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6th National Conference on Postgraduate Research, NCON-PGR 2022

作者： Kamaludin, Nur Aqilah Suhaidi, Nur Najwa Syuhada Ismail, Norasyikin Faculty of Chemical and Process Engineering Technology Universiti Malaysia Pahang Lebuhraya Tun Razak Gambang Pahang26300 Malaysia

EOR or Enhanced Oil Recovery has been demonstrated to be an efficient oil recovery technology for recovering bypassed oil and residual oil that has become stranded in the reservoir. The goal of implementing EOR is to extend reservoir life beyond previous economic constraints by assisting in the use of water floods or other traditional methods of extending reservoir life. The flooding method has been shown to be the most effective among all improved oil recovery approaches, and it is known as the surfactant flooding method due to its ability to minimize interfacial tension and improve mobility control. It has been shown to be one of the most efficient tertiary recovery strategies for achieving high displacement efficiency. The tertiary approach's performance is heavily dependent on a number of critical components, including surfactant content, pH, and salinity. Academics are currently interested in Green Enhanced Oil Recovery (GEOR), or green enhanced oil recovery, because it will help drive down costs while also being more environmentally friendly. Researchers have shown that developing a green-based surfactant for surfactant flooding is feasible and, in some cases, more efficient. As a result, the latest research on green surfactants from various resources used for surfactant flooding for enhanced oil recovery was presented in this review paper. © 2022 Elsevier Ltd. All rights reserved.

关键词： Oil well flooding

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Synthesis and characterization of cellulose nanocrystal derived from paper as nanofiller for polymer insulation materials 2

Synthesis and characterization of cellulose nanocrystal deri...

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2nd International Symposium on Advanced Functional Materials, ISAFM 2023

作者： Amirah Badi, Nurul Shafiqah Zul Hilmey Makmud, Mohamad Se Mun, Chin Jamain, Zuhair Asik, Jahimin Mohd Amin, Khairatun Najwa Research Group Faculty of Science and Natural Resources Universiti Malaysia Sabah Sabah Kota Kinabalu88400 Malaysia Industrial Chemistry Programme Faculty of Science and Natural Resources Universiti Malaysia Sabah Sabah Kota Kinabalu88400 Malaysia Faculty of Chemical and Process Engineering Technology College of Engineering Technology Universiti Malaysia Pahang Kuantan Pahang Gambang26300 Malaysia

The synthesis and characterization of cellulose nanocrystal by utilizing filter paper as the source of material deserves to be an advanced approach. Nanocellulose has received enormous attention due to its unique properties. Being the most abundant organic polymer on earth, nanocellulose is the most suitable candidate for alternative replacement of petroleum-based products. The cellulose was extracted from filter paper by chemical processes involved alkali treatment, bleaching treatment, and acid hydrolysis. Cellulose nanocrystal has been characterized by scanning electron microscopy (SEM), Fourier transform infrared (FTIR) spectroscopy, X-ray diffraction (XRD) and Electrical Impedance Spectroscopy (EIS). The dielectric permittivity of the prepared CNC have been investigated in the different temperatures. The nanofiller CNC exhibits a higher real permittivity value at elevated temperatures (60 °C) in the low-frequency region. At high-frequency region, the real permittivity is independent on temperature. In brief, the studies point to the application potential of CNC for future insulation materials. © 2024 Elsevier Ltd. All rights reserved.

关键词： Scanning electron microscopy

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Activating Fenton-like reaction by hydrochars containing persistent free radicals derived from various pomelo peel components

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Biochar 2024年第1期6卷 1230-1245页

作者： Chaoyang Zhang Zili Jiang Wanxue Sun Yuyuan Tang Zhanying Zhang Changrong Shi Xiuxiu Ruan School of Environmental and Chemical Engineering Shanghai UniversityNo.99 Shangda RoadShanghai 200444People’s Republic of China. Center of Green Urban Mining and Industry Ecology Shanghai UniversityNo.99 Shangda RoadShanghai 200444People’s Republic of China. School of Mechanical Medical and Process EngineeringFaculty of EngineeringQueensland University of TechnologyBrisbaneQLD 4000Australia. Centre for Agriculture and the Bioeconomy Queensland University of TechnologyBrisbaneQLD 4000Australia.

