Current environmental problems have created the need to search for cleaner fuels. Hydrogen has been proposed as a clean fuel because its combustion by-product is water. Unfortunately, hydrogen is not readily available in pure form. It is obtained from steam reforming (CH4 +2H2O→4H2 +CO2) and dry reforming (CH4 +CO2→2CO+2H2) [1] and has to be separated from methane, carbon dioxide and smaller am...

Quantitative agreement with experimental data for adsorption of argon, krypton, and methane in high-silica zeolites is achieved with a molecular model, which (1) assumes pairwise additivity of intermolecular forces; (2) ignores partially concealed silicon atoms and lumps their dispersion energy with the oxygen atoms; (3) neglects energy induced by the weak electric field inside silicalite; (4) ...

Fig. 1: Silicalite-1 crystal, top: building scheme with 90° rotated subunits, bottom: picture of the x-z-plane in normal optical mode (transmission). 1. Introduction Adsorption of aromatic hydrocarbons in MFI zeolites has been intensively studied due to the importance of ZSM-5 and the aluminium-deficient analogue, Silicalite-1, in catalysis and separation. Applying different macroscopic techniq...

In this work, we present Grand Canonical Monte-Carlo simulation results for the adsorption of carbon vapour in the pores of various zeolites: AlPO4-5, silicalite and faujasite (in its siliceous form). The carbon-carbon interactions are described within the frame of a Tight Binding approach (fourth momentum’s method) while the carbon-zeolite interactions are modelled using a PN-TrAZ physisorptio...

A brief survey is given of the thermochemistry of a number of silicon-containing substances that are of interest in modern technology. Among those discussed are: silicalite (SiO2), silicon disulfide (SiS2), the crystalline and vitreous forms of silicon diselenide (SiSen), silicon sesquitelluride (Si2Te3), silicon nitride (Si3N4), and vanadium disilicide (VSi2).

The combination of advantages of using zeolites and gold nanoparticles were aimed to be used for the first time to improve the characteristic properties of ion selective field-effect transistor (ISFET)-based creatinine biosensors. The biosensors with covalently cross-linked creatinine deiminase using glutaraldehyde (GA) were used as a control group, and the effect of different types of zeolites...

• Silicalite-1 encapsulated Ni catalyst with improved stability for dry reforming of methane. Different synthesis protocols affect the structure catalysts. Fully prevents sintering and coking. The catalysts in methane (DRM) is a known issue. In this paper an encapsulation strategy has been employed to improve compared conventional impregnation methods. Herein, nickel nanoparticles silicalite-1 ...

Medium-pore (diameter ~ 6A) zeolites such as ZSM-5 and silicalite impregnated with Group VIII metals provide selective catalytic pathways for the conversion of synthesis gas to gasoline or olefins. Mössbauer and magnetic studies on these catalysts containing iron or iron plus cobalt are reported. The zeolites were impregnated with metal nitrate solutions, reduced, and carbided to yield showed F...

Ethanol is considered as a renewable transport fuels and demand expected to grow. In this work, trends related bio-ethanol production are described using Thailand an example. Developments on high-temperature fermentation membrane technologies also explained. This study focuses the application of membranes in ethanol recovery after fermentation. A preliminary simulation was performed compare dif...

The separation of saturated branched and linear alkanes may be investigated by selective adsorption on microporous organophilic MFI type zeolite. From the literature, adsorption equilibria of mixtures show a favourable selectivity for less branched alkanes [1]. However the separation process is significantly influenced by the transport properties. The knowledge of the transport coefficients of ...