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Petro - Theses: Recent submissions

Now showing items 241-260 of 1415

Methane adsorption by activated carbons: comparison among coconut-, palm-, and bituminous coal based activated carbons

Wasa Sunthonsuriyawong (Chulalongkorn University, 2013)

Consumption of natural gas as a vehicular fuel has continuously increased in Thailand. Compressed natural gas (CNG) is natural gas which is compressed and stored under high pressure ~3,600 psi. To increase the travel ...
Hydrogen production from oxidative steam reforming of methanol over Au/CeO2-ZrO2 catalysts

Warapun Nakaranuwattana (Chulalongkorn University, 2013)

Hydrogen production by oxidative steam reforming of methanol (OSRM) was investigated over Au/CeO₂-ZrO₂ catalysts prepared by a deposition-precipitation (DP) technique. Pure supports (CeO₂ and ZrO₂) and mixed supports ...
Simulation of waterflooding, carbon dioxide flooding and water-alternating-carbon dioxide in heavy oil reservoir: comparative evaluation

Wantanee Teerasukakul (Chulalongkorn University, 2013)

A statistical review of world energy sources has demonstrated that the global oil production is not enough for current global oil consumption. Accordingly, this problem leads to the consideration of unconventional energy ...
Synthesis and property study of Ni-based cathod for IT-SOFCs

Thitirat Inprasit (Chulalongkorn University, 2014)

This thesis focuses on improvements of cathode materials for IT-SOFCs through an investigation of new synthesis route and new materials with A and B site substitution on Ni-based perovskite structure. The work was divided ...
Polydiphenylamine/Zeolite Y composites and electrical conductivity response toward halogenated hydrocarbons

Tharaporn Permpool (Chulalongkorn University, 2014)

Composites of polydiphenylamine (D-PDPA) and zeolite Y with H¯ as the cation (YH) was fabricated to be used as a sensing material towards halogenated solvents which are toxic towards human and environment and have been ...
Development of magnetic chitosan nanoparticles

Sutima Chattrabhuti (Chulalongkorn University, 2013)

The present work focuses on preparing the magnetic nanoparticles and chitin- chitosan hybrids materials via secondary forces and covalent bond in water-based system. In the first part, the hybridization via physical ...
Software integration of life cycle assessment and economic analysis for process evaluation

Sawitree Kalakul (Chulalongkorn University, 2013)

Creating a sustainable future offers challenges to engineers to develop chemical process designs that are not only technically and economically feasible but also environmental friendly. Life cycle assessment (LCA) is a ...
The study of silk sericin-clay aerogel structure

Saowanee Likitamporn (Chulalongkorn University, 2013)

Clay aerogel is light weight, low density and high porosity material produced from bentonite via freeze-drying technique which the morphology is suitable for several biotechnological applications including 3D scaffold. In ...
Polythiophene/carrageenan hydrogel as drug release matrix under electric field

Sanita Pairatwachapun (Chulalongkorn University, 2013)

Development of the conductive polymer-hydrogel blend between polythiophene (PTh) doped with acetylsalicylic acid (ASA) and a carrageenan hydrogel for the transdermal drug delivery was investigated, in which the characteristic ...
Development of sulfonated poly(ether ketone ether sulfone) (S-PEKES) as proton exchange membrane (PEM) for using in direct methanol fuel cell (DMFC)

Sairung Changkhamchom (Chulalongkorn University, 2013)

Poly(ether ketone ether sulfone) (PEKES),was synthesized by nucleophilic aromatic substitution polycondensation between bisphenol S and 4,4'-difluoro-benzophenone (system A), and between bisphenol S and 4,4'-dichlorobenzophenone ...
Dissolution kinetics of mixed soap scums at different molar ratios of Ca and Mg in an amphoteric surfactant system with different chelating agents

Rumpapat Siripaisan (Chulalongkorn University, 2014)

Hard water generally contains divalent cations, especially calcium and magnesium ions, which have a typical molar ratio of 4:1. Soap or salt of fatty acid reacts with Ca and Mg ions, to form white precipitate known as soap ...
Synthesis and applications of M-MCM-48 (M = Ti, Cc, and Cr) from silatrane precursor

Rujirat Longloilert (Chulalongkorn University, 2013)

Hydrothermal synthesis of cubic MCM-48 was carried out using silatrane as a silica precursor and CTAB as a structure directing agent. The effects of synthesis parameters, viz. crystallization temperature, crystallization ...
Crystallization of chloronitrobenzenes with the presence of adsorbent: a phase diagram study

Rapeporn Thiensuwan (Chulalongkorn University, 2013)

A binary phase diagram of m- and p-chloronitrobenzene (CNB) was constructed to study the effects of feed composition on the crystallization. The results show that the feed composition below the eutectic composition resulted ...
Life cycle energy and environmental analysis of a model biorefinery in Thailand

Rachasak Chinnawornrungsee (Chulalongkorn University, 2013)

This study aims to evaluate life cycle energy and environmental impacts associated with the production of biofuel (bioethanol) and biopolymer (polylactic acid, PLA) by using sugarcane and cassava as feedstocks for a possible ...
Hydrogen and methane production from biodiesel wastewater by two-stage anaerobic sequencing batch reactor (ASBR) under mesophilic temperature

Pranee Tangkathitipong (Chulalongkorn University, 2014)

Simultaneous production of hydrogen and methane from biodiesel wastewater with added glycerine was investigated by using a two-stage anaerobic sequencing batch reactor (ASBR) system. A hydrogen reactor (4 L) and methane ...
The effect of ozone treatment on activated carbon for methane adsorption

Pradinun Seangnak (Chulalongkorn University, 2014)

The consumption of natural gas, having methane as a main component, has been increased in the transportation sector. Since the storage capacity for methane via compression so called compressed natural gas (CNG) in a tank ...
Electrospun fiber mats and hydrogels containing herbal substances for biomedical applications

Piyachat Chuysinuan (Chulalongkorn University, 2013)

New biomaterial effective for use as topical/transdermal patches or wound dressings containing herbal substances (gallic acid, caffeic acid, and Eupatorium adenophorum essential oil) were developed. In order to improve the ...
Supramolecular structures and molecular self-assembly under hydrogen bonded and/ or metal coordinated case studies: from benzoxazines to diacetylenes

Pimsai Tanphibal (Chulalongkorn University, 2014)

The present work focuses on molecular design and development of molecular self-assembly via hydrogen bond network and/ or metal coordination through the case studies on benzoxazines and diacetylenes. In the first part shows ...
Effect of organic diluents on separation of heat stable salts (HSS) generated during carbon dioxide absorption using amine solution

Panupat Suppaibulsuk (Chulalongkorn University, 2013)

Organic diluents, i.e. 2-ethyl-1-hexanol, 1-octanol, 1-heptanol, 1-hexanol, and 1-pentanol, were used in the liquid-liquid extraction of heat stable salts (HSSs) in a monoethanolamine (MEA) solution used in the carbon ...
Design and use of ionic liquids in separation processes for azeotropic mixtures

Worawit Peng-noo (Chulalongkorn University, 2015)

Separation of azeotrope and close-boiling mixtures is a challenge in several industries. Ionic liquids (ILs) have been recently determined as alternative entrainers in the extractive distillation (ED) owing to the flexibility ...

Now showing items 241-260 of 1415

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