Abstract Furanic bio-oils were produced from liquefaction of corn cobs and switchgrass using 1-(3-propylsulfonic)-3-methylimidazolium chloride catalyst in acetone at 120 °C, 5 h. The biomass conversions to bio-oils for corn cobs and switchgrass were 43.8 ± 1.9 and 40.2 ± 1.4% (w/w) respectively. The bio-oils were then catalytically hydrogenated in water: methanol 3:1 (v/v) at room-temperature and atmospheric pressure using 5% Pd-C catalyst to give hydrogenated bio-oils and analyzed using GC–MS to identify the products. GC–MS analysis revealed that majority of the products in hydrogenated bio-oils is C4-C17 alcohols, ethers and furans. A total of 64 products were observed in GC–MS and 61 were identified with the use of mass spectroscopy. These products are arising from the partial reduction as well as deoxygenation of biomass derived furan aldehyde - acetone cross aldol products and acetone self condensation products. In addition, NMR analysis was used to quantify the effect of catalytic hydrogenation. 1H NMR spectra peak integration for the alkene-furan region (6.0–8.0 ppm) showed reductions of 19.0 to 1.8% and 19.1 to 2.6% due to the catalytic hydrogenation of bio-oils from corn cobs and switchgrass, confirming the effect of Pd-C catalyzed, 1 Atm., room temperature hydrogenation.

中文翻译：

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Pd/C 催化室温常压氢化来自酸性离子液体的呋喃生物油催化生物质在丙酮中液化

摘要 使用 1-(3-丙基磺酸)-3-甲基咪唑氯化鎓催化剂在丙酮中于 120 °C、5 小时液化玉米芯和柳枝稷制备呋喃生物油。玉米芯和柳枝稷向生物油的生物质转化率分别为 43.8 ± 1.9 和 40.2 ± 1.4% (w/w)。然后将生物油在水：甲醇 3:1 (v/v) 中在室温和大气压下使用 5% Pd-C 催化剂催化氢化得到氢化生物油，并使用 GC-MS 进行分析以鉴定产物. GC-MS 分析表明，氢化生物油中的大部分产品是 C4-C17 醇、醚和呋喃。GC-MS 共观察到 64 种产物，质谱法鉴定了 61 种产物。这些产物来自生物质衍生的呋喃醛-丙酮交叉羟醛产物和丙酮自缩合产物的部分还原和脱氧。此外，使用NMR分析来量化催化氢化的效果。由于来自玉米芯和柳枝稷的生物油的催化氢化，烯烃-呋喃区域（6.0-8.0 ppm）的 1H NMR 光谱峰积分显示减少了 19.0% 至 1.8% 和 19.1% 至 2.6%，证实了 Pd- C催化，1大气压，室温氢化。