Journal ArticleDOI
Partial hydrogenation of sunflower oil in a membrane reactor
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TLDR
Partial hydrogenation of sunflower oil was carried out in a membrane reactor in pore-flow-through mode in n-heptane as solvent as mentioned in this paper, which consisted of a porous α-Al2O3 membrane impregnated with Pd or Pt as the active catalyst and was constructed as a loop of saturation vessel and membrane module.Abstract:
Partial hydrogenation of sunflower oil was carried out in a membrane reactor in pore-flow-through mode in n-heptane as solvent. The membrane reactor consisted of a porous α-Al2O3 membrane impregnated with Pd or Pt as the active catalyst and was constructed as a loop of saturation vessel and membrane module. Hydrogenation experiments were performed at different temperatures, hydrogen pressures and noble metals as catalysts. The experiments in the membrane reactor were compared with experiments in a slurry reactor with a powder catalyst for benchmarking.
The stearic acid content at an iodine value (IV) of about 80 was 10–15% in the membrane reactor and 45% in the slurry reactor, respectively. The selectivity for the monoene fatty acids could be improved with decreasing hydrogen pressures. The content of trans fatty acids at IV ≈ 80 was 30–45% in the membrane reactor, whereas in the slurry reactor 12% were obtained. For the trans-isomer formation, the influence of hydrogen pressure and temperature in the membrane reactor was rather low. Pd showed a higher activity and selectivity compared to Pt, but promoted the trans-isomerization to a greater extent.read more
Citations
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Heterogeneous Catalytic Hydrogenation Reactions in Continuous‐Flow Reactors
TL;DR: In this review article recent developments in continuous flow heterogeneous catalytic hydrogenation reactions using molecular hydrogen are summarized.
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Flow-through catalytic membrane reactors—Principles and applications
Thomas Westermann,Thomas Melin +1 more
TL;DR: In this article, a review and classification of publications dealing with catalytic membrane reactors in flow-through mode is presented, in contrast to other membrane reactor concepts, the membrane is operated in dead-end mode and no separation task is performed.
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Thermodynamic balance in reaction system of total vegetable oil hydrogenation
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Partial Hydrogenation of Soybean Oil with Minimal Trans Fat Production Using a Pt-Decorated Polymeric Membrane Reactor
TL;DR: In this article, an integral-asymmetric polyetherimide membrane sputtered with platinum to deliver hydrogen directly to or near the catalytic sites was used for partial hydrogenation of soybean oil.
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Continuous esterification to produce biodiesel by SPES/PES/NWF composite catalytic membrane in flow-through membrane reactor: Experimental and kinetic studies
Wenying Shi,Benqiao He,Yuping Cao,Jianxin Li,Feng Yan,Zhenyu Cui,Zhiqun Zou,Shiwei Guo,Xiaomin Qian +8 more
TL;DR: The results showed that the CCM structure had a significant effect on the acid conversion, and the conversions obtained from the model are in good agreement with the experimental data.
References
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Book
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TL;DR: In this article, the authors present an overview of shortening types, including Baking Shortenings, Frying Shortening Types, Dairy Analog Shortening, and Household Shortening.
Journal ArticleDOI
Edible oils: discrimination by 1H nuclear magnetic resonance
María D. Guillén,Ainhoa Ruiz +1 more
TL;DR: In this paper, the 1H nuclear magnetic resonance (NMR) spectra of 36 edible oil samples of 15 different botanical origins were recorded with a 300MHz instrument using deuterated chloroform as solvent.
Journal ArticleDOI
Palladium supported catalysts for the selective hydrogenation of sunflower oil
Bendaoud Nohair,Catherine Especel,Gwendoline Lafaye,Patrice Marecot,Lê Chiên Hoang,Jacques Barbier +5 more
TL;DR: In this article, the authors showed that the presence of amines in the reaction medium modifies the hydrogenating properties of the Pd/SiO2 catalyst and, as a result, it induces an increase of the selectivity toward the cis C18:1.
Journal ArticleDOI
Monolithic Catalysts as an Alternative to Slurry Systems: Hydrogenation of Edible Oil
Thorsten Boger,Martiin M. P. Zieverink,Michiel T. Kreutzer,Freek Kapteijn,Jacob A. Moulijn,William P. Addiego +5 more
TL;DR: The use of monolithic catalysts in multiphase applications has received increasing interest throughout the last years as discussed by the authors, and it is also demonstrated that the monolithic catalyst could be reused several times without significant changes in the product composition.
Journal ArticleDOI
Selectivity of partial hydrogenation reactions performed in a pore-through-flow catalytic membrane reactor
TL;DR: In this article, the selectivity of partial hydrogenation reactions of unsaturated substrates was studied in a membrane reactor operating at 323 K and 40 bar hydrogen pressure, where cross-linked polyacrylic acid palladium nanoparticles were incorporated as catalysts.
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