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Author:

Yao, Z. (Yao, Z..) | Wu, Y. (Wu, Y..) | Du, Z. (Du, Z..) | Wang, X. (Wang, X..) | An, X. (An, X..) | Nie, L. (Nie, L..)

Indexed by:

Scopus

Abstract:

Foreign experience in reducing the emissions of volatile organic compounds shows that the edible vegetable oil processing industry, as the main user of the solvents, needs to control the emissions of VOCs. In order to grasp the domestic VOCs emission characteristics and control strategies in edible vegetable oil processing industry, two typical enterprises in soybean oil processing industry were selected based on the data of the second national survey of pollution sources. The VOCs emission points of typical enterprises were identified, and the emission intensity and composition of the main emission points were sampled and analyzed. Combined with the Maximum Incremental Reactivity method, the ozone generation potential of the industry was calculated. The results show that there are high concentration VOCs emission nodes in the crude oil leaching process section, refining process section and supporting sewage treatment plant of the two representative enterprises. From the perspective of emission intensity, the VOCs emission concentration of each sampling node of the two companies is in the range of 42.3-5134.3 mg/m3. The highest point of VOCs concentration is the extraction process of paraffin oil absorption tower exhaust cylinder, and the concentration levels are 5134.3 and 673.2 mg/m3, respectively. The detected components at each sampling point in the extract process segment are mainly for n-hexane, 3-methyl pentane, 2-methyl cyclopentane, crotonaldehyde species. The oil refining process segment has relatively high hexane and its isomers and above 2-crotonaldehyde same proportion is higher, and also has pentane, ethane, ethylene, 1-butylene, acrolein, benzene and toluene and other species. The ozone formation potential of the extract process section and refining process sections of the 'extract + refining' enterprise is 2.64 and 4.31 g/g, respectively, and 2-butenal is the primary active species. At present, domestic soybean oil processing enterprises still have great potential in reducing VOCs emissions. It is recommended to clarify the technical routes and emission standards of industry pollution prevention and control according to the emission characteristics, guide enterprises to control their own VOCs emissions, and promote industry emission reduction. © 2022, Editorial Board, Research of Environmental Sciences. All right reserved.

Keyword:

Volatile organic compounds (VOCs) Emission characteristics Ozone formation potential (OFP) Edible soybean oil processing

Author Community:

  • [ 1 ] [Yao Z.]National Urban Environmental Pollution Control Engineering Research Center, Beijing Key Laboratory of Urban Atmospheric Volatile Organic Compounds Pollution Control and Application, Beijing Municipal Research Institute of Eco-Environmental Protection, Beijing, 100037, China
  • [ 2 ] [Wu Y.]Tianjin Eco-Environmental Monitoring Center, Tianjin, 300191, China
  • [ 3 ] [Du Z.]College of Environmental and Energy Engineering, Beijing University of Technology, Beijing, 100124, China
  • [ 4 ] [Wang X.]Tianjin Eco-Environmental Monitoring Center, Tianjin, 300191, China
  • [ 5 ] [An X.]National Urban Environmental Pollution Control Engineering Research Center, Beijing Key Laboratory of Urban Atmospheric Volatile Organic Compounds Pollution Control and Application, Beijing Municipal Research Institute of Eco-Environmental Protection, Beijing, 100037, China
  • [ 6 ] [Nie L.]National Urban Environmental Pollution Control Engineering Research Center, Beijing Key Laboratory of Urban Atmospheric Volatile Organic Compounds Pollution Control and Application, Beijing Municipal Research Institute of Eco-Environmental Protection, Beijing, 100037, China

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Source :

Research of Environmental Sciences

ISSN: 1001-6929

Year: 2022

Issue: 6

Volume: 35

Page: 1388-1397

Cited Count:

WoS CC Cited Count: 0

SCOPUS Cited Count:

ESI Highly Cited Papers on the List: 0 Unfold All

WanFang Cited Count:

Chinese Cited Count:

30 Days PV: 3

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