The physical and chemical properties of raw bio-oil, two oxidized bio-oils, and hydrotreated bio-oil were compared before and after catalytic hydrodeoxygenation using sulfided CoMo/γ-Al2O3 catalyst. Following continuous hydrodeoxygenation, the organic liquid products from treated bio-oils and raw bio-oil were compared for higher heating value, oxygen content, water content, and viscosity. In ad...

The performance of two phenol-formaldehyde resin-based activated carbons prepared in our laboratory, as potential adsorbents for precombustion CO2 capture has been evaluated under static (adsorption isotherms) and dynamic (adsorption-desorption cycles conducted in a fixed bed) conditions. Most of the literature on CO2 capture with solid sorbents is based on equilibrium CO2 adsorption capacities...

W. Brüchle, GSI, Darmstadt, Germany Chromatographic techniques are among the most effective chemical methods to separate and characterize closely related chemical substances or ions. More than half a century ago the main theoretical fundaments for these methods were developed; even a Nobel Price was awarded to Martin and Synge [1] for their theoretical and practical methodic developments. There...

A stirred-flow technique has been widely used to study the rate of ion adsorption on clays and soils. However, no mathematical analysis of chemical kinetics combined with mass transport has been used to derive rate coefficients for ion exchange phenomena. Accordingly, the objectives of this study were to: (i) develop a mathematical model of the kinetics of an elementary cation-exchange reaction...

A recent Letter [1] presents a study of adsorptiondesorption of perfluoromethylcyclohexane (PFMC) in an array of cylindrical pores in Al2O3. A hysteretic transition is observed. It is argued that its width (0.4 K) is 5 times smaller than the prediction by Cohan [2] (1.9 K) and that the data agree better with the Cole-Saam theory (CST) [3,4], which includes interactions with the pore walls. By c...

Volatilization of agricultural chemicals is one process whereby chemicals may enter into parts of the environment where they were not intended. Starch encapsulation of pesticides has been proposed as a way of modifying pesticide behavior in the soil environment. This study was conducted to assess how starch encapsulation and temperature affect volatilization of atrazine [6.chloro-N-ethyI-N’-(l-...

The main goal of this work was to study the hydrogen interactions with carbon nanostructures (graphene grown on Pt(111), and carbon nanotube (CNT)/Pt composites) in lieu towards finding answers related to two bigger questions – (a) hydrogen storage possibility in carbon nanostructures and (b) band gap opening in graphene (for device applications). X-ray spectroscopy was used as the main experim...

Volatilization of agricultural chemicals is one process whereby chemicals may enter into parts of the environment where they were not intended. Starch encapsulation of pesticides has been proposed as a way of modifying pesticide behavior in the soil environment. This study was conducted to assess how starch encapsulation and temperature affect volatilization of atrazine [6.chloro-N-ethyI-N’-(l-...