oxidative coupling of methane has been studied over (mn+a+w)/sio2 catalysts in a continuous–flow microreactor, where a represents an alkali ion of li, na, k or cs having different weight percents. the main aim of this study is to find the role of alkali ions in interaction between mn and w species with sio2 to make a proper structure for catalyzing oxidative coupling of methane (ocm) reaction. ...

Oxidative coupling of methane (OCM) is an exothermic reaction that results in the temperature rise towards latter part reactor. This study reports consequence OCM product distribution after O 2 depletion at high temperatures.

A pseudo-homogeneous model, considering the axial and radial heat mass transfer characteristics of an oxidative coupling methane (OCM) packed-bed catalytic reactor, was utilized to represent its thermal reaction performance in a wide range variation operating conditions investigated this research. This is another step towards distinguishing direct contribution reactions indirect reactor's struc...

ch4, c2h6 and c2h4 are the most important outlet gaseous of oxidative couple methane (ocm) reaction and this process is a new technology for conversion of natural gas to ethane and ethylene products. in this study, adsorption of ocm outlet hydrocarbons over 10x zeolite has been examined at equilibrium conditions. temperature and pressure are the most effective operational parameters in the batc...

Direct valorization of methane via oxidative coupling (OCM) is an encouraging alternative to conventional oil-based processes for the production light hydrocarbons (ethane and ethylene). Abundant, inexpensive simple oxides such as MgO La2O3 possess ability selectively activate methane. However, during OCM, selective conversion ethane following dehydrogenation ethylene are threatened by thermody...

In this study, we aimed to enhance the catalytic activity of perovskite catalysts and elucidate their behavior in oxidative coupling methane (OCM), using alkali-added LaAlO3 catalysts. We prepared LaAlO3_XY (X = Li, Na, K, Y mol %) applied them OCM reaction. The results showed that catalysts’ activities were promoted compared catalyst. reaction, ethane was first synthesized through dimerization...

Ethylene production via oxidative coupling of methane (OCM) represents an interesting route for natural gas upscaling, being the focus intensive research worldwide. Here, OCM developments are analysed in terms kinetic mechanisms and respective applications chemical reactor models, discussing current challenges directions further developments. Furthermore, some thermodynamic aspects reactions al...

The oxidative coupling of methane (OCM) performance over Na-W-Mn/SiO2 at elevated pressures has been simulated by adaptive neuro fuzzy inference system (ANFIS) using reaction data gathered in an isothermal fixed bed microreactor. In the designed neuro fuzzy models, three important parameters such as methane to oxygen ratio, gas hourly space velocity (GHSV), and reaction temperature were conside...

This work presents multi-scale approaches to investigate 3D printed structured Mn–Na–W/SiO2 catalysts used for the oxidative coupling of methane (OCM) reaction. The performance has been compared their conventional analogues, packed beds pellets and powder. physicochemical properties were investigated using scanning electron microscopy, nitrogen adsorption X-ray diffraction (XRD). Performance du...

Although neurons are normally unable to regenerate their axons after injury to the CNS, this situation can be partially reversed by activating the innate immune system. In a widely studied instance of this phenomenon, proinflammatory agents have been shown to cause retinal ganglion cells, the projection neurons of the eye, to regenerate lengthy axons through the injured optic nerve. However, th...