Rising Perfluorocyclobutane (PFC-318, c -C 4 F 8 ) Emissions in China from 2011 to 2020 Inferred from Atmospheric Observations.

Autor: Wang Y; Department of Atmospheric and Oceanic Sciences & Institute of Atmospheric Sciences, Fudan University, Shanghai 200438, China.; Shanghai Frontiers Science Center of Atmosphere-Ocean Interaction & Key Laboratory of Polar Atmosphere-Ocean-Ice System for Weather and Climate, Ministry of Education & Shanghai Key Laboratory of Ocean-Land-Atmosphere Boundary Dynamics and Climate Change, Shanghai 200438, China., An M; Center for Global Change Science, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, United States.; College of Environmental Sciences and Engineering, Peking University, Beijing 100871, China.; School of Chemistry, University of Bristol, Bristol BS8 1TS, U.K., Western LM; School of Chemistry, University of Bristol, Bristol BS8 1TS, U.K.; Global Monitoring Laboratory, National Oceanic and Atmospheric Administration, Boulder, Colorado 80305, United States., Prinn RG; Center for Global Change Science, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, United States., Hu J; College of Environmental Sciences and Engineering, Peking University, Beijing 100871, China., Zhao X; College of Environmental Sciences and Engineering, Peking University, Beijing 100871, China., Rigby M; Center for Global Change Science, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, United States.; School of Chemistry, University of Bristol, Bristol BS8 1TS, U.K., Mühle J; Scripps Institution of Oceanography, University of California San Diego, La Jolla, California 92083, United States., Vollmer MK; Laboratory for Air Pollution and Environmental Technology, Empa, Swiss Federal Laboratories for Materials Science and Technology, Dubendorf 8600, Switzerland., Weiss RF; Scripps Institution of Oceanography, University of California San Diego, La Jolla, California 92083, United States., Yao B; Department of Atmospheric and Oceanic Sciences & Institute of Atmospheric Sciences, Fudan University, Shanghai 200438, China.; Meteorological Observation Centre of China Meteorological Administration (MOC/CMA), Beijing 100081, China.; National Observations and Research Station for Wetland Ecosystems of the Yangtze Estuary, Fudan University, Shanghai 201112, China.
Jazyk: angličtina
Zdroj: Environmental science & technology [Environ Sci Technol] 2024 Jul 02; Vol. 58 (26), pp. 11606-11614. Date of Electronic Publication: 2024 Jun 14.
DOI: 10.1021/acs.est.3c10325
Abstrakt: Global atmospheric emissions of perfluorocyclobutane ( c -C 4 F 8 , PFC-318), a potent greenhouse gas, have increased rapidly in recent years. Combining atmospheric observations made at nine Chinese sites with a Lagrangian dispersion model-based Bayesian inversion technique, we show that PFC-318 emissions in China grew by approximately 70% from 2011 to 2020, rising from 0.65 (0.54-0.72) Gg year -1 in 2011 to 1.12 (1.05-1.19) Gg year -1 in 2020. The PFC-318 emission increase from China played a substantial role in the overall increase in global emissions during the study period, contributing 58% to the global total emission increase. This growth predominantly originated in eastern China. The regions with high emissions of PFC-318 in China overlap with areas densely populated with polytetrafluoroethylene (PTFE) factories, implying that fluoropolymer factories are important sources of PFC-318 emissions in China. Our investigation reveals an emission factor of approximately 3.02 g of byproduct PFC-318 emissions per kg of hydrochlorofluorocarbon-22 (HCFC-22) feedstock use in the production of tetrafluoroethylene (TFE) (for PTFE production) and hexafluoropropylene (HFP) if we assume all HCFC-22 produced for feedstock uses in China are pyrolyzed to produce PTFE and HFP. Further facility-level sampling and analysis are needed for a more precise evaluation of emissions from these factories.
Databáze: MEDLINE