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Progress in biomass torrefaction: Principles, applications and challenges
Progress in Energy and Combustion Science ( IF 29.5 ) Pub Date : 2021-01-01 , DOI: 10.1016/j.pecs.2020.100887
Wei-Hsin Chen , Bo-Jhih Lin , Yu-Ying Lin , Yen-Shih Chu , Aristotle T. Ubando , Pau Loke Show , Hwai Chyuan Ong , Jo-Shu Chang , Shih-Hsin Ho , Alvin B. Culaba , Anélie Pétrissans , Mathieu Pétrissans

Abstract The development of biofuels has been considered as an important countermeasure to abate anthropogenic CO2 emissions, suppress deteriorated atmospheric greenhouse effect, and mitigate global warming. To produce biofuels from biomass, thermochemical conversion processes are considered as the most efficient routes wherein torrefaction has the lowest global warming potential. Combustion is the easiest way to consume biomass, which can be burned alone or co-fired with coal to generate heat and power. However, solid biomass fuels are not commonly applied in the industry due to their characteristics of hygroscopic nature and high moisture content, low bulk density and calorific value, poor grindability, low compositional homogeneity, and lower resistance against biological degradation. In recently developing biomass conversion technologies, torrefaction has attracted much attention since it can effectively upgrade solid biomass and produce coal-like fuel. Torrefaction is categorized into dry and wet torrefaction; the former can further be split into non-oxidative and oxidative torrefaction. Despite numerous methods developed, non-oxidative torrefaction, normally termed torrefaction, has a higher potential for practical applications and commercialization when compared to other methods. To provide a comprehensive review of the progress in biomass torrefaction technologies, this study aims to perform an in-depth literature survey of torrefaction principles, processes, systems, and to identify a current trend in practical torrefaction development and environmental performance. Moreover, the encountered challenges and perspectives from torrefaction development are underlined. This state-of-the-art review is conducive to the production and applications of biochar for resource utilization and environmental sustainability. To date, several kinds of reactors have been developed, while there is still no obviously preferred one as they simultaneously have pros and cons. Integrating torrefaction with other processes such as co-firing, gasification, pyrolysis, and ironmaking, etc., makes it more efficient and economically feasible in contrast to using a single process. By virtue of capturing carbon dioxide during the growth stage of biomass, negative carbon emissions can even be achieved from torrefied biomass.

中文翻译:

生物质烘焙的进展:原理、应用和挑战

摘要 生物燃料的发展被认为是减少人为CO2排放、抑制大气温室效应恶化、减缓全球变暖的重要对策。为了从生物质生产生物燃料,热化学转化过程被认为是最有效的途径,其中烘焙具有最低的全球变暖潜力。燃烧是最简单的生物质消耗方式,生物质可以单独燃烧,也可以与煤混合燃烧来产生热能和电力。然而,固体生物质燃料由于具有吸湿性、含水量高、容重和热值低、可磨性差、成分均匀性低、抗生物降解能力低等特点,在工业上应用并不普遍。在最近开发的生物质转化技术中,焙干能有效地提质固体生物质,生产类似煤的燃料,因此备受关注。烘焙分为干式和湿式烘焙;前者可进一步分为非氧化性烘焙和氧化性烘焙。尽管开发了许多方法,但与其他方法相比,非氧化性烘焙(通常称为烘焙)具有更高的实际应用和商业化潜力。为了全面回顾生物质烘焙技术的进展,本研究旨在对烘焙原理、过程、系统进行深入的文献调查,并确定实际烘焙发展和环境性能的当前趋势。此外,还强调了烘焙发展中遇到的挑战和前景。这种最新的审查有利于生物炭的生产和应用,以实现资源利用和环境可持续性。迄今为止,已经开发了几种反应器,但仍然没有明显优选的一种,因为它们同时具有优点和缺点。与使用单一过程相比,将烘焙与其他过程(如混烧、气化、热解和炼铁等)相结合,使其更高效、更经济可行。通过在生物质的生长阶段捕获二氧化碳,甚至可以从烘焙生物质中实现负碳排放。虽然仍然没有明显的首选,因为它们同时具有优点和缺点。与使用单一过程相比,将烘焙与其他过程(如混烧、气化、热解和炼铁等)相结合,使其更高效、更经济可行。通过在生物质的生长阶段捕获二氧化碳,甚至可以从烘焙生物质中实现负碳排放。虽然仍然没有明显的首选,因为它们同时具有优点和缺点。与使用单一过程相比,将烘焙与其他过程(如混烧、气化、热解和炼铁等)相结合,使其更高效、更经济可行。通过在生物质的生长阶段捕获二氧化碳,甚至可以从烘焙生物质中实现负碳排放。
更新日期:2021-01-01
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