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Estimated HCFC-22 emissions for 1990–2050 in China and the increasing contribution to global emissions
Abstract Chlorodifluoromethane (CHClF2, HCFC-22) is a widely used refrigerant and foaming agent that is not only an ozone-depleting substance (ozone depletion potential (ODP), 0.04) but also a greenhouse gas (global warming potential (GWP), 1780). A comprehensive historical emission inventory for 1990–2014 was produced using a bottom-up method, and a projection through to 2050 was made for China. The results demonstrated that historical emissions increased sharply from 0.2 Gg/yr in 1990 to 127.2 Gg/yr in 2014. Room air-conditioners (RACs), industrial and commercial refrigeration (ICR), and extruded polystyrene (XPS) were three primary emission sources, and accounted for an average of 95.4% of the total emissions over the period studied. The percentage of global HCFC-22 emissions originating from China significantly increased from 0.1% in 1990 to 31.6% in 2012, with an average growth rate of 1.4% per year. Under the Montreal Protocol phasing-out (MPPO) scenario, future emissions were expected to reach a peak of 133.5 Gg/yr in 2016 and then continuously decline to 10.2 Gg/yr in 2050. The accumulative reduction for 2015–2050 would be 5533.8 Gg (equivalent to 221.4 CFC-11-eq Gg and 9850.1 CO2-eq Tg), which is approximately equivalent to the total CO2 emission for China in 2012 (9900 Tg) (Olivier et al., 2013), compared with the no Montreal Protocol scenario (NMP). Under the MPPO scenario, two cases were analyzed to explore the future emission ranges in China. A comparison between the two cases implied that the choice of emission reduction policy will have a considerable impact on HCFC-22 emissions.
Highlights HCFC-22 emission in China was comprehensively estimated using a bottom-up method. The contribution of China to global HCFC-22 emission during 1990–2012 was increasing. The potential emissions were revealed for 2015–2050 under the MPPO scenario. HCFC-22 emission would be reduced significantly by implementation in China.
Estimated HCFC-22 emissions for 1990–2050 in China and the increasing contribution to global emissions
Abstract Chlorodifluoromethane (CHClF2, HCFC-22) is a widely used refrigerant and foaming agent that is not only an ozone-depleting substance (ozone depletion potential (ODP), 0.04) but also a greenhouse gas (global warming potential (GWP), 1780). A comprehensive historical emission inventory for 1990–2014 was produced using a bottom-up method, and a projection through to 2050 was made for China. The results demonstrated that historical emissions increased sharply from 0.2 Gg/yr in 1990 to 127.2 Gg/yr in 2014. Room air-conditioners (RACs), industrial and commercial refrigeration (ICR), and extruded polystyrene (XPS) were three primary emission sources, and accounted for an average of 95.4% of the total emissions over the period studied. The percentage of global HCFC-22 emissions originating from China significantly increased from 0.1% in 1990 to 31.6% in 2012, with an average growth rate of 1.4% per year. Under the Montreal Protocol phasing-out (MPPO) scenario, future emissions were expected to reach a peak of 133.5 Gg/yr in 2016 and then continuously decline to 10.2 Gg/yr in 2050. The accumulative reduction for 2015–2050 would be 5533.8 Gg (equivalent to 221.4 CFC-11-eq Gg and 9850.1 CO2-eq Tg), which is approximately equivalent to the total CO2 emission for China in 2012 (9900 Tg) (Olivier et al., 2013), compared with the no Montreal Protocol scenario (NMP). Under the MPPO scenario, two cases were analyzed to explore the future emission ranges in China. A comparison between the two cases implied that the choice of emission reduction policy will have a considerable impact on HCFC-22 emissions.
Highlights HCFC-22 emission in China was comprehensively estimated using a bottom-up method. The contribution of China to global HCFC-22 emission during 1990–2012 was increasing. The potential emissions were revealed for 2015–2050 under the MPPO scenario. HCFC-22 emission would be reduced significantly by implementation in China.
Estimated HCFC-22 emissions for 1990–2050 in China and the increasing contribution to global emissions
Li, Zhifang (author) / Bie, Pengju (author) / Wang, Ziyuan (author) / Zhang, Zhaoyang (author) / Jiang, Hanyu (author) / Xu, Weiguang (author) / Zhang, Jianbo (author) / Hu, Jianxin (author)
Atmospheric Environment ; 132 ; 77-84
2016-02-24
8 pages
Article (Journal)
Electronic Resource
English
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