The regulated pollutants （CO,HC and NOx） and unregulated pollutants （volatile organic compounds and carbonyl compounds）,emitted from a dual fuel vehicle fueled with gasoline and E10 fuel,are measured under a trans...The regulated pollutants （CO,HC and NOx） and unregulated pollutants （volatile organic compounds and carbonyl compounds）,emitted from a dual fuel vehicle fueled with gasoline and E10 fuel,are measured under a transient cycle and steady modes.The impacts of a three-way catalyst （TWC） are investigated for the two types of fuels.The measured results show that NOx and acetaldehyde emitted from the E10-fueled car are much more than that from the gasoline-fueled car under the same modes.On the basis of maximum incremental reactivity （MIR） factors and emissions of organic gases,the ozone specific reactivity of the tailpipe gases are evaluated.展开更多
Using the 3-year observational data from ChinaFlux （Chinese Terrestrial Ecosystem Flux Research Network）, we studied the gas regulation flux dynamics and cumulative process of gas regulation value in Qianyanzhou mid...Using the 3-year observational data from ChinaFlux （Chinese Terrestrial Ecosystem Flux Research Network）, we studied the gas regulation flux dynamics and cumulative process of gas regulation value in Qianyanzhou middle subtropical plantation （QYF） and Changbai Mountain temperate mixed forest （CBF）. The gas regulation service was differentiated into vegetation gas regulation service and net ecosystem gas regulation service. Carbon tax approach, reforestation cost approach and industrial oxygen approach were employed to calculate gas regulation value. Results show that there was significant seasonal variation in vegetation gas regulation flux. Daily CO2 uptake fluxes averaged 82.00 kg·ha^-·d^-1 and 59.37 kg·ha^-·d^-1 and the corresponding 02 emission fluxes were 59.65 kg·ha^-·d^-1 and 43.19 kg·ha^-·d^-1 for QYF and CBF, respectively. The cumulative curves of vegetation gas regulation value always followed a sigmoid shape, and the annual gas regulation value produced by vegetation was RMB 14342.69 yuan·ha^-1 and RMB 10384.18 yuan·ha^-1 for both QYF and CBF, respectively. In terms of monthly net ecosystem gas regulation service, QYF appeared as a CO2 sink and O2 source for the whole year, while CBF appeared to be a CO2 sink and O2 source mainly in the period between May and September. The cumulative curves of net ecosystem gas regulation value presented a sigmoid （＂S＂） shape for QYF, while a unimodal type curve for CBF. The annual net ecosystem gas regulation value was 8470.52 yuan·ha^-1 and 5091.98yuan·ha^-1 for QYF and CBF, respectively. The economic value of both the vegetation gas regulation service and net ecosystem gas regulation service were mainly produced between May and October.展开更多
本文基于重组竹地板、普竹地板两种竹产品生命周期碳足迹的核算,进行碳减排潜力分析。结果表明,普竹地板和重组竹地板的碳足迹分别为30.7228、-70.3857 kg CO_(2)-eq·m^(-3);重组竹地板的主要碳排放环节是加工过程,其对碳足迹的贡...本文基于重组竹地板、普竹地板两种竹产品生命周期碳足迹的核算,进行碳减排潜力分析。结果表明,普竹地板和重组竹地板的碳足迹分别为30.7228、-70.3857 kg CO_(2)-eq·m^(-3);重组竹地板的主要碳排放环节是加工过程,其对碳足迹的贡献率为66.0%;普竹地板的主要排放环节是附加物碳排放,其对碳足迹的贡献率为65.0%。运输过程的碳排放对两种竹地板碳足迹的贡献率较低,均在7%以内。不同减排情景下,重组竹地板在情景五(运输距离为24 km,生产效率提升15%)的情况下碳减排量最大,减排后的碳足迹为-104.6580 kg CO_(2)-eq·m^(-3);普竹地板在情景六(运输距离为24 km,生产效率提升15%,包装质量减少20%)的情况下碳减排量最大,减排后的碳足迹为-5.7611 kg CO_(2)-eq·m^(-3)。以上研究可为竹企业确定减排方向提供参考。展开更多
基金Sponsored by the National Natural Science Foundation of China (40805053)
文摘The regulated pollutants （CO,HC and NOx） and unregulated pollutants （volatile organic compounds and carbonyl compounds）,emitted from a dual fuel vehicle fueled with gasoline and E10 fuel,are measured under a transient cycle and steady modes.The impacts of a three-way catalyst （TWC） are investigated for the two types of fuels.The measured results show that NOx and acetaldehyde emitted from the E10-fueled car are much more than that from the gasoline-fueled car under the same modes.On the basis of maximum incremental reactivity （MIR） factors and emissions of organic gases,the ozone specific reactivity of the tailpipe gases are evaluated.
基金Chinese Terrestrial Ecosystem Flux Observational Research Network(ChinaFlux) for providing the observational data
文摘Using the 3-year observational data from ChinaFlux （Chinese Terrestrial Ecosystem Flux Research Network）, we studied the gas regulation flux dynamics and cumulative process of gas regulation value in Qianyanzhou middle subtropical plantation （QYF） and Changbai Mountain temperate mixed forest （CBF）. The gas regulation service was differentiated into vegetation gas regulation service and net ecosystem gas regulation service. Carbon tax approach, reforestation cost approach and industrial oxygen approach were employed to calculate gas regulation value. Results show that there was significant seasonal variation in vegetation gas regulation flux. Daily CO2 uptake fluxes averaged 82.00 kg·ha^-·d^-1 and 59.37 kg·ha^-·d^-1 and the corresponding 02 emission fluxes were 59.65 kg·ha^-·d^-1 and 43.19 kg·ha^-·d^-1 for QYF and CBF, respectively. The cumulative curves of vegetation gas regulation value always followed a sigmoid shape, and the annual gas regulation value produced by vegetation was RMB 14342.69 yuan·ha^-1 and RMB 10384.18 yuan·ha^-1 for both QYF and CBF, respectively. In terms of monthly net ecosystem gas regulation service, QYF appeared as a CO2 sink and O2 source for the whole year, while CBF appeared to be a CO2 sink and O2 source mainly in the period between May and September. The cumulative curves of net ecosystem gas regulation value presented a sigmoid （＂S＂） shape for QYF, while a unimodal type curve for CBF. The annual net ecosystem gas regulation value was 8470.52 yuan·ha^-1 and 5091.98yuan·ha^-1 for QYF and CBF, respectively. The economic value of both the vegetation gas regulation service and net ecosystem gas regulation service were mainly produced between May and October.
文摘本文基于重组竹地板、普竹地板两种竹产品生命周期碳足迹的核算,进行碳减排潜力分析。结果表明,普竹地板和重组竹地板的碳足迹分别为30.7228、-70.3857 kg CO_(2)-eq·m^(-3);重组竹地板的主要碳排放环节是加工过程,其对碳足迹的贡献率为66.0%;普竹地板的主要排放环节是附加物碳排放,其对碳足迹的贡献率为65.0%。运输过程的碳排放对两种竹地板碳足迹的贡献率较低,均在7%以内。不同减排情景下,重组竹地板在情景五(运输距离为24 km,生产效率提升15%)的情况下碳减排量最大,减排后的碳足迹为-104.6580 kg CO_(2)-eq·m^(-3);普竹地板在情景六(运输距离为24 km,生产效率提升15%,包装质量减少20%)的情况下碳减排量最大,减排后的碳足迹为-5.7611 kg CO_(2)-eq·m^(-3)。以上研究可为竹企业确定减排方向提供参考。
