DSpace Home
→
Faculty and Institute
→
Petroleum and Petrochemical College - Petro
→
Petro - Theses
→
Recent submissions

Petro - Theses: Recent submissions

Now showing items 861-880 of 1415

Shear-induced crystallization in poly (trimethylene terephthalate)

Phornphon Srimoaon (Chulalongkorn University, 2003)

In plastics processing, polymer melts are generally sheared (i.e., they undergo shear flow) which may or may not enhance crystallization rates depending on thefavored conformational state of polymer molecules in the crystals. ...
Improvement of natural rubber properties by modification of silica surface using a continuous admicellar polymerization system

Paranee Nontasorn (Chulalongkorn University, 2002)

Fillers such as silica are often added to rubber to improve performance in commercial applications. The use of silica in rubber compounds provides beneficial properties such as improved reinforcement. A major problem with ...
Construction and verification a temperature programmed oxidation unit

Panthila Yangpakool (Chulalongkorn University, 2003)

Temperature programmed oxidation (TPO) is a common technique which is used the coke or carbon deposited on spent catalysts. This method provides useful information obout carbon distribution and coke type on the catalyst ...
Selective adsorption of natural zeolite for controlled-release of fertilizer

Nitida Nakapreecha (Chulalongkorn University, 2003)

In this study, batch liquid adsorption of NH4+ and K+ ions on clinoptilolite was carried out to obtain equilibrium and kinetic data at room temperature. From the analysis of the kinetic data, conformity to the Elovich model ...
Effect of molecular orientation on permeability and optical grating for polymeric agricultural films

Nithikorn Singsat (Chulalongkorn University, 2003)

Blends of natural rubber (NR) with linear low-density polyethylene (LLDPE) were prepared by chill roll cast film extrusion. Theaddition of NR and epoxidzed natural rubber (ENR) to LLDPE significantly decreased the MFI of ...
Preparation and characterization of jute-and flax-reinforced starch-based composite foams

Nattakan Soykeabkaew (Chulalongkorn University, 2003)

Starch-based composite foams (SCFs) were succesfully prepared by baking starch-based batters incorporating either jute or flax fibers inside a hot mold. The effect of moisture content on the mechanical properties of SCFs ...
Development of polyaniline/zeolite composites as a CO/N2 sensor

Nataporn Densakulprasert (Chulalongkorn University, 2003)

Polyaniline (PANI) is one of the most popular conductive polymers used for sensor applications due to the ease of synthesis, and environmental and thermal stability. Zeolite with gas adsorptivity is utilized to composite ...
Synthesis of mesoporous cerium dioxide by the sol-gel process and rheological measurement in ceria gel

Morakot Rumruangwong (Chulalongkorn University, 2003)

Ceria is used as a catalyst as well as a catalyst support. To improve the quality of this material, the influence of sol-gel parameters on the final gel structure was explored. In this work porous cerium dioxide was ...
Oxidative removal of ethylene in a multistage plasma reactor in the presence of TiO2

Kanokwan Saktrakool (Chulalongkorn University, 2003)

A number of techniques for air pollutant removals are available such as adsorption, biofilaration and incineration. However, these techniques require further treatment and/or are energy-intensive leading to high treatment ...
Polymer nanocomposites as flame retardant : effect of filler types

Jirawadee Pipattanatornkul (Chulalongkorn University, 2003)

A new approach to address the ever-increasing demand for higher performance flame retrded products has recently focused on utilizing different inorganic additives (OC-MMT, silatrane and alumatrane). The metalatranes were ...
Preparation and characterization of chitosan-coated calcium alginate film

Jeerada Mahutthon (Chulalongkorn University, 2003)

The effects of cross-linking with calcium ion and chitosan coating on mechanical properties, swelling behavior and drug release characteristics of alginate films were studied. FTIR spectra of chitosan-coated calcium alginate ...
Influence of surlyn ionomer compatibilizer on phase morphology, crystallization behavior and thermal stability of PA6/surlyn /LDPE blends

Janya Trimongkol (Chulalongkorn University, 2003)

PA6/LDPE blends exhibit phase separation morphology so compatibilization is needed to improve the interfacial adhesion between the phases. In this work, blends of PA6 and LDPE were prepared using a Surlyn ionomer as a ...
Regeneration of Pt/KL catalysts utilized for n-octane aromatization

Dholporn Lertkijcharoenwong (Chulalongkorn University, 2003)

Aromatization is one of the most important petrochemical processes for aromatic production. Pt/KL catalyst prepard by Vapor Phase Impregnation method is known to be an effective catalyst for n-octane aromatization. However, ...
Recovery of polyelectrolyte from polyelectrolyte-enhanced ultrafiltration by precipitation process

Chalothorn Soponvuttikul (Chulalongkorn University, 2002)

The recovery of polyelectrolyte from polyelectrolyte-enhanced ultrafiltration(PEUF) for chromate removal was studied as equilibrium experiments in a laboratory scale and batch and continuous operations in a pilot scale ...
Oxidation of ethylene in a plasma environment

Boonyarat Harndumrongsak (Chulalongkorn University, 2002)

The oxidation of ethylene under plasma environment with a corona discharge was investigated in a wire and plate reactor with and without TiO2. The TiO2 coated on glass wool was used in this study. All the experiments were ...
Development of a neutron device to measure steam quality at a high pressure

Bhurisa Thitakamol (Chulalongkorn University, 2003)

Steam quality, measured as the void fraction in a two-phase, steam-water flow in an autoclave, was investigated by the fast neutron scattering technique. This technique based on the slowing-down of neutrons, resulting from ...
Advanced oxidation process for wastewater treatment

Apipong Chitvarodom (Chulalongkorn University, 2003)

Industrial wastewater treatment is important for removing pollutants before the wastewater is released into the environment. Advanced oxidantion process (AOP) based on the generation of highly radicals is an important ...
Preparation and characterization of hexanoyl chitosan/polycaprolactone blend films

Wimol Wongsin (Chulalongkorn University, 2002)

Hexanoyl chitosan (H-chitosan) was prepared and blended with polycaprolactone (PCL) at various blend compositions. Films of the blends were prepared by solution casting technique using chloroform as a solvent. Permeability ...
Extraction of a-chymotrypsin using sodium bis(2-ethylhexyl) phosphate(NaDEHP) reverse micellar system

Wassana Sooksomsin (Chulalongkorn University, 2002)

Recently, liquid-liquid extraction using reverse micelles has been proposed as an effective method to separate, concentrate, and purify proteins from a complex biomedium such as fermentation broth with scaled-up bility. ...
Atomic force microscope studies of ultra thin silica film formation from adsolubilized tetra-N-butoxysilane polymerization on mica

Wasan Saphanuchart (Chulalongkorn University, 2002)

Admicellar polymerization is a proven method of assembling ultr thin films, which play important roles in functionally specific surface catings, catalysis, and semiconductors. However, only the formation of organic polymers ...

Now showing items 861-880 of 1415

Search DSpace

Advanced Search

Browse

All of DSpace
This Collection

Recently added

Petro - Theses: Recent submissions

Search DSpace

Browse

All of DSpace

This Collection

My Account