Monoliths as multiphase reactors: A review

Roy, Shaibal; Bauer, Tobias; Al‐Dahhan, Muthanna H.; Lehner, Peter; Turek, Thomas

doi:10.1002/aic.10268

Cited by 215 publications

(124 citation statements)

References 83 publications

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“…The literature on the influence of fluid dynamics [22][23][24][25], and mass and heat transfer [13,16,[26][27][28][29][30][31][32][33][34], as summarized by some key papers, can be quite extensive. It is important to keep these contributions in perspective when designing monolithic catalysts.…”

Section: Monolith Basicsmentioning

confidence: 99%

Monoliths: A Review of the Basics, Preparation Methods and Their Relevance to Oxidation

2017

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Considerable research has been conducted on monolithic catalysts for various applications. Strategies toward coating monoliths are of equal interest and importance. In this paper, the preparation of monoliths and monolithic catalysts have been summarized. More specifically, a brief explanation for the manufacturing of ceramic and metallic monoliths has been provided. Also, different methods for coating γ-alumina, as a secondary support, are included. Techniques used to deposit metal-based species, zeolites and carbon onto monoliths are discussed. Furthermore, monoliths extruded with metal oxides, zeolites and carbon are described. The main foci are on the reasoning and understanding behind the preparation of monolithic catalysts. Ideas and concerns are also contributed to encourage better approaches when designing these catalysts. More importantly, the relevance of monolithic structures to reactions, such as the selective oxidation of alkanes, catalytic combustion for power generation and the preferential oxidation of carbon monoxide, has been described.

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Section: Monolith Basicsmentioning

confidence: 99%

Monoliths: A Review of the Basics, Preparation Methods and Their Relevance to Oxidation

2017

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“…The behavior of gas-liquid flow in vertically oriented square channels was studied by a number of researchers in the context of monolith catalytic reactors for three phase reactions, and a review paper was published by Roy et al (2004). Although it has much in common with the flow in microchannels, flows in horizontal curved channels, which are often found in microreactor applications, were not in included in their focus.…”

Section: Fluid Motion In Liquid Slugmentioning

confidence: 99%

Fluid Behavior and Mass Transport Characteristics of Gas–Liquid and Liquid–Liquid Flows in Microchannels

Sotowa

2014

J. Chem. Eng. Japan

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It has been widely recognized that microchannels can be used to enhance mass transfer rate between two immiscible uids. This feature has attracted interests of many researchers in the eld of chemical engineering. To exploit such feature of microchannels, the ow characteristics and mass transfer behavior must be fully understood. In addition, to construct an industrial scale process consisting of microchannels, an e cient numbering-up technique is required. In this review, an overview of the recent literature on the uid ow and mass transfer behavior in multiphase ow in microchannels will be given. An attention is also paid to the numbering-up technique and extension to multiphase system involving three uids.

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“…Understanding the hydrodynamics of a monolithic reactor is crucial in achieving high lipid to biodiesel conversion rate (Krishna and Sie, 1994). The physical properties and superficial velocity of liquid as well as the type of structured packing used are the main hurdles that affect the hydrodynamic parameters such as liquid-holdup volume, flow rate, and pressure drop (Roy et al, 2004). Besides the high conversion rate, other factors such as low pressure drop, high substrate flow rate, lower axial dispersion, and back mixing, higher specific surface area, and high mass transfer rate are also desirable in designing a monolithic biodiesel reactor.…”

Section: Hydrodynamics Of Monolithmentioning

confidence: 99%

Green biodiesel production: a review on feedstock, catalyst, monolithic reactor, and supercritical fluid technology

et al. 2016

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Please cite this article as: Gumba R.E., Saallah S., Misson M., Ongkudon C.M., Anton A. Green biodiesel production: a review on feedstock, catalyst, monolithic reactor and supercritical fluid technology. Biofuel Research Journal 11 (2016) The advancement of alternative energy is primarily catalyzed by the negative environmental impacts and energy depletion caused by the excessive usage of fossil fuels. Biodiesel has emerged as a promising substitute to petrodiesel because it is biodegradable, less toxic, and reduces greenhouse gas emission. Apart from that, biodiesel can be used as blending component or direct replacements for diesel fuel in automotive engines. A diverse range of methods have been reported for the conversion of renewable feedstocks (vegetable oil or animal fat) into biodiesel with transesterification being the most preferred method. Nevertheless, the cost of producing biodiesel is higher compared to fossil fuel, thus impeding its commercialization potentials. The limited source of reliable feedstock and the underdeveloped biodiesel production route have prevented the full-scale commercialization of biodiesel in many parts of the world. In a recent development, a new technology that incorporates monoliths as support matrices for enzyme immobilization in supercritical carbon dioxide (SC-CO2) for continuous biodiesel production has been proposed to solve the problem. The potential of SC-CO2 system to be applied in enzymatic reactors is not well documented and hence the purpose of this review is to highlight the previous studies conducted as well as the future direction of this technology. © 2016 BRTeam. All rights reserved.Journal homepage: www.biofueljournal.com Research Unit, Universiti Malaysia Sabah, Kota Kinabalu, Sabah, 88400, Malaysia. Gumba et al. / Biofuel Research Journal 11 (2016) [431][432][433][434][435][436][437][438][439][440][441][442][443][444][445][446][447] Please cite this article as: Gumba R.E., Saallah S., Misson M., Ongkudon C.M., Anton A. Green biodiesel production: a review on feedstock, catalyst, monolithic reactor and supercritical fluid technology. Energy

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Monoliths as multiphase reactors: A review

Cited by 215 publications

References 83 publications

Monoliths: A Review of the Basics, Preparation Methods and Their Relevance to Oxidation

Monoliths: A Review of the Basics, Preparation Methods and Their Relevance to Oxidation

Fluid Behavior and Mass Transport Characteristics of Gas–Liquid and Liquid–Liquid Flows in Microchannels

Green biodiesel production: a review on feedstock, catalyst, monolithic reactor, and supercritical fluid technology

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