Torrefaction of corn straw in oxygen and carbon dioxide containing gases: Mass/energy yields and evolution of gaseous species

FUEL

卷:285

Article

Liu, Yu¹  Rokni, Emad²  Yang, Ruilei³  Ren, Xiaohan¹  Sun, Rui⁴  Levendis, Yiannis A.² 

[1] Shandong Univ, Inst Thermal Sci & Technol, Jinan 250061, Peoples R China

[2] Northeastern Univ, Mech & Ind Engn Dept, Boston, MA 02115 USA

[3] Tianjin Univ, Sch Environm Sci & Engn, Tianjin 300072, Peoples R China

[4] Harbin Inst Technol, Sch Energy Sci & Engn, Harbin 150001, Peoples R China

关键词: Biomass;    Oxidative torrefaction;    Mass and energy yields;    Emissions;    Sulfur;    Nitrogen and chlorine release;   

DOI  :  10.1016/j.fuel.2020.119044

来源: Elsevier

【 摘 要 】

Pulverized corn straw biomass was torrefied in carrier gases which contain oxygen and carbon dioxide gases with the following proportions (3-7% O-2, 13-17% CO2, 80% N-2). Torrefaction took place at 275-375 degrees C, under atmospheric conditions. Upon such oxidative torrefaction, the mass and energy yields of this biomass decreased with increasing temperature and increasing oxygen concentration. Most of the chlorine and sulfur contents of the biomass were released to the gas phase, 52-90% and 55-98% respectively, with amounts increasing with increasing both torrefaction temperature and oxygen concentration. In the examined parameter ranges, temperature had a pronounced effect on the mass and energy yields and on the evolution of chlorine and other elements to the gas phase. Low temperatures decrease the energy input to the process and enhance the mass and energy yields of the solid product. At the examined temperatures, the mass and energy yields were also affected by the variation in the oxygen content of the input gas.

【 授权许可】

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