生物质与煤(共)热解/气化过程中挥发分-半焦交互作用研究与进展

Research and progress of volatile-char interaction during biomass and coal(co-)pyrolysis/gasification process

生物质和煤协同热化学转化是实现非化石能源和化石能源耦合高效利用的技术手段,对实现“双碳”目标具有重要现实意义。基于生物质等含碳燃料高挥发分组成和富氧特性,热化学转化过程不可避免地发生挥发分-半焦交互作用并影响原料性质和设备过程参数。综述了生物质与煤(共)热解/气化过程中挥发分-半焦交互作用的研究进展,总结了交互作用对挥发分的催化裂解规律、对半焦结构与性质的影响及生物质和煤协同热化学转化下的解耦研究思路三方面具体内容。针对目前挥发分-半焦交互作用机制解析过程所采用的研究方法及思路,提出了新的见解并对未来交互作用的重点研究方向进行了展望,以期为进一步认识交互作用的物理化学本质提供理论指导。

The synergistic thermochemical conversion of biomass and coal is a technical means to realize the efficient coupling utilization of non-fossil energy and fossil energy,which has great practical significance to realize the goal of“Dual Carbon”.Due to the high volatile composition and oxygen-enriched characteristics of carbonaceous fuels such as biomass,the volatile-semi-coke interaction inevitably occurs in the thermochemical conversion process and affects the properties of raw materials and equipment process parameters.This article reviews the research progress of volatile-char interaction between biomass and coal during the(co-)pyrolysis/gasification process,and three specific contents of the volatile-char interaction on catalytic cracking of volatiles,the effect on char chemical structure and properties,and research approach of decoupling of synergetic thermochemical transformation are summarized.In view of the current research methods and thought used in the mechanism analysis of volatile-char interaction,some new insights were proposed and the future research directions of the interaction were prospected,so as to provide theoretical guidance for further understanding the physicochemical nature of the interaction.