Thermodynamic analysis of a combined heat and power system with CO2 utilization based on co-gasification of biomass and coal

Po Chih Kuo, Wei Wu

研究成果: Article同行評審

57 引文 斯高帕斯(Scopus)

摘要

In this article, a co-gasification system blending coal and biomass is examined in the Aspen Plus environment in terms of energy conversion efficiency (ECE) and exergy efficiency (EE). Although the percentage of raw wood (RW), torrefied wood (TW) and coal in steam co-gasification is one of the most important parameters that affect the gasification process, the addition of CO2 could effectively improve ECE and EE while the steam-to-carbon ratio (S/C) is adjusted at the carbon boundary point (CBP). The optimum operating conditions such as S/C and CO2 supply ratio, are determined by solving a series of constrained optimization algorithms for maximizing ECE and EE. A combined heat and power (CHP) system using the maximum waste heat recovery and Rankine cycle is illustrated to assess performance in terms of power generation and CO2 utilization. The results show that the total power generation by feeding the TW-based fuel blend of 40wt% TW and 60wt% coal is increased by 8.43%, as compared to that of the RW-based fuel blend of 40wt% RW and 60wt% coal. Compared with 100wt% coal fuel, the TW-based fuel can significantly reduce CO2 specific emission by 38.23%.

原文English
頁(從 - 到)201-214
頁數14
期刊Chemical Engineering Science
142
DOIs
出版狀態Published - 2016 3月 13

All Science Journal Classification (ASJC) codes

  • 化學 (全部)
  • 化學工程 (全部)
  • 工業與製造工程

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