on-line detection device 5, described bipolar miniature fixed-bed reactor 1 Connect the off-line cooling device 4 and the on-line detection device 5 respectively, and the bipolar miniature fixed-bed reactor 1 is connected to the off-line cooling device 4 through the transmission line 3;

[0053] The bipolar miniature fixed-bed reactor 1 carries out catalytic pyrolysis to the solid fuel sample, and the pyrolysis gas produced enters the on-line monitoring device for on-line monitoring or enters the off-line cooling device 4 for collection.

[0054] Preferably, the bipolar miniature fixed-bed reactor 1 adopts a photoionization mass spectrometer.

[0055] The material of described transmission line 3 is capillary tube, and the outside of capillary tube is ...

experiment example 1

[0092] Experimental example 1, illustrate with a certain special case, the following is the experimental process carried out under the conditions that the solid fuel sample takes some biomass raw material poplar, and the catalyst takes some HZSM-5:

[0093] Pyrolysis group transparent quartz glass fixed-bed reactor 12 is put into powdered poplar wood, and catalytic group transparent quartz glass fixed-bed reactor 19 is put into catalyzer. First open the temperature controller to preheat (the preheating temperature is determined according to the required requirements of the pyrolysis reaction). Assuming that the preheating temperature is 500°C, the transparent quartz glass fixed bed reactor 19 of the catalytic group and the transparent quartz glass fixed bed reactor 12 of the pyrolysis group are both separated from the heating unit 2 by rotating the screw mandrel 21 before preheating. , the high temperature valve 15 is opened, and nitrogen of a certain flow rate is blown into t...

Embodiment 2

[0096] On the basis of Embodiment 1, the screw rod 21 on the left side and the screw rod 21 on the right side are respectively connected to a screw motor through a coupling, and the screw motor is used as a driving mechanism to drive the rotation, so that through the cooperation of the nut and the connecting parts The cooperation drives the pyrolysis furnace and the catalytic furnace to rise and fall.

[0097] Preferably, the screw motors of the first elevating mechanism and the second elevating mechanism are connected to a power supply through a motor driver to keep rotating synchronously, preferably the same motor driver is connected to two screw motors.

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Abstract

The invention relates to an online detection system and method combining a bipolar miniature fixed bed reactor with a photoionization mass spectrum. The online detection system combining the bipolar miniature fixed bed reactor with the photoionization mass spectrum comprises the bipolar miniature fixed bed reactor, an offline cooling device and an online detection device; the bipolar miniature fixed bed reactor is respectively connected with the offline cooling device and the online detection device; the bipolar miniature fixed bed reactor is connected with the offline cooling device by a transmission line; and the bipolar miniature fixed bed reactor carries out catalytic pyrolysis on a solid fuel sample. According to the invention, a pyrolytic reaction and a catalytic reaction are not interfered mutually; reactors and a heating unit can be rapidly separated and cooled, and two different types of cokes in a primary state can be accurately analyzed; two reactors are separated by a high-temperature valve; solid fuel intermittent continuous sampling and catalyst inactivation real-time monitoring can be implemented; and the online detection system and method combining the bipolar miniature fixed bed reactor with the photoionization mass spectrum are small in volume of the devices and the reactors, short in reactant retention time, suitable for the fundamental experiment study and valuable to popularize energetically.

Description

technical field [0001] The invention belongs to the research field of solid fuel catalytic pyrolysis reaction and product online detection, and specifically relates to a bipolar miniature fixed-bed reactor combined with photoionization mass spectrometry online detection system and method for research on the mechanism of solid fuel heterogeneous catalytic pyrolysis reaction. Background technique [0002] Pyrolysis is an important solid fuel thermochemical conversion technology. Taking biomass pyrolysis as an example, rapid biomass pyrolysis technology is an important way to utilize biomass. If the biomass pyrolysis is oriented and regulated by appropriate means, the pyrolysis reaction is promoted to follow certain specific pathways, and other reaction pathways are inhibited to achieve selective pyrolysis and liquefaction of biomass, thereby controlling the distribution of pyrolysis products. According to the current research, by introducing a suitable catalyst and optimizing...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N31/10G01N27/64
CPCG01N31/10G01N27/64
Inventor 王家豪其他发明人请求不公开姓名
Owner HEFEI UNIV OF TECH
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