What is a laboratory biomass pyrolysis tube furnace?
The laboratory biomass pyrolysis tube furnace is a device specially designed for pyrolysis research and experiments on biomass in a laboratory environment.
It usually consists of a tubular furnace, a heating system, a temperature control system, a gas supply and exhaust system, and a sample loading and collection device.
This tube furnace can provide precise temperature control and a specific reaction atmosphere to simulate the pyrolysis process of biomass under different conditions. Researchers can deeply study the reaction mechanism, product distribution and characteristics of biomass pyrolysis by changing parameters such as temperature, heating rate, residence time, and atmosphere composition.
Compared with industrial-scale pyrolysis equipment, laboratory biomass pyrolysis tube furnaces are smaller in scale and more flexible in operation, which facilitates experiments and optimization under various conditions, and provides basic data and theoretical support for the development and improvement of large-scale biomass pyrolysis processes.
The working principle of the laboratory biomass pyrolysis tube furnace is as follows:
First, put an appropriate amount of biomass sample into the quartz tube or high temperature resistant tube of the tube furnace.
The tube furnace heats the furnace through external heating devices, such as resistance wires, heating sleeves, etc.
During the heating process, an oxygen-deficient or low-oxygen environment is formed in the tube to promote the pyrolysis reaction.
As the temperature gradually rises, the biomass begins to thermally decompose. Components such as cellulose, hemicellulose and lignin in the biomass break chemical bonds to produce a series of intermediates.
These intermediates further react, such as decarboxylation, dehydration, dehydrogenation, etc.
At a specific temperature and reaction time, the biomass is finally pyrolyzed into bio-oil vapor, non-condensable gas and solid biochar.
Bio-oil vapor and non-condensable gas are exported through pipelines for subsequent collection and analysis.
The solid biochar remains in the tube and is taken out for research after the tube furnace cools down.
Throughout the process, factors such as temperature control accuracy, heating rate, atmosphere (such as flow and composition of nitrogen, inert gas, etc.) and sample residence time will significantly affect the distribution and properties of biomass pyrolysis products. By adjusting and studying these parameters, we can gain a deeper understanding of the reaction mechanism of biomass pyrolysis and provide a basis for optimizing process conditions.
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