Influence of calcination temperature on calcined carbide slag assisted biomass pyrolysis

被引：16

作者：

Chen, Xu ^{[1
,2
]}

Li, Shujuan ^{[2
]}

Chen, Wei ^{[3
]}

Chen, Yingquan ^{[2
]}

Chen, Hanping ^{[2
]}

Yang, Haiping ^{[2
]}

机构：

[1] Wuhan Polytech Univ, Sch Modern Ind Selenium Sci & Engn, Wuhan 430023, Peoples R China

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

[3] Nanjing Agr Univ, Coll Engn, Nanjing 210014, Peoples R China

来源：

FUEL PROCESSING TECHNOLOGY | 2022年 / 234卷

基金：

中国国家自然科学基金;

关键词：

Biomass pyrolysis; CaO; Carbide slag; Calcination temperature; BIO-OIL; CAO; PRODUCTS; YIELDS; GAS;

D O I：

10.1016/j.fuproc.2022.107339

中图分类号：

O69 [应用化学];

学科分类号：

081704 ;

摘要：

Biomass pyrolysis over CaO produced from the calcination of precursors is a prospective method for upgrading pyrolysis products while also lowering CO2 emissions. However, the structure-activity relationship of CaO in biomass pyrolysis process is rarely reported. In this study, cotton stalk pyrolysis over CaO produced from carbide slag was conducted, and the effect of calcination temperature (650-950 degrees C) on the structure of CaO and its performance in biomass pyrolysis process was thoroughly explored. Results showed that decreasing the calcination temperature would inhibit the sintering of CaO crystals, and thus CaO obtained at low calcination temperature (650 degrees C) showed small crystal size (43 nm) and strong basicity, resulting in a high CO2 fixation (0.146 g/g CaO) and LHV of pyrolysis gas (18.95 MJ/m(3)). Meanwhile, with the calcination temperature increasing from 650 degrees C to 950 degrees C, the content of acids in bio-oil increased significantly from 17.89% to 32.30%, and that of hydrocarbons in bio-oil decreased noticeably from 11.47% to 5.21%, indicating the decrease of bio-oil quality. Overall, the calcination temperature of 650 degrees C is more favorable for CO2 fixation and pyrolysis products upgrading.

引用

页数：6

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