盐酸洗涤对甜高粱渣微观结构和热解生物油成分的影响。
Effects of hydrochloric acid washing on the microstructure and pyrolysis bio-oil components of sweet sorghum bagasse.
机构信息
College of Engineering, Shenyang Agricultural University, Shenyang 110866, Liaoning, China.
College of Agricultural and Life Science, Texas A & M University, College Station 77840, TX, USA.
出版信息
Bioresour Technol. 2019 Apr;277:37-45. doi: 10.1016/j.biortech.2019.01.023. Epub 2019 Jan 8.
Acid washing is an alternative and promising approach for biomass to produce high-quality bio-oil. The hydrochloric acid washing pretreatment of sweet sorghum bagasse was performed in this study. The effects of acid washing on the ultrastructure of sweet sorghum bagasse were investigated using scanning electron microscope and Fourier transform infrared, and the effects on pyrolysis using thermogravimetric analyzer and a fast pyrolysis device. The results indicated acid treatment obviously changed the surface morphology of the cell walls of sweet sorghum bagasse, effectively removed most metals from sweet sorghum bagasse, and increased the volatiles and bio-oil yields. The results showed that bio-oil produced from pretreated sweet sorghum bagasse contained less components categories, lower contents of phenols, aldehydes, furans and alcohols, while much higher contents of d-allose and ketones than that from the original sample. Hydrochloric acid-washing pretreatment of sweet sorghum bagasse can increase the contents of some high-value chemicals in bio-oil.
酸处理是一种替代且有前景的生物质制高品质生物油的方法。本研究采用盐酸对甜高粱蔗渣进行了洗涤预处理。利用扫描电子显微镜和傅里叶变换红外光谱研究了酸处理对甜高粱蔗渣超微结构的影响，并利用热重分析仪和快速热解装置研究了酸处理对热解的影响。结果表明，酸处理明显改变了甜高粱蔗渣细胞壁的表面形态，有效地去除了甜高粱蔗渣中的大部分金属，提高了挥发分和生物油产率。结果表明，预处理后的甜高粱蔗渣所产生物油的成分种类较少，酚类、醛类、呋喃类和醇类的含量较低，而 D-阿洛糖和酮类的含量则远高于原样品。盐酸洗涤预处理甜高粱蔗渣可以增加生物油中一些高价值化学品的含量。
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