Yuzuncu Yil University, Vocational School of Health Services, 65080 Van, Turkey.
Yuzuncu Yil University, Educational Faculty, 65080 Van, Turkey.
Bioresour Technol. 2014 Aug;166:309-17. doi: 10.1016/j.biortech.2014.05.051. Epub 2014 May 23.
Milled Onopordum heteracanthum stalks were converted to liquid products in organic solvents (methanol, ethanol and acetone) with (KOH and ZnCl₂) and without catalyst in an autoclave at temperatures of 523, 543 and 563 K. Effects of liquefaction parameters such as catalyst and solvent were investigated. The percentage yields from supercritical methanol, ethanol and acetone conversions were 48.2, 50.4 and 66.2 at 563 K in the non-catalytic runs, respectively. In the catalytic run with ZnCl₂, the highest conversion (70.2%) was obtained in acetone at the same temperature. The obtained liquid products at 563 K were analyzed and characterized by elemental, Fourier transform infrared spectroscopy, gas chromatography-mass spectrometry. 106 different compounds have been identified by GC-MS in the liquid products obtained in methanol at 563 K.
米莱草梗在有机溶剂（甲醇、乙醇和丙酮）中与（KOH 和 ZnCl₂）在高压釜中于 523、543 和 563 K 的温度下转化为液体产物，在有无催化剂的情况下进行。考察了液化参数如催化剂和溶剂的影响。在非催化条件下，在 563 K 时，超临界甲醇、乙醇和丙酮的转化率分别为 48.2%、50.4%和 66.2%。在 ZnCl₂催化下，在相同温度下，在丙酮中得到的转化率最高（70.2%）。在 563 K 下获得的液体产物通过元素分析、傅里叶变换红外光谱和气相色谱-质谱进行了分析和表征。在 563 K 时甲醇中得到的液体产物通过 GC-MS 鉴定出 106 种不同的化合物。
