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7th Brunei International Conference on engineering and Technology 2018 (BICET 2018)

作者： D. M. Reddy Prasad Valerian Victor Kong D. Sathiyamoorthy Ahmad Z. Sulaiman R. Senthilkumar N. W. Yahya Petroleum and Chemical Engineering Programme area Faculty of Engineering Universiti Teknologi Brunei Tungku Highway Gadong BE1410 Brunei Darussalam Faculty of Chemical and Natural Resources Engineering Universiti Malaysia Pahang Lebuhraya Tun Razak 26300 Kuantan Pahang Faculty of Chemical and Natural Resources Engineering Universiti Malaysia Pahang Lebuhraya Tun Razak 26300 Kuantan Pahang College of Applied Sciences PO Box no. 135 Postal code 311 Sohar Sultanate of Oman

Fossil-based fuels are main sources for atmospheric pollution and global warming. Biodiesel is the most attractive alternative fuel to the fast depletion of fossil oil. Jatropha oil is renewable non edible oil with high percentage of free fatty acids (FFAs). It generally forms soap in the presence of alkali catalyst during the production of biodiesel. In order to overcome this problem, we attempted to produce biodiesel through two-step transesterification. In the first step 1 wt % sulfuric acid (H 2 SO 4 ) in oil was used for transesterification of Jatropha oil at 60°C in the mixture of one part of acid free oil with six parts of methanol. The first step was carried out to reduce the FFAs content to a minimal value. In the second step Sodium Hydroxide (NaOH) catalyzed esterification was carried out at 60°C to convert FFA free Jatropha oil to biodiesel. Sonication at 20 KHz was used in both the steps. Sonication could help achieving intensive mixing of the reaction mixture during transesterification process. The conversion of biodiesel was estimated through hydrogen nuclear magnetic resonance. We could achieve in the first step 99% reduction of FFA followed by 92% conversion of resultant Jatropha oil to biodiesel in 45 min. The reaction rate constants k for transesterification were estimated at different temperatures and the rate equation was derived. We conclude that the two step transesterification is likely to be a most promising environment friendly method to convert Jatropha to biodiesel.

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Microbial production of poly (3-hydroxybutyrate) (PHB) from rubber seed oil using Cupriavidus necator H16

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IOP Conference Series: Earth and Environmental Science 2019年第1期398卷

作者： D.M. Reddy Prasad Rajashekhar Pendyala R Senthilkumar Mohammad Hazwan Bin Azri Petroleum and Chemical Engineering Programme area Faculty of Engineering Universiti Teknologi Brunei Tungku Highway Gadong BE1410 Brunei Darussalam. Chemical Engineering Department Universiti Teknologi PETRONAS 32610 Seri Iskandar Perak Darul Ridzuan Malaysia. College of Applied Sciences PO Box no. 135 Postal code 311 Sohar Sultanate of Oman

Rubber seed oil is inedible plant oil that is a potential replacement for the traditional organic building blocks used in PHB biosynthesis. Herein we describe the biosynthesis of PHB by Cupriavidus necator H16 grown in media with rubber seed oil and urea serving as carbon and nitrogen sources, respectively. The method was optimized over a temperature range of 30-50 °C for batch culture studies. A maximized PHB concentration of 15.4 g/L, and dry well weight of 19.2 g/L was obtained using 20 g/L of rubber seed oil at 30°C. Experimental results were used to generate a logistic curve, and the Luedeking-Piret model was implemented to predict the specific growth rate of C. necator at 0.1898 1/h. The estimated rate constants were in good agreement with experimental values. This study demonstrated that rubber seed oil is a viable alternative to conventional carbon sources for the production of PHB using *** H16.

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Synthesis of nano emulsion from waste cooking oil for enhanced oil recovery applications

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IOP Conference Series: Materials Science and engineering 2019年第1期606卷

作者： M I I M Noor A Islam S Saalah C C Ken S M Anisuzzaman Z Kamin Chemical Engineering Programme Faculty of Engineering Universiti Malaysia Sabah Jalan UMS 88400 Kota Kinabalu Sabah Malaysia Department of Petroleum and Mining Engineering Faculty of Engineering and Technology Jessore University of Science and Technology Bangladesh Energy Research Unit Faculty of Engineering Universiti Malaysia Sabah Jalan UMS 88400 Kota Kinabalu Sabah Malaysia

