磷化制备的al2o3 -沸石上磷化镍催化剂用于棕榈酸甲酯加氢转化

IF 2.8 4区生物学 Q3 BIOTECHNOLOGY & APPLIED MICROBIOLOGY

Journal of chemical technology and biotechnology Pub Date : 2024-10-10 DOI:10.1002/jctb.7766

Ivan V Shamanaev, Evgenia N Vlasova, Dmitriy E Tsaplin, Irina G Danilova, Vera P Pakharukova, Evgeny Yu Gerasimov, Ilya V Yakovlev, Alexey Yu Fedorov, Anton L Maximov, Galina A Bukhtiyarova

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引用次数: 0

摘要

脂肪酸基原料的一级加氢转化是一种很有前途的获得高质量燃料的方法。该工艺以加氢脱氧、异构化和加氢裂化反应为基础。本文合成了Ni2P/ al2o3 -沸石催化剂，并对模型化合物棕榈酸甲酯进行了加氢转化试验。结果采用PPh3原位磷化金属Ni/ al2o3 -沸石前驱体制备了Ni2P催化剂。沸石（30 wt%）和薄水铝石的混合物被聚合和挤压得到支撑颗粒。以SAPO-11、ZSM-5、ZSM-22、ZSM-23和ZSM-12为分子筛组分。采用化学分析（ICP-AES）、低温N2吸附、h2 -温度程序还原、nh3 -温度程序解吸、吸附CO的傅里叶变换红外光谱、x射线衍射、透射电镜、x射线光电子能谱、27Al和31P魔角自旋核磁共振等物理化学方法对催化剂和载体进行了表征。在连续流固定床反应器中，在290 ~ 340℃，2 MPa， H2/进料= 600 Ncm3/cm3, LHSV = 5.3 h−1条件下，对催化剂进行了棕榈酸甲酯加氢转化（一级加氢脱氧-异构化-加氢裂化）的研究。含有SAPO-11的样品对C15和C16的异构烷烃具有较高的选择性（在340°C时为63%），含有zsm的样品对C5-C9裂解产物具有较高的选择性（在340°C时为55-100%），含有不同数量的异构烷烃（在340°C时为31-57%）。结论通过选择沸石组分的催化剂，可以在低温柴油到喷气燃料或汽油的范围内精细调节产品质量。©2024化学工业学会（SCI）。

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Ni phosphide catalysts on Al2O3-zeolite prepared by phosphidation for methyl palmitate hydroconversion

BACKGROUND

One-stage hydroconversion of fatty-acid based feedstocks is a promising way to obtain high-quality fuels. This process is based on hydrodeoxygenation, isomerization and hydrocracking reactions. In this work, Ni₂P/Al₂O₃-zeolite catalysts were synthesized and tested in hydroconversion of a model compound – methyl palmitate.

RESULTS

Ni₂P catalysts were prepared by in situ phosphidation of metallic Ni/Al₂O₃-zeolite precursors by PPh₃. Mixtures of zeolite (30 wt%) and boehmite were peptized and extruded to obtain the support granules. SAPO-11, ZSM-5, ZSM-22, ZSM-23 and ZSM-12 were used as a zeolite component. The catalysts and supports were characterized by a range of physicochemical methods: chemical analysis (ICP-AES), low-temperature N₂ adsorption, H₂-temperature programmed reduction, NH₃-temperature programmed desorption, Fourier transform infrared spectroscopy of adsorbed CO, X-ray diffraction, transmission electron microscopy, X-ray photoelectron spectroscopy, and ²⁷Al and ³¹P magic angle spinning nuclear magnetic resonance. The catalysts were studied in methyl palmitate hydroconversion (one-stage hydrodeoxygenation-isomerization-hydrocracking) in a continuous-flow fixed bed reactor at 290–340 °C, 2 MPa, H₂/feed = 600 Ncm³/cm³ and LHSV = 5.3 h⁻¹. SAPO-11 containing sample showed high selectivity to C15 and C16 iso-alkanes (63%, at 340 °C), and all ZSM-containing samples showed high selectivity to cracked C5–C9 products (55–100%, at 340 °C) with varying amounts of iso-alkanes (31–57%, at 340 °C).

CONCLUSION

The results show that by choosing the zeolite component of the catalyst it is possible to finely tune product quality in the range from low-temperature diesel fuel to jet fuel or gasoline. © 2024 Society of Chemical Industry (SCI).

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来源期刊

Journal of chemical technology and biotechnology 工程技术-工程：化工

CiteScore

7.00

自引率

5.90%

发文量

268

审稿时长

1.7 months

期刊介绍： Journal of Chemical Technology and Biotechnology(JCTB) is an international, inter-disciplinary peer-reviewed journal concerned with the application of scientific discoveries and advancements in chemical and biological technology that aim towards economically and environmentally sustainable industrial processes.