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ORE at CSIR-Institute of Minerals and Materials Technology: Recent submissions

Now showing items 3511-3520 of 3828

IMPORTANCE OF SPECIFIC SURFACE-AREA AND BASIC SITES OF THE CATALYST IN OXIDATIVE COUPLING OF CH4 OVER LIO/MGO CATALYSTS PREPARED BY PRECIPITATION METHODS

Parida, K.M.; Rao, S.B. (Reaction Kinetics And Catalysis Letters, 44(1), 1991: 95-101)

A low specific surface area was found to be the key factor for catalytic conversion of CH4 into C2H6 and C2H4. C2-hydrocarbon selectivity increases with increase in basicity of the catalyst.
OXIDATIVE COUPLING OF METHANE OVER BI2O3-P2O5-K2O/SM2O3

Parida, K.M.; Rao, S.B. (Reaction Kinetics And Catalysis Letters, 44(1), 1991: 103-108)

Oxidative coupling of methane over Bi2O3-P2O5-K2O/Sm2O3 takes place giving more C2H4 as compared to C2H6. Sm2O3 supported Bi-P-K is a more active and selective catalyst, than TiO2' gamma-Al2O3' SiO2 and MgO supported catalysts.
A GENERALIZED SPHERICAL MULTIPARTICLE MODEL FOR PARTICULATE SYSTEMS - FIXED AND FLUIDIZED-BEDS

Panigrahi, M.R.; Murty, J.S. (Chemical Engineering Science, 46(7), 1991: 1863-1868)
PREPARATION OF CALCIA STABILIZED ZIRCONIA USING A DC PLASMA

Bhattcharjee, S.; Syamaprasad, U.; Galgali, R.K.; Mohanty, B.C. (Materials Letters, 11(1-2), 1991: 59-62)

A method of preparation of calcia partially stabilised zirconia using a dc plasma is presented. An ingenious extended arc dc plasma reactor (20 kW) is used for plasma treatment of premixed oxides to yield stabilised zirconia. ...
EXTRACTION OF TUNGSTEN FROM SCHEELITE CONCENTRATES BY SODA ASH ROAST-LEACH METHOD

Paramguru, R.K.; Jena, K.N.; Sahoo, P.K. (Transactions Of The Institution Of Mining And Metallurgy Section C-Mineral Processing And Extractive Metallurgy, 99, 1990: C67-C70)
PERCOLATION BACTERIAL LEACHING OF RAJPURA DARIBA ORE IN SMALL COLUMNS

Chaudhury, G.R.; Sukla, L.B.; Das, R.P.; Sharma, R.S.; Bhanawat, S.C. (Scandinavian Journal Of Metallurgy, 19(6), 1990: 269-272)

Bacteria Fe2(SO4)3 percolation leaching was carried out in 12 kg containing columns. Initially the crushed ore was washed with H2SO4 in order to remove acid-consuming gangue minerals. Optimum conditions were established ...
DEPOSIT MORPHOLOGY AND CEMENTATION OF CADMIUM, COBALT AND NICKEL ON PURE ZINC IN AMMONIACAL MEDIUM

Bhattacharya, I.N.; Chaudhury, G.R. (Scandinavian Journal Of Metallurgy, 19(6), 1990: 265-268)

Cadmium, cobalt, and nickel cementation was carried out in ammoniacal medium using zinc disc. The rate of cementation of cadmium was observed to increase with increase of angular velocity of the zinc disc. In the presence ...
OXIDATIVE AMMONIA LEACHING OF PURE ZINC-SULFIDE IN THE PRESENCE OF LEAD COMPOUNDS

Ghosh, M.K.; Anand, S.; Das, R.P. (Metallurgical Transactions B-Process Metallurgy, 21(2), 1990: 402-404)
THE EFFECT OF CO2+, CU2+, FE2+ AND FE3+ DURING ELECTROWINNING OF NICKEL

Gogia, S.K.; Das, S.C. (Journal Of Applied Electrochemistry, 21(1), 1991: 64-72)

The effects of the impurities Co2+, Cu2+, Fe2+, Fe3+ on the current efficiency, physical appearance, purity, crystallographic orientation and surface morphology of the deposit and on nickel deposition polarization behaviour ...
X-RAY-EMISSION STUDIES ON THE (LA1-XBAX)2CUO4+/-Y SYSTEM

Acharya, B.S.; Rajeev; Muralidhar, J. (X-Ray Spectrometry, 19(3), 1990: 105-111)

Now showing items 3511-3520 of 3828

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