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Petro - Theses: Recent submissions

Now showing items 401-420 of 1415

Sustainable process design of biofuel: bioethanol production from cassava rhizome

Saranya Mangnimit (Chulalongkorn University, 2013)

This study focused on the sustainable process design of bioethanol production from cassava rhizome using various tools, including process simulation, sustainability analysis, economic evaluation and life cycle assessment ...
Catalytic partial oxidation of methane over NiO/Ce0.75Zr0.25-xO2-based catalysts

Ratchaphon Sukkaeo (Chulalongkorn University, 2013)

NiO/CZO is known as a good catalyst that can catalyse catalytic partial oxidation of methane (CPOM) reaction. However, the catalytic deactivations caused by the sintering of nickel metal and carbon formation on catalyst ...
Enhancement of CO2 adsorption on activated carbon via surface functionalization

Promporn Ritmongkolpun (Chulalongkorn University, 2013)

The effect of different polyethyleneimine (PEI) molecular weights on CO₂ adsorption on activated carbon (AC) was investigated. The PEI loading was varied by different PEI solution concentrations from 1.0 to 5.0 g/L. CO₂ ...
Inducing unique polymeric morphology based on molecular assembly: model cases from thermoplastic elastomer SEBS and/or supramolecular benzoxazine

Wonchalerm Rungswang (Chulalongkorn University, 2011)

The present work focuses on inducing the polymer morphology via the molecular self-assembly approaches. In the first part, an existence of ordered-structure microdomains, nano-phase separation, of thermoplastic elastomers ...
Catalytic pyrolysis of waste tire over Rh, Ni and Co supported on KL zeolite and their bimetallic catalysts

Waleerat Pinket (Chulalongkorn University, 2011)

Taking advantages of bifunctional catalysts, the catalytic pyrolysis of waste tire has been investigated aiming to improve the quality and quantity of products. The combination of basic property in KL zeolite with the ...
The effect of chelating agent Type on equilibrium solubility of calcium and magnesium soap scum in different surfactant systems

Prariyada Theptat (Chulalongkorn University, 2013)

Soap scum can be removed by using an appropriate surfactant with a chelating agent. However, ethylenediaminetetraacetic acid (EDTA), one of the most widely used chelating agents has low biodegradability and is suspected ...
Validation and standardization of asphaltene deposition by capillary experiments

Varun Chuenmeechao (Chulalongkorn University, 2011)

Asphaltene deposition can occur during processing and production of crude oil and can cause severe problems for the oil industry. In this experiment, n-heptane was used as a precipitant to destabilize asphaltenes to force ...
Degradation and biological evaluation of immobilized-electrospun polycaprolactone for bone tissue engineering

Piyada Poomsurard (Chulalongkorn University, 2013)

Polymeric scaffolds for bone tissue engineering application have been produced and developed to mimic the native extracellular matrix (ECM). In this study, polycaprolactone (PCL), the promising biodegradable polymer candidate ...
Deoxygenation of beef fat for the production of hydrogenated biodiesel : effect of active metals

Thawesak Parawan (Chulalongkorn University, 2011)

The production of hydrogenated biodiesel through the catalytic deoxygenation of vegetable oil has been extensively studied; however, the study of animal fats as feedstock is still limited. The objective of this research ...
Modified SAPO-34 for dehydration of bio-ethanol to light olefins in comparison with KOH-trezted HZSM-5

Peerapong Wongwanichsin (Chulalongkorn University, 2013)

Light olefins (especially, ethylene and propylene) are primarily used for the production of petrochemicals. In recent years, with the shortage of petroleum, the high demands of light olefins, and the increase in the price ...
Transesterification of vegetable oil to biodisel using CaO-ZnO catalyst

Pathravut Klinklom (Chulalongkorn University, 2013)

CaO-ZnO catalysts (with various Ca:Zn atomic ratios of 1:5, 1:3, 1:1, and 3:1) was prepared by incipient-wetness impregnation (IWI) or co-precipitation (CP) method. The samples were evaluated to find the best CaO-ZnO ...
Correlation of outdoor exposure and accelerated weathering test for study of service lifetime of plastic cards

Thamrong Chansawang (Chulalongkorn University, 2011)

A number of commercial plastic card materials, such as polyvinyl chloride (unplasticized) (PVC), polycarbonate (PC) and polyethylene terephthalate glycol (PETG), are widely available for using as smart card body. Usually, ...
Deoxygenation of jatropha oil for the production of hydrogenated biodiesel : effect of active metals

Teeralak Tharawut (Chulalongkorn University, 2011)

Hydrogenated biodiesel is referred to as diesel-like hydrocarbons that do not contain oxygen in their molecules. Its properties are much better than those of typical biodiesel such as higher heating value, higher cetane ...
Modification of commercially available adsorbents for CO₂ selective adsorption

Tawpath Pichaichanlert (Chulalongkorn University, 2011)

To reduce the carbon dioxide emission into the atmosphere, adsorption is believed to be one of the most attractive methods for post-combustion treatment of flue gas. In this work, activated carbon was modified by ...
Preparation of copper-indium-tin mixed oxide (CuInSnO₄) nanofibers via sol-gel and electrospinning techniques

Tada Bintawihok (Chulalongkorn University, 2011)

Preparation of copper-indium-tin mixed oxide nanofibers (CuInSnO₄) via sol-gel and electrospinning methods at low temperature is the major research focus since the mixed metal oxides could help increasing the insertion of ...
Sulfonated poly(ether ether ketone) and sulfonated Poly(1,4-phenylene ether ether sulfone) membranes for vanadium redox flow battery

Suraluck Macksasitorn (Chulalongkorn University, 2011)

Nafion® is a currently used Proton Exchange Membrane (PEM) in Vanadium Redox Flow Batteries (VRB). It is an excellent proton conducting and fully hydrated membrane, but it has a very high cost. In order to reduce the cost ...
Hybrid cladding to enhance light intensity for plastic optical fiber

Supaporn Paiboon (Chulalongkorn University, 2011)

Plastic optical fiber (POF) has been used extensively in short-distance data communications applications. POF consists of a plastic core and plastic cladding. Fluoropolymer, polysiloxane and PMMA are usually used as a ...
Photocatalytic degradation of Azo Dye contaminant in Wastewater using mesoporous-assembled In₂O₃-TiO₂-mixed oxide photocatalysts

Siriluck Niyomkarn (Chulalongkorn University, 2011)

Am azo compound is an important class of synthetic dyes and is characterized by the presence of one or more azo group (-N=N-) linked between aromatic rings. The release of this coloring agent causes wastewater problems. ...
Surface modification of polycaprolactone membrane via aminolysis and protein-immobilization for promoting bone cell growth

Sirichanok Satianyanond (Chulalongkorn University, 2011)

In order to make polycaprolactone (PCL) more preferable for tissue engineering, the study aims to improve the cytocompatibility, hydrophilicity as well as cellular responsibility of PCL membrane by surface modification. ...
Methane steam reforming using Mn-promoted nickel/ceria-zirconia mixed oxide catalysts

Setthawut Thongkhong (Chulalongkorn University, 2011)

Methane team reforming (MSR) is a well-known process for converting natural gas into syngas, a mixture of H₂ and CO. Ni-based catalysts are typically employed in industry for this steam reforming reaction. However a major ...

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