N 2 O emission factors of nitric acid production in China from CDM projects

Industrial production process including nitric acid production is an important greenhouse gas emission source. Although IPCC guidelines have given calculation methods and emission factors for N2O emission from nitric acid production, emission factors of nitric acid production in China are not given. And it can be seen from the comparison of the guidelines and registered CDM projects in China that the N2O emission factors given in the IPCC guidelines and actual N2O emission from nitric acid production in China differ greatly while measured N2O emission data is not available, so determination of emission factors for N2O emission from nitric acid production is an important basic research for N2O emission calculation in China. The method that calculate N2O emission factors from nitric acid production in China is studied with baseline emission factors based on actual measurement of registered CDM projects and the calculated emission factor is compared with that given in the IPCC guidelines in the text.