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| Nitrogen oxides emission coefficient of coal chemical industry |
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Abstract Nitrogen oxide emissions from the processing of methanol, dimethyl ether, synthetic ammonia and urea production were monitored in a certain coal chemical factory in Shaanxi province, and the nitrogen oxide emission coefficients were calculated based on the results of both monitoring and combustion experiments. It was shown that Nitrogen oxide emissions ranged from the different coal chemical production industries. The NOx discharge amounts of methanol, dimethyl ether, synthetic ammonia and urea industries were separately between 153.19 and 252.43g/h (AV: 211.24g/h), 22.38and 52.20g/h (AV:35.39g/h), 246.48and 356.65g/h (305.94g/h), 13.70and 26.75g/h (19.89g/h). Per capita production NOx emission coefficients in different industries also varied, which were 41.33~88.10g/t (methanol), 62.27~145.25g/t (synthetic ammonia), 213.47~322.43g/t (synthetic ammonia), 0.21~0.41g/t (urea). Per capita coal consumption as raw material NOx emission coefficients were respectively 30.18~52.86g/t (methanol), 22.83~53.26g/t (synthetic ammonia), 119.72~172.73g/t (synthetic ammonia), 0.14~0.28g/t (urea). Compared with two group data, NOx emission coefficients with coal as raw material were much less than those from coal combustion process.
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Received: 12 August 2013
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