@article { ISI:000348753400054,
	title = {Highly loaded well dispersed stable Ni species in NiXMg2AlOY nanocomposites: application to hydrogen production from bioethanol},
	journal = {Applied Catalysis B-Environmental},
	volume = {166},
	year = {2015},
	month = {MAY},
	pages = {485-496},
	publisher = {ELSEVIER SCIENCE BV},
	address = {PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS},
	abstract = {<p>Inexpensive NiXMg2AlOY nanocomposites with high Ni content (Ni wt\% \&gt; 40\%) are developed as efficient catalysts for the sustainable hydrogen production from a mixture of ethanol and water at low temperature. The NiXMg2AlOY nanocomposites are composed of small and uniform nanoparticles (4-6 nm) of NiO, Ni-Mg-(Al)-O and/or MgO. The strong interactions existing between Ni2+ cations and Mg2+ and/or Al3+ cations either in the Ni-Mg-(Al)-O solid solution and/or at the interface of nanoparticles of NiO and/or Ni-Mg-(Al)-O make the catalyst highly active and stable. The behavior of the solids is analyzed in the presence of low and high concentrations of ethanol while maintaining a H2O/EtOH molar ratio of 3. The NiXMg2AlOY catalysts are shown to be efficient toward H-2 production between 250 and 650 degrees C. In the presence of low concentration of ethanol, on the highly loaded Ni compound (Ni12Mg2AlOY), total conversion of ethanol is obtained at 250 degrees C without formation of CO and carbon, and at 300 degrees C a H-2 yield of 3 mol moletEtOH(-1) is obtained without the formation of CO, exhibiting a remarkable stability with the time on stream even if some carbon is formed. In high concentration of ethanol, total conversion of ethanol is obtained at 450 degrees C on the highly loaded Ni compound (Ni12Mg2AlOY). In such conditions, a stable co-generation of carbon nanofibrous materials which amount increases with Ni content is also obtained. The catalytic stability is related to the type and morphology of the carbon species formed. The correlations among the catalyst properties, the catalytic performances and the characterizations are thoroughly discussed. (C) 2014 Elsevier B.V. All rights reserved.</p>},
	keywords = {Ethanol, Hydrogen, Nanofibrous carbon, nickel oxide, Steam reforming},
	issn = {0926-3373},
	doi = {10.1016/j.apcatb.2014.11.052},
	author = {Fang, Wenhao and Paul, Sebastien and Capron, Mickael and Biradar, Ankush V. and Shubhangi B. Umbarkar and Dongare, Mohan K. and Dumeignil, Franck and Jalowiecki-Duhamel, Louise}
}
@article {46160,
	title = {Hydrophobic WO3/SiO2 catalyst for the nitration of aromatics in liquid phase},
	journal = {Applied Catalysis A-General},
	volume = {574},
	year = {2019},
	month = {MAR},
	pages = {105-113},
	type = {Article},
	abstract = {<p>WO3/SiO2 solid acid catalyst synthesized using sol gel method has shown promising activity (up to 65\% conversion) for aromatic nitration in liquid phase using commercial nitric acid (70\%) as nitrating agent without using any sulfuric acid. The water formed during the reaction as well as water from dilute nitric acid (70\%) was removed azeotropically, however due to the hydrophilic nature of the catalyst, some water gets strongly adsorbed on catalyst surface forming a barrier layer between catalyst and organics. This prevents effective adsorption of substrate on catalyst surface for its subsequent reaction. To improve the activity further, the hydrophilic/hydrophobic nature of the catalyst was altered by post modification by grafting with commercial short chain organosilane (Dynasylan 9896). The modified 20\% WO3/SiO2 catalyst when used for o-xylene nitration in liquid phase, showed significant increase in the conversion from 65\% to 80\% under identical reaction conditions. Catalyst characterization revealed decrease in the surface area of 20\% WO3/SiO2 from 356 m(2)/g to 302 m(2)/g after grafting with Dynasylan 9896. The fine dispersion of WO3 particles (2-5 run) on silica support was not affected due to modification. NMR and FTIR study revealed the decrease in surface hydroxyl groups imparting hydrophobicity to the catalyst. Interestingly the total acidic sites of the catalyst remained almost unaltered (0.54 mmol NH3/g) even after modification. Even though, the acidity and other characteristics of the catalyst did not change appreciably, there was a considerable increase in the o-xylene conversion which can be ascribed to the hydrophobic nature of the catalyst.</p>
},
	keywords = {Aromatic nitration, grafting, heterogeneous catalysis, Hydrophobic, Sol-gel synthesis},
	issn = {0926-860X},
	doi = {10.1016/j.apcata.2019.02.002},
	author = {Kulal, A. B. and Kasabe, M. M. and Jadhav, P. V. and Dongare, M. K. and Umbarkar, S. B.}
}
