Enzymatic Membrane Reactors in Applications of Membrane Separations Technology: Recent Advances

2011 ◽  
pp. 463-478
Keyword(s):  
Membrane Reactors ◽  
Membrane Separations ◽  
Recent Advances ◽  
Enzymatic Membrane

Enzymatic membrane reactors based on polysulfone/activated carbon

Desalination ◽  
2006 ◽  
Vol 199 (1-3) ◽  
pp. 438-440 ◽  
Author(s):  
Carles Torras ◽  
Débora Nabarlatz ◽  
Daniel Montané ◽  
Ricard Garcia-Valls
Keyword(s):  
Activated Carbon ◽  
Membrane Reactors ◽  
Enzymatic Membrane

Enzymatic Membrane Reactor for Chiral Drugs Synthesis

2012 ◽  
Author(s):  
Sing Long Wei ◽  
Azlina Harun@Kamaruddin ◽  
Subhash Bhatia
Keyword(s):  
Membrane Reactor ◽  
Kinetic Resolution ◽  
High Efficiency ◽  
Candida Rugosa ◽  
Optical Purity ◽  
Membrane Reactors ◽  
Chiral Drugs ◽  
Increasing Demand ◽  
Enzymatic Membrane Reactor ◽  
Enzymatic Membrane

Kepentingan kekiralan dalam aktiviti farmaseutikal telah menuntut kaedah yang berproduktif tinggi dan ekonomik untuk mensintesis enantiomer tulen secara komersil. Ubat moden kerap mengunakan enantiomer daripada suatu campuran stereo–isomer. Permintaan terhadap agen terapeutik yang tulen secara optik menjadi semakin kritikal kerana cirinya yang lebih spesifik berbanding campuran rasemik. Walau bagaimanapun, teknologi konvesional yang dipraktikkan selama ini menghasilkan campuran kedua-dua enantiomer yang sukar dipisahkan. Dalam konteks ini, resolusi berenzim ialah suatu cara untuk mengatasi masalah ini. Resolusi kinetik ialah suatu kaedah yang membolehkan pecahan substratum baki dihasilkan dengan ketulenan enantiomer yang tinggi. Secara unggul, satu daripada enantiomer bertindak balas secara enantiopilihan dengan kadar yang lebih cepat bagi suatu entiti kiral. Sebagai suatu teknologi yang berpotensi tinggi dalam penghasilan enantiomer spesifik, reaktor membran berenzim (EMR) berjaya mengatasi kekurangan yang dialami oleh sistem konvensional. Reaktor membran berenzim menggabungkan pengangkutan jisim memilih dengan tindak balas kimia, dan penyingkiran memilih produk daripada medium tindak balas. Ciri unggul yang ditunjukkan oleh reaktor membran berenzim ialah keupayaannya meningkatkan penghasilan tindak balas berenzim yang berbentuk perencat produk atau tindak balas yang tak sesuai secara termodinamik. Berbanding lipase lain yang ada, lipase daripada Candida rugosa dianggap sebagai suatu biomangkin yang unggul bagi resolusi campuran ester dan alkohol, kerana lipase ini bertindak secara enantiopilihan dan memangkin pensistesisan enantiomer melalui tindak balas hidrolisis. Dalam kertas kerja ini, penggunaan sistem EMR lipase tak boleh gerak terhadap perkembangan teknologi kiral dibincangkan secara umum, dengan tumpuan khusus diberikan terhadap penghasilan drug kiral. Kata kunci: Drug kiral; ketulenan secara optik; enantiomer; resolusi kinetik; reaktor membran berenzim The increasing popularity of chirality in pharmaceutical activity has stimulated an increasing demand for economical and high productive methods for commercial synthesis of pure enantiomers. Modern medicines often call for just one enantiomer of a stereo–isomer. The demand for these optically pure therapeutic agents is becoming more stringent due to its more–specific characteristic than racemic mixtures. However, conventional technologies yield a mixture of both isomers which are difficult to separate. In this context, enzymatic resolution is a subject of recent investigation, where high efficiency of heterogeneous and homogeneous catalyzed multiphase chemistries is being explored. Kinetic resolution is a method in which the residual substrate fraction can be obtained in high enantiomeric purity. Ideally one enantiomer reacts faster than the other with a chiral entity. As a potential technology for the production of specific enantiomer, enzymatic membrane reactor (EMR) has been reported to overcome some of the limitations of the conventional system. Enzymatic membrane reactors combine selective mass transport with chemical reactions, and the selective removal of products from the reaction site increases the conversion of product–inhibited or thermodynamically unfavorable reactions. Of all the lipase available, lipase from Cadida rugosa is given particular attention as an ideal biocatalyst for the resolution of racemic esters and alcohols, as it acts enantioselectively and prefers to catalyze the synthesis of one of the enantiomers using hydrolysis with higher preference. In this paper, the authors presented a review of unique potential application of lipase–immobilized EMR systems towards the development of chirotechnology that has been presented which mainly focuses on chiral drugs production. Key words: Chiral drugs, optical purity; enantiomers; kinetic resolution; enzymatic membrane reactors

Enzymatic membrane reactors: the determining factors in two separate phase operations

2011 ◽  
Vol 86 (8) ◽  
pp. 1032-1048 ◽  
Author(s):  
Joni Agustian ◽  
Azlina Harun Kamaruddin ◽  
Subhash Bhatia
Keyword(s):  
Membrane Reactors ◽  
Determining Factors ◽  
Enzymatic Membrane

scholarly journals Recent Advances in Catalysts and Membranes for MCH Dehydrogenation: A Mini Review

