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| 柠檬酸改性Pt/Al-MCM-41催化麻疯树籽油 一步加氢制备燃油组分 |
| Preparation of fuel components by one-step hydrogenation of Jatropha curcas L. seed oil catalyzed by citric acid modified Pt/Al-MCM-41 |
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| DOI： |
| 中文关键词: 分子筛 柠檬酸改性 催化加氢 燃油组分 生物油 |
| 英文关键词:molecular sieve citric acid etching catalytic hydrogenation fuel component bio-oil |
| 基金项目:云南省基础研究计划重点项目（2019FA004）；国家自然科学基金项目（21266032）；云南省烟草化学重点实验室项目（2019539200340163）；云南省国际科技合作专项（202003AF140001）；国家国际科技合作专项（2015DFA60120） |
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| 中文摘要: |
| 采用0.25 mol/L柠檬酸浸渍处理Al-MCM-41后负载Pt制备成新型催化剂，并采用XRD、TEM、XRF、NH3-TPD和Py-IR对改性催化剂进行表征。以麻疯树籽油为原料，在微型高压固定床催化剂反应评价装置上，以空速1.0 h-1、氢油比1 000、氢压4 MPa、柠檬酸改性催化剂Pt/Al-MCM-41用量6 mL以及不同温度进行一步加氢催化制备燃油组分，通过GC-MS对产物进行定性定量分析。结果表明：柠檬酸降低了Al-MCM-41分子筛骨架的有序度，部分Al被脱除，催化剂比表面积降低、但提高了催化剂孔容、孔径，形成了微孔，其酸性也有了显著改变；当加氢反应温度为360 ℃时，产物的脱氧率为87.11%，C9~C14烷烃相对含量为5.59%，C15~C16烷烃相对含量为34.55%，C8~C16异构烷烃相对含量为14.12%，C8~C16芳烃相对含量为3.12%，C17~C18烷烃相对含量为60.48%。柠檬酸改性催化剂Pt/Al-MCM-41对催化麻疯树籽油加氢反应的短链烷烃选择性较低。 |
| 英文摘要: |
| Modified Pt/Al-MCM-41 was prepared by loading Pt after 0.25 mol/L citric acid impregnation. The modified catalyst was characterized by XRD, TEM, XRF, NH3-TPD and Py-IR. Using Jatropha curcas L. seed oil as raw material, the biofuels was prepared by one-step hydrogenation in a high pressure fixed bed under the conditions of airspeed 1.0 h-1, hydrogen-oil ratio 1 000, pressure of hydrogen 4 MPa, dosage of citric acid modified Pt/Al-MCM-41 catalyst 6 mL and different temperatures, and the product was analyzed by GC-MS. The results showed that citric acid reduced the order degree of molecular sieve framework, part of Al was removed, and the specific surface area decreased, but the pore volume and pore size of the catalyst increased, micropores was formed, and the acidity also significantly changed. When the hydrogenation temperature was 360 ℃, the deoxygenation rate was 87.11%, the relative contents of C9-C14 alkanes, C15-C16 alkanes, C8-C16 isomeric alkanes, C8-C16 aromatics and C17-C18 alkanes were 559%, 34.55%, 14.12%, 3.12% and 60.48%， respectively. The citric acid modified Pt/Al-MCM-41 had low selectivity to the short-chain alkanes in catalyzing the hydrogenation reation of Jatropha curcas L. seed oil. |
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