Adsorptive removal of phenol from aqueous solutions on activated carbon prepared from tobacco residues: Equilibrium, kinetics and thermodynamics

Adsorption of heavy metal ions from aqueous solutions by bio-char, a by-product of pyrolysis

Adsorption of lead(II) ions from aqueous solutions by activated carbon prepared from biomass plant material of Euphorbia rigida

Adsorption of polluting substances on activated carbons prepared from rice husk and sugarcane bagasse

The adsorption of resorcinol from water using multi-walled carbon nanotubes

Characterization and phenols sorptive properties of carbons activated by sulphuric acid

Chemical and physical properties of Al1−xFexPO4 alloys: Part I. Thermal stability, magnetic properties and related electrical conductivity

A coprecipitation method for the preparation of Al1-xFexPO4 catalysts with x (or Fe/P ratio) = 0.0, 0.2, 0.4, 0.6 and 0.8 was developed. The samples were calcined at temperatures within the range 200-800°C. The surface structure, cumulative acidity, textural properties, and the catalytic activity and selectivity of the prepared samples towards isopropanol and cyclohexane conversion were studied using different techniques. The results showed that the freshly calcined samples consisted of an amorphous phase, a quartz-type and a tridymite-type phase depending on the calcination temperature. The total surface acidity decreased with FePO4 content or calcination temperature. Variations in the Fe/P ratio and the calcination temperature led to changes in both the surface area and total pore volume of the Al1-xFexPO4 samples. Increases in the Fe/P ratio and increasing calcination temperature led to increases in the pore radius. The catalytic activity and selectivity were significantly affected as the structures of...

https://journals.sagepub.com/doi/pdf/10.1260/026361702321104246

Chemical and Physical Properties of the Al1-xFexPO4 System Prepared by the Coprecipitation Method. II. Surface Acidity, Textural Properties and Catalytic Activity

AlPO4 and Al2O3–AlPO4 mixed catalysts of different composition (Al/P > 1) were prepared and calcined in the temperature range 350–650°C. Such catalysts were characterized by DTA and X-ray diffraction methods, and by nitrogen adsorption studies at −196°C. Their acidity was determined using a calorimetric titration method while their catalytic activity towards the dehydration of isopropanol was determined using a pulse microcatalytic technique. The data obtained from XRD studies showed that pure AlPO4 when calcined at 650°C had a rather low crystallinity with its crystalline structure (which is of the α-cristobalite type) being characterized by poorly developed peaks. However, significant changes in the texture, surface acidity and catalytic activity were observed as a result of changing the chemical composition of the solid, with the surface area, total pore volume and surface acidity generally increasing with increasing alumina content. Sintering commenced above 550°C leading to a decrease in the surface ...

https://journals.sagepub.com/doi/pdf/10.1260/026361702320360559

F.Sh. Mohamed

Papers

Characterization and phenols sorptive properties of carbons activated by sulphuric acid

Chemical and physical properties of Al1−xFexPO4 alloys: Part I. Thermal stability, magnetic properties and related electrical conductivity

Chemical and Physical Properties of the Al1-xFexPO4 System Prepared by the Coprecipitation Method. II. Surface Acidity, Textural Properties and Catalytic Activity

Effect of Chemical Composition on the Structure and Catalytic Behaviour of AlPO4 and Al2O3–AlPO4 Mixed Catalysts