The effect of reaction temperature, syngas space velocity, and catalyst stability on Fischer-Tropsch was investigated using a fixed-bed microreactor. Cobalt Manganese bimetallic catalysts carbon nanotubes (CNT) support (Co-Mn/CNT) were synthesized via the strong electrostatic adsorption (SEA) method. For testing performance catalyst, Co-Mn/CNT with four different manganese percentages (0, 5, 10...

The Manganese (II), Cobalt (II) and Nickel (II) complexes of phenyl glycine-o-carboxylic acid were prepared and characterized by magnetic studies, molar conductance studies, thermal analysis and spectroscopic techniques (FTIR and UV). The IR spectral studies revealed that the phenyl glycine-ocarboxylic acid behaves as a bidentate ligand. Electronic spectral studies and magnetic studies suggest ...

This review provides an outline of the most noteworthy achievements in the area of C-N, C-O and C-P bond formation by hydroamination, hydroalkoxylation, hydrophosphination, hydrophosphonylation or hydrophosphinylation reaction on unactivated alkenes (including 1,2- and 1,3-dienes) promoted by first-row late transition metal catalytic systems based on manganese, iron, cobalt, nickel, copper and ...

Toxic trace metallic elements such as arsenic, beryllium, cadmium, chromium, cobalt, lead, manganese, mercury, nickel, and selenium are usually contained in coal in various forms and trace amounts. These metals will either stay in the ash or be vaporized during high temperature combustion. Portions of the vaporized metals may eventually be emitted from a combustion system in the form of metal f...

Plants have need for about 18 essential nutrients. Of these essential nutrients, several are classified as trace metals, namely: zinc, iron, manganese, copper, boron, molybdenum, cobalt, and nickel. In addition, other trace metals commonly exist in soil that can be taken up, such as arsenic, chromium, iodine, selenium, and others. Some of these elements are more or less inert in the plant and o...

The concentrations of chromium, nickel, copper, manganese, zinc, iron, cobalt and aluminum ions in drinking waters from eight sites of Tokat, Turkey, were determined by atomic absorption spectrometry. The values found the present work for the heavy metal contents of the drinking water samples of Tokat, Turkey were below the maximum tolerable limits set by the World Health Organisation (WHO) and...

Formation and dissolution of authigenic Fe and Mn (oxyhydr)oxides influence cycling of trace metals in oxic/suboxic surface sediments. We used the diffusive gradients in thin films technique (DGT) to estimate the association of cobalt with iron and manganese oxides. We compared Co, Fe and Mn maxima measured by DGT in the pore waters of fresh and aged marine sediment cores and estimated the Co/F...

The carcinogenic properties of selected metals and their compounds are reviewed to provide a useful reference for existing knowledge on relationships between physical and chemical forms, kinetics and carcinogenic potential and between epidemiology, bioassays, and short-term tests. Extensive consideration is given to arsenic, beryllium, cadmium, chromium, lead, and nickel. Other metals such as a...

Recent technological advancements are raising the demand for valuable and critical metals. In a quest to find new resources, cobalt-rich ferromanganese crust (CRFC) is considered as alternative since it contains various metals, including cobalt (Co), nickel (Ni), manganese (Mn). The aim of this work was investigate efficiency (1) enhanced gravity separation by Falcon concentrator (2) reverse fl...