01415nas a2200169   4500008004100000022001400041245012500055210006900180260008100249300001400330490000700344520070200351100002001053700002201073700001801095856013201113       2005                        eng d  a0002-782000aConversion of fly ash - an environmentally detrimental waste to zeolite beta (BEA) for commercial catalytic applications0 aConversion of fly ash an environmentally detrimental waste to ze  a9600 GARSINGTON RD, OXFORD OX4 2DQ, OXON, ENGLANDbBLACKWELL PUBLISHINGcNOV  a3260-32630 v883 a<p>Zeolite beta (BEA) was synthesized hydrothermally using fly ash as a combined source of alumina and silica. The overall crystallization period required to obtain pure crystalline BEA zeolite was found to be slightly longer when fly ash was used. The physicochemical properties of BEA phases obtained using fly ash (FLBEA) and conventional source materials (CONBEA) were compared. The H/FLBEA catalyst has exhibited excellent catalytic performance in commercially important benzene isopropylation process. These results have demonstrated that converting fly ash into BEA zeolite not only alleviates the disposal problem but also turns an otherwise waste material into a marketable commodity.</p>1 aKasture, M., W.1 aBokade, Vijay, V.1 aJoshi, P., N.  uhttps://library.ncl.res.in/content/conversion-fly-ash-environmentally-detrimental-waste-zeolite-beta-bea-commercial-catalytic-002183nas a2200241   4500008004100000020002200041022001400063245011400077210006900191260005500260300001200315490000800327520135800335100002001693700002201713700001801735700001401753700001001767700001201777700001201789700001101801856012901812       2007                        eng d  a978-0-444-53068-4  a0167-299100aSynthesis and characterization of value added catalysts zeolite beta using environmentally detrimental flyash0 aSynthesis and characterization of value added catalysts zeolite   aBeijing, Peoples R ChinabElsevier Science BVcAUG  a438-4430 v1703 a<p>Fly ash is a major byproduct of Thermal power plant, which makes a lot of pollution to the environment due to its fineness. When a large amount of fly ash is dumped in the places near to power plants, it mixes in all segment of environment like water, air as well as soil. Though it can be utilized for different useful purposes, due to the lack of technical knowledge about how and proper motivation, no progress has been made in its utilization. It has been demonstrated that the fly ash can be used for making a value added catalyst zeolite beta by using simple and low cost process. In the present paper it is demonstrated that the fly ash can be used as a source of silica and alumina in the synthesis of value added catalyst zeolite beta. Moreover, the influence of different silica sources such as tetraethylortho silicate, silica sol and fumed silica on the physiochemical characteristics of well crystallized zeolite beta was also studied. The detailed characterization was carried out by using powder XRD, (27)Al and (29)Si MAS NMR, chemical analysis and low temperature nitrogen adsorption. Based on the data obtained from various systems containing different silica source, fumed silica is found to be most efficient source materials and showed superiority in the uniformity of aluminum distribution and possesses higher surface area.</p>1 aKasture, M., W.1 aBokade, Vijay, V.1 aJoshi, P., N.1 aKumar, R.1 aXu, R1 aGao, Z.1 aChen, J1 aYan, W  uhttps://library.ncl.res.in/content/synthesis-and-characterization-value-added-catalysts-zeolite-beta-using-environmentally-001689nas a2200169   4500008004100000022001400041245007300055210006900128260010600197300001400303490000700317520103500324100002101359700002001380700001801400856010101418       2008                        eng d  a0022-369700aInfluence of synthesis conditions on structural properties of MCM-480 aInfluence of synthesis conditions on structural properties of MC  aTHE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLANDbPERGAMON-ELSEVIER SCIENCE LTDcAUG  a2075-20810 v693 a<p>The influence of synthesis variables such as time, cetyltrimethyl ammonium hydroxide (CTAOH) concentration, water content, pH, temperature and silica source on the structural properties of Si-MCM-48 is investigated. Time-dependent studies on the progressive development of MCM-48 have indicated that synthesis time is a crucial parameter, which influences the unit cell parameter. The formation of different mesophases was observed when the concentration of CTAOH and pH of the initial gel were varied. The Si-29 MASNMR results showed that the (Q(2) +W-3)/Q(4) ratio decreases with the increase in synthesis temperature. On account of increase in W units at high-temperature synthesis run, Si-MCM-48 with highly polymerized silica walls with lower surface area was obtained when compared with Si-MCM-48 prepared at lower temperature. Such effect was not significant when Si-MCM-48 was synthesized at the same temperature but using silica sol as a source in place of fumed silica. (c) 2008 Elsevier Ltd. All rights reserved.</p>1 aTaralkar, U., S.1 aKasture, M., W.1 aJoshi, P., N.  uhttps://library.ncl.res.in/content/influence-synthesis-conditions-structural-properties-mcm-48-0