Gas-solid phase in-situ Raman reaction tank

Abstract

The invention belongs to the field of accessory research of spectroscopic technique application, and particularly provides a gas-solid phase in-situ Raman reaction tank which can be applied to the field of catalysis chemistry, materials, atmospheric chemistry and the like and in-situ research on heterogeneous process mechanism and dynamics. The in-situ reaction tank comprises a base, a detachable sample tank, a quartz glass cover, a sealing clamp sleeve, a hollow nut, an O-shaped ring groove and an air duct. The detachable sample pool can be a cylinder with a through hole at the center and made of stainless steel, PTFE materials or corundum. A heating device and a thermal couple can be embedded according to needs, thereby realizing temperature control and determination. The lower portion on the outer surface of the sample tank is provided with outer threads matching with inner threads which are arranged in the base and used for fixing the sample tank, thereby bringing convenience for filling and cleaning samples. The samples can be placed at a short focus of an ellipsoidal light collecting system of a Raman spectrometer, reaction gas entering a reaction cavity via the air duct sweeps over surfaces of the samples, and the Raman light spectrum during gas-solid reaction process can be acquired in situ.

Description

technical field [0001] The invention belongs to the field of development of spectrometer detection accessories. Background technique [0002] The uptake (adsorption, absorption, catalytic reactions) and desorption of gases on solid powder samples is an important process in the fields of environmental microinterface processes, heterogeneous catalytic chemistry, and physical chemistry. The structure of the solid powder sample itself, its structural changes during the reaction process, and the structure of the adsorbed state are one of the core issues for revealing the microscopic mechanism of the environmental microinterface process and heterogeneous catalytic process. [0003] At present, infrared spectroscopy has been widely used in the off-line and in-situ studies of the structure of powder samples in environmental microinterface processes and heterogeneous catalysis and their adsorption state structures during the reaction process. Raman spectroscopy is also widely used f...

AI Technical Summary

Problems solved by technology

In the existing infrared spectroscopic in-situ cell for the study of gas-solid phase reaction process, the sample cell is fixedly connected with the main body of the reaction cell and cannot be disassembled, which makes the filling and cleaning of powder samples very difficult

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