Search Results - "Venugopal, Akula"

Influence of acid-base sites on ZnO-ZnCr2O4 catalyst during dehydrocyclization of aqueous glycerol and ethylenediamine for the synthesis of 2-methylpyrazine: Kinetic and mechanism studies by VENUGOPAL, Akula, SARKARI, Reema, ANJANEYULU, Chatla, KRISHNA, Vankudoth, MANDARI KOTESH KUMAR, NARENDER, Nama, AYTAM HARI PADMASRI

“…The physicochemical characteristics of ZnO-ZnCr2O4 (Zn-Cr-O) mixed oxides were determined by adsorption and spectroscopic methods. The catalytic activities of…”
Get full text

Rice Husk Ash Derived SiO2 for Template Free Synthesis of H-ZSM-5 Support for Ni Catalyst: Investigation on Non-Oxidative CH4 Cracking for Clean H2 Production by Kandula, Manasa, Gutta, Naresh, Aytam, Hari Padmasri, Perupogu, Vijayanand, Manda, Kalpana, Akula, Venugopal

“…H-ZSM-5(RH) was synthesized using rice husk without an organic reagent and explored it as a support for Ni in the catalytic cracking of methane (CCM). Detailed…”
Get full text

Catalytic Decomposition of Methane to Hydrogen and Carbon Nanofibers over Ni−Cu−SiO2 Catalysts by Ashok, Jangam, Reddy, Padigapati Shiva, Raju, Gangadhara, Subrahmanyam, Machiraju, Venugopal, Akula

“…Highly active and stable Ni−Cu−SiO2 catalysts are prepared by a coprecipitation method and are employed for direct decomposition of methane to hydrogen and…”
Get full text

Synthesis of 2-Methylpyrazine Using Crude Glycerol over Zn-Cr-O Catalyst: A Value Addition Process for the Utilization of Biodiesel By-Product by Reema Sarkari, Kotesh Kumar Mandari, Sudhakar Medak, Kishore Ramineni, Hari Padmasri Aytam, Venugopal Akula

“…Mixed oxides of ZnO and Cr2O3 with varied mole ratios were synthesized, characterized, and evaluated for the dehydrocyclization of crude glycerol for the…”
Get full text

Chemoselective Hydrogenation of the Olefinic Bonds Using a Palladium/Magnesium-Lanthanum Mixed Oxide Catalyst by Kantam, Mannepalli Lakshmi, Kishore, Ramineni, Yadav, Jagjit, Sudhakar, Medak, Venugopal, Akula

“…A palladium/magnesium‐lanthanum mixed oxide catalyst is found to be an efficient heterogeneous catalyst for the chemoselective hydrogenation of olefinic double…”
Get full text

Catalytic decomposition of CH4 over NiO-Al2O3-SiO2 catalysts : Influence of catalyst preparation conditions on the production of H2 by ASHOK, Jangam, RAJU, Gangadhara, PADIGAPATI SHIVA REDDY, SUBRAHMANYAM, Machiraju, VENUGOPAL, Akula

Get full text

The effects of thermal treatment of ZnO–ZnCr2O4 catalyst on the particle size and product selectivity in dehydrocyclization of crude glycerol and ethylenediamine by Sarkari, Reema, Krishna, Vankudoth, Sudhakar, Medak, Rao, Tumula Venkateshwar, Padmasri, Aytam Hari, Srinivas, Darbha, Venugopal, Akula

“…The ZnO–ZnCr 2 O 4 (Zn–Cr–O) sample obtained by decomposition of Zn-Cr hydrotalcite precursor was subjected to the thermal treatment at different temperatures…”
Get full text

The water-gas shift reaction over Au-based, bimetallic catalysts. The Au-M (M=Ag, Bi, Co, Cu, Mn, Ni, Pb, Ru, Sn, Tl) on iron(III) oxide system by VENUGOPAL, Akula, ALUHA, James, SCURRELL, Mike S

“…The bimetallic Au-M/Fe2O3 catalysts were prepared by deposition coprecipitation method with Au/M atomic ratio of 1. All the catalysts were measured for WGS…”
Get full text

Production of COx free hydrogen by catalytic decomposition of methane over Ni/HY catalysts by ASHOK, Jangam, SATHU NAVEEN KUMAR, SUBRAHMANYAM, Machiraju, VENUGOPAL, Akula

“…In this present paper, we report catalytic decomposition of methane over Ni/HY catalysts, with varying Ni loading at 550 °C and atmospheric pressure. The…”
Get full text

Cu–Zn–Cr2O3 Catalysts for Dimethyl Ether Synthesis: Structure and Activity Relationship by Venugopal, Akula, Palgunadi, Jelliarko, Jung, Kwang Deog, Joo, Oh-Shim, Shin, Chae-Ho

“…The CuO dispersed on ZnCr 2 O 4 catalysts derived from Cu–Zn–Cr hydrotalcite like layered double hydroxide precursors with varying Zn/Cr ratios have been…”
Get full text

