Duketech has been focusing on the analysis and monitoring of the ppt, ppb and ppm level gas, and provides multi-parameter parameter measurement instrument and integral solution for scientific research of institutions of higher learning and scientific research institutes. in that conference, the whole set of catalytic energy efficiency evaluation system and the purification adsorption energy efficiency evaluation system of the process of photocatalysis, thermal catalysis, electrocatalysis, mixed catalytic reaction, CO2 catalytic reduction and the like provide a high-efficiency micro-gas monitoring scheme.