Purpose: The aim of this paper is to provide methods to find the emission source and estimate the amount of waste gas emissions in the electricity coal supply chain, establish the model of the environmental impact (burden) in the electricity coal supply chain, detect the critical factor which causes significant environmental impact, and then identify the key control direction and reduce amount of environmental pollution in the electricity coal supply chain.\ud\udDesign/methodology/approach: In this context, life cycle inventory and life cycle assessment of China’s electricity coal were established in three difference stages: coal mining, coal transportation, and coal burning. Then the outcomes were analyzed with the aim to reduce waste gases emissions’ environmental impact in the electricity coal supply chain from the perspective of sensitivity analysis.\ud\udFindings: The results and conclusion are as follow: (1) In terms of total waste gas emissions in electricity coal supply chain, CO2 is emitted in the greatest quantity, accounting for 98-99 wt% of the total waste gas emissions. The vast majority of the CO2, greater than 93%, is emitted from the power plant when the coal is combusted. (2) Other than CO2, the main waste gas is CH4, SO2 and so on. CH4 is mainly emitted from Coal Bed Methane (CBM), so the option is to consider capturing some of the CH4 from underground mines for an alternative use. SO2 is mainly emitted from power plant when the coal is combusted. (3) The environmental burden of coal burning subsystem is greatest, followed by the coal mining subsystem, and finally the coal transportation subsystem. Improving the coal-burning efficiency of coal-fired power plant in electricity coal supply chain is the most effective way to reduce the environmental impact of waste gas emissions. (4) Of the three subsystems examined (coal mining, coal transportation, and coal burning), transportation requires the fewest resources and has the lowest waste gas emissions. However, the energy consumption for this subsystem is significant (excluding the mine mouth case), and transportation distance is found to have a substantial effect on the oil consumption and non-coal energy consumption. (5) In electricity coal supply chain, the biggest environmental impact of waste gas emissions is GWP, followed by EP, AP, POCP and ODP, and regional impact is greater than the global impact.\ud\udPractical implications: The model and methodology established in this paper could be used for environmental impact assessment of waste gas emissions in electricity coal supply chain and sensitivity analysis in China, and it could supply reference and example for similar researches. The data information on life cycle inventory, impact assessment and sensitivity analysis could supply theory and data reference for waste gas emissions control in electricity coal supply chain.\ud\udOriginality/value: To the best of our knowledge, this is the first time to study the environmental influence of electricity coal supply chain by employing a LCA approach from life cycle of electricity coal
展开▼
机译:目的:本文的目的是提供寻找电煤供应链中的排放源并估算废气排放量的方法,建立电煤供应链中的环境影响(负担)模型,检测排放源的方法。造成重大环境影响的关键因素,然后确定电煤供应链中的关键控制方向并减少环境污染的数量。\ ud \ ud设计/方法/方法:在这种背景下,中国的生命周期清单和生命周期评估电煤分为三个阶段:煤炭开采,煤炭运输和燃煤。然后从敏感性分析的角度对结果进行了分析,目的是减少电煤供应链中的废气排放对环境的影响。\ ud \ ud结果:结果和结论如下:(1)在总浪费方面在电煤供应链中的瓦斯排放中,CO2的排放量最大,占废气排放总量的98-99 wt%。燃煤时,绝大部分二氧化碳(大于93%)从发电厂排放。 (2)除CO2外,主要废气为CH4,SO2等。 CH4主要是从煤层气(CBM)排放的,因此选择是考虑从地下矿山中捕获一些CH4用作替代用途。燃煤时,SO2主要从发电厂排放。 (3)燃煤子系统的环境负荷最大,其次是采煤子系统,最后是输煤子系统。在电力煤炭供应链中提高燃煤电厂的燃煤效率是减少废气排放对环境影响的最有效方法。 (4)在考察的三个子系统(煤矿开采,煤炭运输和煤炭燃烧)中,运输需要最少的资源,废气排放也最少。但是,此子系统的能耗非常大(不包括矿井口情况),并且发现运输距离对耗油量和非煤炭能耗有很大影响。 (5)在电煤供应链中,废气排放对环境的最大影响是GWP,其次是EP,AP,POCP和ODP,区域影响大于全球影响。\ ud \ ud实际意义:模型和方法本文建立的模型可用于我国电煤供应链废气排放的环境影响评价和敏感性分析,可为类似研究提供参考和实例。有关生命周期清单,影响评估和敏感性分析的数据信息可为电煤供应链中的废气排放控制提供理论和数据参考。\ ud \ ud原始数据/价值:据我们所知,这是第一次从生命电煤的生命周期出发,采用生命周期评价法研究电煤供应链的环境影响
展开▼