Bio-energy with carbon capture and storage (BECCS): Opportunities for performance improvement
Bio-energy with carbon capture and storage (BECCS): Opportunities for performance improvement
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DOI：
10.1016/j.fuel.2017.10.100
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发表时间：
2018-02-01
期刊：
影响因子：
7.4
通讯作者：
Mac Dowell, Niall
中科院分区：
文献类型：
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作者：
Bui, Mai;Fajardy, Mathilde;Mac Dowell, Niall
本研究评估了一个500兆瓦的粉末燃料BECCS系统的性能。绩效矩阵是用来评估BECCS在能源效率、碳强度和污染物排放方面的绩效改进机会的。针对变量（i）煤类型（高/中硫含量）、（ii）生物质类型（麦草和木屑）、（iii）水分含量和（iv）生物质共烧比例%分析燃料性质的影响。据观察，生物质的共烧增加了可用于从废气中回收的废热的数量和质量。在BECCS系统中提高能源效率的机会包括提高热回收和使用高性能的CO2捕集溶剂，如双相材料。实施这些方法将发电效率从31%（HHV）（常规MEA系统）提高到38%（HHV）（使用具有热回收的先进双相溶剂）。此外，发电效率被发现影响碳强度每年的基础上和BECCS系统的年容量（负荷因子）。通过增加生物质共烧%或使用低硫煤，实现了SOX排放的显著减少。
This study evaluates the performance of a 500 MW pulverised fuel BECCS system. A performance matrix is developed to assess the opportunities for BECCS performance improvement in terms of: energy efficiency, carbon intensity, and pollutant emissions. The effect of fuel properties was analysed for variable (i) coal type (high/medium sulphur content), (ii) biomass type (wheat straw and wood chips), (iii) moisture content, and (iv) biomass co-firing proportion %. It was observed that the co-firing of biomass increased the quantity and quality of waste heat available for recovery from the exhaust gas. The opportunities to improve energy efficiency in the BECCS system include enhancing heat recovery and using high performance solvents for CO2 capture, such as biphasic materials. Implementing these approaches increased the power generation efficiency from 31% (HHV) (conventional MEA system) to 38% (HHV) (using an advanced biphasic solvent with heat recovery). Furthermore, power generation efficiency was found to influence the carbon intensity on an annual basis and annual capacity (load factor) of the BECCS system. Significant reductions to SOX emissions were achieved by increasing biomass co-firing % or using low sulphur coal.