首页> 外文期刊>Applied Catalysis, A. General: An International Journal Devoted to Catalytic Science and Its Applications >Hydroconversion of xylose derived ketals: A key strategy for producing A broad range of green-hydrocarbons suitable as fuels and petrochemicals
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Hydroconversion of xylose derived ketals: A key strategy for producing A broad range of green-hydrocarbons suitable as fuels and petrochemicals

机译:木糖衍生的缩酮的水电转化:一种用于生产诸如燃料和石化的广泛绿色碳氢化合物的关键策略

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摘要

Recently, sugarcane bagasse was transformed by ketalization reaction into a biocrude with physical-chemical properties adequate for further conversion in typical refining processes. Herein, a representative compound of this biocrude, 1,2:3,5-di-O-isopropylidene-alpha-D-xylofuranose, DX, in n-hexane was hydro processed in the presence of several palladium-catalysts. Screening in a flow reactor andamong Pd supported on SiO2, gamma-Al2O3, HUSY, HY, HBEA and HZSM-5, Pd/HZSM-5 showed the least susceptibility to coke deposition and good deoxygenation capacity, yielding significant amounts of hydrocarbons containing seven or more carbons. Additionally, in a batch and milder conditions, this catalyst was highly selective towards hydrocarbons with high carbon yield and remarkably low coke, i.e., 86 % and <5 % of carbon from DX, respectively. Water was the major product of deoxygenation. The hydrocarbon products included branched and linear alkanes, cycloalkanes and aromatics, whose distribution was sensitive to the catalyst properties, such as support's mesoporosity.
机译:最近,甘蔗渣通过缩酮化反应转化为生物原油,其物理化学性质足以在典型的精炼过程中进一步转化。在此,该生物原油的代表性化合物1,2:3,5-二-O-异亚丙基-α-D-木呋喃糖DX在正己烷中在几种钯催化剂存在下进行了加氢处理。在流动反应器中进行筛选,在SiO2、γ-Al2O3、HUSY、HY、HBEA和HZSM-5支撑下,Pd/HZSM-5对积炭的敏感性最低,除氧能力良好,产生大量含有七种或更多碳的碳氢化合物。此外,在分批和较温和的条件下,该催化剂对高碳产率和极低焦炭的碳氢化合物具有高度选择性,即DX中的碳含量分别为86%和<5%。水是脱氧的主要产物。烃产物包括支链烷烃和直链烷烃、环烷烃和芳烃,其分布对催化剂性质(如载体的中孔度)敏感。

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