Economic and environmental assessment of biomass coupled coal-fired power generation

doi:10.11949/0438-1157.20211165

Abstract

Abstract:

This paper establishes an economic and environmental system evaluation model for biomass direct combustion, biomass-coupled coal-fired power generation, and coal-fired power generation. Four types of biomass pretreatment methods are compared. This work quantifies the supply chain costs of different densified solid biomass fuels, levelized cost of electricity (LCOE), emission intensity (EI), marginal abatement costs (MAC) and the profit rate of cost (PRC) considering carbon trading of different power generation strategies. It is found that biomass coupled coal-fired power generation is a lower-carbon biomass utilization path than direct-fired power generation, and can take advantage of the scale effect, i.e., as the power plant scale increase, the LCOE decreases and the PRC increases, respectively, while the direct-fired power generation is the opposite. In comparison with coal-fired power generation, biomass coupled coal-fired power generation has lower LCOE and can benefit from carbon trading, thus has higher PRC. Therefore, biomass coupled coal-fired power generation is an effective way for coal phase-down program.

Key words: biomass coupled coal-fired power generation, biomass pre-treatment, economic and environmental impacts evaluation, coal phase-down, carbon emissions, marginal abatement cost

摘要：

建立了生物质直燃、生物质耦合燃煤发电及煤电的经济及环境影响评估模型，对比了四种不同的生物质预处理技术，量化了生物质固体燃料的供应链成本，不同发电策略的度电成本，电力碳排放强度，边际减排成本，以及考虑碳交易情况下的电厂成本收益率。研究发现，生物质耦合燃煤发电较生物质直燃发电是更为低碳的生物质利用路径，且可利用电厂的规模效应，即随着规模增大度电成本降低，成本利润率上升，而直燃发电相反。与煤电相比，耦合发电的度电成本更低，且可受益于碳交易，成本利润率更高。因此，生物质耦合燃煤发电是具有经济与环境效益的煤电淘汰方案。

关键词: 生物质耦合燃煤发电, 生物质预处理方案对比, 经济环境影响评估, 煤电淘汰方案, 碳排放, 边际减排成本

CLC Number:

TK 6

Huimin YUN, Jianjun DAI, Hui LI, Xiaotao BI. Economic and environmental assessment of biomass coupled coal-fired power generation[J]. CIESC Journal, 2021, 72(12): 6311-6327.

云慧敏, 代建军, 李辉, 毕晓涛. 生物质耦合燃煤发电经济环境效益评估[J]. 化工学报, 2021, 72(12): 6311-6327.

Figures/Tables 4

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