The effects of ultrasonic power, treatment time and holding on AZ80 magnesium melt purification by field were studied. results indicate that can accelerate the separation inclusions attain purification. When alloy is treated with power 80 W at 650 °C for 60 s 100 s, best achieved. Moreover, effect degassing AZ91 was also investigated. 150 90 hydrogen content efficiency are 9.6 cm3/100 g 50.5%, ...

Biofilms of natural anaerobic microbial consortia externally grown on Gas Diffusion Electrodes (GDL) in a bioreactor, were investigated within a MembraneElectrode-Assembly with respect to lifetime and electricity production upon variation of biodegradable materials with an oxygen demand of 1000mg/l as simulated waste water. A remarkable differentiation and plasticity of the films is observed, t...

The way to decarbonization will be characterized by the huge production of hydrogen through sustainable routes. Thus, basic is water electrolysis sustained renewable energy sources allowing for obtaining “green hydrogen”. present paper reviews main available technologies finalized production. We describe fundamental and problems related purification and/or desalinization before electrolysis. As...

background: new technologies using hazardous materials usually have certain risks. it is more serious when the technology is supposed to be applied in a large scale and become widely used by many people. the objective of this paper was to evaluate the risk of vapor cloud explosion in a hydrogen production process. methods: potential hazards were identified using the conventional hazard identifi...

The need of establishment biohydrogen purification techniques is due the fact that production will be completely transformed into industrial scale soon or later. For process development to commercially feasible, all involved, including should low cost, practical and efficient; particularly when technically challenging. In any case, carbon dioxide other gaseous impurities are usually evolved dur...

Room-temperature perovskite nanocrystal syntheses have previously lacked the size tunability attainable through high-temperature methods. Herein, we outline a scalable approach whereby nucleation and growth of CsPbBr3 nanocrystals (NCs) can be decoupled controlled at room temperature by utilizing different ligands. We employed octylphosphonic acid (OPA) ligands to regulate critical radius NC ra...

Bioenergy is a type of renewable energy made from biological sources including algae, trees, or waste from agriculture, wood processing, food materials, and municipalities. Currently, the uses of renewable fuels (bioethanol, biodiesel, biogas and hydrogen) are increased in the transport sector worldwide. From an environmental and resource-efficiency perspective biogas has several advantages in ...

Purification of high-quality few-walled carbon nanotubes (fWNTs) was developed by slow but selective oxidation in hydrogen peroxide (H(2)O(2)) at room temperature. The purity, nanotubes' structure, and thermal stability of purified fWNTs were characterized by transmission electron microscopy (TEM), Raman spectroscopy, and thermogravimetric analysis (TGA), respectively. The results showed that f...

A transition metal-free method for the cycloisomerization of propargylic amides to oxazoles was developed. The reaction utilizes in situ generated hydrogen chloride hexafluoroisopropanol (HFIP). With aid Design Experiments optimization a wide range substrates transformed into desired oxazoles. allows product formation without side reactions eliminating need extensive work-up and purification.