Life-Cycle Carbon Footprint Assessment of Coal-fired Power Generation

doi:10.11930/j.issn.1004-9649.202404039

Abstract

Abstract:

Carbon footprint, as an essential tool for quantifying carbon emissions, provides data support for carbon emission reduction in coal-fired power generation. To investigate the electricity carbon footprint of coal-fired units and its influencing factors, actual case calculations and sensitivity analysis were conducted based on the life cycle method. The carbon footprint calculation results indicate that the carbon footprint per unit of grid-connected electricity for a 300 MW coal-fired power generation unit is 0.932 kgCO₂e/kW·h. The primary emission source is coal combustion, accounting for approximately 79%, followed by upstream coal production and processing, accounting for approximately 20%. The comparative analysis of carbon footprint and carbon verification concludes that reducing carbon emissions should not only focus on conventional methods in coal-fired power plants, but also consider reducing emissions in the upstream coal supply stage as an effective solution.

Key words: coal-fired power generation, carbon footprint, life cycle method, greenhouse gases, carbon emissions

Hanxiao LIU, Sike SHAN, Shuzhou WEI, Liyuan YU, Shuai WANG, Meiling LIU, Ying CUI. Life-Cycle Carbon Footprint Assessment of Coal-fired Power Generation[J]. Electric Power, 2024, 57(7): 227-237.

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URL: https://www.electricpower.com.cn/EN/10.11930/j.issn.1004-9649.202404039

https://www.electricpower.com.cn/EN/Y2024/V57/I7/227

Figures/Tables 9

References 46

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数据种类		数值
煤炭（烟煤）	用量/t	3.09×10⁶
	元素碳含量/(tC·t^–1)	0.54
	铁路运输里程/km	868.00
助燃剂（柴油）	用量/t	94.00
助燃剂（柴油）	元素碳含量/(tC·t^–1)	0.86
辅料	工艺水/t	1.69×10⁷
	尿素/t	941.00
	液氨/t	1.15×10³
	石灰石/t	4.80×10³
	各类用油/t	73.00
外购电	外购电/(MW·h)	0
产品	上网电量/(MW·h)	5.95×10⁶
产品	供热量/GJ	1.29×10¹⁰
副产品/废物	煤渣/t	7.30×10⁴
	除尘灰/t	4.62×10⁵
	石膏/t	8.40×10⁴

数据种类		数值
煤炭（烟煤）	用量/t	3.09×10⁶
	元素碳含量/(tC·t^–1)	0.54
	铁路运输里程/km	868.00
助燃剂（柴油）	用量/t	94.00
助燃剂（柴油）	元素碳含量/(tC·t^–1)	0.86
辅料	工艺水/t	1.69×10⁷
	尿素/t	941.00
	液氨/t	1.15×10³
	石灰石/t	4.80×10³
	各类用油/t	73.00
外购电	外购电/(MW·h)	0
产品	上网电量/(MW·h)	5.95×10⁶
产品	供热量/GJ	1.29×10¹⁰
副产品/废物	煤渣/t	7.30×10⁴
	除尘灰/t	4.62×10⁵
	石膏/t	8.40×10⁴

单元过程	排放因子	来源
煤炭开采/(kgCO₂e·kg)^–1	0.499	文献[28]
铁路运输/tCO₂e·(t·km)^–1	10.000	文献[29]
货运/tCO₂e·(t·km)^–1	0.052	文献[30]
外购电/tCO₂e·(MW·h)^–1	0.570	文献[31]
工艺水/(kgCO₂e·kg)^–1	1.905×10^–3	Ecoinvent3.8
尿素/(kgCO₂e·kg)^–1	2.898	Ecoinvent3.8
液氨/(kgCO₂e·kg)^–1	5.316	Ecoinvent3.8
脱硫石灰石生产/(kgCO₂e·kg)^–1	2.816×10^–3	Ecoinvent3.8
特种润滑油/(kgCO₂e·kg)^–1	1.457	Ecoinvent3.8
绝缘油/(kgCO₂e·kg)^–1	1.457	Ecoinvent3.8
柴油生产/(kgCO₂e·kg)^–1	0.853	文献[32]
除尘灰/(kgCO₂e·kg)^–1	–0.216	文献[33]
石膏/(kgCO₂e·kg)^–1	–0.099	文献[34]
粉煤灰/(kgCO₂e·kg)^–1	–0.253	文献[35]

单元过程	排放因子	来源
煤炭开采/(kgCO₂e·kg)^–1	0.499	文献[28]
铁路运输/tCO₂e·(t·km)^–1	10.000	文献[29]
货运/tCO₂e·(t·km)^–1	0.052	文献[30]
外购电/tCO₂e·(MW·h)^–1	0.570	文献[31]
工艺水/(kgCO₂e·kg)^–1	1.905×10^–3	Ecoinvent3.8
尿素/(kgCO₂e·kg)^–1	2.898	Ecoinvent3.8
液氨/(kgCO₂e·kg)^–1	5.316	Ecoinvent3.8
脱硫石灰石生产/(kgCO₂e·kg)^–1	2.816×10^–3	Ecoinvent3.8
特种润滑油/(kgCO₂e·kg)^–1	1.457	Ecoinvent3.8
绝缘油/(kgCO₂e·kg)^–1	1.457	Ecoinvent3.8
柴油生产/(kgCO₂e·kg)^–1	0.853	文献[32]
除尘灰/(kgCO₂e·kg)^–1	–0.216	文献[33]
石膏/(kgCO₂e·kg)^–1	–0.099	文献[34]
粉煤灰/(kgCO₂e·kg)^–1	–0.253	文献[35]

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