Manju Dhakad Tanwar

• Ph.D. Material Chemistry
• Principal Investigator at Five Elements Environment Ventures Pvt. Ltd.

Ceria nanofibers were prepared and deposited on SiC diesel particulate filters (DPFs), aiming at improving the soot-catalyst contact conditions and promote soot combustion at lower temperatures than in the noncatalytic case. In particular, the nanofibers have been found to be very active with respect to other ceria catalyst morphologies, due to the...

Ceria nanofibers were prepared and deposited on SiC diesel particulate filters (DPFs), aiming at improving the soot-catalyst contact conditions and promote soot combustion at lower temperatures than in the noncatalytic case. In particular, the nanofibers have been found to be very active with respect to other ceria catalyst morphologies, due to the...

CeO2 nanofibres have been prepared by means of the co-precipitation and ripening method. The morphology of the CeO2 and the synthesis duration were influenced by changes in the mole ratio of the NaOH/citric acid. Three kinds of precipitates were obtained by increasing the NaOH/citric acid ratio: stuck-in-bundle, fibre and flake morphologies. The co...

A range of perovskites including the substituted and promoted perovskite type catalytic materials have been designed and synthesized using various techniques. In this work we have studied the catalytic activities of a praseodymium substituted La0.8Pr0.2MnO3 and La0.7K0.1Pr0.2MnO3 based perovskites synthesized by coprecipitation, which is further im...

Alumina supported Co–K–Mo based mixed metal oxide type catalytic materials have been prepared by co-impregnation. These catalysts show excellent activity for carbon as well as diesel soot oxidation, which could be due to the redox properties of Mo and Co as well as to a synergistic effect of molybdenum, cobalt, and K contents. The catalyst containi...

Ru + Ag/US-Y and Ru + Co/US-Y based catalysts have been studied for their catalytic activity towards N2O decomposition, a reaction of current environmental importance. Ruthenium-cobalt based catalyst shows higher catalytic activity than the ruthenium-silver-based catalyst. Almost 90% conversion of N2O is achieved over Ru + Co/US-Y at 583 K with a m...

Ruthenium-exchanged H and Na forms of ultra stable-Y (US-Y) zeolite-based catalysts have been prepared by ion-exchange method. These catalysts have been characterized in detail, and evaluated for their catalytic activity towards NO-CO reaction. Highest catalytic activity was shown by 3 wt% Ru-Na-US-Y and almost 100% NO conversion was observed at 26...

Co3O4–CeO2 type mixed oxide catalyst compositions have been prepared by using co-precipitation method and, their catalytic activity towards diesel particulate matter (PM)/carbon oxidation has been evaluated under both loose and tight contact conditions. These catalysts show excellent catalytic activity for PM/carbon oxidation, despite their low sur...

Perovskite type catalysts with SrCoO3 and Sr0.8Ce0.2CoO3 compositions have been prepared by co-precipitation and other methods and, their catalytic activity towards diesel particulate matter (PM)/carbon oxidation has been evaluated under the loose contact condition. These catalysts show excellent catalytic activity for PM/carbon oxidation, despite...

The catalytic activities of strontium substituted La0.7Sr0.3MnO3 type perovskite catalysts for NO reduction using H2 as reducing agent has been studied, which is further improved by incorporation of Pt outside (0.1wt.%Pt/La0.7Sr0.3MnO3) and inside (La0.7Sr0.3Mn0.97Pt0.03O3) the perovskite lattice structure. Pt shows excellent enhancement in catalyt...

Lanthanum ruthenate materials with perovskite type structure can be easily synthesized with ruthenium in 4+ oxidation state. La3.5Ru4.0O13 type perovskite has been synthesized in unsupported and supported forms by using various methods. This perovskite type La3.5Ru4.0O13 phase shows high thermal stability and can therefore be used as a catalyst for...

Various amounts of ruthenia–cobaltate bimetallic catalyst supported on zirconia have been prepared by co-impregnation method and their catalytic activity towards soot/carbon oxidation has been evaluated using TG technique under the loose contact condition. These catalysts show good activity for carbon/soot oxidation, which is observed to be a facto...

Ruthenium (Ru)-based catalytic materials show good catalytic properties for oxidation reactions. However, their thermal stability has been a limitation. Ruthenia-based catalysts have been prepared by supporting different amounts on titania by the impregnation method. These ruthenia-based catalysts show good catalytic activity for carbon/soot oxidat...

The reduction of NO by CO over H and Na forms of Ru exchanged mordenite has been studied with ruthenium content of 0.2, 1 and 3wt.%. The catalysts were characterized with respect to X-ray diffraction, BET surface area, temperature programmed oxidation, and temperature programmed desorption of ammonia. These catalysts have been evaluated for their a...