01758nas a2200229   4500008004100000022001400041245007200055210006900127260007300196300001200269490000700281520100100288653001301289653001901302653002301321653001701344653001901361100001801380700001201398700002201410856009601432       2009                        eng d  a1003-995300aDisproportionation of ethylbenzene in the presence of C-8 aromatics0 aDisproportionation of ethylbenzene in the presence of C8 aromati  aPO BOX 211, 1000 AE AMSTERDAM, NETHERLANDSbELSEVIER SCIENCE BVcSEP  a369-3740 v183 a<p>The selective synthesis of p-diethylbenzene (p-DEB) by disproportionation of ethylbenzene (EB) in the presence of aromatics like m- and p-xylene isomers has been studied over a pore size regulated HZSM-5 catalyst. The industrial feed having different compositions of ethylbenzene and xylene isomers was used for the experimentation. Hence, they were expected to hinder the movement of reactant molecules both on the external surface and within the zeolite channels. It was observed that irrespective of the different feed compositions the concentration of the xylene isomers was intact in the product. There is no other byproducts formation like para-ethylmethyl benzene. The effects of varying the concentration of aromatic compounds in the feed on ethylbenzene conversion and product distribution over the parent and modified H-ZSM-5 catalyst have been discussed. Ethylbenzene disproportionation reaction follows the pseudo first order reaction with an activation energy of 8.6 kcal/mol.</p>10aCatalyst10adiethylbenzene10adisproportionation10aethylbenzene10axylene isomers1 aSharnappa, N.1 aPai, S.1 aBokade, Vijay, V.  uhttps://library.ncl.res.in/content/disproportionation-ethylbenzene-presence-c-8-aromatics-002159nas a2200265   4500008004100000022001400041245009700055210006900152260000800221300001200229490000700241520129500248653001801543653001801561653001301579653002301592653001801615653001101633100002401644700002401668700002601692700002801718700002201746856012501768       2021                        eng d  a0272-635100aActive nickel hollow nanosphere supported over SiO2 catalyst for reduction of nitro compound0 aActive nickel hollow nanosphere supported over SiO2 catalyst for  cAPR  a325-3350 v403 a<p>
	Nickel hollow nanospheres (Ni HNSs) was prepared by solvothermal method using mixture of ethylenediamine (EN) and ethanol (ET), sodium borohydride as reducing agent and nickel chloride hexahydrate as precursor. The particle size of the Ni HNSs were tuned by varying several parameters including precursor concentrations, reaction temperatures (130-190 degrees C), and ET to EN volume ratios. The particle size and morphology of Ni HNSs were confirmed by dynamic light scattering and transmission electron microscope, respectively. Spherical shape of Ni nanoparticles of 300 nm size having similar to 200 nm hollow space and 50 nm thickness was achieved at optimize condition of 4:6 volume ratio of ET/EN, 150 degrees C temperature, 0.1 M NaBH4 concentration, and 7 h. Ni HNSs supported over SiO2 (Ni HNSs/SiO2) with different loading of Ni HNSs (1-10 wt.%) were prepared by impregnation method. The catalyst was characterized by X-ray diffraction, and inductively coupled plasma - optical emission spectroscopy. The catalytic performance of Ni HNSs/SiO2 was carried out in the reduction of 4-Nitrophenol (4-NP) to 4 - Aminophenol (4-AP). 5 wt.% Ni HNSs/SiO2 exhibited 87% reduction of 4-NP in 25 min and stable up to 6 catalyst cycles due to higher surface area of the catalyst.</p>
10a4-Aminophenol10a4-nitrophenol10aCatalyst10ahollow nanospheres10aNanoparticles10aNickel1 aPawar, Priyanka, S.1 aLokhande, Aboli, A.1 aNandanwar, Sachin, U.1 aNiphadkar, Prashant, S.1 aBokade, Vijay, V.  uhttps://library.ncl.res.in/content/active-nickel-hollow-nanosphere-supported-over-sio2-catalyst-reduction-nitro-compound