Enhanced oil recovery (EOR) is a tertiary method to extract potential oil in a matured well. Emulsion, which is one EOR method has properties which enable it to recover oil remains in reservoir rocks of the matured well. Nano sized emulsion or nano emulsion able to recover trapped oil, by capillary force in fine pores of the reservoir rock. Nano emulsion reduces the oil-water interfacial tension and therefore changes the wettability of the reservoir rock. However, the nano emulsion is uneconomical and unstable. Therefore, this work aimed to produce nano emulsions by using low cost waste cooking oil, Tween 80 and Span 80. Ultra-sonication was used to reduce the size of the emulsion. The concentration of surfactant, power of ultra-sonication and time of sonication were varied to study the stability of the oil-in-water and size of the emulsion using the Malvern Zetasizer. The nano emulsion was then tested on a crude oil soak meligan formation sand rock to test the performance of the nano emulsion. The result show values of zeta potential and droplet size were - 15.3 mV and 262.1 *** respectively. The emulsion droplet sizes were about 500 nm with milky white appearance. The nano emulsion shows positive results as 63.89 % crude oil displaced from the soaked meligan formation sand rock. As a conclusion, the nano emulsion produced from waste cooking oil can potentially be used for EOR.

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Rapid adsorption of toxic Pb(Ⅱ) ions from aqueous solution using multiwall carbon nanotubes synthesized by microwave chemical vapor deposition technique

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Journal of Environmental Sciences 2016年第7期28卷 143-155页

作者： Nabisab Mujawar Mubarak Jaya Narayan Sahu Ezzat Chan Abdullah Natesan Subramanian Jayakumar Department of Chemical Engineering Faculty of Engineering and Science Curtin University Sarawak Department of Chemical Engineering Faculty of Engineering University of Malaya Petroleum and Chemical Engineering Programme Area Faculty of Engineering Institut Teknologi Brunei Malaysia–Japan International Institute of Technology Universiti Teknologi Malaysia Jalan Semarak

Multiwall carbon nanotubes（MWCNTs） were synthesized using a tubular microwave chemical vapor deposition technique, using acetylene and hydrogen as the precursor gases and ferrocene as catalyst. The novel MWCNT samples were tested for their performance in terms of Pb（Ⅱ）binding. The synthesized MWCNT samples were characterized using Fourier Transform Infrared（FT-IR）, Brunauer, Emmett and Teller（BET）, Field Emission Scanning Electron Microscopy（FESEM） analysis, and the adsorption of Pb（Ⅱ） was studied as a function of p H,initial Pb（Ⅱ） concentration, MWCNT dosage, agitation speed, and adsorption time, and process parameters were optimized. The adsorption data followed both Freundlich and Langmuir isotherms. On the basis of the Langmuir model, Qmaxwas calculated to be 104.2 mg/g for the microwave-synthesized MWCNTs. In order to investigate the dynamic behavior of MWCNTs as an adsorbent, the kinetic data were modeled using pseudo first-order and pseudo second-order equations. Different thermodynamic parameters, viz., ΔH0, ΔS0and ΔG0were evaluated and it was found that the adsorption was feasible, spontaneous and endothermic in nature. The statistical analysis revealed that the optimum conditions for the highest removal（99.9%） of Pb（Ⅱ） are at p H 5, MWCNT dosage 0.1 g, agitation speed 160 r/min and time of 22.5 min with the initial concentration of 10 mg/L. Our results proved that microwave-synthesized MWCNTs can be used as an effective Pb（Ⅱ） adsorbent due to their high adsorption capacity as well as the short adsorption time needed to achieve equilibrium.

关键词： Microwave Heavy metal Wastewater treatment Adsorption MWCNTs Lead

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Optimization of protein yields in water extracts of Jackiopsis ornata roots by response surface methodology using microwave assisted extraction (MAE)

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AIP Conference Proceedings 2019年第1期2068卷

