Micro spouted bed gas-solid reaction kinetic analysis device and analysis method

Abstract

The invention discloses a micro spouted bed gas-solid reaction kinetic analysis device and analysis method, which belong to the field of gas-solid reaction test methods and instruments. The analysis device comprises a pulse sample feeding device, an isothermal reaction generation device, a gas path device and an online gas analysis test device. A solid sample is instantaneously fed into the microspouted bed reactor through the pulse sample feeding device, reactions such as combustion, pyrolysis, gasification or decomposition are rapidly carried out under the isothermal condition of the microspouted bed reactor, a reaction mechanism is speculated by measuring a gas component generation sequence and concentration change characteristics in the reaction through the rapid online process massspectrometry, and then reaction kinetic parameters are solved. The micro spouted bed is used as a reactor, so that the online instantaneous feeding of reaction materials can be ensured, the reaction under an approximate isothermal condition is realized, the reaction condition is closer to the reaction condition in practical application, and the measured reaction kinetic parameters are closer to the intrinsic reaction kinetic parameters.

Description

technical field [0001] The invention belongs to the field of gas-solid reaction testing methods and instruments, in particular to a micro spouted bed gas-solid reaction kinetics analysis device and analysis method. The micro-spouted bed gas-solid reaction kinetics analysis device is suitable for the fields of combustion, pyrolysis and gasification of various solid fuels, ore reduction and roasting, and salt decomposition. Time, and by analyzing the characteristics of product changes to infer the reaction mechanism, and calculate the reaction kinetic parameters. Background technique [0002] Gas-solid reactions widely exist in the transformation process of substances in various fields of industrial production. The testing and analysis of gas-solid reaction characteristics and kinetics is an important content of natural science and engineering basic research, and an important support for applied technology. Only by studying the chemical kinetics of gas-solid reaction, can we ...

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Problems solved by technology

However, the chemical reaction in the thermogravimetric analyzer is seriously affected by diffusion, and it is easy to cause temperature deviation for high-energy reactions, and it is impossible to test the reaction characteristics of any fixed point temperature for unstable substances

Based on the thermogravimetric analysis data, the non-isothermal method is used to calculate the approximate integral of the temperature function for the reaction kinetics. The calculation process is complicated, and it is difficult to uniquely determine the reaction model function.

Therefore, the field of gas-solid chemical reaction technology has been committed to establishing an isothermal differential reaction analyzer that can separate the temperature function and the reaction model function, but there is still no commercial standard isothermal differential reaction test instrument.

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