Evolution characteristics and mechanism of products from large-particle biomass pyrolysis in molten salt media

被引:2
作者
She, Hui [1 ]
Lv, Peng [1 ]
Song, Xudong [1 ]
Bai, Yonghui [1 ]
Wang, Jiaofei [1 ]
Su, Weiguang [1 ]
Wei, Juntao [2 ]
Bao, Weina [3 ]
Yu, Guangsuo [1 ,4 ]
机构
[1] Ningxia Univ, State Key Lab High Efficiency Utilizat Coal & Gree, Yinchuan 750021, Peoples R China
[2] Nanjing Forestry Univ, Coll Mat Sci & Engn, Coinnovat Ctr Efficient Proc & Utilizat Forest Res, Joint Int Res Lab Biomass Energy & Mat, Nanjing 210037, Peoples R China
[3] Shandong Yankuangguotuo Sci & Engn Co Ltd, Zoucheng 273500, Peoples R China
[4] East China Univ Sci & Technol, Inst Clean Coal Technol, Shanghai 200237, Peoples R China
基金
中国国家自然科学基金;
关键词
Large-particle biomass; Molten salts; Pyrolysis; Conversion mechanism; SOLAR PYROLYSIS; BIO-OIL; TEMPERATURE; CARBON; GASIFICATION; REACTIVITY; CO2;
D O I
10.1016/j.indcrop.2024.119963
中图分类号
S2 [农业工程];
学科分类号
0828 ;
摘要
Molten salt pyrolysis of biomass is a promising approach for producing clean and renewable energy by combining solar-driven molten salt heat storage with thermochemical conversion of biomass. Pyrolysis of large-particle biomass offers many advantages in practical applications. However, during pyrolysis, heat and mass transfer behavior inside the particles cannot be ignored. This study investigated the product composition and product distribution characteristics during the pyrolysis process of large-particle biomass in molten salt. The influence of molten salt on the physical and chemical structure of biochar from the core to the outer layer was analyzed layerby-layer by micro computed tomography and temperature programmed oxidation techniques. The evolution mechanism of products during the molten salt pyrolysis of large-particle biomass was also analyzed. The results indicate that the excellent heat transfer efficiency of molten salt promoted the pyrolysis of large biomass particles and increased the aromatic condensation degree of biochar. Compared with traditional pyrolysis, molten salt pyrolysis afforded higher yields of biochar and pyrolysis gas, as well as lower yields of bio-oil. In particular, the catalytic reforming effect of molten salt on volatile matter further reduced the yield of bio-oil and increased the yield of combustible gases such as H2 and CO. Moreover, the etching effect of the molten salt on the biochar resulted in a more porous structure, and led to a 24 % increase in the total pore count across various regions of the biomass particles during molten salt-assisted pyrolysis. There was a 70 % reduction in pores with a volume exceeding 10 mm3, and a 46 % increase in pores with a volume of less than 2.2 mm3. This study can promote the development of pyrolysis technology and help to promote biomass energy utilization technology.
引用
收藏
页数:11
相关论文
共 41 条
  • [1] Relating reactivity to structure in cokes and carbon materials: Temperature-programmed oxidation and microscopy techniques
    Andreoli, Sara
    Eser, Semih
    [J]. CARBON, 2020, 168 (168) : 362 - 371
  • [2] Applying the solar solid particles as heat carrier to enhance the solar-driven biomass gasification with dynamic operation power generation performance analysis
    Bai, Zhang
    Gu, Yucheng
    Wang, Shuoshuo
    Jiang, Tieliu
    Kong, Debin
    Li, Qi
    [J]. APPLIED ENERGY, 2023, 351
  • [3] Process improvement analysis of pyrolysis/gasification of biomass and waste plastics with carbon capture and utilisation through process simulation
    Chai, Yue
    Packham, Nicholas
    Wang, Meihong
    [J]. FUEL, 2022, 324
  • [4] A review on recycling techniques for bioethanol production from lignocellulosic biomass
    Chen, Jiaxin
    Zhang, Biying
    Luo, Lingli
    Zhang, Fan
    Yi, Yanglei
    Shan, Yuanyuan
    Liu, Bianfang
    Zhou, Yuan
    Wang, Xin
    Lu, Xin
    [J]. RENEWABLE & SUSTAINABLE ENERGY REVIEWS, 2021, 149
  • [5] Production, upgradation and utilization of solar assisted pyrolysis fuels from biomass - A technical review
    Chintala, Venkateswarlu
    [J]. RENEWABLE & SUSTAINABLE ENERGY REVIEWS, 2018, 90 : 120 - 130
  • [6] Assessment of performance, combustion and emission characteristics of a direct injection diesel engine with solar driven Jatropha biomass pyrolysed oil
    Chintala, Venkateswarlu
    Kumar, Suresh
    Pandey, Jitendra K.
    [J]. ENERGY CONVERSION AND MANAGEMENT, 2017, 148 : 611 - 622
  • [7] Adsorptive carbons from pinewood activated with a eutectic mixture of molten chloride salts: Influence of temperature and salt to biomass ratio
    De Smedt, Jonas
    Arauzo, Pablo J.
    Maziarka, Przemyslaw
    Ronsse, Frederik
    [J]. JOURNAL OF CLEANER PRODUCTION, 2022, 376
  • [8] Pyrolysis of LignoBoost lignin in ZnCl2-KCl-NaCl molten salt media: Insights into process-pyrolysis oil yield and composition relations
    Genuino, Homer C.
    Contucci, Ludovico
    Velasco, Jessi Osorio
    Sridharan, Balaji
    Wilbers, Erwin
    Akin, Okan
    Winkelman, Josef G. M.
    Venderbosch, Robertus H.
    Heeres, Hero J.
    [J]. JOURNAL OF ANALYTICAL AND APPLIED PYROLYSIS, 2023, 172
  • [9] The effects of temperature and molten salt on solar pyrolysis of lignite
    He, Xiao
    Zeng, Kuo
    Xie, Yingpu
    Flamant, Gilles
    Yang, Haiping
    Yang, Xinyi
    Nzihou, Ange
    Zheng, Anqing
    Ding, Zhi
    Chen, Hanping
    [J]. ENERGY, 2019, 181 : 407 - 416
  • [10] In-situ catalytic pyrolysis of biomass with nickel salts: Effect of nickel salt type
    Hu, Jian
    He, Yanying
    Zhang, Jilong
    Chen, Long
    Zhou, Yu
    Zhang, Jing
    Tao, Honglin
    Zhou, Nan
    Mi, Baobin
    Wu, Fangfang
    [J]. JOURNAL OF ANALYTICAL AND APPLIED PYROLYSIS, 2023, 172