02036nas a2200217   4500008004100000022001400041245009500055210006900150260007300219300001200292490000700304520125700311653001601568653001601584653001801600653001301618653001901631100002201650700002401672856012201696       2011                        eng d  a0169-131700aHeteropolyacid supported on montmorillonite catalyst for dehydration of dilute bio-ethanol0 aHeteropolyacid supported on montmorillonite catalyst for dehydra  aPO BOX 211, 1000 AE AMSTERDAM, NETHERLANDSbELSEVIER SCIENCE BVcAUG  a263-2710 v533 a<p>Vapour phase dehydration of dilute bio-ethanol (EtOH) to ethylene (E) and diethyl ether (DEE) is industrially relevant. Ethylene is an important raw material for many petrochemical products and Diethyl ether (DEE) can be used as an alternative fuel. The efficacy of montmorillonite (K-10) and dodecatungestophosphoric acid (DTPA) supported on montmorillonite (DTPA/K-10), has been evaluated in the current work in the dehydration of dilute bio-ethanol (80%m/m). The dehydration of ethanol and cracking of diethyl ether were studied independently. 30% m/m DTPA/K-10 was found to be more active with 74% ethanol conversion and 92% ethylene selectivity at 250 degrees C in comparison with other acid catalysts used. The merit of the process lies in its use of dilute bio-ethanol, a new avenue for ethylene production from a non-petroleum feedstock. Kinetic interpretation has been made by studying the important process parameters by using 30%m/m DTPA/montmorillonite as the catalyst. The mechanism of the dehydration of ethanol reaction suggests that two types of sites are responsible. The dehydration of ethanol and cracking of diethyl ether are second order reactions with weak adsorption of species. (C) 2011 Elsevier B.V. All rights reserved.</p>10aBio-ethanol10adehydration10aDiethyl ether10aEthylene10aHeteropolyacid1 aBokade, Vijay, V.1 aYadav, Ganapati, D.  uhttps://library.ncl.res.in/content/heteropolyacid-supported-montmorillonite-catalyst-dehydration-dilute-bio-ethanol-001889nas a2200265   4500008004100000022001400041245007600055210006900131260000800200300001500208490000600223520109100229653001301320653002101333653001101354653001101365653000801376653000901384100002301393700002301416700002801439700002201467700002601489856010801515       2022                        eng d  a2365-654900aMethanol-to-light olefins reaction using Zn-Ag modified SSZ-13 catalyst0 aMethanoltolight olefins reaction using ZnAg modified SSZ13 catal  cSEP  ae2022014760 v73 a<p>
	The 2 wt.% of Zn and Ag (Zn1-x-Ag-x; x=0.2, 0.4, 0.6 %) modified SSZ-13 (SZ-13) zeolite was prepared by wet-impregnation method, and its catalytic activity was demonstrated for methanol-to-olefin (MTO). The Zn-0.6-Ag-0.4/SZ-13 catalyst exhibited high catalytic activity due to change in properties of catalyst. The Zn particles were highly dispersed inside the SZ-13; while Ag particles were dispersed on the surface of SZ-13, confirmed by HRTEM and surface area. The small % of Ag over SZ-13 promotes ethylene production via aromatization of reaction, and highly dispersed Zn on SZ-13 help to produce stable ethylene and propylene. The Zn-0.6-Ag-0.4/SZ-13 catalyst showed (similar to 10 %) higher light olefin (87 %) selectivity than parent SZ-13 as well as mono metal incorporated SZ-13. The higher catalytic activity was attributed due to effect of both metals (Zn and Ag), where Ag promotes partial aromatization on the surface, and Zn increases the Lewis acidity in the zeolite pore. This catalyst can help to improve the selectivity of light olefin using MTO reaction.</p>
10aEthylene10aMethanol-to-Olef10aPropyl10aSilver10aSSZ10azinc1 aDange, Rutvija, M.1 aGawali, Chirag, B.1 aNiphadkar, Prashant, S.1 aBokade, Vijay, V.1 aNandanwar, Sachin, U.  uhttps://library.ncl.res.in/content/methanol-light-olefins-reaction-using-zn-ag-modified-ssz-13-catalyst