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Petro - Theses: Recent submissions

Now showing items 321-340 of 1415

Biodiesel production from palm oil using KOH/bentonite catalysts

Chesta Jindavat (Chulalongkorn University, 2011)

The transesterification was carried out using KOH loaded on bentonite as a heterogeneous catalyst. The effects of reaction parameters, such as reaction time, % K loading, reaction temperature, molar ratio of methanol to ...
Development of industrialized Ru/MCM-48 and Ru/HMOR-based catalysts for waste tire pyrolysis

Chaiyaporn Witpathomwong (Chulalongkorn University, 2011)

The demands of light olefins are continuously increased because each of them is one of the Seven Sisters, which are the major raw materials of petrochemical industry. The light olefins can be produced by the oxidative ...
A systematic study on benzimidazole derivatives: investigation of hydrogen bond, packing structure, and molecular mobility related to proton transfer in anhydrous system of polymer electrolyte membrane fuel cell

Autchara Pangon (Chulalongkorn University, 2011)

งานวิจัยนี้มุ่งเน้นให้เห็นชัดเจนถึงการส่งผ่านโปรตอนในโมเลกุลเฮเทอโรไซเคิลภายใต้ระบบที่ไม่ใช้น้ำของสารต้นแบบและพอลิเมอร์ต้นแบบของเบนซิมิดาโซล โดยวิธีออกแบบและสังเคราะห์โมเลกุลอย่างง่าย จำนวนหมู่เบนซิมิดาโซลภายใต้ ...
Catalytic tar removal by Ni supported on CeO₂-ZrO₂ based catalysts

Asawin Bampenrat (Chulalongkorn University, 2011)
Surfactant bilayer adsorption and MPS admicellar polymerization on natural rubber latex particles

Salinla Sriyapai (Chulalongkorn University, 2013)

The adsorption isotherms of four surfactants (CPC, DBSA, C7BzO and NP30) were considered. From the results revealed that the adsorption isotherms of CPC, DBSA and C7BzO presented the forming of bilayer adsorption which ...
Investigation of asphaltene deposition in flowing condition

Pantid Phichphimok (Chulalongkorn University, 2015)

Asphaltenes are one of the most problematic compounds in crude oil. They have high tendency to aggregate and deposit on the surface of pipeline and production equipment. In this work, a packed-bed of large spheres flow-loop ...
Sulfonated poly(2,6-Dimethyl-1,4-phenylene oxide)composite membrane filled by zeolite for direct methanol fuel cell

Piyanat Kotaphan (Chulalongkorn University, 2013)

Composite membranes were fabricated as a proton exchange membrane (PEM) for direct methanol fuel cell (DMFC). Sulfonated poly(2,6-dimethyl-1,4-phenylene oxide) (SPPO) membrane was prepared by solvent casting. SPPO was ...
Development of heterogeneous catalyst for biodiesel production

Pisitpong Intarapong (Chulalongkorn University, 2013)

Biodiesel has been considered as an important alternative energy for diesel engines. Most of biodiesel is produced via transesterification of vegetable oils and alcohols using a homogeneous basic catalyst to accelerate ...
PolyHIPE loading with hydroxyapatite for biomedical applications

Patthira Aornmuang (Chulalongkorn University, 2013)

The polymerization of high internal phase emulsions (HIPEs) is a techniqueto create highly porous material, polyHIPE polymer. The pore size of polyHIPE porous foams can be changed from the sub-micron to micron range by ...
Evaluation of monomeric sugar yield from various grasses grown in thailand as biofuel feedstock by two-stage microwave/chemical pretreatment process

Patomwat Tatijaren (Chulalongkorn University, 2013)

Cogon grass (Imperata cylindrica), Guinea grass (Panicum maximum), Kans grass (Saccharum spontaneum), Giant reed (Arundo donax), and Mission grass (Pennisetum polystachyon) were locally collected to test as bioethanol ...
Reactive compatibilization of poly(buthylene terephthalate)/high density polyethylene by maleic anhydride grafted high density polyethylene

Panu Lukkanapisest (Chulalongkorn University, 2013)

Polymer blending is a technique used to fabricate a new material that has different physical properties. A common problem in the blending process is that mixing non polar and polar polymers together leads to unstable phase ...
Commercial preparation of nanoclay incorporated wood plastic composites

Nutcha Prasertnasung (Chulalongkorn University, 2013)

In this study, polypropylene (PP), one of the most widely used polyolefins, was used to make a hybrid material of wood flour and nanoclay. The hybridization was carried out by melt compounding and followed by injection ...
Indium-containing ZSM-5 catalyst for methylation of benzene: effect of silica/alumina rations and reaction conditions

Nichapat Niyomthong (Chulalongkorn University, 2013)

Catalytic conversion of methane to higher hydrocarbons is an attractive route for the utilization of methane. One possible way to convert methane is the direct methylation of benzene by methane in the presence of a catalyst. ...
Effects of microaeration on hydrogen and methane production from cassava wastewater using a two-stage UASB system

Pairin Tuntiwichayanon (Chulalongkorn University, 2015)

In this work, a two stage up flow anaerobic sludge blanket (UASB) system was used to produce separately hydrogen and methane from cassava wastewater under mesophilic temperature (37 ℃) with a recycle ratio of 1:1 (final ...
Effect of amines on high internal phase emulsion adsorbents for carbon dioxide adsorption

Narit Athipongarporn (Chulalongkorn University, 2013)

High internal phase emulsion polymers (PolyHIPE) with amines, i.e. hexylamine and 1,3-diaminopropane were prepared. The oil-in-water emulsion system was obtained by mixing divinyIbenzene (DVB), vinylbenzylchloride (VBC) ...
Techno-economic evaluation of CO2 utilization processes : hydrogenation, Bi-and Tri-reforming of CO2 into methanol production

Nguyen Bui Huu Tuan (Chulalongkorn University, 2015)

More efforts to capture CO2 are being encouraged in order to minimize its concentration in air. However, the CO2 capture cost is still quite high and is a major problem in advancing more sustainable processes. One viable ...
Dissolution of soap scums synthesized from stearic acid and commercial soap

Kingkan Punta (Chulalongkorn University, 2015)

Soap scum is generated from long chain fatty acids of soap reacting with divalent cation, especially calcium and magnesium ion in natural hard water. It is precipitate on the surface of sink and bathtubs as a white stain. ...
Development of poly(p-phenylene)/crosslinked poly(3-caprolactone) as electroactive shape memory composite

Napat Charoonrak (Chulalongkorn University, 2013)

Electroactive shape memory composites are smart materials that change their shapes and recover their initial shapes in the presence of an applied electric field. In this work, the focus is on fabricating an electroactive ...
Deacetylation of chitin hydrogel by using solution plasma

Maneekarn Kantakanun (Chulalongkorn University, 2013)

Deacetylation is a chemical reaction used for converting chitin into chitosan. Since native chitin has low reactivity to the deacetylation reaction, chitin hydrogel, an amorphous form of chitin, was applied in this study. ...
Design and optimization of cryogenic process

Juthathip Thasai (Chulalongkorn University, 2015)

Refrigeration system is widely used in the industry, especially in cryogenic process. The main problem of refrigeration system is high energy consumption from shaft work resulting in high operation cost. To minimize the ...

Now showing items 321-340 of 1415

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