To reveal the influence of the diversity of precursors on the formation of environmental persistent free radicals(EPFRs),pomelo peel(PP)and its physically divided portion,pomelo cuticle(PC),and white fiber(WF)were used as precursors to prepare six hydrochars:PPH-Fe,PCH-Fe,WFH-Fe,PPH,PCH,and WFH with and without Fe(III)addition during hydrothermal carbonization(HTC).PPH-Fe and WFH-Fe had higher EPFRs content(9.11×10^(18)and 8.25×10^(18)spins·g^(−1))compared to PPH and WFH(3.33×10^(18)and 2.96×10^(18)spins·g^(−1)),indicating that iron-doping favored EPFRs ***,PCH-Fe had lower EPFRs content(2.78×10^(18)spins·g^(−1))than PCH(7.95×10^(18)spins·g^(−1)),possibly due to excessive iron leading to the consumption of the generated *** another reason,the required Fe(III)amount for EPFRs formation might vary among different *** has a lower concentration of phenolic compounds but 68-97%fatty acids,while WF and PP are rich in cellulose and *** the Fenton-like reaction,oxygen-centered radicals of hydrochar played a significant role in activating H_(2)O_(2)and efficiently degrading bisphenol A(BPA).Mechanisms of reactive oxygen species(ROS)generation in hydrochar/H_(2)O_(2)system were *** on hydrochar activate H_(2)O_(2)via electron transfer,creating·OH and 1O2,leading to BPA *** importantly,the embedded EPFRs on the hydrochar’s inner surface contributed to the prolonged Fenton-like reactivity of PPH-Fe stored for 45 *** study demonstrates that by optimizing precursor selection and iron doping,hydrochars can be engineered to maximize their EPFRs content and reactivity,providing a cost-effective solution for the degradation of hazardous pollutants.

关键词： Pomelo peel Hydrochar Environmental persistent free radicals(EPFRs) Catalysis Fenton-like BPA degradation

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Evaluation of antioxidant, antibacterial and anticancer activities of Ganoderma lucidum extracts 6

Evaluation of antioxidant, antibacterial and anticancer acti...

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6th National Conference on Postgraduate Research, NCON-PGR 2022

作者： Azahar, N.I. Swan, S.Y. Mohd Mokhtar, N. Abd Aziz, M.A. Arifin, M.A. Faculty of Chemical & Process Engineering Technology Universiti Malaysia Pahang Gambang Pahang26300 Malaysia Faculty of Civil Engineering Technology Universiti Malaysia Pahang Gambang Pahang26300 Malaysia

G. lucidum is an oriental fungus loaded with antioxidant, antimicrobial and anticancer properties. G. lucidum extracts obtained by using soxhlet and Ultrasonic-Assisted Extraction (UAE). The antioxidant properties determined by DPPH assay resulting in IC50 value of extract for soxhlet water 372.21 μg/mL followed by soxhlet ethanol 431.00 μg/mL, UAE ethanol 541 μg/mL and UAE water 560.90 μg/mL shown weak antioxidant properties. Well plate diffusion used for antimicrobial activity test against S. aureus and E. coli. UAE water extract shows highest antibacterial properties against S. aureus (20-23) mm followed by soxhlet water extract (6-13) mm. The ethanol extract for both soxhlet and UAE are (5-13) mm and (4-14) mm respectively. G. lucidum extract exhibited zero inhibition zone against E. coli due to presence of barrier membrane. CCK-8 used to test anticancer activity against MCF-7 cells. The IC50 values of soxhlet ethanolic extract is 4.797 μg/mL followed by UAE ethanolic extract 5.291 μg/mL, soxhlet water extract 7.196 μg/mL and UAE water extracts 9.455 μg/mL. The lower IC50 value indicated that the extracts inhibited cell viability of MCF-7. © 2022 Elsevier Ltd. All rights reserved.

