Experiments in pulse-injected flow reactors show that gas-phase pyrolysis of alcohols makes a transition from dehydrogenation dominance for mono-alcohols to dehydration and fragmentation for tested diols and a triol. These dehydration and dehydrogenation reactions are proposed to occur by unimolecular and bimolecular pericyclic reactions, as has been used to explain glucose and cellulose pyroly...

The dehydration of bioalcohols is considered one the major factors contributing to cost biofuel production. In this study, liquid phase separation water from methanol and ethanol in a siliceous MFI pervaporation membrane was studied by performing concentration gradient driven molecular dynamic (CGD-MD) simulations. CGD-MD simulations work imposing higher feed side lower permeate membrane. This ...

Calcium sulfate is an important construction material. More than 1600 million square meters of interior surfaces are covered with plasterboards in Europe each year. Plasterboard manufactured by transforming mined or recycled gypsum (CaSO4 × 2 H2O) to bassanite ½H2O) a time- and energy-consuming heating process. A fast sustainable way produce solvent-assisted milling, thereby eliminating the nee...

A series of metal oxides were deposited on the surface of different oxide supports to study the surface oxide support interactions. The dehydrated Raman spectra of the supported metal oxide catalysts reveal the presence and structure of the supported metal oxide phases. The same surface metal oxide species were found on the different oxide supports for each of the supported metal oxide systems....

BACKGROUND Methanol to dimethyl ether (MTD) is considered one of the main routes for the production of clean bio-fuel. The effect of copper loading on the catalytic performance of different phases of alumina that formed by calcination at two different temperatures was examined for the dehydration of methanol to dimethyl ether (DME). RESULTS A range of Cu loadings of (1, 2, 4, 6, 10 and 15% Cu...

Embryonic X-ray amorphous semi-formed MFI-type zeolite units mixed with the Cu–Zn–Al catalyst have been used for direct synthesis of dimethyl ether (DME) from syngas. The hybrid embryonic (EZ) particle size 5 nm has demonstrated superior performance in terms activity, selectivity, and stability compared to crystalline ZSM-5 counterpart aluminosilicate material. FTIR pyridine adsorption uncovere...

The molecular structures and surface chemistry of mixed metal oxide heteropolyoxo vanadium tungstate (H(3+x)PW(12-x)V(x)O(40) with x = 0, 1, 2, and 3) Keggin nanoparticles (NPs), where vanadium is incorporated into the primary Keggin structure, and supported VO(x) on tungstophosphoric acid (TPA, H(3)PW(12)O(40)), where vanadium is present on the surface of the Keggin unit, were investigated wit...

The performance of the single-step and sequential-steps catalytic CO2-hydrogenation to DiMethyl Ether (DME) was systematically analyzed. CuO–ZnO model-catalysts for methanol were synthesized via different methods namely co-precipitation, sequential precipitation precipitation-impregnation precursors. Moreover, co-precipitation co-impregnation applied establish bifunctional structures composed o...