Metal exchanged heteropolytungstate: an efficient catalyst for the synthesis of formylated amines

Srivani, A.; Parameswaram, G.; Prasad, P. S. Sai; Lingaiah, N.

doi:10.1007/s11144-014-0702-6

Cited by 2 publications

(1 citation statement)

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“…Many studies have been made to improve the efficiency of the HPAs by supporting on various high surface area supports and by replacement of protons with alkali metals [16][17][18][19][20][21].…”

Section: Introductionmentioning

confidence: 99%

Adsorption–desorption and catalytic properties of SBA-15 supported cesium salts of 12-molybdophosphoric acid for the dehydration of ethanol

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et al. 2015

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Cesium salts of molybdophosphoric acid with varying amounts of the cations Cs 1 H 2 PMo 12 O 40 and Cs 3 PMo 12 O 40 have been prepared as pure or supported on SBA-15. The adsorption of ethanol and its temperature programmed desorption-TPD using thermogravimetry were studied for SBA-15 supported and unsupported Cs salts. The evolved gases during the adsorption-desorption of ethanol on CsHPM/ SBA-15 composites were identified by online mass spectrometry coupled with thermogravimetry. The main products observed in the evolved gases during the desorption of ethanol were C 2 H 4 , C 3 H 6 and unreacted ethanol. The amount of acidic sites of the composites was estimated by ammonia adsorption-desorption. The dehydration of ethanol was used to test the catalytic properties of the CsHPM samples incorporated on the silica matrix. SBA15-supported catalysts, appeared to be more active than bulk catalysts in vapor phase dehydration and dehydrogenation of ethanol reactions. The effect of the support leads to higher values of dehydration rates of ethanol as well as higher values of ethylene and acetaldehyde formation rates.

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