The esterification of acetic acid with ethanol in a pervaporation membrane reactor

In this study, a boric acid coated carboxymethyl cellulose composite catalytic membrane was prepared and employed in a pervaporation assisted membrane reactor system to synthesize ethyl lactate. The effect of catalyst loading, temperature, initial molar feed ratio and reaction run time were investigated to evaluate reaction and separation ability of the hybrid pervaporation catalytic membrane reactor (PVCMR) system. The reaction performance was obtained by using lactic acid conversion data. Separation performance was determined as functions of flux and selectivity. It was observed that the conversion increased from 51 to 71 % as the temperature increased from 55 to 75°C. The best result was obtained as 83 % at 75°C when initial alcohol:acid molar ratio was three. Also, it was seen that the catalytic membrane preserved 93.6 % of its activity. The system efficiency was evaluated by comparison of PVCMR data to simply batch reactor data under the same conditions.

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“…Additionally, the temperature also increases the permeation rate of compounds through the membrane structure [51]. Fig.…”

Section: Effect Of the Reaction Temperaturementioning

confidence: 99%

Simultaneous separation performance of a catalytic membrane reactor for ethyl lactate production by using boric acid coated carboxymethyl cellulose membrane

Nigiz

Hilmioğlu

2016

Reac Kinet Mech Cat

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“…Gün geçtikçe üretim hacmi artan ester sektörünün daha ekonomik ve çevreci olarak üretilmesi için pervaporasyon destekli membran reaktör kullanımı birçok avantaj sağlamaktadır. Bu nedenle literatürde asetik asit ile etanol [19], butanol [23,24] ve propanol esterleşmesi [25], laktik asit-etanol [26] esterleşmesi gibi birçok reaksiyon pervaporasyon membran reaktörde gerçekleştirilmiştir.…”

Section: Introductionunclassified

Dahili Membran Reaktörde Kullanılmak Üzere Yüksek Performanslı Polivinil Alkol Membran Üretimi ve Etanol-Propiyonik Asit Esterleşme Reaksiyonunda Uygulaması

Nigiz¹

2018

SDÜ Fen Bil Enst Der

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Özet: Bu çalışmada, tek basamaklı reaktif ayırmanın yapıldığı bir membran reaktörde kullanılmak üzere yüksek dayanıma ve su tutma kapasitesine sahip çapraz bağlı polivinil alkol (PVA) membranı üretilmiş ve modül olarak kesikli reaktörde kullanılmıştır. Etanol ve propiyonik asit arasında Amberlit IR120 katalizörü eşliğinde gerçekleşen esterleşme reaksiyonunda membran modül eklenen kesikli reaktör ve klasik kesikli reaktörün asit dönüşüm sonuçları karşılaştırılmış, membranın klasik kesikli sistemde yaptığı dönüşüm iyileştirmesi değerlendirilmiştir. Reaksiyon sıcaklığının (50, 60, 70°C), katalizör miktarının (asit kütlesine göre %1, 2, 3) ve alkol:asit reaktan besleme oranının (M=1, 2, 3) her iki reaktördeki dönüşüme etkisi belirlenerek en iyi koşullar belirlenmiştir. Sonuç olarak membranın modül olarak eklendiği, sürekli ayırma yapmadığı ve suyu sorpladığı membran modüllü reaktörde klasik reaktöre göre %24-48 oranlarında dönüşüm iyileştirilmesi gerçekleştirilmiştir. En yüksek dönüşüm değeri ise 70°C sıcaklıkta ve M=3 besleme oranında modül kullanılan reaktörde %74 olarak elde edilmiştir. High-Performance Polyvinyl Alcohol Membrane Preparation to be Used for In-Situ Membrane Reactor and Application on Esterification Reaction of Ethanol-Propionic Acid KeywordsEsterification, Reactive separation, Polyvinyl alcohol membrane, Membrane reactor Abstract:In this study, high performance polyvinyl alcohol (PVA) membrane was prepared to be used in a single stage membrane reactor. PVA membrane was used as a membrane modul in a classical batch reactor. The conversion results of the reactors with and without membrane modul were compared in terms of the result of the reaction occured between ethanol and propionic acid via Amberlite IR 120. The conversion improvements were evaluated as a function of temperature in the range from 50°C to 70°C, catalyst concentration (%1-3) and alcohol:acid molar ratio (M=1 to 3). As a result of this study, conversion improvement in the range from %24-48 were achieved by using PVA membrane. The highest conversion result of %74 was achieved at 70°C when the alcohol:acid ratio was three.

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“…Carboxylic acid Alcohol Ester Water Up to today, in PV-esterification coupling systems, several types of commercial membranes have been used [50], including PERVATECH BV [13][14][15][16][17][18][19][20], GFT-1005 [67], polydimethylsiloxane [68], …”

Section: Model Reactions In Pv Assisted Processesmentioning

confidence: 99%

Potential of Pervaporation and Vapor Separation with Water Selective Membranes for an Optimized Production of Biofuels—A Review

2017

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Abstract:The development of processes based on the integration of new technologies is of growing interest to industrial catalysis. Recently, significant efforts have been focused on the design of catalytic membrane reactors to improve process performance. In particular, the use of membranes, that allow a selective permeation of water from the reaction mixture, positively affects the reaction evolution by improving conversion for all reactions thermodynamically or kinetically limited by the presence of water. In this paper, how pervaporation (PV) and vapor permeation (VP) technologies can improve the catalytic performance of reactions of industrial interest is considered. Specifically, technological approaches proposed in the literature are discussed with the aim of highlighting advantages and problems encountered in order to address research towards the optimization of membrane reactor configurations for liquid biofuel production in large scale.

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The esterification of acetic acid with ethanol in a pervaporation membrane reactor

Cited by 61 publications

References 7 publications

Simultaneous separation performance of a catalytic membrane reactor for ethyl lactate production by using boric acid coated carboxymethyl cellulose membrane

Simultaneous separation performance of a catalytic membrane reactor for ethyl lactate production by using boric acid coated carboxymethyl cellulose membrane

Dahili Membran Reaktörde Kullanılmak Üzere Yüksek Performanslı Polivinil Alkol Membran Üretimi ve Etanol-Propiyonik Asit Esterleşme Reaksiyonunda Uygulaması

Potential of Pervaporation and Vapor Separation with Water Selective Membranes for an Optimized Production of Biofuels—A Review

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