In this research, the equilibrium and dynamic adsorption studies of CO2 upon MIL-101(Cr) metal–organic framework (MOF) as well its GNP hybrid composites, MIL-101(Cr)/GNP, were performed. First, composite samples synthesized by adding various amounts in an situ manner during preparation MIL-101(Cr). The prepared materials characterized through several physicochemical analyses, including powder X-ray diffraction (PXRD), nitrogen at 77.4 K, Fourier transfer infrared (FT-IR) spectroscopy,...

In this paper oxidation of the H2S into elemental sulfur over synthesized alumina-based nanocatalysts was physiochemically investigated and results compared with a commercial Claus catalyst. The wet chemical, co-precipitation spray pyrolysis techniques employed to synthesize several alumina nanostructures. Then, SEM, XRD ASAP analysis methods utilized characterize in order choose best nanocatalyst. andH2S contents determined through standard UOP techniques. Amongst these as-synthesized...

In this study, azithromycin (AZT) adsorbed on natural clinoptilolite (NC) modified by Triton X-100 (NC-Triton) and Tween 80 (NC-Tween) surfactants. The effect of pH, contact time, adsorbent dose, temperature the adsorption was investigated. For NC, Temkin isotherm for NC-Tween NC-Triton, Langmuir fitted experimental data well. maximum capacity value NC-Tween, NC-Triton 28.011, 36.764, 44.642 mg/g, respectively. Fixed-bed experiments were performed under different conditions to predict...

A mathematical model for a fixed bed radial flow catalytic reactor was developed dehydrogenation of heavy paraffins over Pt-Sn/Al2O3 catalyst. The included appropriate kinetic rate expressions the main reaction as well side reactions and catalyst deactivation. consisted set partial ordinary algebraic equations that were solved numerically to determine concentration various species along radius function time. Nelder-Mead optimization method used obtain optimum parameters. validity...

Abstract Nanofluids are utilized in cooling equipment such as heat exchangers and renewable energies solar cells transfer fluid. The techniques for nanofluid stability enhancement evaluations, zeta potential, electron microscopy, photographic sedimentation, reviewed well some recent achievements stabilization research on the parameters affecting thermal properties of nanofluids. Finally, applications nanofluids devices described. Increased transfer, reduced time size exchangers, finally...

Abstract Increased chromium usage in industrial applications as III and VI, include metal plating, steel alloys, leather processing, medical applications, dyeing operations, has resulted water pollution by Cr (VI) ions, which being toxic carcinogenic developed into significant environmental health problems. The purpose of this research is to remove ions from synthetic wastewater utilising modified sawdust an inexpensive adsorbent. Two samples were produced, one using sodium hydroxide...

Abstract Catalytic paraffin dehydrogenation for manufacturing olefins is considered to be one of the most significant production routes in petrochemical industries. A reactor kinetic model propane propylene a radial‐flow over Pt‐Sn/Al 2 O 3 as catalyst was investigated here. The showed that activity highly time dependent. In addition, component concentrations and temperature varied along radius owing occurring endothermic reaction. Moreover, similar trend noticed conversion selectivity, with...

Catalyst deactivation and its environmental consequences are believed to be an important issue seriously needed dealt with. In this study, a mathematical model of spherical bed along with the catalyst in long-term operation period for methanol synthesis was investigated. The inside space two spheres reactor configuration filled catalyst. materials outer surface inner hemisphere were understudied. equations solved at dynamic static levels via finite difference method. It revealed that,...

The transformer-oil based nanofluid suspensions were prepared by adding 0.05 to 0.80 wt% multi-wall carbon nanotubes (MWCNTs) functionalized with a –COOH group. Sodium dodecyl sulfate (SDS) was used stabilize the suspensions. resulting material as coolant in double pipe heat exchanger operated under co- and counter-current flow conditions. thermo–physical features such thermal conductivity, viscosity, density determined at various temperatures mass fractions. Then, pertinent semi-empirical...

In the present study, Cr (VI) ion removal from synthetic wastewater utilizing sawdust as a rather inexpensive adsorbent studied by batch adsorption technique. The physiochemical characterizations done through employing FTIR and BET analyses. Experiments performed at temperature range of 25-65 oC with 0.5-5 g/L dosage. Moreover, these conditions applied to separate concentrations 1-6 ppm in pH 3-10. parameters determined using both an A-Priori Langmuir heterogeneous surface displayed...

A pilot-scale bubble column contactor has been utilized for carbon dioxide chemisorption from simulated flue gas in the temperature range 30°C to 50°C. The influence of most important operating parameters investigated. total 25 experiments were designed using response surface methodology (RSM) and then carried out contact column. results revealed that liquid volume column, alkaline concentration, had a positive effect, while hold-up negative effect on CO 2 removal efficiency. statistical...

This study examined the performance of natural clinoptilolite (NC) modified with two surfactants Triton X-100 (NC-Triton) and Tween 80 (NC-Tween) on apramycin (APR) adsorption from wastewater in batch continues systems. The optimum pH, contact time, adsorbent dosage, temperature were achieved. findings revealed that sorption was best described using Langmuir isotherm compared to other isotherms. maximum capacity NC-Triton greater than NC NC-Tween. lumped method applied solve fixed-bed...