Research progress in coke formation characteristics of bio-oil during its non-catalytic thermal conversion process

doi:10.16085/j.issn.1000-6613.2021-0850

Abstract

Abstract:

Coke is easy to be formed during thermal treatment of bio-oil, which is one of the bottleneck problems that hinder the large-scale use of bio-oil. Therefore, the knowledge about the coke formation of bio-oil during its thermal treatment is the foundation for the efficient thermochemical use of bio-oil. In this paper, the current research progress of coke formation from the bio-oil pyrolysis process is reviewed from the angles of key reaction parameters (temperature, heating rate, atmosphere, pressure, ash content), bio-oil chemical composition, interactions among bio-oil organic components, and free radical reaction characteristics. This paper analyzes the influences of the key operating parameters on the coking behaviors of bio-oil during its thermal treatment, and also summarizes the coke formation from the different components of bio-oil and the coking behaviors of bio-oil affected by the interaction among bio-oil components. Furthermore, in view of coke formation mechanism of bio-oil and the physical and chemical properties of coke, the potential utilization of the coke as fuel and carbon material is summarized. Finally, it is pointed out that clarifying the coke formation mechanism of bio-oil required further research from the perspective of the interaction mechanism among bio-oil components and the free radical reactions mechanism. This paper provides a theoretical reference for realizing high-efficiency thermal utilization of bio-oil.

Key words: bio-oil, coke formation, pyrolysis, carbon materials, radical

摘要：

生物油在受热条件下极易结焦，结焦是影响生物油规模化利用的重要因素之一，因此深入理解生物油受热结焦特性是实现生物油高效热转化利用的基础。本文从生物油热解过程的关键反应参数（温度、升温速率、气氛、压力、灰分）、生物油化学成分、生物油有机组分间交互作用、自由基反应特性等方面综述了生物油受热结焦特性相关研究进展，总结了反应参数对生物油热解结焦反应网络的影响，梳理了生物油各特征组分单独热解结焦及特征组分间交互作用对结焦特性的影响机制，并基于生物油结焦机理和焦炭的物化特性，总结了通过定向调控生物油结焦反应过程，将焦炭作为燃料和炭材料的潜在利用途径。最后，指出了明晰生物油受热结焦机理还需从生物油组分间交互作用机制和自由基反应机理的角度进一步探究。本文为实现生物油高效热转化利用提供了理论参考和借鉴。

关键词: 生物油, 结焦, 热解, 炭材料, 自由基

CLC Number:

XIONG Zhe, DENG Wei, LIU Jia, WANG Xuepeng, XU Jun, JIANG Long, SU Sheng, WANG Yi, HU Song, XIANG Jun. Research progress in coke formation characteristics of bio-oil during its non-catalytic thermal conversion process[J]. Chemical Industry and Engineering Progress, 2022, 41(4): 1802-1813.

熊哲, 邓伟, 刘佳, 汪雪棚, 徐俊, 江龙, 苏胜, 汪一, 胡松, 向军. 生物油非催化热转化过程中受热结焦特性研究进展[J]. 化工进展, 2022, 41(4): 1802-1813.

Figures/Tables 2

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