关键词： Escherichia coli

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Composition of fatty acid methyl ester in microalgae Chlorella vulgaris: Comparison between various methods of harvesting, extraction and transesterification

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Materials Today: Proceedings 2023年

作者： Mat Yasin, N.H. Mohd Yusop, M.A. Awang Kechik, N.A.A. Zahuri, A.Z. Faculty of Chemical and Process Engineering Technology College of Engineering Technology Universiti Malaysia Pahang 26300 Gambang Pahang Malaysia

The aim of the study was to identify which of methods produces the highest yield of fatty acid methyl ester (FAME) from microalgae. Different methods of harvesting (centrifugation, Cen & coagulation, Co), extraction (Test Tube, TT & Soxhlet, Sox) and transesterification (direct transesterification, d-trans & extraction transesterification, ext-trans) were considered. The procedures of this research consists of microalgae cultivation, harvesting of biomass and extraction of oil to obtain the lipid. The further process of converting lipid into FAME is followed by transesterification process. The FAME compositions of Chlorella vulgaris were analyzed using Gas chromatography mass spectrometry (GC-MS). The main components were consists of palmitic, stearic and oleic acids for both transesterification methods. However, FAME extracted from d-trans contained more components (linoleic and linolenic acid) than ext-trans. Furthermore, the highest amount of FAME gained by ext-trans was produced by the method of centrifugation-test tube (Cen-TT). Although Cen-TT produced the highest amount of FAME for ext-trans, it still cannot meet the highest amount of FAME produced by d-trans. Therefore, the Cen-TT method was selected to be the best microalgae harvesting and extraction method in ext-trans meanwhile the most efficient transesterification method was d-trans. © 2023 Elsevier Ltd. All rights reserved.

关键词： Microalgae

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Removal enhancement of persistent basic fuchsin dye from wastewater using an eco-friendly, cost-effective Fenton process with sodium percarbonate and waste iron catalyst

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Environmental Science and Pollution Research 2024年第31期31卷 43673-43686页

作者： Aouni, Saoussen Imene Ghodbane, Houria Merouani, Slimane Lakikza, Imane Boublia, Abir Yadav, Krishna Kumar Djelloul, Chawki Albakri, Ghadah Shukri Elboughdiri, Noureddine Benguerba, Yacine Laboratory of Physics for Matter and Radiation Mohamed Cherif Messadia-Souk Ahras University P.O. Box 1553 Souk Ahras41000 Algeria Laboratory of Environmental Process Engineering Department of Chemical Engineering Faculty of Process Engineering University Salah Boubnider-Constantine 3 P.O. Box 72 Constantine25000 Algeria Département de Génie des Procédés Faculté de Technologie Université Ferhat ABBAS Sétif-1 Sétif19000 Algeria Faculty of Science and Technology Madhyanchal Professional University Ratibad Bhopal462044 India Environmental and Atmospheric Sciences Research Group Scientific Research Center Al-Ayen University Thi-Qar Nasiriyah64001 Iraq Laboratory of Reaction Engineering Faculty of Mechanical Engineering and Process Engineering USTHB Algiers Algeria Department of Teaching and Learning College of Education and Human Development Princess Nourah bint Abdulrahman University P.O. Box 84428 Riyadh11671 Saudi Arabia Chemical Engineering Department College of Engineering University of Ha’il Ha’il81441 Saudi Arabia Chemical Engineering Process Department National School of Engineers Gabes University of Gabes Gabes6029 Tunisia Ferhat Abbas Setif 1 University Setif Algeria

