Ethanol to hydrocarbons using silver substituted polyoxometalates: Physicochemical and catalytic study

Mohamed Mokhtar; Sulaiman N. Basahel; Tarek T. Ali

Journal of Industrial and Engineering Chemistry, Vol.20, No.1, 46-53, January, 2014

DOI10.1016/j.jiec.2013.04.028 Export Citation

Ethanol to hydrocarbons using silver substituted polyoxometalates: Physicochemical and catalytic study

Mohamed Mokhtar, Sulaiman N. Basahel, and Tarek T. Ali^†

Chemistry Department, Faculty of Science, King Abdulaziz University, P.O. Box 80203, 21589 Jeddah, Saudi Arabia

E-mail:

Thermally stable and insoluble silver salts of 12-molybdophosphoric acid with varying amount of Ag cations were prepared. XRD results indicated the presence of single phase of AgxH3-xPMo12O40 (0 < x < 3). FTIR and Raman results indicated that Ag was incorporated in the secondary structure of Keggin ion. The catalytic conversion of ethanol increased in the order of H3PMo > Ag2PMo > Ag1PMo > Ag3PMo. Pure H3PMo is highly selective to dimethyl ether formation; in contrast AgxH3-xPMo12O40 catalysts offered better ethylene selectivity. The pyridine adsorption studies revealed that increase of Ag incorporating led to increase the Lewis acid sites.

Keywords:AgxH3-xPMo12O40;Keggin structure;Raman spectroscopy;Acid catalysis;Ethanol dehydration;Ethylene selectivity

[References]

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[Referenced By]

[1] Bokade VV, Yadav GD, Applied Clay Science., 53, 263 (2011)

[2] Gucbilmez Y, Dogu T, Balci S, Ind. Eng. Chem. Res., 45(10), 3496 (2006)

[3] Pereira CJ, Science., 285, 670 (1999)

[4] Kito- Borsa T, Cowley SW, Division of Energy & Fuels., 49(2), 856 (2004)

[5] Takahara I, Saito M, Inaba M, Murata K, Catal. Lett., 105(3-4), 249 (2005)

[6] Haber J, Pamin K, Matachowski L, Napruszewska B, Poltowicz J, J. Catal., 207(2), 296 (2002)

[7] Vazquez P, Pizzio L, Caceres C, Blanco M, Thomas H, Alesso E, Finkielsztein L, Lantano B, Moltrasio G, Aguirre J, J. Mol. Catal. A-Chem., 161(1-2), 223 (2000)

[8] Varisli D, Dogu T, Dogu G, Chem. Eng. Sci., 62(18-20), 5349 (2007)

[9] Ciftci A, Varisli D, Tokay KC, Sezgi NA, Dogu T, Chemical Engineering Journal., 207-208, 85 (2012)

[10] Suzuki S, Kogai S, Ono Y, Chemistry Letters., 13, 699 (1984)

[11] Niiyama H, Saito Y, Yoshida S, Echigoya E, Nippon Kagaku Kaishi., 1982, 569 (1982)

[12] Baba T, Watanabe H, Ono Y, Journal of Physical Chemistry., 87(13), 2406 (1983)

[13] Gurgul J, Zimowska M, Mucha D, Socha RP, Matachowski L, Journal of Molecular Catalysis A: Chemical., 351, 1 (2011)

[14] Matachowski L, Zimowska M, Mucha D, Machej T, Applied Catalysis B., 123-124, 448 (2012)

[15] Ali TT, Al-Thabaitib SA, Alyoubib AO, Mokhtar M, Journal of Alloys and Compounds., 496, 553 (2010)

[16] Southward BW, Vaughan JS, Oconnor CT, J. Catal., 153(2), 293 (1995)

[17] Narasimharao K, Brown DR, Lee AF, Newman AD, Siril PF, Tavener SJ, Wilson K, J. Catal., 248(2), 226 (2007)

[18] Na K, Okuhara T, Misono M, Journal of the Chemical Society, Faraday Transactions., 91(2), 367 (1995)

[19] Damyanova S, Fierro JLG, Chemistry of Materials., 10, 871 (1998)

[20] Corma A, Martinez A, Martinez C, J. Catal., 164(2), 422 (1996)

[21] Dias JA, Caliman E, Dias SCL, Microporous and Mesoporous Materials., 76, 221 (2004)

[22] Thiel J, Ritchie C, Miras HN, Streb C, Mitchell SG, Boyd T, Nieves M, Ochoa C, Rosnes MH, McIver J, Long D, Cronin L, Angewandte Chemie International Edition., 49, 6984 (2010)

[23] Marchal-Roch C, Laronze N, Guillou N, Teze A, Herve G, Appl. Catal. A: Gen., 199(1), 33 (2000)

[24] Bruckner A, Scholz G, Heidemann D, Schneider M, Herein D, Bentrup U, Kant M, J. Catal., 245(2), 369 (2007)

[25] Anzai A, Inumaru K, Yamanaka S, Journal of Alloys and Compounds., 432, 557 (2009)

[26] Poblet JM, Lopez X, B Co, Chemical Society Reviews., 32, 297 (2003)

[27] Timofeeva MN, Appl. Catal. A: Gen., 256(1-2), 19 (2003)

[28] Okumura K, Yamashita K, Hirano M, Niwa M, J. Catal., 234(2), 300 (2005)

[29] Devassy BM, Lefebvre F, Halligudi SB, J. Catal., 231(1), 1 (2005)

[30] Deltcheff CR, Fournier M, Franck R, Thouvenot R, Inorganic Chemistry., 22, 207 (1983)

[31] Kendell SM, Brown TC, Burns RC, Catal. Today, 131(1-4), 526 (2008)

[32] Baba T, Sakai J, Ono Y, Bulletin of the Chemical Society of Japan., 55, 2633 (1982)

[33] Davis BH, Keogh RA, Alerasool S, Zalewski DJ, Day DE, Doolin PK, J. Catal., 183(1), 45 (1999)

[34] Herrera JE, Kwak JH, Hu JZ, Wang Y, Peden CHF, Topics in Catalysis., 49, 259 (2008)

[35] Varisli D, Dogu T, Dogu G, Ind. Eng. Chem. Res., 48(21), 9394 (2009)

[36] Blaszkowski SR, Vansanten RA, J. Am. Chem. Soc., 118(21), 5152 (1996)