Characteristics of carbonyl compounds from boilers fired different types of fuel

YAO Qian1 SHEN Li-ran2,3 ZHANG Chun-lin2 BAI Li3 HUANG Jiang-rong3 LIU Jun3 YANG Jun1 WANG Hao1 WANG Bo-guang1

(1.Institute for Environmental and Climate Research, Jinan University, Guangzhou 511436)
(2.Institute for Environmental and Climate Research, Jinan University, Guangzhou 510308)
(3.Guangdong Environmental Monitoring Center, Guangzhou 510308)
【Knowledge Link】utility boiler

【Abstract】To explore the emission characteristics of carbonyl compounds (CCs) from boilers with different fuel types, the exhausts from the stacks of 14 industrial boilers, whose fuel type included coal, biomass, petroleum coke, and natural gas, and two coal-fired utility boilers were sampled in the study. Twenty-one CCs were analyzed by an air bag–PFPH derivative–GC/MS method. The results showed that the composition of CCs in the exhausts varied significantly among different fuel types of boilers (One-way ANOVA, F = 4.458, P = 0.028 < 0.05). The total mass concentration of CCs (based on 9% oxygen content) was ranked as petroleum coke fired boilers > utility boilers > coal-fired boilers > gas-fired boilers > biomass-fired boilers, with the total mass concentrations of (6 306.25 ± 1 335.35), (5 745.96 ± 2 864.62), (5 313.57 ± 2 959.36), (2 461.38 ± 1 052.35), and (1 341.18 ± 616.46) µg/m3, respectively. Furthermore, among all types of boilers, low-molecular-mass-weight CCs, (e.g., formaldehyde, aldehyde, acetone, and propanal) were the most important contributors to the total CCs of the exhaust, which occupied 87.56%, 91.36%, 92.94%, 78.70%, and 45.84% in the exhausts of petroleum coke fired, utility, coal-fired, gas-fired, and biomass-fired boilers, respectively. At last, ozone formation potential (OFP) was evaluated by maximum incremental reactivity (MIR) and total hydroxyl radical (OH) reactivity by CCs, respectively, revealing that formaldehyde, propionaldehyde, and acetaldehyde are the key species with high OFP and (OH) reactivity.

【Keywords】 industrial boiler; carbonyl compounds; biomass; coal; utility boiler;

【DOI】

【Funds】 National Key R&D Program of China (2018YFC0213904) National Natural Science Foundation of China (41403115) Environmental Protection Public Welfare Project of Guangdong Province (GDEMC-2015-1)

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(Translated by LIU T)

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This Article

ISSN:1000-6923

CN:11-2201/X

Vol 40, No. 02, Pages 573-581

February 2020

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Abstract

  • 1 Materials and methods
  • 2 Results and discussion
  • 3 Conclusions
  • References