@article { ISI:000268042800012,
	title = {Support modification to improve the sulphur tolerance of Ag/Al2O3 for SCR of NOx with propene under lean-burn conditions},
	journal = {Applied Catalysis B-Environmental},
	volume = {90},
	number = {3-4},
	year = {2009},
	month = {AUG},
	pages = {416-425},
	publisher = {ELSEVIER SCIENCE BV},
	address = {PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS},
	abstract = {<p>Ag/Al2O3 catalysts with 1 wt\% SiO2 or TiO2 doping in alumina support have been prepared by wet impregnation method and tested for sulphur tolerance during the selective catalytic reduction (SCR) of NOx using propene under lean conditions, Ag/Al2O3 showed 44\% NOx conversion at 623 K, which was drastically reduced to 21\% when exposed to 20 ppm SO2. When Al2O3 support in Ag/Al2O3 Was doped with 1 wt\% SiO2 or TiO2 the NOx conversion remained constant in presence of SO2 showing the improved sulphur tolerance of these catalysts. Subsequent water addition does not induce significant deactivation. On the contrary, a slight promotional effect on the activity of NO conversion to nitrogen is observed after Si and Ti incorporation. FTIR study showed the sulphation of silver and aluminum sites of Ag/Al2O3 catalysts resulting in the decrease in the formation of reactive intermediate species such as -NCO, which in turn decreases NOx conversion to N-2. In the case of Ag/Al2O3 doped with SiO2 or TiO2, formation of silver sulphate and aluminum sulphate was drastically reduced, which was evident in FTIR resulting in remarkable improvement in the sulphur tolerance of Ag/Al2O3 catalyst. These catalysts before and after the reaction have been characterized with various techniques (XRD, BET surface area, transmittance FTIR and pyridine adsorption) for physico-chemical properties. (C) 2009 Elsevier B.V. All rights reserved.</p>},
	keywords = {Ag/Al2O3, Aluminum sulphate, DRIFTS, Selective catalytic reduction, Silver sulphate, SiO2, Sulphur tolerance, TiO2},
	issn = {0926-3373},
	doi = {10.1016/j.apcatb.2009.04.001},
	author = {Jagtap, Neelam and Shubhangi B. Umbarkar and Miquel, Pierre and Granger, Pascal and Dongare, Mohan K.}
}
@article {49867,
	title = {Essentials of Mo+6/Mo+4 and Ce+4/Ce+3 redox couples in auto-regenerated catalyst for dry methane reforming},
	journal = {Chemical Engineering Journal},
	volume = {522},
	year = {2025},
	month = {OCT },
	pages = {167586},
	type = {Article},
	abstract = {<p>
	Biogas is a potential renewable carbon resource, and dry reforming is one of the promising routes to mitigate via generating syngas, used as a building block for the synthesis of chemicals and fuels. Coke deposition and metal sintering of the reported catalyst systems are the major challenges to developing an economically feasible dry reforming process. Molybdenum oxide is a versatile material with properties like oxygen storage, oxygen mobility, and sulphur tolerance. Here, an oxygen storage capacity enhanced catalyst has been designed by applying a mono layer molybdenum oxide on ceria-magnesia-modified alumina support using a unique chemical vapor deposition method. The Ru and Ni used as active components, and Gd as a promoter were dispersed over the modified support via a precipitation-deposition approach. The most efficient composition is found to be 4 \% Ni, 0.5 \% Gd, and 0.5 \% Ru with Mo-promoted modified alumina with excellent stability up to 500 h for dry reforming reaction studies. Two redox cycles (Mo+6 to Mo+4 \&amp; Ce+4 to Ce+3) facilitated a significant number of oxygen vacancies, to limit surface carbon accumulation and support high catalytic stability and activity. The possible reaction pathways and stable surface intermediates were identified by using in-situ DRIFT studies, which included metal carbonyls, carboxylate species, and surface hydroxyl groups. Moreover, the DRIFT studies were supported with CH4-TPSR analysis and DFT studies evidence the formation of CHx species and subsequent oxidation. The additional advantage of the usage of molybdenum is the excellent S-tolerance capacity, which is fully scrutinized experimentally as well as theoretically.</p>
},
	keywords = {and Methane reforming, Coke resistant, Oxygen storage, Redox couple cycles, Sulphur tolerance},
	issn = {1385-8947},
	doi = {10.1016/j.cej.2025.167586},
	author = {Panda, Satyajit and Singh, Gaje and Kaishyop, Jyotishman and Gazi, Md Jahiruddin and Mule, Harshada Mahadev and Khan, Tuhin Suvra and Sharma, Ojasvi and Bordoloi, Ankur}
}
