国产在线气相色谱仪分析天然气组成的适应性研究.

Objective On-line gas chromatograph is the key analysis equipment to realize natural gas energy measurement. It is of great significance to carry out the research on the adaptability of domestic on-line gas chromatograph, and to break the technical barriers of imported on-line gas chromatograph and to realize the localization of instruments and equipment. Method The gas standard material was analyzed by on-line gas chromatograph and the field application test was carried out, analyze and evaluate the effectiveness, separation degree, reproducibility, accuracy and stability of the prototype. Results The prototype can effectively analyze the content of N2, CO2, C1-C6 hydrocarbon components in the gas, and the analysis period is not more than 2 min; resolution R=2.0 for iC4 and nC4, quantitative repeatability RSD≤1.0% for nC4; the stability of the prototype operation for 4 hours is 3.0%; the relative deviation from the actual natural gas samples obtained by imported on-line gas chromatograph is not more than 0.1%. Conclusions The developed prototype can basically meet the needs of natural gas energy measurement, which provides a technical reference for the comprehensive implementation of natural gas energy measurement and the localization of on-line gas chromatograph in China. [ABSTRACT FROM AUTHOR]