Integrated preparation and detection device for biomass-burning aerosol and method thereby

Patent metadata

Field	Value
Publication number	US-11427775-B2
Application number	US-202017074808-A
Country	US
Kind code	B2
Filing date	Oct 20, 2020
Priority date	Oct 21, 2019
Publication date	Aug 30, 2022
Grant date	Aug 30, 2022

Abstract

Disclosed herein are integrated preparation and detection devices for studying biomass-burning aerosols, where the devices include a micro-fluidized bed reactor (MFBR), a transmission line, and an on-line detection unit that are connected in sequence. The MFBR may include a pyrolysis reactor and a pyrolysis furnace; the pyrolysis reactor may include a thermocouple, an introduction tube, and quartz sands; the on-line detection unit may be an on-line photoionization mass spectrometer; and the photoionization mass spectrometer may include a laser desorption system, a laser ionizer and a light energy ionizer. Devices of the present disclosure are beneficial to retain the original state of aerosol particles, and the fixed MFBR can realize rapid pyrolysis of a biomass due to its high and stable heat conduction efficiency, which is beneficial to studying the formation mechanism of aerosol particles.

First claim

What is claimed is:

1. A method for preparing an aerosol, the method comprising:
placing a biomass sample in an upper half of a pyrolysis reactor contained in a micro-fluidized bed reactor, wherein the micro-fluidized bed reactor is made of quartz glass, the pyrolysis reactor contains quartz sand, and the quartz sand is located at a position 3 cm above the bottom of the pyrolysis reactor with a thickness of 3 mm;
sealing the micro-fluidized bed reactor and introducing nitrogen in order to remove oxygen from the micro-fluidized bed reactor; and
introducing the biomass sample into the quartz sand and subjecting the biomass sample to pyrolysis due to a uniform temperature range of the quartz sand to form the aerosol with a carrier gas introduced into the pyrolysis reactor during the pyrolysis, wherein a flow rate of the carrier gas is controlled so as to avoid a secondary reaction of the aerosol.

2. The method according to claim 1 , wherein the micro-fluidized bed reactor adopts a fixed design.

3. The method according to claim 1 , wherein the micro-fluidized bed reactor further contains a pyrolysis furnace.

4. The method according to claim 1 , wherein the pyrolysis reactor further contains a thermocouple and an introduction tube.

Assignees

• Univ Tianjin

Inventors

• Cheng Zhanjun
• Cao Congcong
• Chen Guanyi
• Wang Jinglan
• Tian Jing
• Yan Beibei

Classifications

• G01N27/64

  using wave or particle radiation to ionise a gas, e.g. in an ionisation chamber · CPC title

• H01J49/0472 Primary

  with means for pyrolysis · CPC title

• H01J49/0445

  with means for introducing as a spray, a jet or an aerosol (electrospray ion sources H01J49/165) · CPC title

• C10J2200/15

  Details of feeding means · CPC title

• C10J2300/0993

  Inert particles, e.g. as heat exchange medium in a fluidized or moving bed, heat carriers, sand · CPC title