PVA embedded hydrotalcite membranes as basic catalysts for biodiesel synthesis by soybean oil methanolysis

Guerreiro, L.; Pereira, Patrícia; Fonseca, Isabel; Aranda, Rosa María Martín; Ramos, A.M.; Dias, João M. L.; Oliveira, Rui; Vital, J.

doi:10.1016/j.cattod.2010.04.046

Cited by 53 publications

(33 citation statements)

References 21 publications

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“…[19][20][21][22][23][24] Because of its superior hydrophilicity, citric acid (CA) cross-linked PVA membrane has been used as a pervaporation membrane to separate water during esterification but not as a catalyst support. 22 In addition, PVA was used as a main membrane matrix to prepare poly (styrene sulfonic acid) (PSSA)/PVA membrane for catalyzing esterification although its role as a water absorber was not recognized.…”

Section: Introductionmentioning

confidence: 99%

Esterification of fatty acids from waste cooking oil to biodiesel over a sulfonated resin/PVA composite

Zhang

Gao

Zhao

et al. 2016

Catal. Sci. Technol.

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(2016) Esterification of fatty acids from waste cooking oil to biodiesel over a sulfonated resin/PVA composite. Catalysis Science and Technology, 2016 (6). pp. 5590-5598. ISSN 2044-4761 Access from the University of Nottingham repository: http://eprints.nottingham.ac.uk/33644/1/ZhangHL%20Catalysis%20Science %20%26%20Technology%202016%20online.pdf Copyright and reuse:The Nottingham ePrints service makes this work by researchers of the University of Nottingham available open access under the following conditions. This article is made available under the University of Nottingham End User licence and may be reused according to the conditions of the licence. For more details see: http://eprints.nottingham.ac.uk/end_user_agreement.pdf A note on versions:The version presented here may differ from the published version or from the version of record. If you wish to cite this item you are advised to consult the publisher's version. Please see the repository url above for details on accessing the published version and note that access may require a subscription. Sulfonated cation exchange resins (s-CER) have been widely studied as a replacement of liquid acids for the catalysis of esterification of free fatty acids (FFAs) to produce biodiesel with water as the only by-product. However, the water produced has strong affinity to sulfonate groups in s-CER, which blocks the reactive sites for esterification and thus reduces the activity of the catalyst. To overcome this technical barrier, we have designed an s-CER/PVA composite by incorporating s-CER fines within a poly (vinyl alcohol) (PVA) matrix. PVA has much stronger absorption preference of water than s-CER and has very low selectivity for the reactants (FFAs and methanol), which enables the continuous removal of the produced water and liberation of reactive sulfonate sites in s-CER for catalysis. With s-CER/PVA, the FFAs conversion was increased from 80.1 % to 97.5 % after 8-hour reaction and the turnover frequency (TOF) was increased more than 3.3 times. The TOF of s-CER/PVA was also 2.6 times of that of sulfuric acid, suggesting that the water less, heterogeneous sulfonate sites are more reactive than water-blocked homogeneous ones. The reusability of the s-CER/PVA was also enhanced due to that the produced water that could cause deactivation of the s-CER was largely removed by PVA.

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Section: Introductionmentioning

confidence: 99%

Esterification of fatty acids from waste cooking oil to biodiesel over a sulfonated resin/PVA composite

Zhang

Gao

Zhao

et al. 2016

Catal. Sci. Technol.

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“…• Poly (vinyl alcohol) (PVA) membranes: This type of membrane, which has been applied in biodiesel production (Guerreiro et al, 2010(Guerreiro et al, , 2006Sarkar et al, 2010;Zhu et al, 2010), is characterized by high hydrophilicity, good thermal properties, and good chemical resistance (Guan, Chung, Huang, Chng, & Kulprathipanja, 2006). But this kind of membrane needs to be modified before it can be transformed into a catalytically active membrane.…”

Section: Prevalent Catalystsmentioning

confidence: 99%

“…It has been observed that membranes that are capable of swelling in oil give higher biodiesel yields (Guerreiro et al, 2006(Guerreiro et al, , 2010. It has been observed that membranes that are capable of swelling in oil give higher biodiesel yields (Guerreiro et al, 2006(Guerreiro et al, , 2010.…”

Section: Prevalent Catalystsmentioning

confidence: 99%

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Membrane reactors for biodiesel production and processing

Rahimpour

2015

Membrane Reactors for Energy Applications and Basic Chemical Production

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“…The application of membrane as part of solid catalyst or the support of heterogeneous catalyst also extends the application of catalysts. This alternative was recently used in membrane catalytic process and was a potential material in membrane separation and reaction processes . These catalytic membranes combined solid catalysts with polymeric provide the possibility of using the membrane reactors to increase conversion by simultaneously removing a reaction product in equilibrium‐limited reactions .…”

Section: Introductionmentioning

confidence: 99%

Preparation and characterization of inorganic acid catalytic membrane for biodiesel production from oleic acid

Gao

et al. 2015

Asia-Pacific J Chem Eng

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An inorganic catalytic membrane constructed of a ceramic membrane (CM) support and catalytic coating (active component SO 4 2À /TiO 2 ) was prepared and used as a heterogeneous catalyst in the esterification of oleic acid with methanol for biodiesel production. SO 4 2À /TiO 2 -CM catalytic membrane was analyzed by Fourier transform infrared spectroscopy, X-ray diffraction patterns, and scanning electron microscopy together with energy dispersive analyzer for X-ray (EDS). It was found that the SO 4 2À /TiO 2 particles were well coated on the surface of CM matrix, and the oleic acid conversion could become 97.6% at the optimum condition.

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PVA embedded hydrotalcite membranes as basic catalysts for biodiesel synthesis by soybean oil methanolysis

Cited by 53 publications

References 21 publications

Esterification of fatty acids from waste cooking oil to biodiesel over a sulfonated resin/PVA composite

Esterification of fatty acids from waste cooking oil to biodiesel over a sulfonated resin/PVA composite

Membrane reactors for biodiesel production and processing

Preparation and characterization of inorganic acid catalytic membrane for biodiesel production from oleic acid

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