The furnace gas resulting from the electrothermal production of yellow phosphorus contains up to 95% CO, 2% O2, H2, and 0.3–4.0% impurities, including phosphine (PH3), (P4), hydrogen sulphide (H2S), which are characterized by flammability, explosion hazardousness, corrosiveness, high toxicity. presence toxic impurities does not allow use waste gases production, mainly composed valuable carbon m...

A survey on organisms able to use molecular hydrogen as electron donor in the energy-yielding process is presented. In the group of the aerobic hydrogen-oxidizing bacteria so far two types of hydrogenases have been encountered, a NAD-reducing, soluble enzyme (H2 : NAD oxidoreductase) and a membrane-bound enzyme unable to reduce pyridine nucleotides. With respect to the distribution of both type...

Attempting to associate waste treatment to the production of clean and renewable energy, this research sought to evaluate the biological production of hydrogen using wastewater from the cassava starch treatment industry, generated during the processes of extraction and purification of starch. This experiment was carried out in a continuous anaerobic reactor with a working volume of 3L, with bam...

The enzymatic interconversion involves a net transfer of hydrogen which migrates as a proton (1). In spite of an early reference (2) to the role and existence of this glycolytic enzyme within a variety of animal tissues, it apparently has not been prepared previously in a significantly purified state from any source. Fractions rich in this enzyme have been separated from rabbit muscle (3), and ...

This Perspective covers sustainable oxidation processes using doped cerias, ceria-supported catalysts and ceria-based mixed oxides. Firstly, we consider the general properties of ceria-based catalysts. We outline the advantages of the ceria redox cycle, and explain the dynamic behaviour of these catalysts in the presence of metal additives and dopants. We then review three types of catalytic ox...

The article proposes the improvement of adsorption and absorption plants for recovery naphtha vapors through use a sulfur compounds purification unit. This unit allows you to remove environmentally hazardous components from vapors, which adversely affect filters, without increasing temperature significant pressure drop gas-air mixture. relevance study is due fact that marine terminals are objec...

The novel and facile multi-stage method was used for the conversion of bamboo into nanocellulose single cell protein. Firstly, chips were treated with sodium hydroxide solution followed by hydrogen peroxide bleaching obtaining cellulose pulp a brightness 80% ISO. In second stage, obtained bleached cellulosic achieved dilute sulfuric acid filtration sugar solution, which than Candida utilis cult...

The Space Active Hydrogen-Maser (SAHM) can be used for the Very Long Baseline Interferometry Project to improve resolution of space astronomical telescope. standard frequency signals provided by SAHM have their stability dependent on flux effective H atoms. Therefore, a nickel (Ni) tube, one end closed, has been designed in this paper as hydrogen (H2) purification and control device. Mechanisms...

alkali and alkaline earth metals hydrogen sulfate catalyzed the one-pot three component condensation reactions of aldehydes, 1,3-dicarbonyl compounds and urea or thiourea under solvent-free conditions leading to 3,4-dihydropyrimidin-2(1h)-ones in high yields at 80 °c. our results showed that biginelli reaction not only is ph dependent, but the cation of catalyst plays an important role.