Graduate School of Science and Technology, Hirosaki University, 1-Bunkyocho, Hirosaki 036-8560, Japan.
Graduate School of Science and Technology, Hirosaki University, 1-Bunkyocho, Hirosaki 036-8560, Japan; North Japan Research Institute for Sustainable Energy (NJRISE), Hirosaki University, 2-1-3, Matsubara, Aomori 030-0813, Japan.
Bioresour Technol. 2015 Mar;179:518-523. doi: 10.1016/j.biortech.2014.12.046. Epub 2014 Dec 23.
Four high silica zeolites, i.e., HSZ-385, 890, 960, and 990 were utilized for the selective catalytic conversion of bio-oil from Fallopia japonica to certain chemicals in a fixed-bed reactor. The Beta-type HSZ-960 zeolite showed the highest selectivity to hydrocarbons, especially to aromatics as well as PAH compounds with the lowest unwanted chemicals while HSZ-890 showed high selectivity to aromatics. NH3-Temperature Programmed Desorption (TPD) analysis indicated that different amounts of acid sites in different zeolites determined the catalytic activity for the oxygen removal from bio-oil, in which the acid sites at low temperature (LT) region gave more contribution within the utilized temperature region. The reusability test of HSZ-960 showed the stability of hydrocarbons yield at higher temperature due to the significant contribution of coke gasification which assisted further deoxygenation of bio-oil. These results provide a guidance to select suitable zeolite catalysts for the upgrading of bio-oil in a practical process.
四种高硅沸石，即 HSZ-385、890、960 和 990，被用于在固定床反应器中将来自落新妇的生物油选择性催化转化为某些化学品。Beta 型 HSZ-960 沸石对烃类，特别是芳烃以及具有最低无用化学品的多环芳烃化合物具有最高的选择性，而 HSZ-890 则对芳烃具有高选择性。NH3-程序升温脱附（TPD）分析表明，不同沸石中不同数量的酸位决定了从生物油中去除氧的催化活性，其中低温（LT）区域的酸位在使用的温度区域内贡献更大。HSZ-960 的重复使用测试表明，由于焦炭气化的显著贡献，在较高温度下烃类产率的稳定性更高，这有助于进一步对生物油进行脱氧。这些结果为在实际过程中选择合适的沸石催化剂来升级生物油提供了指导。
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