Trypan Blue, an azo dye, was decolorized using the self-immobilizing fungal biomass of Pycnoporus sanguineus. The extent and the rate of dye decolorization were directly proportional to the initial dye concentration (20–60 mg L) and the reaction temperature (25–45°C). Mass transfer within and outside the pellets did not limit dye degradation. The apparent kinetics of the decolorization reaction...

nickel hydroxide nanostructures were synthesized by a hydrothermal reaction. the effect of different precursors and surfactants on the morphology of nickel hydroxide nanostructures was investigated. nanostructures were characterized by x-ray diffraction, energy dispersive x-ray spectroscopy, scanning electron microscopy and fourier transform infrared  spectroscopy. the influence of ni(oh)2 nano...

Differential scanning calorimetry (DSC) is a powerful technique that measures the heat evolution from a sample under a controlled condition and studies the phase transformation, precipitation, and dissolution activities. In this work, we investigated the influence of admixed silicon and silicon carbide and the effect of different atmospheres on the heat flow properties and microstructure of ato...

Dehydrogenation of anhydrous methanol is of great importance, given its ubiquity as an intermediate for the production of a large number of industrial chemicals. Since dehydrogenation of methanol is an endothermic reaction, heterogeneous or homogeneous precious-metal-based catalysts and high temperatures are usually required for this reaction to proceed. Here we report the photochemical dehydro...

The effect of adding both Al2O3 and ZrO2 to limestone (CaCO3) enhance the cyclic stability reaction kinetics endothermic CO2 desorption exothermic absorption is investigated. formation CaZrO3 Ca-Al-O compounds, e.g. CA5Al6O14, evident, which enables a substantial >80% capacity retention over 50 calcination/carbonation cycles. additives enable fast where an 80% energy storage reached within 20–3...

Saccharopine dehydrogenase (SDH) is the last enzyme in the AAA pathway of l-lysine biosynthesis. On the basis of crystal structures of SDH, the whole catalytic cycle of SDH has been studied by using density functional theory (DFT) method. Calculation results indicate that hydride transfer is the rate-limiting step with an energy barrier of 25.02kcal/mol, and the overall catalytic reaction is ca...

Both solid to gas (CaSO< + SiO — CaSi03 + S02 and Si3N4 + 3C (diamond) —» and 3SiC -f 2 N^) can be shock-induced at ballistic velocities. Because of the endothermic nature of the gas-producing reactions, the extent of reactions observed are limited to interfaces. We found the above reactions proceed to a much less extent than calculation by equilibrium thermodynainic calculations. Reaction prod...

For the new process of effective utilization of energy, chemical recuperation of low-grade exhaust heat by steam reforming of dimethyl ether (DME) was proposed. Steam reforming of DME is an endothermic reaction as; DME + 3H2O + 122[kJ/mol] → 6H2 + 2CO2. If this reaction could be proceed by exhaust heat below 573 [K], those exhaust heat which is wasted to ambient would be recuperated as the fuel...

We introduce a new method for performing and miniaturizing many types of heterogeneous catalysis involving nanoparticles. The method makes use of the plasmon resonance present in nanoscale metal catalysts to provide the necessary heat of reaction when illuminated with a low-power laser. We demonstrate our approach by reforming a flowing, liquid mixture of ethanol and water over gold nanoparticl...