Bipolar miniature fixed-bed reactor combined with photoionization mass spectrometry online detection system and method

A fixed-bed reactor and detection system technology, applied in instruments, measuring devices, scientific instruments, etc., can solve problems such as difficulty in fully exerting catalyst catalytic efficiency, inability to separate biomass pyrolysis carbon, and difficulty in accurately analyzing coke, etc. The effect of small size, sufficient heating, and fast heating and cooling

Active Publication Date: 2022-05-24
HEFEI UNIV OF TECH
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  • Abstract
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  • Claims
  • Application Information

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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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  • Bipolar miniature fixed-bed reactor combined with photoionization mass spectrometry online detection system and method
  • Bipolar miniature fixed-bed reactor combined with photoionization mass spectrometry online detection system and method
  • Bipolar miniature fixed-bed reactor combined with photoionization mass spectrometry online detection system and method

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Embodiment 1

[0052] like Figure 1-7 As shown, a bipolar miniature fixed bed reactor combined with photoionization mass spectrometry online detection system includes a bipolar miniature fixed bed reactor 1, an offline cooling device 4 and an online detection device 5. The bipolar miniature fixed bed reactor 1 The offline cooling device 4 and the online detection device 5 are respectively connected, and the bipolar micro-fixed bed reactor 1 is connected to the offline cooling device 4 through the transmission line 3;

[0053] The bipolar micro-fixed bed reactor 1 performs catalytic pyrolysis on the solid fuel sample, and the produced pyrolysis gas enters the online monitoring device for online monitoring or enters the offline cooling device 4 for collection.

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

[0055] The material of the transmission line 3 is a capillary, and the outside of the capillary is provided with a copper tube and...

experiment example 1

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

[0093] The transparent quartz glass fixed-bed reactor 12 of the pyrolysis group is put into powdered poplar, and the transparent quartz glass fixed-bed reactor 19 of the catalytic group is put into the catalyst. First turn on the temperature controller for preheating (the preheating temperature is determined according to the requirements of the pyrolysis reaction). The preheating temperature is set to 500°C. Before preheating, 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 separated from the heating unit 2 by rotating the screw rod 21. , the high temperature valve 15 is opened, and nitrogen at a certain flow rate is blown into ...

Embodiment 2

[0096] On the basis of the first embodiment, the left lead screw 21 and the right lead screw 21 are respectively connected to a lead screw motor through a coupling, and the lead screw motor is used as a driving mechanism to drive the rotation, so as to fit and connect the parts through the nut The cooperation drives the pyrolysis furnace and the catalytic furnace to rise and fall.

[0097] Preferably, the screw motors of the first lifting mechanism and the second lifting mechanism are connected to a power source through a motor driver to maintain synchronous rotation, preferably the same motor driver is connected to two screw motors.

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Abstract

The invention relates to a bipolar miniature fixed bed reactor combined with a photoionization mass spectrometry online detection system and method. The bipolar miniature fixed bed reactor combined with a photoionization mass spectrometry online detection system includes a bipolar miniature fixed bed reactor and an off-line cooling device and an online detection device, the bipolar miniature fixed-bed reactor is connected to an off-line cooling device and an on-line detection device respectively, and the bipolar miniature fixed-bed reactor is connected to an off-line cooling device through a transmission line; Catalytic pyrolysis; the pyrolysis reaction and the catalytic reaction of the present invention do not interfere with each other, the reactor and the heating unit can quickly separate and cool down, and can accurately analyze two different types of coke in the primary state; a high temperature valve is used between the two reactors Partition can realize intermittent continuous injection of solid fuel and real-time monitoring of catalyst deactivation. The device and reactor are small in size and the residence time of reactants is short. It is suitable for basic experimental research and is worthy of vigorous promotion.

Description

technical field [0001] The invention belongs to the research field of solid fuel catalytic pyrolysis reaction and product on-line detection, in particular to a bipolar miniature fixed bed reactor combined with photoionization mass spectrometry on-line detection system and method for solid fuel ectopic catalytic pyrolysis reaction mechanism research. Background technique [0002] Pyrolysis is an important thermochemical conversion technology for solid fuels. Taking biomass pyrolysis as an example, biomass rapid pyrolysis technology is an important way of biomass utilization. If the biomass pyrolysis is directionally regulated by appropriate means, the pyrolysis reaction will be promoted according to some specific paths, and other reaction pathways will be inhibited, so as to realize the selective pyrolysis and liquefaction of biomass, thereby controlling the distribution of pyrolysis products. According to the current research, by introducing suitable catalysts and optimizin...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N31/10G01N27/64
CPCG01N31/10G01N27/64
Inventor 贾良元王家豪
Owner HEFEI UNIV OF TECH
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