Ali Abdul Rahman

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The influence of superficial gas velocity and the addition of alcohols with respect to oxygen mass transfer (KLa), and gas hold-up (ɛg) in circulation loop bubble column using three aqueous solutions of 10% concentration methanol, ethanol and isopropanol as liquids were investigated. The column was constructed using a plexiglass tube of inner diameter of(More)
The effect of gas velocity, liquid-phase properties, solid-particle concentration and the static liquid height on gas hold-up (ɛg) and mass transfer coefficient (KLa) were studied in a three phase internal loop airlift bubble column (ILBC) (the ratio of the draft tube to column diameter equal to 0.5). Air was used as a gas phase. Water and seven aqueous(More)
We report polarization-sensitive solar-blind metal-semiconductor-metal UV photodetectors based on (112̅0) a-plane AlGaN. The epilayer shows anisotropic optical properties confirmed by polarization-resolved transmission and photocurrent measurements, in good agreement with band structure calculations.
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