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Thermal and catalytic micropyrolysis for conversion of cottonseed oil dregs to produce biokerosene
Journal of Analytical and Applied Pyrolysis ( IF 5.8 ) Pub Date : 2018-01-01 , DOI: 10.1016/j.jaap.2017.12.010
Tarciane Greyci dos Santos Souza , Brenda Lohanny Passos Santos , Ayrla Murielly Alves Santos , Anne Michelle Garrido Pedrosa de Souza , James Correia de Melo , Alberto Wisniewski

Abstract A sample of cottonseed oil dregs was obtained by the alkali pretreatment of the oil to remove free fatty acids and other impurities before an industrial biodiesel production process. The alkali dregs was characterized and submitted to non-catalytic, catalytic, and reactive hydrogen atmosphere micropyrolysis experiments to assess the capacities for type SPK–HEFA biokerosene production. Non-catalytic and catalytic micropyrolyses were performed at 500 and 550 °C. In the catalytic experiments, catalysts based on Mo or W oxides supported on Zr or Ti oxides were tested for the first time for this purpose. The moisture content of the cottonseed oil dregs was 23.4% (wt%) and the other major components were triacylglycerols + free fatty acids (65.0%) and inorganic material (9.8%). The products of the micropyrolysis experiments were characterized by GC–MS and quantified by GC-FID. The presence of moisture in the initial feedstock provided better results in the thermal conversion to liquid biofuel (16%), compared to dry biomass (6%), considering the n-alkanes and n-alkenes produced in the range C9–C16. The mass conversion performed in the presence of catalysts at 550 °C resulted in an average yield of around 32%, compared to a value of 19% for a non-catalytic process under a nitrogen atmosphere, with the same values for the yields under a reactive hydrogen atmosphere. The reactive atmosphere and the catalysts did not have any substantial influence on the ratio between n-alkanes and n-alkenes.

中文翻译:

热和催化微热解将棉籽油渣转化为生物煤油

摘要 在工业生物柴油生产过程中,对棉籽油渣进行碱预处理,去除游离脂肪酸等杂质,得到棉籽油渣样品。对碱渣进行表征并提交给非催化、催化和反应性氢气氛微热解实验,以评估 SPK-HEFA 型生物煤油生产的能力。非催化和催化微热解在 500 和 550 °C 下进行。在催化实验中,为此目的首次测试了基于负载在 Zr 或 Ti 氧化物上的 Mo 或 W 氧化物的催化剂。棉籽油渣含水率为23.4%(wt%),其他主要成分为甘油三酯+游离脂肪酸(65.0%)和无机物(9.8%)。微热解实验的产物通过 GC-MS 进行表征,并通过 GC-FID 进行定量。考虑到 C9-C16 范围内产生的正烷烃和正烯烃,与干生物质 (6%) 相比,初始原料中水分的存在在向液体生物燃料的热转化中提供了更好的结果 (16%)。在 550 °C 催化剂存在下进行的质量转化产生约 32% 的平均产率,而氮气氛下非催化过程的产率为 19%,在反应性氢气氛。反应气氛和催化剂对正烷烃和正烯烃之间的比例没有任何实质性影响。考虑到 C9-C16 范围内产生的正烷烃和正烯烃,与干生物质 (6%) 相比,初始原料中水分的存在在向液体生物燃料的热转化中提供了更好的结果 (16%)。在 550 °C 催化剂存在下进行的质量转化产生约 32% 的平均产率,而氮气氛下非催化过程的产率为 19%,在反应性氢气氛。反应气氛和催化剂对正烷烃和正烯烃之间的比例没有任何实质性影响。考虑到 C9-C16 范围内产生的正烷烃和正烯烃,与干生物质 (6%) 相比,初始原料中水分的存在在向液体生物燃料的热转化中提供了更好的结果 (16%)。在 550 °C 催化剂存在下进行的质量转化产生约 32% 的平均产率,而氮气氛下非催化过程的产率为 19%,在反应性氢气氛。反应气氛和催化剂对正烷烃和正烯烃之间的比例没有任何实质性影响。与氮气氛下非催化过程的 19% 值相比,活性氢气氛下的产率值相同。反应气氛和催化剂对正烷烃和正烯烃之间的比例没有任何实质性影响。与氮气氛下非催化过程的 19% 值相比,活性氢气氛下的产率值相同。反应气氛和催化剂对正烷烃和正烯烃之间的比例没有任何实质性影响。
更新日期:2018-01-01
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