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Fatigue Of Swollen Elastomers
Faculty of Engineering University of Malaya
The compatibility of the properties of elastomer with conventional diesel fuel has made it favourable in many engineering applications. However, due to global energy insecurity issues, there is an urgent need to find alternative renewable sources of energy as replacements to conventional diesel. In this respect, biodiesel appears to be a promising candidate. Hence, research into the compatibility and fatigue characteristics of elastomers exposed to biodiesel becomes essential. The present paper introduces the first attempt to investigate the effect of different solvents on the fatigue of swollen elastomers. The filled nitrile rubbers are immersed in the palm biodiesel and conventional …
Influence Of Biodiesel Blending On Physicochemical Properties And Importance Of Mathematical Model For Predicting The Properties Of Biodiesel Blend
Faculty of Engineering University of Malaya
The growing demand for green world serves as one of the most significant challenges of modernization. Requirements like largest usage of energy for modern society as well as demand for friendly milieu create a deep concern in field of research. Biofuels are placed at the peak of the research arena for their underlying benefits as mentioned by multiple researches. Out of a number of vegetable oils, only a few are used commercially for biodiesel production. Due to various limitations of edible oil, non-edible oils are becoming a profitable choice. Till today, very little percentage of biodiesel is used successfully in …
Effects Of Carbon Black And The Presence Of Static Mechanical Strain On The Swelling Of Elastomers In Solvent
Faculty of Engineering University of Malaya
The effect of carbon black on the mechanical properties of elastomers is of great interest, because the filler is one of principal ingredients for the manufacturing of rubber products. While fillers can be used to enhance the properties of elastomers, including stress-free swelling resistance in solvent, it is widely known that the introduction of fillers yields significant inelastic responses of elastomers under cyclic mechanical loading, such as stress-softening, hysteresis and permanent set. When a filled elastomer is under mechanical deformation, the filler acts as a strain amplifier in the rubber matrix. Since the matrix local strain has a profound effect …
Physicochemical Characterization And Thermal Behavior Of Biodiesel And Biodiesel–Diesel Blends Derived From Crude Moringa Peregrina Seed Oil
Faculty of Engineering University of Malaya
Moringaceae is a monogeneric family with a single genus i.e. Moringa. This family includes 13 species. All these species are known as medicinal, nutritional and water purification agents. This study reports, for the first time, on characterization of the biodiesel derived from crude Moringa peregrina seed oil and its blends with diesel. The crude oil was converted to biodiesel by the transesterification reaction, catalyzed by potassium hydroxide. High ester content (97.79%) was obtained. M. peregrina biodiesel exhibited high oxidative stability (24.48 h). Moreover, the major fuel properties of M. peregrina biodiesel conformed to the ASTM D6751 standards. However, kinematic viscosity …
Application Of A Novel Catalyst In The Esterification Of Mixed Industrial Palm Oil For Biodiesel Production
Faculty of Engineering University of Malaya
Mixed industrial palm oil (MIPO) is proposed in this study as a renewable and agro-industrial raw material to produce biodiesel fuel. MIPO was obtained by mixing of acidic crude palm oil with sludge palm oil. Due to the high level of free fatty acid (FFA) in MIPO (8.5 %), esterification is needed to remove the acidity to the minimum level before biodiesel production. This is the first time 1-propanesulphonic acid (1-PSA) has been introduced as a catalyst for the pretreatment of MIPO. Using optimum conditions, the FFA content was successfully reduced from 8.5 % to less than 1 %. The …
Progress, Prospect And Challenges In Glycerol Purification Process: A Review
Progress, Prospect And Challenges In Glycerol Purification Process: A Review
Faculty of Engineering University of Malaya
Glycerol surplus in recent decades due to global increase in biodiesel production has created a new form of challenge in terms of purification for crude glycerol. This review summarizes the progress of crude glycerol purification technologies using various techniques. Critical insights are given regarding the application of suitable techniques for crude glycerol purification which includes chemical pre-treatment, methanol removal, vacuum distillation, ion exchange, activated carbon and membrane separation technology. Extensive discussion is made in relation with stages and processes in the conventional, current and emerging glycerol purification technologies. Lastly, aspects concerning the challenges of glycerol utilization and purification are thoroughly …
A Review: Conversion Of Bioglycerol Into 1,3-Propanediol Via Biological And Chemical Method
A Review: Conversion Of Bioglycerol Into 1,3-Propanediol Via Biological And Chemical Method
Faculty of Engineering University of Malaya
Today, the price of glycerol has dramatically dropped due to its oversupply from biodiesel production as well as oleochemical industry. Thus, it is essential to develop processes to transform bioglycerol into commercially valued products which is important to ensure sustainability in the biodiesel and oleochemical industries. One possibility is to transform it in propanediols, which have numerous applications such as food additives, raw material in pharmaceutical and cosmetic industries. In this paper, methods of conversion of glycerol into 1,3-propanediol are reviewed and discussed in detail. (C) 2014 Elsevier Ltd. All rights reserved. Link to Full-Text Articles : http://www.sciencedirect.com/science/article/pii/S1364032114008582
Evaluation Of Combustion, Performance, And Emissions Of Optimum Palm-Coconut Blend In Turbocharged And Non-Turbocharged Conditions Of A Diesel Engine
Faculty of Engineering University of Malaya
Fossil fuel depletion, global warming with rapid changes in climate, and increases in oil prices have motivated scientists to search for alternative fuel. Biodiesel can be an effective solution despite some limitations, such as poor fuel properties and engine performance. From this perspective, experiments were carried out to improve fuel properties and engine performance by using a binary blend of palm and coconut biodiesel at an optimized ratio. MATLAB optimization tool was used to determine this blend ratio. A new biodiesel was developed and represented by PC (optimum blend of palm and coconut biodiesel). Engine performance and emission were tested …
Biogasoline: An Out-Of-The-Box Solution To The Food-For-Fuel And Land-Use Competitions
Biogasoline: An Out-Of-The-Box Solution To The Food-For-Fuel And Land-Use Competitions
Faculty of Engineering University of Malaya
Societal developments are hinged on the energy supplied by fossil fuels. However, the supply of these fuels is finite in the foreseeable future. This is aside the associated environmental degradation and economic sustainability of these fuels. These negative consequences and challenges spurred the search for sustainable energy sources such as biofuels. However, affordable feedstocks and efficient synthesis for renewable fuels remain indispensable and yet challenging line of research. Therefore, breakthroughs in plant biotechnology and mass production are essential prerequisites for ensuring the sustainability of biofuels as alternatives to petroleum-based energy. Conversely, public outcry concerning the food-for-fuel conflicts and land-use change …
Mechanistic Analysis Of Cavitation Assisted Transesterification On Biodiesel Characteristics
Mechanistic Analysis Of Cavitation Assisted Transesterification On Biodiesel Characteristics
Faculty of Engineering University of Malaya
The influence of sonoluminescence transesterification on biodiesel physicochemical properties was investigated and the results were compared to those of traditional mechanical stirring. This study was conducted to identify the mechanistic features of ultra sonication by coupling statistical analysis of the experiments into the simulation of cavitation bubble. Different combinations of operational variables were employed for alkali-catalysis transesterification of palm oil. The experimental results showed that transesterification with ultrasound irradiation could change the biodiesel density by about 0.3 kg/m(3); the viscosity by 0.12 mm(2)/s; the pour point by about 1-2 degrees C and the flash point by 5 degrees C compared …