College of Environmental Science and Engineering, Nankai University, Tianjin 300071, PR China.
Bioresour Technol. 2010 May;101(9):3236-41. doi: 10.1016/j.biortech.2009.12.082. Epub 2010 Jan 13.
Pyrolysis of herb residue was investigated in a fixed-bed to determine the effects of pyrolysis temperature and catalysts (ZSM-5, Al-SBA-15 and alumina) on the products yields and the qualities of bio-oils. The results indicated that the maximum bio-oil yield of 34.26% was obtained at 450 degrees Celsius with 10 wt.% alumina catalyst loaded. The pyrolytic oils were examined by ultimate analysis and calorific values determination, and the results indicated that the presence of all catalysts decreased the oxygen content of bio-oils and increased the calorific values. The order of the catalytic effect for upgrading the pyrolytic oil was Al(2)O(3)>Al-SBA-15>ZSM-5. The bio-oil with the lowest oxygen content (26.71%) and the highest calorific value (25.94 MJ kg(-1)) was obtained with 20 wt.% alumina catalyst loaded. Furthermore, the gas chromatography/mass spectrometry (GC/MS) was used in order to investigate the components of obtained pyrolytic oils. It was found that the alumina catalyst could clearly enhance the formation of aliphatics and aromatics.
采用固定床热解技术研究了草本废弃物的热解特性，考察了热解温度和催化剂（ZSM-5、Al-SBA-15 和氧化铝）对产物收率和生物油品质的影响。结果表明，在 450℃、10wt.%氧化铝负载量条件下生物油收率最大，为 34.26%。通过元素分析和热值测定对热解油进行了考察，结果表明，所有催化剂的存在都降低了生物油的含氧量，提高了热值。催化剂对热解油的升级效果顺序为 Al2O3>Al-SBA-15>ZSM-5。在 20wt.%氧化铝负载量条件下，生物油的含氧量最低（26.71%），热值最高（25.94MJkg-1）。此外，还采用气相色谱/质谱（GC/MS）联用技术对所得热解油的成分进行了分析。结果表明，氧化铝催化剂可以明显促进脂肪族和芳香族化合物的生成。
