One-part geopolymers were synthesized from two different silica materials (a silica-rich residue from chlorosilane production and a commercial microsilica) and sodium aluminate at three different SiO2/Al2O3 ratios and a nominal water/solids ratio of 0.5. The degree of reaction of the silica in the cured geopolymers (i.e. the fraction of silica dissolved to form aluminosilicates and minor produc...

Aluminosilicate and ZSM-5 catalyst were synthesized from local materials, low-grade Indonesian kaolin. High quartz impurities content in the kaolin was successfully reduced by consecutive treatment process including washing, centrifugation, Fe3+ treatment. All showed mesoporous structure with pore diameter around 3.5 nm. The catalytic activity investigated acetalization of 3,4-dimethoxybenzalde...

Ni functionalized metal organic frameworks (MOF) are promising heterogeneous ethene dimerization catalysts. Activities comparable to or higher than Ni-aluminosilicates have been reported in literature. However, unlike the Ni-aluminosilicates, those Ni-MOFs require a large excess of co-catalyst initiate process and some catalysts generate polymers which lead catalyst deactivation. Herein, we rep...

The contamination of foods and feeds is a significant problem in worldwide. Mycotoxins are secondary metabolites of fungi, particularly by many species of Aspergillus, Fusarium, Penicillium, Claviceps and Alternaria in many agricultural crops, especially in cereals and most oilseeds. Aflatoxins, ochratoxins, trichothecenes, zearelenone and fumonisins are the mycotoxins of greatest agro-economic...

Introduction During catalytic hydrogenation of vegetable oils, some of the naturally occurring cis double bonds are isomerized to trans fatty acids (TFA). High levels of trans fats in the diet are linked to higher occurrence of coronary health diseases [1]. However, all trans fatty acids are not harmful, some conjugated linoleic acid (CLA) isomers are reported to have anticarcinogenic, -atherog...

Fischer-Tropsch synthesis: Four types of bi-functional catalysts with cobalt nanoparticles supported on meso- or microporous silicates aluminosilicates are investigated regarding the obtained CO2 and CH4 selectivity under low-temperature reaction conditions. In situ x-ray absorption spectroscopy results industrially relevant conditions reveal that strong cobalt-support interactions oxidized spe...