Promoting effect of titanium on C―O hydrogenolysis of erythritol to 1,4-butanediol over Pt/W/Ti-SBA-15 catalysts by Bhowmik, Susmita, Akula, Venugopal, Sethia, Govind, Marimuthu, Banu, Darbha, Srinivas

“…The C―O hydrogenolysis of erythritol was investigated using Pt/W/Ti-SBA-15 catalysts (4 wt% Pt, 1 wt% W and Si/Ti molar ratio = 50, 33, 20 and 10)…”
Get full text

Influence of Brønsted acid sites on chemoselective synthesis of pyrrolidones over H-ZSM-5 supported copper catalyst by Boosa, Venu, Varimalla, Shirisha, Dumpalapally, Mahesh, Gutta, Naresh, Velisoju, Vijay Kumar, Nama, Narender, Akula, Venugopal

“…[Display omitted] •A cheaper Cu/H-ZSM-5 catalyst demonstrated stable chemoselective activity.•Catalyst was reusable with consistent activity up to 94%…”
Get full text

Role of Brønsted and Lewis acid sites on Ni/TiO2 catalyst for vapour phase hydrogenation of levulinic acid: Kinetic and mechanistic study by Kumar, Velisoju Vijay, Naresh, Gutta, Sudhakar, Medak, Tardio, James, Bhargava, Suresh K., Venugopal, Akula

“…[Display omitted] •A non-noble metal catalyst is reported for aqueous LA hydrogenation to GVL.•All the reactions are carried out in the vapour phase at…”
Get full text

Effect of method of preparation of Ni and/or Cu supported on ZSM-5 catalysts for the aqueous phase hydrogenation of levulinic acid to γ-valerolactone by Varimalla, Shirisha, Manda, Kalpana, Boggala, Sasikumar, Nappuni, Rohitha Chozhiyath, Inkollu, Sreedhar, Aytam, Hari Padmasri, Akula, Venugopal

“…A series of Cu and Ni supported on ZSM-5 catalysts were synthesized by ion exchange (IE) and impregnation (IMP) techniques and examined for the aqueous phase…”
Get full text

Evaluation of in-situ formed La2O3–TiO2–La2O2CO3 nanocomposite photocatalyst for H2 production by Mandari, Kotesh Kumar, Aytam, Hari Padmasri, Varimalla, Shirisha, Velisoju, Vijay Kumar, Akula, Venugopal

“…The photocatalytic evolution of H2 over La2O3 decorated TiO2 catalyst was examined under solar light. It was observed that during the course of the reaction,…”
Get full text

Zero-emission hydrogen production by CH4 pyrolysis over Ni/Ferrierite catalyst: Examination of the deactivated catalysts for electrical conductivity and H2 storage properties by Manda, Kalpana, Boggala, Sasikumar, Varimalla, Shirisha, Aytam, Hari Padmasri, Basak, Pratyay, Inkollu, Sreedhar, Akula, Venugopal

“…An economic route for the generation of hydrogen and utilization of carbon nanofibers (CNFs) was achieved by CH4 cracking over 20 wt%Ni/FER catalyst. The…”
Get full text

Rutile TiO2 a desirable support for Ni catalyst in the synthesis of γ-valerolactone: Influence of titania crystal phase on the product distribution by Varimalla, Shirisha, Boggala, Sasikumar, Manda, Kalpana, Aytam, Padmasri Hari, Akula, Venugopal

“…Rutile TiO2 was identified as a suitable support for nickel than the anatase form in the selective conversion of levulinic acid (LA) to γ-valerolactone (GVL)…”
Get full text

Cerium sulfate doped ZrO2 as a solid acid catalyst for the synthesis of polyoxymethylene dimethyl ethers: Influence of Brønsted acidity on the catalytic activity and product selectivity by Dumpalapally, Mahesh, Boggala, Sasikumar, Nappuni, Rohitha Chozhiyath, Varimalla, Shirisha, Akula, Venugopal

“…[Display omitted] •PODE3–5 is an exceptionally good diesel blender.•CeO2-SO42−/ZrO2 showed promising activity towards PODE chain propagation.•Good to excellent…”
Get full text

Elucidation of surface active sites by formic acid adsorbed IR studies in the hydrogenation of levulinic acid to valeric acid over rare earth metal doped titania supported nickel catalysts by Peddakasu, Ganga Bhavani, Velisoju, Vijay Kumar, Gutta, Naresh, Medak, Sudhakar, Dumpalapally, Mahesh, Akula, Venugopal

“…[Display omitted] •Valeric acid produced from levulinic acid in a single-step using formic acid as H2 source .•Weak Lewis and strong Brønsted basic sites on…”
Get full text

HY and H[beta] Zeolites Mediated C-C Bond Formation via Addition/Substitution Reaction of 1,3-Dicarbonyl Compounds to Alcohols and Alkenes by Boosa, Murali, Yennamaneni, Divya Rohini, Chevella, Durgaiah, Amrutham, Vasu, Gajula, Krishna Sai, Madasu, Ramulamma, Akula, Venugopal

“…We investigated direct addition reaction of [beta]-diketone with several alcohols and alkenes employing solid acid zeolites (HY & H[beta]). The presence of…”
Get full text