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

Petro - Theses: Recent submissions

Now showing items 941-960 of 1415

Energy cost minimization and data reconciliation

Nopphon Rongsayamanon (Chulalongkorn University, 2004)

Gas separation plant was studied for energy analysis because it consumed a high energy. This plant consists of three main distillation coumns (demethanizer, deethanizer and depropanizer) and ten heat exchangers. First of ...
Crystallization kinetics of poly(trimethylene terephthalate) : macroscopic and microscopic studies

Nattapol Apiwanthanakorn (Chulalongkorn University, 2004)

Macroscopic crystallization kinetics was investigated using differential scanning calorimetry (DSC). Non-isothermal crystallization of poly(trimethylene terephthalate) (PTT) was considered in this study. The kinetics of ...
Surface modification and characterization of polystyrene formed via admicellar polymerization on precipitated silica : water soluble vs insoluble initiator and application of RAFT agent via admicellar polymerization

Hom, Nang Sam (Chulalongkorn University, 2004)

Since the late 1980's, researchers have been investigating uses of polymerization carried out in the adsorbed surfactant aggregates on substrates. This process, known as admicellar polymerization (AP), has been proven ...
Synthesis of lead zirconate titanate(PZT) via the sol-gel process of titanium/zirconium/lead glycolate and lead acetate trihydrate

Kittikhun Pakdeewanishsukho (Chulalongkorn University, 2004)

Lead Zirconate Titanate (PZT) powder was prepared from metal glycolate of Pb, Zr and Ti having the composition of the morphotropic phase boundary (Zr:Ti = 52:48) via either sol-gel processing or microwave technique, using ...
Removal of sulfur compounds from transportation by adsorption

Jittapong Chansa (Chulalongkorn University, 2004)

As the conventional hydrodesulfurization process (HDS) is considered no longer practical or economical for the production of ultra low sulfur fuels, adsorption on solid adsorbent has gained increasing interest from researchers ...
Catalytic pyrolysis of polypropylene waste films into valuable upstream petrochemical products

Janthima Supphanam (Chulalongkorn University, 2004)

Plastic bags are greatly involved in modern Thai lifestyle, especially in food and goods packaging, creating environmental concerns on waste treatment due to their low biodegrability. A large number of plastic bags with ...
Synthesis of novel metal alkoxides and preparation of porous oxide materials from the synthesized metal alkoxides via sol-gel technolog

Bussarin Ksapabutr (Chulalongkorn University, 2004)

The synthesis of novel metal alkoxides and preparation of porous oxide materials using the corresponding metal alkoxide precursors have been investigated. Examples of materials synthesized on account of the versatility of ...
Polypyrole/molecular sieve 13X composites to CH4, CO2, CO, and SO2 : effects of cation type and cation concentration

Boonchoy Soontornworajit (Chulalongkorn University, 2004)

Electrical conductivity sensitivity of polypyrrole(Ppy)/molecular sieve 13X composites exposed to CH4, CO2, CO, and SO2 was investigated. Composites were prepared by dry mixing. Effects of molecular sieve 13X concentration, ...
Blends of low-density polyethylene with nylon compatibilized with sodium-neutralized carboxylate ionomers

Atchara Lahor (Chulalongkorn University, 2004)

An ethylene-methacrylic acid copolymer partially neutralized with sodium (Na-EMAA), was successfully applied to compatibilize nylon6 (Ny6) and low-density polyethylene (LDPE) blends. The phase morphology and thermal behavior ...
Chitineous gel via epoxy group incoration and its hydroxyapatite formation

Jutatip Fungangwanwong (Chulalongkorn University, 2003)

The preparation of epoxy-chitosan gel with hydroxyapatite is reported. Initially, the reactivity and solubility of chitosan is improved by conjugating phthaloyl groups with chitosan chains. The epoxy group is introduced ...
Refinery operations planning under uncertainty

Arkadej Pongsakdi (Chulalongkorn University, 2004)

Nowadays, the petroleum refinery business is very competitive resulted in a low economic margin. In this situation, refinery planning becomes a very important tool as it can bring all potential opportunities to push the ...
Homogeneous and heterogeneous catalytic production of biodiesel from palm kernel oil and coconut oil

Exconde, Abigail Alvarez Malaluan (Chulalongkorn University, 2003)

Nowadays, fatty acid methyl ester or biodiesel, prepared from transesterification of vegetable oil is believed to be a viable alternative for diesel fuel. Homogeneous basic catalysts such as NaOH and KOH are commonly used ...
Catalyzed esterification reaction by lipase encapsulated in sodium bis(2-ethylhexyl) phosphate(NaDEHP) reverse micelles

Pichasiree Thientaworn (Chulalongkorn University, 2003)

The use of reverse micelle as a reaction medium for reactions catalyzed by enzymes has received increasing attention in recent years since it can enhance the activity of the enzyme and its interaction with substrate. In ...
Development of a methanol fuel processor for PEMFC applications

Verakit Anupapwisetkul (Chulalongkorn University, 2010)

The preferential oxidation (PROX) of CO in the presence of hydrogen is regarded as one of the most effective methods for reducing CO levels to a desired value in polymer electrolyte membrane fuel cell (PEMFCs) application. ...
Catalytic pyrolysis of waste tire over Y-based catalysts: synergistic effect between Pd-Pt

Thirapat Latthikawiboon (Chulalongkorn University, 2010)

The waste tire pyrolysis is the promising way to solve the problems of insufficient fuel resources. Its products consist of gas and oil with insufficient qualities for direct uses in engines. Using the bimetallic, Pd and ...
Increasing rate of hydrogen permeation through pipes and vessel walls

Supawadee Ratanaphand (Chulalongkorn University, 2010)

Hydrogen can enter in metal during corrosion processes or other industrial processes. Atomic hydrogen can diffuse through the metallic lattice because of its small size. Its interaction car result In various types of ...
Crystallization and adsorption separation of m-chloronitrobenzene from its isomers

Sudarat Pattanapaiboonkul (Chulalongkorn University, 2010)

Crystallization has been used for the separation of chloronitrobenzene or CNBs, which are isomeric (o-, m- and p-CNB) and important intermediates in chemical productions. The effect of feed composition on the m- and p-CNB ...
Dehydroxylation of glycerol to propylene glycol over copper-zinc oxide catalysts : effects of catalyst perparation and regeneration

Suchart Panyad (Chulalongkorn University, 2010)

Glycerol is a major by-product from vegetable oil transesterification to biodiesel. The increase in biodiesel production results in the marketed surplus of glycerol. The catalytic dehydroxylation of glycerol to propylene ...
Investigation of barium sulfate deposition by capillary flow and thermal effect on silica precipitation in acidic solution

Satinee Yindee (Chulalongkorn University, 2010)

In the oil industry, scale composed of barium sulfate (BaSO₄) is one of the most troublesome and expensive problems found in the oil production process due to its relative low solubility compared with other typical scale ...
Adsolubilization of organic compounds by silica modified with mixed conventional surfactant and EO/PO-based block copolymer

Rachaya Hanyanuwat (Chulalongkorn University, 2010)

The concern over wastewater problems has led to the development of various treatment modalities. Adsorption and adsolubilization have been found to be useful in application for the removal of organic compounds from wastewater. ...

Now showing items 941-960 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