King Saud University

Ahmed Yacine Badjah Hadj Ahmed

Zeid Abdullah ALOthman

Mohamed Ali Ouladsmane

Taieb Aouak

Wafa Nazal Alharbi

Abderahmane Abdullah Alwarthan

Khadejah Dhafer Yahya Otaif

Khalid Mohammed Nasser Alotaibi

Rakan Tariq Alfayez

Mohammed Mousa Alshehri

Ahmad Aqel Ifseisi

Zeid Abdullah Al-Othman

Abdulrahman Abdullah Al-Warthan

Ahmad Aqel

A system for producing hydrogen gas includes a first container, a microwave emitter configured to direct a microwave to the first container, a steam condenser, a second container and an effluent conduit. The first container includes a first container body configured to hold a quantity of water and aluminum particles inside. The steam condenser connects the first container with a first end of the effluent conduit. A second end of the effluent conduit can be inserted in the second container. The microwave emitter can be operated to direct a microwave to the water and aluminum particles (when the water aluminum particles are present inside of the first container). The radiation of the water and aluminum particles with the microwave will cause hydrogen gas to dissociate from the water. The hydrogen gas will travel through the steam condenser and the effluent conduit to be stored in the second container.

System and method for producing hydrogen gas by using microwave radiation

A method of using a system includes injecting a liquid mixture from a reservoir to an upper cell; stirring the liquid mixture in the upper cell using a stirrer; separating a first organic constituent from the liquid mixture by absorbing the first organic constituent of the liquid mixture at a first peripheral section of a membrane thereby causing a retentate comprising a second organic constituent and a solvent to reside in the upper cell; desorbing the first organic constituent of the liquid mixture at a second peripheral section of the membrane to obtain a first organic constituent permeate vapor; receiving the first organic constituent permeate vapor in a third feed line of a lower cell; receiving the retentate in a second feed line of the upper cell; and sending the retentate to the reservoir via the second feed line.

Selective extraction of thiophene from thiophene/n-heptane using a poly(vinyl acetate)/water membrane system

The method of metered switching for a high-performance liquid chromatography (HPLC) sample injector is a method of controlled switching for a HPLC sample injector to control the amount of the sample being transferred to the HPLC separation column. In a load mode of the HPLC sample injector, a sample to be tested is injected therein until a sample loop is filled. The HPLC sample injector is switched into an injection mode such that a pressurized mobile phase pushes the sample through the sample loop and out of an outlet port. The HPLC sample injector is then switched back into the load mode at a selected time corresponding to a desired volume of the sample to be dispensed from the outlet port. The time-dependent correspondence between a flow rate of the pressurized mobile phase and the desired volume of the sample for the sample loop is already known.

Method of metered switching for a high-performance liquid chromatography sample injector

The method of making a wall-coated open tubular capillary column with a poly benzyl stationary phase is a method of preparing a capillary column for gas chromatography. An inner wall of a fused silica capillary column is cleaned and then rinsed with a sodium hydroxide solution. The fused silica capillary column is flushed with isopropanol to form a pre-treated capillary column, and the pre-treated capillary column is loaded with a mixture of phenyl tri-methoxy silane and alcohol. The loaded pre-treated capillary column is heated to form a treated capillary column, which is then washed. A thin layer of a poly benzyl stationary phase is then coated on the inner wall through condensation polymerization of benzyl chloride monomers with a Lewis acid catalyst in a non-polar solvent.

Method of making a wall-coated open tubular capillary column with a poly benzyl stationary phase

A method of forming a stationary phase of a capillary column for gas chromatography includes in situ growth of a metal-organic framework on an inner surface of the capillary column. The capillary column may include fused silica on an inner surface thereof and can be treated to provide functional groups capable of forming covalent bonds with a difunctional organic linker of the metal-organic framework. Epitaxial growth of the metal organic framework can occur directly on the inner surface of the capillary tube to a desired uniform thickness, controllable by concentration of metal organic framework precursors.

Method of preparing a capillary column including in situ formation of a metal-organic framework stationary phase

The extraction of benzene from benzene/cyclohexane mixture described herein is a process that removes benzene from a benzene/cyclohexane mixture with high selectivity, resulting in an enriched cyclohexane content in the retentate. The process involves adding an aqueous solution of poloxamer 188 to the benzene/cyclohexane mixture and waiting for the mixture to partition into an organic layer above an aqueous layer. Benzene, being more polar than cyclohexane, is selectively drawn into the aqueous layer. Benzene is then removed from the aqueous layer by pervaporation through a composite PDMS (polydimethylsiloxane)/polystyrene membrane. Cyclohexane is recovered from the retentate by drawing off the organic layer of the retentate by any known method. About 97% of benzene has been removed from a 50-50 wt % mixture by pervaporation in the static mode, and about 99% by pervaporation in the continuous mode.

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Riyadh, Saudi Arabia

Ahmed Yacine Badjah Hadj Ahmed