Sarada Sripada, Seyedehsan Vasefi and James R. Kastner*,
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Among the ACM-supported hydrotalcites, the HT/ACM activated by air plasma at 100 W for 1 min (PHT/ACM-100W) displayed a higher 2-CP space time yield of 641 g L-cat<sup>–1</sup> h<sup>–1</sup> and selectivity of 27% (220 °C, 1 atm, 0.73 min vapor phase contact time). PHT/ACM-100W displayed a higher CP conversion (42%) compared to the unsupported calcined (34%, 500 °C for 4 h) and rehydrated (39.5%, 8 h at 105 °C) hydrotalcite catalysts yet significantly lower space time yields, suggesting low hydrotalcite distribution and loading on the carbon monolith. The plasma-activated carbon monolith-supported hydrotalcite catalysts synthesized in this work are promising alternatives to the thermally activated and rehydrated hydrotalcites for the catalytic upgrading of biobased cyclic and linear ketones.</p>","PeriodicalId":39,"journal":{"name":"Industrial & Engineering Chemistry Research","volume":null,"pages":null},"PeriodicalIF":3.8000,"publicationDate":"2024-06-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://pubs.acs.org/doi/epdf/10.1021/acs.iecr.4c01687","citationCount":"0","resultStr":"{\"title\":\"Plasma-Activated Solid Base Carbon Monolith Catalyst for Continuous Synthesis of High-Density Aviation Fuel Precursors\",\"authors\":\"Sarada Sripada, Seyedehsan Vasefi and James R. 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Among the ACM-supported hydrotalcites, the HT/ACM activated by air plasma at 100 W for 1 min (PHT/ACM-100W) displayed a higher 2-CP space time yield of 641 g L-cat<sup>–1</sup> h<sup>–1</sup> and selectivity of 27% (220 °C, 1 atm, 0.73 min vapor phase contact time). PHT/ACM-100W displayed a higher CP conversion (42%) compared to the unsupported calcined (34%, 500 °C for 4 h) and rehydrated (39.5%, 8 h at 105 °C) hydrotalcite catalysts yet significantly lower space time yields, suggesting low hydrotalcite distribution and loading on the carbon monolith. 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引用次数: 0
摘要
环戊酮(CP)是一种环状碳氢化合物,是一种潜在的生物基平台化学品,可用于合成高密度喷气燃料范围的环烷烃。在碱催化下,CP 自缩合生成 2-环戊亚基环戊酮(2-CP)和 2,5-二环戊亚基环戊酮(3-CP)。2-CP 可用于燃料、香料和香精,而 3-CP 可用作柴油级产品的前体。本研究采用传统的热煅烧、再水化和空气等离子技术合成了固体基活性炭整体石(ACM)支撑的水滑石催化剂(HT/ACM),并进行了连续环戊酮自缩合的演示。在 ACM 支持的氢滑石中,经 100 瓦空气等离子体活化 1 分钟的 HT/ACM (PHT/ACM-100W)显示出更高的 2-CP 时空产率(641 g L-cat-1 h-1)和 27% 的选择性(220 °C, 1 atm, 0.73 分钟气相接触时间)。PHT/ACM-100W 与未支撑的煅烧(34%,500 °C 4 小时)和再水化(39.5%,105 °C 8 小时)水滑石催化剂相比,显示出更高的氯化石蜡转化率(42%),但空间产率却明显较低,这表明碳整体石上的水滑石分布和负载量较低。本研究中合成的等离子体活化碳整体柱支撑的氢滑石催化剂有望替代热活化和再水合氢滑石,用于生物基环酮和线性酮的催化升级。
Plasma-Activated Solid Base Carbon Monolith Catalyst for Continuous Synthesis of High-Density Aviation Fuel Precursors
Cyclopentanone (CP), a cyclic hydrocarbon, is a potential biobased platform chemical for the synthesis of high-density jet fuel range cycloalkanes. The base-catalyzed self-condensation of CP yields 2-cyclopentylidene cyclopentanone (2-CP) and 2,5-dicyclopentylidene cyclopentanone (3-CP). 2-CP has applications in fuels, fragrances, and flavors, and 3-CP is used as a precursor for diesel-grade products. In this study, solid base activated carbon monolith (ACM)-supported hydrotalcite catalysts (HT/ACM) were synthesized using traditional thermal calcination, rehydration, and air plasma techniques and demonstrated for continuous cyclopentanone self-condensation. Among the ACM-supported hydrotalcites, the HT/ACM activated by air plasma at 100 W for 1 min (PHT/ACM-100W) displayed a higher 2-CP space time yield of 641 g L-cat–1 h–1 and selectivity of 27% (220 °C, 1 atm, 0.73 min vapor phase contact time). PHT/ACM-100W displayed a higher CP conversion (42%) compared to the unsupported calcined (34%, 500 °C for 4 h) and rehydrated (39.5%, 8 h at 105 °C) hydrotalcite catalysts yet significantly lower space time yields, suggesting low hydrotalcite distribution and loading on the carbon monolith. The plasma-activated carbon monolith-supported hydrotalcite catalysts synthesized in this work are promising alternatives to the thermally activated and rehydrated hydrotalcites for the catalytic upgrading of biobased cyclic and linear ketones.
期刊介绍:
ndustrial & Engineering Chemistry, with variations in title and format, has been published since 1909 by the American Chemical Society. Industrial & Engineering Chemistry Research is a weekly publication that reports industrial and academic research in the broad fields of applied chemistry and chemical engineering with special focus on fundamentals, processes, and products.