生物质锅炉羰基化合物排放特征分析

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Abstract

To characterize the carbonyl emission from biomass-fired boilers, air samples collected from six typical biomass-fired boilers were analyzed by a PFPH-GC/MS method to determine 21carbonyl species. The results showed that distinctive emission characteristics of carbonyl compounds for each boiler. In general, hexanaldehyde and propionaldehyde were the most abundant carbonyl compounds with a percentage of 29%~47% and 19%~31% in the total carbonyls, respectively, followed by formaldehyde and acetone; otherwise, acetaldehyde and nonanal. The emission factors of carbonyl compounds were calculated with the total amount of emission and the mass ration of consumed fuels. It found that the emission factors of carbonyl compounds ranged from 3.06 to 18.29mg/kg (with an average of 9.45±6.05mg/kg). The calculated Maximum Increment Reactivity (MIR) was utilized to assess the atmospheric chemical reactivity and the Ozone Formation Potential (OFP) of emissions from the biomass-fired boilers. The average of OFP (in O₃) was 5.97gO₃/gVOCs, and the three largest contributors among the measured carbonyl compounds were hexanaldehyde, propionaldehyde and formaldehyde. Although acetone had a high mass concentration, it only gave a relatively low contribution to ozone formation.

Key words： Biomass combustion boiler carbonyl compounds emission profiles emission factor ozone formation potential (OFP)

Received: 16 July 2017

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	Articles by authors
	SHEN Li-ran
	ZHANG Chun-lin
	WU Chang-da
	WANG Bo-guang
	BAI Li
	YANG Li-hui
	HUANG Jiang-rong
	Liu Jun

Cite this article:

SHEN Li-ran,ZHANG Chun-lin,WU Chang-da等. Emission characteristics of carbonyl compounds emitted from biomass-fired-boilers[J]. CHINA ENVIRONMENTAL SCIENCECE, 2018, 38(2): 490-498.

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http://www.zghjkx.com.cn/EN/ OR http://www.zghjkx.com.cn/EN/Y2018/V38/I2/490

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