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

doi:10.11949/0438-1157.20220827

CIESC Journal ›› 2022, Vol. 73 ›› Issue (11): 5186-5200.DOI: 10.11949/0438-1157.20220827

• Special column for Thermalchemical conversion of biomass and organic solid wastes • Previous Articles Next Articles

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

Meng MA¹(), Yonghui BAI¹(), Juntao WEI², Lunjing YAN³, Peng LYU¹, Jiaofei WANG¹, Xudong SONG¹, Weiguang SU¹, Guangsuo YU¹^,⁴()

^1.State Key Laboratory of High-efficiency Utilization of Coal and Green Chemical Engineering, School of Chemistry and Chemical Engineering, Ningxia University, Yinchuan 750021, Ningxia, China
^2.College of Materials Science and Engineering, Nanjing Forestry University, Nanjing 210037, Jiangsu, China
^3.State Key Laboratory of Clean and Efficient Coal Utilization, Taiyuan University of Technology, Taiyuan 030024, Shanxi, China
^4.Institute of Clean Coal Technology, East China University of Science and Technology, Shanghai 200237, China

Received:2022-06-14 Revised:2022-08-29 Online:2022-12-06 Published:2022-11-05
Contact: Yonghui BAI, Guangsuo YU

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

马萌¹(), 白永辉¹(), 卫俊涛², 闫伦靖³, 吕鹏¹, 王焦飞¹, 宋旭东¹, 苏暐光¹, 于广锁¹^,⁴()

^1.宁夏大学省部共建煤炭高效利用与绿色化工国家重点实验室，化学化工学院，宁夏银川 750021
^2.南京林业大学材料科学与工程学院，江苏南京 210037
^3.太原理工大学省部共建煤基能源清洁高效利用国家重点实验室，山西太原 030024
^4.华东理工大学洁净煤技术研究所，上海 200237

通讯作者: 白永辉,于广锁
作者简介:马萌（1994—），男，博士研究生，mameng1021@163.com
基金资助:
宁夏回族自治区优秀青年科学基金项目(2022AAC05016);国家自然科学基金项目(21968024);宁夏回族自治区重点研发计划项目(2019BEB04001)

Abstract

Abstract:

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.

Key words: biomass, coal, co-pyrolysis, co-gasification, volatile-char interaction

摘要：

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。

关键词: 生物质, 煤, 共热解, 共气化, 挥发分-半焦交互作用

CLC Number:

TQ 530.2

Meng MA, Yonghui BAI, Juntao WEI, Lunjing YAN, Peng LYU, Jiaofei WANG, Xudong SONG, Weiguang SU, Guangsuo YU. Research and progress of volatile-char interaction during biomass and coal (co-)pyrolysis/gasification process[J]. CIESC Journal, 2022, 73(11): 5186-5200.

马萌, 白永辉, 卫俊涛, 闫伦靖, 吕鹏, 王焦飞, 宋旭东, 苏暐光, 于广锁. 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[J]. 化工学报, 2022, 73(11): 5186-5200.

Figures/Tables 13

Fig.1 The basic concept of volatile-char interactions on carbonaceous fuels thermochemical conversion processes

Fig.2 The schematic diagram of the arrangement of experimental samples[22]

Fig.3 Effect of different coking temperatures on the distribution and composition of volatile catalytic cracking products over biochar catalyst[23]

Fig.4 Heterogeneous reforming mechanism of biomass tar over biochar in the presence of H2O and CO2 at 800℃[38]

Fig.5 Retention of AAEM species in pyrolysis biochar[49]

Fig.6 IGR/ID and I(GR+VL+VR)/ID values of lignite char under different feeding rates in the volatile-char interactions[59]

Fig.7 Schematic diagram of experimental scheme design[63]

Fig.8 CO2 reactivity of fresh and reacted coal char under catalytic reforming mode [64]

Fig.9 A schematic diagram of char inactivation principle under volatile-char interaction[50]

Fig.10 Volatilisation of Na during the brown coal pyrolysis in a wire-mesh reactor and a fixed-bed/fluidised-bedreactor [46, 50]

Fig.11 Schematic diagram of volatile-char interaction regulating reactor[76]

Fig.12 Release diagrams of primary and secondary volatiles from cedar sawdust pyrolysis[81]

Fig.13 Schematic diagram of thermal crucible structure [83]

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

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

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