作者： H. E. Abugabr Elhag A. Naila A. Ajit A. Z. Sulaiman W. F. W. Ishak Badhrulhisham Abd Aziz Reddy Prasad 1Faculty of Chemical and Natural Resources Engineering Universiti Malaysia Pahang Malaysia (UMP) Lebuhraya Tun Razak 26300 Gambang Pahang Dural Makmur Malaysia 2The Maldives National University Central administration Rahdhebai Hingun Machangolhi Male Maldives 3Faculty of Bio-Engineering and Technology Universiti Malaysia Kelantan Jeli Campus Locked Bag No. 100 17600 Jeli Kelantan Malaysia 4Petroleum and Chemical Engineering Programme Faculty of Engineering Tungku Highway Gadong BE1410 Negara Brunei Darussalam Universiti Teknologi Brunei Brunei

Optimization of protein yields in water extracts that were obtained from Jackiopsis ornata roots by Microwave assisted extraction (MAE) was established by a Circumscribed Central Composite Design (CCCD). MAE proved to be an optimum choice for the protein extraction. The highest yield (20.425±108) was obtained with the parameters liquid to solid ratio (S= 30:1), particle size (P=0.022±0.002mm (radius), temperature (T= 65°C); microwave power (W= 300W) and extraction time (t= 20 minutes). Statistical analysis illustrated the adequacy of the generated full quadratic equation with ad high values of the coefficient of determination (R2), adjusted coefficient of determination R2adj and predicted coefficient p of determination R2pred The p value of the Lack of Fit test illustrated the adequacy of the model. The optimization conditions of extracting the protein was predicted to be with the parameters S: 26, P: 0.0284; T: 65 °C; P: 303 W and t: 20 min. The high efficiency of MAE to obtain J. ornata protein extract encouraged further application on pilot and industrial scale.

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Statistical modeling and optimization of a multistage gas-solid fluidized bed for removing pollutants from flue gases

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Particuology 2015年第5期13卷 72-81页

作者： K.Mahalik Y.K.Mohanty K.C.Biswal G.K.Roy J.N.Sahu Department of Chemical Engineering Gandhi Institute of Engineering and Technology Department of Chemical Engineering National Institute of Technology Department of Chemical Engineering Faculty of EngineeringUniversity of Malaya Petroleum and Chemical Engineering Programme Area Faculty of EngineeringInstitut Teknologi Brunei(A Technology University)

The present paper describes the statistical modeling and optimization of a multistage gas-solid fluidized bed reactor for the control of hazardous pollutants in flue gas. In this work, we study the hydrodynamics of the pressure drop and minimum fluidization velocity. The hydrodynamics of a three-stage fluidized bed are then compared with those for a single-stage unit. It is observed that the total pressure drop over all stages of the three-stage fluidized bed is less than that of an identical single-stage system. However, the minimum fluidization velocity is higher in the single-stage unit. Under identical conditions, the minimum fluidization velocity is highest in the top bed, and lowest in the bottom bed. This signifies that the behavior of solids changes from a well-mixed flow to a plug-flow, with intermediate behavior in the middle bed.

关键词： Fluidized bed Multi-stage Pressure drop Minimum fluidization velocity Optimization

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Column performance of carbon nanotube packed bed for methylene blue and orange red dye removal from waste water

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IOP Conference Series: Materials Science and engineering 2017年第1期206卷

作者： G K Gill N M Mubarak S Nizamuddin H S Al-Salim J N Sahu Department of Chemical and Petroleum Engineering Faculty of Engineering UCSI University Kuala Lumpur-56000 Malaysia Department of Chemical Engineering Faculty of Engineering and Science Curtin University 98009 Sarawak Malaysia Department of Chemical engineering Scholl of engineering RMIT University Melbourne Australia 3001 Petroleum and Chemical Engineering Programme Area Faculty of Engineering Institut Teknologi Brunei Tungku Gadong P.O. Box 2909 Brunei Darussalam

Environmental issues have always been a major issue among human kind for the past decades. As the time passes by, the technology field has grown and has helped a lot in order to reduce these environmental issues. Industries such as metal plating facilities, mining operations and batteries production are a few examples that involves in the environmental issues. Carbon nanotube is proven to possess excellent adsorption capacity for the removal of methylene blue and orange red dyes. The effect of process parameters such as pH and contact time was investigated The results revealed that optimized conditions for the highest removal for methylene blue (MB) (97%) and orange red (94%) are at pH 10, CNTs dosage of 1 grams, and 15 minutes for each dyes removal respectively. The equilibrium adsorption data obtained was best fit to Freundlich model, while kinetic data can be characterized by the pseudo second-order rate kinetics.

