Gas path configuration method for measuring three main greenhouse gases using two-valve system

Abstract

The invention discloses a gas circuit configuration method for measuring three major greenhouse gases by using a double-valve system and relates to a gas circuit configuration method for measuring concentration of three major greenhouse gases, namely carbon dioxide, methane and nitrous oxide, by using gas chromatography. The method uses two ten-way valves, two quantitative pipes, three chromatographic columns, a nickel reformer, a three-way joint, four paths of nitrogen, a hydrogen flame ionization detector and an electron capture detector; the measurement of nitrous oxide and methane shares one quantitative pipe via reasonable gas circuit configuration; with the adoption of appropriate valve switching time setup in an analysis method, a gas flow path is switched to achieve sample introduction at one time; and three major greenhouse gas components in a gas sample can be detected sequentially after separated by the chromatographic columns. The method is mainly applicable to monitoring a greenhouse gas emission state in atmospheric environments of different ecological systems in the climatic change research field.

Description

[0001] Technical field: [0002] The invention relates to a gas sample analysis method, in particular to a gas path configuration method for analyzing three main greenhouse gas components in a gas sample by using a valve, and is mainly used for studying the three main greenhouse gas carbon dioxide in the atmospheric environment (CO 2 ), methane (CH 4 ) and nitrous oxide (N 2 O) concentration gas chromatography gas path configuration method. [0003] Background technique: [0004] According to the Fifth Assessment Report of the Intergovernmental Panel on Climate Change (IPCC), the most authoritative organization in international climate change research, it is pointed out that 95% of climate warming may be due to greenhouse gases (mainly including CO2) emitted by human activities such as fossil fuel combustion and land use change. 2 、CH 4 and N 2 O, etc.) lead to an increase in the concentration of greenhouse gases in the atmosphere. The current observation results show tha...

AI Technical Summary

Problems solved by technology

The method uses two six-way valves, one ten-way valve, and one four-way valve to design the gas circuit, and uses five carrier gases. Due to the large number of valves and the complexity of the gas circuit, the hardware cost of the configuration is relatively high. , the method analysis takes a correspondingly longer time, and the operating cost is also higher

Images