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

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...

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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

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