检索结果-内蒙古大学图书馆

Removal of 2,6-dichlorophenol by adsorption with activated polypropylene nanofiber

Journal of King Saud University - engineering Sciences 2024年第8期36卷 677-683页

作者： Krishnaiah, Duduku Baskaran, Arswitaa Anisuzzaman, S.M. Reddy Prasad, D.M. Chemical Engineering Programme School of Engineering and Information Technology Universiti Malaysia Sabah Sabah Kota Kinabalu88999 Malaysia Petroleum and Chemical Engineering Programme Area Faculty of Engineering Universiti Teknologi Brunei Tungku Highway GadongBE1410 Brunei

2,6-Dichlorophenol is an organochloride of phenol, and it is considered one of the emerging pollutants in wastewater due to its extreme corrosive nature and toxicity even at low concentrations. Melt-blown activated polypropylene (PP) nanofiber is a polymeric adsorbent and it is used to investigate the removal of 2,6-dichlorophenol. The high surface-to-volume ratio, high porosity, low surface energy, low density, and excellent mechanical characteristics of melt-blown PP nanofiber make it a suitable adsorbent. On the removal efficiency of 2,6-dichlorphenol, the influence of the initial concentration of 2,6-dichlorphenol, the weight of PP nanofiber utilized, temperature, and pH of the solution were examined. The Langmuir model, with a maximum adsorption capacity of 44.44 mg/g, was found to be the best match for the adsorption isotherm. Scanning Electron Microscopy (SEM) and Fourier-Transform Infrared Spectroscopy were used to examine melt-blown PP nanofiber before and after adsorption (FTIR). Through SEM images, it was proven that the average diameter of PP nanofiber after adsorption had increased up to 7.93 μm. Furthermore, the existence of phenolic chemicals on the surface of PP nanofiber is confirmed by FTIR analysis spectra. The pseudo-first-order model matched the kinetic data nicely. © 2021 The Authors

关键词： Scanning electron microscopy

来源：评论

学校读者我要写书评

暂无评论

The Study of the Integration Between Pectin and Sodium Dodecyl-Sulfate on Oil Recovery

The Study of the Integration Between Pectin and Sodium Dodec...

引用

2024 SPE Nigeria Annual International Conference and Exhibition, NAIC 2024

作者： Musa, M.S.M. Adam, N.H.B. Gbonhinbor, J.R. Ridzuan, N. Mahat, S.Q.A. Yakasai, F. Ngouangna, E.N. Oseh, J.O. Agi, A. Oil and Gas Engineering Programme Faculty of Engineering Universiti Malaysia Sabah Jalan UMS Sabah Kota Kinabalu Malaysia Department of Petroleum Engineering Niger Delta University Wilberforce Island Bayelsa State Amassoma Nigeria Faculty of Chemical and Process Engineering Technology College of Engineering Technology Universiti Malaysia Pahang Al-Sultan Abdullah Pahang Gambang Malaysia Department of Chemical and Petroleum Engineering Faculty of Engineering Bayero University Kano Nigeria Department of Petroleum Engineering School of Chemical and Energy Engineering Faculty of Engineering Universiti Teknologi Malaysia Johor Bahru Malaysia

ISBN: (纸本)9781959025474

Surfactant flooding is a recognized technique within the realm of chemical enhanced oil recovery (CEOR), to enhance oil recovery in cases of continual depletion in conventional oil reserves. This method has a track record of effectively increasing oil recovery rates. The process involves multiple factors, including the reduction of interfacial tension (IFT), alterations in wettability, the creation of foam, and emulsification. Despite its success, a primary concern associated with surfactant flooding is the emergence of increased fingering effects, resulting in conformance issues like excessive water production. The primary objective of this research is to examine the interaction between pectin and sodium dodecyl sulfate (SDS) in the context of oil recovery, assessing the collaborative potential of pectin in conjunction with SDS to amplify oil production, and evaluating the impact of sodium chloride (NaCl) salinity on the behaviour of pectin and SDS in the context of oil recovery. To address water production concerns, this study employs polymer to augment water viscosity. The interaction between pectin and SDS will be scrutinized by observing three distinct sand packs, each containing surfactant, polymer, and a surfactant-polymer combination, respectively. The findings indicated significant improvements in oil recovery using different enhanced oil recovery (EOR) techniques. Freshwater flooding resulted in a 15% increase in oil recovery compared to saltwater flooding. Polymer flooding with a concentration of 0.6 wt% demonstrated the highest efficacy of 77.85% improvement in oil recovery compared to waterflooding. Surfactant flooding, while slightly less effective than polymer flooding, but still showed a remarkable 48.94% increase in oil recovery after waterflooding. However, surfactant flooding's effectiveness could be constrained by factors like reservoir characteristics and fluid properties. Despite this, the study revealed that combining surfactant and polymer fl

关键词： Surface active agents

来源：评论

学校读者我要写书评

暂无评论

The Use of Strychnos Potatorum in an Environmental IoT System for the Treatment of Commercial and Domestic Washing Discharge in Continuous Column Studies 30th

The Use of Strychnos Potatorum in an Environmental IoT Syste...

