Influence of additives on lignin agglomeration and pyrolysis behavior

FUEL

卷:263

Article

Li, Jian¹  Bai, Xiaowei¹  Dong, Zhiguo¹  Chen, Yingquan¹  Yang, Haiping¹  Wang, Xianhua¹  Chen, Hanping¹ 

[1] Huazhong Univ Sci & Technol, State Key Lab Coal Combust, 1037 Luoyu Rd, Wuhan 430074, Hubei, Peoples R China

关键词: Lignin;    Pyrolysis;    Ca/Mg additive;    Bio-char;    Agglomeration;   

DOI  :  10.1016/j.fuel.2019.116629

来源: Elsevier

【 摘 要 】

During biomass pyrolysis, lignin agglomeration causes serious problems for lignin thermochemical conversion, including feeding clogging, reactor blocking, etc. To inhibit the agglomeration, the influence of 11 variant mineral additives (strong base, medium base and amphoteric compound) was investigated during lignin pyrolysis process. It was found that Mg(OH)(2) and Ca(OH)(2) adding are very effective, and they could inhibit the agglomeration of lignin particles and formed powdered char instead of hard-shelled char of raw lignin pyrolysis. Furthermore, the influence of Mg(OH)(2) and Ca(OH)(2) additives on pyrolytic products were investigated. It was found that they all promoted the formation of CO2, but Mg(OH)(2) additive is strongly favorable for catechol phenols evolving, while Ca(OH)(2) showed positive influence on the formation of OH functional group in solid biochar, but reduced the formation of guaiacol phenol in liquid oil. It is great for the utilization of lignin and biomass.

【 授权许可】

Free