Abstract: In this comprehensive investigation, we evaluate the efficacy of the Fenton process in degrading basic fuchsin (BF), a resistant dye. Our primary focus is on the utilization of readily available, environmentally benign, and cost-effective reagents for the degradation process. Furthermore, we delve into various operational parameters, including the quantity of sodium percarbonate (SPC), pH levels, and the dimensions of waste iron bars, to optimize the treatment efficiency. In the course of our research, we employed an initial SPC concentration of 0.5 mM, a pH level of 3, a waste iron bar measuring 3.5 cm in length and 0.4 cm in diameter, and a processing time of 10 min. Our findings reveal the successful elimination of the BF dye, even when subjected to treatment with diverse salts and surfactants under elevated temperatures and acidic conditions (pH below 3). This underscores the robustness of the Fenton process in purifying wastewater contaminated with dye compounds. The outcomes of our study not only demonstrate the efficiency of the Fenton process but highlight its adaptability to address dye contamination challenges across various industries. Critically, this research pioneers the application of waste iron bars as a source of iron in the Fenton reaction, introducing a novel, sustainable approach that enhances the environmental and economic viability of the process. This innovative use of recycled materials as catalysts represents a significant advancement in sustainable chemical engineering practices. Graphical abstract: (Figure presented.). © The Author(s), under exclusive licence to Springer-Verlag GmbH Germany, part of Springer Nature 2024.

关键词： Iron

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Influence of dope composition of polyethersulfone membrane blend with cellulose nanocrystal and carboxylated multi-walled carbon nanotube on humic acid rejection

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Materials Today: Proceedings 2024年 107卷 53-58页

作者： Nor Azura C. Mahmud Mazrul Nizam Abu Seman Mohd Sobri Takriff Wei Lun Ang Syed M. Saufi Faculty of Chemical and Process Engineering Technology Universiti Malaysia Pahang Lebuhraya Persiaran Tun Khalil Yaakob 26300 Gambang Kuantan Pahang Malaysia Chemical and Water Desalination Engineering Program College of Engineering University of Sharjah United Arab Emirates Department of Chemical & Process Engineering Faculty of Engineering & Built Environment Universiti Kebangsaan Malaysia 43600 Bangi Selangor Malaysia

A full factorial experimental design was employed to investigate the dope composition of a membrane made of cellulose nanocrystal (CNC), multi-walled carbon nanotube (MWCNT), and polyethersulfone (PES) for its ability to reject humic acid (HA). Four factors were screened, including PES composition, polyvinylpyrrolidone content, CNC content, and carboxylated MWCNT content. The membranes were tested for HA rejection using a 10-ppm aqueous feed solution. The results indicated that the percentage of MWCNT had the most significant impact, contributing 72.31% to the overall contribution. The fabricated membranes exhibited high HA removal capacity of up to 90% for the membrane embedded with MWCNT. The model's predicted values agreed reasonably with the experimental data, indicating the model's validity. This study provides insights into the development of CNC/MWCNT/PES membranes for efficient HA rejection in water treatment applications.

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Microwave Assisted Technique for Oil Recovery from Oily Sludge Shale Drilled Cuttings

Microwave Assisted Technique for Oil Recovery from Oily Slud...

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2023 SPE Nigeria Annual International Conference and Exhibition, NAIC 2023

作者： Agi, A. Junin, R. Shakuam, M. Gbadamosi, A. Ridzuan, N. Aini Mahat, S.Q. Gbonhinbor, J. Oseh, J. Faculty of Chemical and Process Engineering Technology College of Engineering Technology Universiti Malaysia Pahang Gambang Pahang Malaysia Department of Petroleum Engineering School of Chemical and Energy Engineering Faculty of Engineering Universiti Teknologi Malaysia Malaysia Department of Petroleum Engineering College of Petroleum and Geosciences King Fahd University of Petroleum and Minerals Saudi Arabia Department of Petroleum Engineering Niger Delta University Wilberforce Island Amassoma Yenagoa Nigeria

ISBN: (纸本)9781959025177

Oily sludge, obtained during drilling processes, is considered a hazardous waste due to its composition. Conventional techniques of treating oily sludge indicates that desorption of the oily sludge is inhibited by asphaltenes. Herein, the effect of microwave power on oil recovery from contaminated drill cutting was investigated. Also, the effect of drilled cutting sizes on oil recovery was evaluated. Besides, the impact of microwave exposure time (10-60 minutes) on oil recovery was determined. Based on this, the mechanisms of microwave disintegration of the oily sludge were analyzed. Experimental result depicts that higher microwave power was more effective in the desorption of oil from the drilled cuttings. Moreover, more oil was recovered from smaller sizes of the drilled cuttings at a longer exposure time. The mechanisms of dipolar interaction and ionic conduction broke the hydrogen bond between the asphaltene and solid particles by this means enabling oil recovery of 59-99% from the contaminated drilled cuttings. Copyright © 2023 Society of Petroleum Engineers.

