基于微波湿烘焙畜粪生物质提质研究.

Horse manure was pretreated by microwave wet torrefaction, and the effects of reaction solvent and torrefaction temperature on composition, thermal degradation characteristics, higher heating value, energy yield and morphology of horse manure were investigated. The results showed that the fixed carbon content and higher heating value of horse manure increased with the increase of temperature, while the energy yield decreased with the increase of temperature. Compared with the raw horse manure, the fixed carbon content increased significantly, the O/C ratio decreased by 28.00%, the higher heating value increased by 21.07%, and the energy yield obtained was 74.30% for torrefied horse manure obtained in pure water solvent at 200 ℃. Compared with the raw materials, the torrefied horse manure obtained in pure water and succinic acid has more ash content, while the sulfuric acid solvent can reduce the content of metal elements that form ash by 50.00%. Microwave wet torrefaction reduced the pyrolysis reactivity of horse manure but led to the improvement in combustion reactivity. The pore structure of the torrefied horse manure obtained in pure water solvent was more evident. The present work shows that microwave wet torrefaction can improve the quality of horse manure, in which the water is shown to be a more suitable reaction solvent than dilute acid at torrefied temperature of 200 ℃. [ABSTRACT FROM AUTHOR]