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Recent advances in chemical modifications of graphene

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Nano Research 2015年第4期8卷 1039-1074页

作者： Sunil P. Lonkar Yogesh S. Deshmukh Ahmed A. Abdala Department of Chemical Engineering The Petroleum Institute PO Box 2533 Abu Dhabi UAE Faculty of Humanities and Sciences Maastricht Science Programme Maastricht University Minderbroedersberg 4-6 6211LK Maastricht the Netherlands

Graphene has attracted the interest of chemists, physicists, and materials scientists due to its extraordinary structural, mechanical, and electronic properties. While pristine graphene is desirable for applications that require a high electrical conductivity, many other applications require modified or functionalized forms of graphene, such as graphene oxide, reduced graphene, or other functionalized forms. Structurally modifying graphene through chemical functionalization reveals the numerous possibilities for tuning its structure; several chemical and physical functionalization methods have been explored to improve the stabilization and modification of graphene. In this review, we report recent progress towards the chemical modification of graphene, including both covalent and noncovalent methods, for use in various applications.

关键词： graphene graphene oxide functionalization covalent non-covalent applications

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CO2 Adsorption-breakthrough Study on Activated Carbon derived from Renewable Oil Palm Empty Fruit Bunch

CO2 Adsorption-breakthrough Study on Activated Carbon derive...

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8th International Conference on Researches in engineering, Technology and Sciences (ICRETS)

作者： N.S.Nasri Husna M.Zain Hamza D.Usman Zulkifli Abd.Majid Zalilah Sharer Nurul Ania Sazali Nur Liyana Anirman Sustainability Waste-To-Wealth Unit UTM-MPRC Oil and Gas InstituteEnergy Research AllianceUniversiti Teknologi Malaysia Department of Renewable Energy Engineering Faculty of Petroleum and Renewable Energy EngineeringUniversiti Teknologi Malaysia Department of Chemical Engineering Faculty of Chemical EngineeringUniversiti Teknologi Malaysia Chemical Engineering Programme Abubakar Tafawa Balewa University

The emissions of CO gas lead to the severe environmental pollution especially global warming's *** order to minimize the negative impacts from the emission of CO gas,it is necessary to filter and separate the *** paper was aimed to synthesize activated carbon from agricultural waste material（EFB） by using basic agent（KOH） and CO activation and to determine the adsorption rate and breakthrough of the CO gas on the different type treatment of activated ***-char was produced via carbonization process and then activated through chemical treatment and CO *** physical characterization of the samples were investigated by using nitrogen adsorption and scanning electron microscopy（SEM） and Fourier transform infrared spectroscopy（FT-IR） which was used to study the surface chemical ***,adsorption column breakthrough experiment is conducted on the activated carbon prepared while commercial activated carbon（AC） was used as *** time for KOH-impregnated AC,commercial AC and KOH-impregnated AC with CO activation were 3s,3s and *** on the results,KOH impregnated-AC showed longer breakthrough time compared to KOHimpregnated AC with CO activation,which means that KOH-impregnated AC have better performance for CO adsorption and equivalent to the commercial *** conclusion,results showed that the EFB base-porous carbon sorbent prepared by carbonization and chemical activation process is a good adsorbent for CO adsorption.

关键词： Empty fruit bunch Activated carbon Carbon dioxide gas Breakthrough

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Alumina coating on mild steel by atmospheric pressure chemical vapour deposition using metallorganic source 5

Alumina coating on mild steel by atmospheric pressure chemic...

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5th Brunei International Conference on engineering and Technology, BICET 2014

作者： Sathiyamoorthy, D. Selvakumar, J. Petroleum and Chemical Engineering Programme Area Faculty of Engineering Institut Teknologi Brunei P.O. Box 2909 Tungku Gadong Brunei KNRPC BARCF Kalpakkam603102 India

ISBN: (纸本)9781849199919

Thin film of alumina was deposited by APCVD at 1073 K in argon gas environment using tris(acetylacetonato)aluminium(III) as precursor which was successfully synthesised in house. The thermal stability and relevant properties of the precursor were measured by employing a horizontal, dual-arm single-furnace and thermo gravimetric analyser. The alumina coated mild steel tubes (∼5 cm) were tested for their corrosion stability in concentrated nitric acid environment and the coated tube has been found to withstand extreme corrosion condition.

关键词： chemical vapor deposition

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