Atmospheric pressure photoionization mass spectrum device for analyzing solid fuel pyrolysis on line

Abstract

The invention relates to an atmospheric pressure photoionization mass spectrum device for analyzing solid fuel pyrolysis on line. The device comprises a pyrolyzing furnace, an auxiliary volatile solvent introduction mechanism, an atmospheric pressure photoionization source and a mass spectrometer. With the increasingly exhausted fossil fuel, a process of preparing various hydrocarbon fuels and petrochemical materials through solid fuel pyrolysis is gradually concerned by people. According to the invention, the species distribution and generation mechanism of solid fuel pyrolysis products such as solid wastes (such as polypropylene), biomass, coal and oil shale can be accurately and rapidly analyzed on line in real time, people can be helped to well master the internal rules of pyrolysis, effective resource utilization is comprehensively realized, and the device has great significance on sustainable development of China.

Description

technical field [0001] The invention belongs to the experimental technology in the field of thermal analysis, in particular to an atmospheric pressure photoionization mass spectrometry device capable of fast, accurate and real-time online analysis of solid fuel pyrolysis products. Background technique [0002] In recent years, based on the requirements of energy utilization and environmental protection, people have paid attention to the thermochemical conversion and utilization of solid fuels. Solid fuel pyrolysis is not only a kind of solid fuel utilization method, but also a necessary stage in the combustion and gasification process of solid fuels. , so it is very important to conduct an in-depth mechanistic study. The pyrolysis process of solid fuels is extremely complex, with a wide variety of products. Only by accurately and comprehensively obtaining the information of various stable and unstable products can we deeply understand the pyrolysis mechanism of biomass. In ...

AI Technical Summary

Problems solved by technology

However, the low-pressure photoionization mass spectrometry technology takes place in a low-pressure environment. In order to avoid contamination of the chamber by non-volatile components, the general pyrolysis products must be filtered through a filter before entering the low-pressure vacuum chamber, resulting in products that are relatively large and easy to condense. Riddle

Even so, many products with relatively small mass (m / z≤200) will still remain in the vacuum chamber and pollute the chamber

In order to maintain the cleanliness of the vacuum chamber, the instrument needs to be cleaned frequently, and the operation is cumbersome

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