Ni/CeO2–Al2O3 with bimodal porous structure and two different CeO2 concentrations (low: 5 wt% high: 15 wt%) were prepared by the refluxed co-precipitation method characterized N2 physisorption, XRD, TPR, H2-TPD, CO2-TPD. Catalysts tested in combined steam dry reforming of methane (CSDRM) at atmospheric pressure, 600°C–700 °C CH4: CO2: H2O = 1: 0.48: 0.8, order to prepare synthesis gas H2:CO rat...

This study presents the development of a method for washcoating Ni/boehmite gels, prepared by sol–gel process, onto surface commercial ceramic monolith. Indeed, cordierite monolith in honeycomb shape was used as substrate Ni/Al2O3 deposition. An experimental assembly made order to apply coating on surface. Different suspensions were with various viscosities, and multiple parameters tested withd...

Increasing uses of engineered nanoparticles (ENPs) in commercial products and industrial applications has eventually resulted to their releases into atmospheric, terrestrial, and aquatic environments. However, knowledge gaps in ENPs toxicity, fate, and behaviour currently limit our ability to quantify risk assessment of materials with nanoscale dimensions, and therefore, the extent of the resul...

THE following comments are directed to the sections (2) ‘‘revisit to the grain growth problems in alumina’’ and (3) grain growth without a liquid phase in the article of concern. The purpose of this comment is to challenge the authors’ assertions and refute the following arguments, namely, first that ‘‘MgO can be considered a very effective grain growth promoter in the sintering of alumina,’’ s...

Egyptian Petroleum Research Institute, Nasr City, Cairo, Egypt. Chemistry department, Faculty of Science, Taif University, KSA. _________________________________________________________________________________________ Nine alumina samples of various modification techniques were subjected to thermal analysis via thermogravimetric analysis (TGA) and differential thermal analysis (DTA), in order t...

tion of metals have been reported to cause reacBiocompatibility can be defined as the ability tions, which most typically manifest as hives, of a biomaterial to demonstrate host and material eczema, redness, and itching (6,9–11). Although response appropriate to its intended application little is known about the shortand long-term (1). The determination of biocompatibility has pharmacodynamics ...

CO2 methanation is a very promising technology for the production of alternative fuels with simultaneous use greenhouse gases. Therefore, intensive research carried out on optimization catalysts excellent properties operation in area low temperatures. Here, we present catalyst composed 19 wt % NiO supported alumina/calcium aluminate. The was modified V2O5 order to be suited extrusion and scale-...

in this study, multi wall carbon nanotubes (mwcnts) were synthesized by chemical vapor deposition (cvd) method using two different catalysts (fe nanoparticles) and (ni nanoparticles) with  two different substrates: quartz and alumina. acetylene gas was used as a carbon source and argon as a carrier gas at different temperatures and different times to study the effects of these parameters on cnt...