Membranes ◽  
2021 ◽  
Vol 11 (12) ◽  
pp. 955
Author(s):  
Durga Acharya ◽  
Derrick Ng ◽  
Zongli Xie
Keyword(s):  
Hydrogen Storage ◽  
Production Systems ◽  
Transportation Network ◽  
Membrane Reactors ◽  
Inorganic Membrane ◽  
Catalytic Dehydrogenation ◽  
Commercial Development ◽  
Dehydrogenation Reaction ◽  
Recent Advances ◽  
The Future

Methylcyclohexane (MCH), one of the liquid organic hydrogen carriers (LOHCs), offers a convenient way to store, transport, and supply hydrogen. Some features of MCH such as its liquid state at ambient temperature and pressure, large hydrogen storage capacity, its well-known catalytic endothermic dehydrogenation reaction and ease at which its dehydrogenated counterpart (toluene) can be hydrogenated back to MCH and make it one of the serious contenders for the development of hydrogen storage and transportation system of the future. In addition to advances on catalysts for MCH dehydrogenation and inorganic membrane for selective and efficient separation of hydrogen, there are increasing research interests on catalytic membrane reactors (CMR) that combine a catalyst and hydrogen separation membrane together in a compact system for improved efficiency because of the shift of the equilibrium dehydrogenation reaction forwarded by the continuous removal of hydrogen from the reaction mixture. Development of efficient CMRs can serve as an important step toward commercially viable hydrogen production systems. The recently demonstrated commercial MCH-TOL based hydrogen storage plant, international transportation network and compact hydrogen producing plants by Chiyoda and some other companies serves as initial successful steps toward the development of full-fledged operation of manufacturing, transportation and storage of zero carbon emission hydrogen in the future. There have been initiatives by industries in the development of compact on-board dehydrogenation plants to fuel hydrogen-powered locomotives. This review mainly focuses on recent advances in different technical aspects of catalytic dehydrogenation of MCH and some significant achievements in the commercial development of MCH-TOL based hydrogen storage, transportation and supply systems, along with the challenges and future prospects.

Recent advances in membrane reactors for hydrogen production by steam reforming of ethanol as a renewable resource

2019 ◽  
Vol 35 (3) ◽  
pp. 377-392 ◽  
Author(s):  
Majid Taghizadeh ◽  
Fatemeh Aghili
Keyword(s):  
Noble Metal ◽  
Steam Reforming ◽  
Membrane Reactor ◽  
Renewable Resource ◽  
Packed Bed ◽  
Membrane Reactors ◽  
Hydrogen Yield ◽  
Recent Advances ◽  
Steam Reforming Of Ethanol ◽  
The Impact

AbstractDuring the last decade, hydrogen has attracted lots of interest due to its potential as an energy carrier. Ethanol is one of the renewable resources that can be considered as a sustainable candidate for hydrogen generation. In this regard, producing hydrogen from ethanol steam reforming (ESR) would be an environmentally friendly process. Commonly, ESR is performed in packed bed reactors; however, this process needs several stages for hydrogen separation with desired purity. Recently, the concept of a membrane reactor, an attractive device integrating catalytic reactions and separation processes in a single unit, has allowed obtaining a smaller reactor volume, higher conversion degrees, and higher hydrogen yield in comparison to conventional reactors. This paper deals with recent advances in ESR in terms of catalyst utilization and the fundamental of membranes. The main part of this paper discusses the performance of different membrane reactor configurations, mainly packed bed membrane reactors, fluidized bed membrane reactors, and micro-membrane reactors. In addition, a short overview is given about the impact of ESR via different catalysts such as noble metal, non-noble metal, and bi-metallic catalysts.

scholarly journals A novel strategy to immobilize enzymes on microporous membranes via dicarboxylic acid halides

RSC Advances ◽  
2017 ◽  
Vol 7 (76) ◽  
pp. 48199-48207 ◽  
Author(s):  
Cuijing Liu ◽  
Daisuke Saeki ◽  
Hideto Matsuyama
Keyword(s):  
Dicarboxylic Acid ◽  
Enzyme Immobilization ◽  
Membrane Reactors ◽  
Microporous Membrane ◽  
Microporous Membranes ◽  
Membrane Surfaces ◽  
Novel Strategy ◽  
Enzymatic Membrane

A simple and efficient enzyme immobilization strategy on microporous membrane surfaces using dicarboxylic acid halides as a spacer offers a tool to design membranes used in enzymatic membrane reactors.

Large-scale enzymatic membrane reactors for tetracycline degradation in WWTP effluents

2015 ◽  
Vol 73 ◽  
pp. 118-131 ◽  
Author(s):  
R. Abejón ◽  
M. De Cazes ◽  
M.P. Belleville ◽  
J. Sanchez-Marcano
Keyword(s):  
Large Scale ◽  
Membrane Reactors ◽  
Tetracycline Degradation ◽  
Enzymatic Membrane

Simulation of transient state in enzymatic membrane reactors for resolution ofDL-valine and experimental validation

2001 ◽  
Vol 76 (9) ◽  
pp. 978-984 ◽  
Author(s):  
Antonio Bódalo ◽  
José L Gómez ◽  
Elisa Gómez ◽  
M Fuensanta Máximo ◽  
Asunción M Hidalgo
Keyword(s):  
Experimental Validation ◽  
Transient State ◽  
Membrane Reactors ◽  
Enzymatic Membrane
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