| Environmental Engineering |
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| Emission inventory and trends of NOx for China, 2000–2020 |
| Yun Shi, Yin-feng Xia, Bi-hong Lu, Nan Liu, Lei Zhang, Su-jing Li, Wei Li |
| Key Laboratory of Biomass Chemical Engineering of Ministry of Education, Institute of Industrial Ecology and Environment, Zhejiang University, Hangzhou 310027, China; Institute of Environmental Engineering, Zhejiang University, Hangzhou 310058, China |
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Abstract The rapid growth of NOx emissions in China is mainly due to intensive fossil fuel consumption. In order to control NOx emissions, a multiyear NOx emission inventory was established by a bottom-up approach for the period 2000–2010. The results showed that NOx emissions increased by 2.1 times from 11.81 million tons (Mt) in 2000 to 24.33 Mt in 2010. We found that NOx emissions had exceeded SO2 emissions in 2009 by comparison with their emission trends. We also found that the unbalanced NOx emissions in Eastern China and Western China are mainly due to the different gross regional product and industrial structure. Accounting for 70% of total energy consumption in China, coal is the largest NOx emission source among all the fossil fuels. In addition, the increased use of diesel and gasoline has spurred the increase of NOx emissions from the transportation sector. Manufacturing, electricity production, and transportation together composed about 90% of the national NOx emissions. Meanwhile, energy consumption and NOx emissions in China are predicted to be 3908.5 Mt standard coal equivalent (SCE) and 19.7 Mt in 2020 with this scenario analysis, respectively. To achieve a desired NOx reduction target, China should take strict measures to control NOx emissions, such as improvement in reduction technology, promulgation of new emission standards, and joint control by various Chinese provinces.
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Received: 20 November 2013
Published: 04 June 2014
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