关键词： Desorption

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Effects of different seed forms on crystal size distribution for seeded batch crystallization process

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Materials Today: Proceedings 2024年 107卷 23-28页

作者： Siti Zubaidah Adnan Noor Asma Fazli Abdul Samad Faculty of Chemical & Process Engineering Technology Universiti Malaysia Pahang Lebuh Persiaran Tun Khalil Yaakob Kuantan 26300 Pahang Malaysia

The effects of different seed forms on crystal product distribution are presented for optimizing crystal size distribution (CSD) in the case of seeded batch cooling crystallization process. Three different seed distributions and quality are introduced as variable parameter for CSD control of seeded batch crystallization process via simulation in Matlab software. Similar implementation is conducted in the experimental study using the same operating conditions and parameters. Cubic cooling profile is adapted as the temperature profile for potash alum crystallization system due to its ability to control secondary nucleation. The experimental data obtained from laboratory works are validated the simulation results from Matlab where good agreement has been achieved. In terms of mean crystal size of the final CSD, the seed profile with 0.29 standard deviation labelled Sieved Seed 2, produces the best seed profile for seeded batch potash alum crystallization process because it has the largest size of crystals at mean crystal size of 500 μm grown from 90 μm of seed crystals. However, considerable fine crystals at mean crystal size of 30 μm are also obtained indicating trade-off between large size of crystals and fine crystals are needed. In conclusion, this work highlights the effects of different seed quality in terms of distribution and shape on crystal size distribution as one of the important quality specifications in crystallization process and demonstrates narrow distribution of seed crystals as recommendation on the best seed quality for producing desired CSD.

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Advances in thermal-related analysis techniques for solid-state lithium batteries

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InfoMat 2023年第4期5卷 77-116页

作者： Jianan Wang Kai Yang Shiyi Sun Qianyue Ma Gong Yi Xin Chen Ze Wang Wei Yan Xinhua Liu Qiong Cai Yunlong Zhao Department of Environmental Science and Engineering State Key Laboratory of Multiphase Flow in Power EngineeringSchool of Energy and Power EngineeringXi'an Jiaotong UniversityXi'anthe People's Republic of China Department of Chemical&Process Engineering Faculty of Engineering and Physical SciencesUniversity of SurreyGuildfordUK Advanced Technology Institute University of SurreyGuildfordUK School of Transportation Science and Engineering Beihang UniversityBeijingthe People's Republic of China

Solid-state lithium batteries(SSLBs)have been broadly accepted as a promising candidate for the next generation lithium-ion batteries(LIBs)with high energy density,long duration,and high *** intrinsic non-flammable nature and electrochemical/thermal/mechanical stability of solid electrolytes are expected to fundamentally solve the safety problems of conventional ***,thermal degradation and thermal runaway could also happen in *** example,the large interfacial resistance between solid electrolytes and electrodes could aggravate the joule heat generation;the anisotropic thermal diffusion could trigger the uneven temperature distribution and formation of hotspots further leading to lithium dendrite *** research efforts have been devoted to exploring solid electrolytes with outstanding performance and harmonizing interfacial incompatibility in the past *** have been fewer comprehensive reports investigating the thermal reaction process,thermal degradation,and thermal runaway of *** review seeks to highlight advanced thermal-related analysis techniques for SSLBs,by focusing particularly on multiscale and multidimensional thermal-related characterization,thermal monitoring techniques such as sensors,thermal experimental techniques imitating the abuse operating condition,and thermalrelated advanced *** perspectives are proposed to bridge fundamental studies to technological relevance for better understanding and performance optimization of SSLBs.

关键词： characterization monitoring simulation solid-state batteries thermal technique

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