Gas-solid reaction kinetic parameter analyzer

Abstract

A kinetic parameter analyzer for gas / solid reaction comprises an electric furnace arranged with a thermocouple; a micro-reactor loaded with flowing medium particles and positioned in the electric furnace; a pressure sensor and a temperature control device for controlling the temperature of the flowing medium particles, which are arranged in the reactor; a reactant supplier for supplying solid-state reactant to the flowing medium particles; a gas supply device arranged on the bottom of the reactor for providing gas into the reactor; a gas purifier and a detector sequentially communicated with the upper gas outlets of the reactor; a data collector with the input terminals thereof respectively connected with the output terminals of the pressure sensor, the temperature control device, a temperature display meter and the detector; and a computer for controlling the opening / closing of the reactant supplier and analyzing the data inputted by the data collector. The analyzer adopts a micro-fluidized bed or a micro-spouted bed as the reactor, which facilitates the online addition of the solid-state reactant, so that the reaction environment is more approximate to the actual environment and to the actual reaction conditions and that the measured kinetic parameters are more close to intrinsic reaction kinetics.

Description

technical field [0001] The invention belongs to the field of chemical analysis and testing, and relates to a gas-solid reaction kinetic parameter analyzer. The gas-solid reaction kinetic parameter analyzer can accurately measure the reaction speed and reaction time, and determine the reaction kinetic parameters such as reaction activation energy through comprehensive analysis. It is especially suitable for gas-solid reactions that require online solid reactant addition and the key product is gas. . Background technique [0002] The measurement of chemical reaction kinetic parameters, such as reaction velocity, is the starting point of research and development work in the fields of chemistry, chemical engineering, thermal energy, materials, energy, environment and other disciplines. There are two methods for measuring the rate of a chemical reaction: the differential method and the integral method. However, the integral method needs to assume a reaction kinetic expression i...

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Problems solved by technology

However, reactors with a larger size and similar to the bench-scale (Megarities et al, Energy & Fuels, 1998, Vol.12, pp.144-151), such as a diameter of 40 to 100 mm and a height of 500 to 1000 mm, etc., usually not a true differential reactor

Gas mixing, diffusion and other processes in this type of reactor will inevitably bring great difficulties to the measurement of reaction kinetic parameters of fast reactions such as biomass thermal decomposition

Moreover, since there is no uniform standard for the size of the reactor, the experimental data obtained by different researchers using reactors of different sizes must have serious dispersion.

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