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Institution

Universiti Teknologi Petronas

EducationIpoh, Malaysia
About: Universiti Teknologi Petronas is a education organization based out in Ipoh, Malaysia. It is known for research contribution in the topics: Adsorption & Ionic liquid. The organization has 6127 authors who have published 11284 publications receiving 119400 citations.


Papers
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Journal ArticleDOI
01 Dec 2018-Fuel
TL;DR: In this paper, the authors investigated the influence of the combination of zinc oxide nanocrystals (ZnO-NCs) with EM energy irradiation on the recovery efficiency of enhanced oil recovery.

49 citations

Journal ArticleDOI
TL;DR: In this paper, the authors evaluated the prediction of the activity coefficient (γs∞) at infinite dilution in several classes of ILs using the conductor-like screening model for real solvents (COSMO-RS), a model based on unimolecular quantum chemistry calculations.
Abstract: Ionic liquids (ILs) gained a lot of attention, from both academe and industry, as alternative liquids for different types of applications. Chemical and physical characteristics can be designed with the large availability of cation and anions. Experimental measurement of all these systems is not practically feasible, hence requiring the use of a computational predictive model study. This work evaluates the prediction of the activity coefficient (γs∞) at infinite dilution in several classes of ILs using the conductor-like screening model for real solvents (COSMO-RS), a model based on unimolecular quantum chemistry calculations. Comparison of the experimental γs∞ value with COSMO-RS predicted data is carried out, and absolute average relative deviation was determined to be 24.1%, indicating that the COSMO-RS model presents a reliable prediction to determine γs∞ in a wide range of ILs. The observation also confirms that polarizability of ILs plays a crucial role in their interaction with thiophene. With respe...

49 citations

Journal ArticleDOI
TL;DR: In this paper, a batch-wise supercritical water gasification (SCWG) of two types of microalgae was carried out in the absence and the presence of nickel catalysts in a laboratory scale reactor at 385 ÂC and 26 ÂMPa.
Abstract: Batch-wise supercritical water gasification (SCWG) of two types of microalgae was carried out in the absence and the presence of nickel catalysts in a laboratory scale reactor at 385 °C and 26 MPa. The microalgae used include Chlorella vulgaris (high protein and low carbohydrate contents) and Scenedesmus quadricauda (low protein and high carbohydrate contents). Time course trend of the total carbon-based gas yield of C. vulgaris and S. quadricauda was similar, showing asymptotic convex changes that may be attributed to the positive reaction order of SCWG of microalgae. In the presence of catalyst, the yield increased to 80–90% with time in an asymptotic way, whereas it reached only 12% in the absence of catalyst. For non-catalytic SCWG, the predominant gas product was carbon dioxide, which may be formed by decarboxylation of biomass. For catalytic SCWG, the major gas products were CH 4 , CO 2 , H 2 , and CO, of which composition can be explained by successive reactions of (1) hydrolytic breakdown of macromolecules to smaller organics, (2) gasification of organics to CO, CO 2 and H 2 , (3) shift reaction of CO, and (4) methanation of CO and CO 2 , and their equilibrium.

49 citations

Journal ArticleDOI
TL;DR: The study revealed that C. polygonoides ash proved to be an effective, alternative, inexpensive, and environmentally benign biosorbent for MB removal from aqueous solution.
Abstract: The ash of C. polygonoides (locally called balanza) was collected from Lakki Marwat, Khyber Pakhtunkhwa, Pakistan, and was utilized as biosorbent for methylene blue (MB) removal from aqueous solution. The ash was used as biosorbent without any physical or chemical treatment. The biosorbent was characterized by using various techniques such as Fourier transform infrared spectroscopy (FTIR), thermogravimetric analysis (TGA), and scanning electron microscopy (SEM). The particle size and surface area were measured using particle size analyzer and Brunauer-Emmett-Teller equation (BET), respectively. The SEM and BET results expressed that the adsorbent has porous nature. Effects of various conditions such as initial concentration of methylene blue (MB), initial pH, contact time, dosage of biosorbent, and stirring rate were also investigated for the adsorption process. The rate of the adsorption of MB on biomass sample was fast, and equilibrium has been achieved within 1 hour. The kinetics of MB adsorption on biosorbent was studied by pseudo-first- and pseudo-second-order kinetic models and the pseudo-second-order has better mathematical fit with correlation coefficient value (R2) of 0.999. The study revealed that C. polygonoides ash proved to be an effective, alternative, inexpensive, and environmentally benign biosorbent for MB removal from aqueous solution.

49 citations

Proceedings ArticleDOI
12 Jun 2012
TL;DR: The aim of this study is to propose a framework for RCM in geographically distributed software development systems and describe the identification of the communication risks, their causes and effects duringRCM in GSD systems.
Abstract: Presently, software systems are becoming an important module of businesses in the world. Most of the organizations are adopting Global Software Development (GSD), and it is continuously getting faster. Organizations are trying to distribute their work worldwide. However, distributed software development is not an easy task and the organizations face different challenges. Software Requirement Change Management (RCM) is one of them and it becomes more difficult in the context of the GSD. Currently, there is no framework available, which can be used for the RCM in GSD organizations. The aim of this study is to propose a framework for RCM in geographically distributed software development systems and describe the identification of the communication risks, their causes and effects during RCM in GSD systems.

49 citations


Authors

Showing all 6203 results

NameH-indexPapersCitations
Muhammad Imran94305351728
Muhammad Shahbaz92100134170
Muhammad Farooq92134137533
Markus P. Schlaich7447225674
Abdul Basit7457020078
Keat Teong Lee7127616745
Abdul Latif Ahmad6849022012
Cor J. Peters522629472
Suzana Yusup524378997
Muhammad Nadeem524099649
Umer Rashid5138110081
Hamidi Abdul Aziz493459083
Serge Palacin452018376
Muhammad Awais432726704
Zakaria Man432455301
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Performance
Metrics
No. of papers from the Institution in previous years
YearPapers
202338
2022128
20211,303
20201,316
2019978
20181,029