Development Of Zeolite-Based Catalysts For The Combustion Of VOCs In Air Stream.

Chromium was found to be the most active transition metal for Volatile Organic Compound (VOC) combustion

Reactive separation of organic mixtures using functionalized Zeolite Membranes.

Systematic investigation of acid functionalized silicalite-l (MFI type zeolite) membrane synthesis has been conducted in this project

Selective glycerol esterification over organomontmorillonite catalysts

Organomontmorillonites were synthesized by grafting cationic surfactants i.e quaternary ammonium compounds into the interlayer space and were characterized using XRD, FTIR and N2 adsorption/ desorption analysis. The organomontmorillonites were applied as catalyst for the esterification of glycerol (GL) with lauric acid (LA). The catalyst which had symmetrical onium salts (tetrabuthylammoniumbromide, TBAB) gave higher activity than that of unsymmetrical onium salts (cetyltrimethylammoniumbromide, CTAB). Over the TBAB-montmorillonite catalyst, glycerol monolaurate was obtained with a selectivity of about 80%, a lauric acid conversion of about 71% and a glycerol monolaurate yield of about 57%

Development Of Monolithic Catalysts For Storage And Reduction Of Nitrogen Oxide (Nox) In Diesel Engine Exhaust.

Pembangunan mangkin monolit bagi penstoran dan seterusnya penurunan NOx dalam gas ekzos injin diesel telah dikaji. Zeolit ZSM-5 telah digunakan sebagai sokongan berluas permukaan tinggi untuk disalut ke atas monolit seramik. The development of monolithic catalysts for the storage and subsequently reduction of• NOx in diesel engine exhaust gas was studied. ZSM-5 zeolite was used as the high surface area support to be washcoated onto ceramic monolith

High Performance Catalysts For Storage And Reduction Of NOx In Diesel Engine Exhaust.

Diesel engines offer fuel eficiency and reliability in its operation but they also cause many adverse environmental effects, especially due to the emission of nitrogen oxides (NOx) ana particulate matter in the form of soot

Development Of Supported Tio2 Photocatalyst Based Adsorbent For Photocatalytic Degradation Of Phenol.

The presence of harmful organic compounds such as phenols and their derivatives in water supplies and from industrial effluents is a topic of global concern. In recent years, it has received considerable attention as an alternative for treating industrial waste water

Removal Efficiency of Acid Red 18 Dye from Aqueous Solution Using Different Aluminium-Based Electrode Materials by Electrocoagulation Process

This work compares commercial aluminium electrode for use in the treatment of wastewater by electrocoagulation process against waste aluminium cans electrode. The applicability of the waste aluminium cans electrode was tested for decolorization of Acid Red 18 dye as a model pollutant. The batch electrocoagulation process using both types of electrode was conducted at a current density of 25 mA/cm2, a pH of 3, an initial concentration of 100 mg/L and 25 min of reaction time. The elemental composition and surface morphology of both electrode materials and the sludge produced were analyzed using SEM-EDX to establish the correlation between the properties and characteristics of both electrode materials with their dye removal performance. The results demonstrated that waste aluminium cans performed better than commercial aluminium electrode with a removal efficiency of 100% in 25 min of reaction time. This was due to the higher Al dissolution of waste aluminium cans electrode that contributed to the larger amount of Al3+ released into the solution to consequently form more flocs to remove the dye molecules. In conclusion, the proposed waste aluminium electrode was considered as efficient and cost-effective and had the potential to replace the conventional ones in treating colored industrial wastewater using electrocoagulation process

OPTIMIZATION OF THE SELECTIVE CATALYTIC REDUCTION OF NO IN DIESEL EXHAUST OVER CU-ZN/ZSM-5 CATALYST USING CENTRAL COMPOSITE DESIGN

The optimization of the operating conditions in nitric oxide (NO) selective catalytic reduction (SCR) process over Cu-Zn/ZSM-5 bimetallic catalyst using combined Response Surface Methodology (RSM) and Central Composite Design (CCD) is reported. A bimetallic catalyst containing 6 wt. % Cu and 8 wt. % Zn was prepared through a combined impregnation and ion-exchange process. The process conditions investigated were temperature (300 -400 ?C), NO concentration (900-2,000 ppm) and iso-butane (reductant) concentration (900 - 2,000 ppm). The weight hourly space velocity (WHSV) was fixed at 13,000 h-1. Cu-Zn/ZSM-5 catalyst proved its potential for the SCR process. Statistical analyses showed that the NO reduction was affected by all the operating conditions with the temperature as the most dominant one. Based on the experimental design, a second order mathematical model was successfully developed and satisfactory fitting to the experimental data was demonstrated. Interactions between variables were also analyzed at 99.99 % confidence level. The optimum conditions obtained were 624 ppm for the NO concentration, 2,440 ppm for the iso-butane concentration and 389 °C for the reaction temperature to give a corresponding NO reduction of  96.13 %