引用

Advances in Systems engineering - Proceedings of the 30th International Conference on Systems engineering, ICSEng 2023

作者： Ramalingham, Senthilkumar Prasad, Reddy Kumar, K. Saravana Shanmugam, Thirumurugan Al Toobi, Khalsa Al Yaroubi, Aya Al Jabri, Maryam College of Engineering and Technology University of Technology and Applied Sciences Suhar Oman Petroleum and Chemical Engineering Programme Faculty of Engineering Universiti Teknologi Brunei Bandar Seri Begawan Brunei College of Computing and Information Sciences University of Technology and Applied Sciences Suhar Oman

ISBN: (纸本)9783031405785

Wastewater treatment and access to clean drinking water are major problems in emerging nations. Turbidity is caused by pollutants in the form of colloid particles found in waste water, and the color of waste water is brought on by the existence of naturally occurring mineral ions. The traditional, costly way of removing turbidity and discolored organic matter is coagulation treatment with chemicals. As a result, a different and affordable technique for eliminating turbidity using natural coagulants is suggested. Strychnos potatorum, a plant-based coagulant, is one of the natural coagulants that can be used in wastewater treatment to decrease it, and it is increasingly being used in this capacity. This study work concentrated on removing turbidity from both commercial and household washing machines using Strychnos potatorum seeds by creating an environmental system. Parameters, including pH(6), size (0.25 cm), and dosage (0.6 gm), have been optimized in batch study. The bed height (25 cm) and flow rate (5 ml/min) in the continuous mode of study have been optimized based on optimized parameters in the batch study. Results of FTIR and SEM tests confirmed the removal of turbidity. © 2023, The Author(s), under exclusive license to Springer Nature Switzerland AG.

关键词： Wastewater treatment

来源：评论

学校读者我要写书评

暂无评论

Correction: Water-Weakening Effects on the Failure Behavior of Mudstones

引用

Rock Mechanics and Rock engineering 2023年第12期56卷 9187-9188页

作者： Iyare, U. C. Blake, O. O. Frash, L. P. Carey, J. W. Jones, Dahlia Ramjarrie, Kerneese Los Alamos National Laboratory Los Alamos USA Petroleum Geoscience Programme Department of Chemical Engineering University of the West Indies St. Augustine Trinidad and Tobago

来源：评论

学校读者我要写书评

暂无评论

Enhanced oil recovery by spontaneous imbibition of nanofluid assisted low saline alkali polymer in sandstone reservoir

引用

Journal of Molecular Liquids 2025年 428卷

作者： Seetharaman, Gomathi Rajalakshmi Devakumar, N.P. Deshmukh, Minal Sangwai, Jitendra S. Enhanced Oil Recovery Laboratory Petroleum Engineering Programme Department of Ocean Engineering Indian Institute of Technology Madras Chennai600 036 India Department of Chemical Engineering Indian Institute of Technology Madras Chennai600 036 India Center of Excellence on Subsurface Mechanics and Geo-Energy Indian Institute of Technology Madras Chennai600 036 India Maharashtra Pune411038 India

Spontaneous imbibition plays a crucial role in enhanced oil recovery (EOR). In this work, the synergistic effect of low salinity water, alkali, polymer, and nanoparticles was explored as a potential oil recovery agent for low acid number crude oil in a sandstone reservoir. Silica nanoparticles (15 nm) at various concentrations (100–1000 ppm) were dispersed in low salinity water (lowsal) containing sodium carbonate (alkali) and polyacrylamide (PAM, polymer), referred to as low saline-alkali-polymer-nanofluid (LSAP-NFs). Interfacial tension (IFT) and contact angle measurements were performed at 50 °C to understand the impact of LSAP-NFs on EOR through spontaneous imbibition. The results showed that the larger molecular size of the polymer hindered the effect of alkali in reducing the IFT and altering the wettability. The imbibition efficiency of the LSAP-NFs was evaluated using an Amott cell at 50 °C with Berea sandstone core samples. The spontaneous imbibition results showed that the imbibition effectiveness of the LSAP-NFs was higher than that of simple alkali, LSAW, and LSAP flooding agents. The prominent mechanism of imbibition was studied by analyzing the solid–liquid interfacial force using F-D mode from Atomic Force Microscope (AFM) investigations. The interfacial mechanisms, including IFT, wettability, surface roughness, and solid–liquid interfacial forces, confirmed that the imbibition process is equally controlled by gravity and capillary forces. Further, the solid–liquid interfacial force exposed a fully hydrophilic surface with silica nanofluid, confirming that capillary force dominates imbibition. This work identifies the fundamental mechanism by which spontaneous imbibition impacts enhanced oil recovery. © 2025 Elsevier B.V.

关键词： Sandstone

来源：评论

学校读者我要写书评

暂无评论

Experimental evaluation of water-based Al2O3 and MgO nanofluids on selective flat plate collector thermal efficiency

引用

AIP Conference Proceedings 2023年第1期2643卷

作者： Nur Wardhyana Yahya Reddy Prasad Dakshinamoorthy Sathiyamoorthy 1Petroleum and Chemical Engineering Programme Area Faculty of Engineering Universiti Teknologi Brunei Jalan Tungku Link Gadong BE1410 Brunei Darussalam

Solar water heating system with flat plate collector have low thermal efficiency compared to conventional electric water heater due to the utilization of low thermal conductivity fluid, such as water. To improve the thermal conductivity of water, nanoparticles are being suspended in water to produce nanofluid. This study experimentally investigated the thermal performance of water based aluminium oxide (Al2O3) and magnesium oxide (MgO) nanofluids of volume fractions 0.5, 1.0 and 1.5 vol % circulated at a constant flowrate of 4 L/h through a selective flat plate collector solar water heating system receiving a constant irradiance of 1400 W/m2. The nanofluids were prepared by dispersing the nanoparticles in distilled water using a magnetic stirrer for 24 hours without any surfactants. Results showed presence of Al2O3 nanoparticles in water have increased the collector thermal efficiency by 63.8%, 76.9% and 88.9% for 0.5, 1.0 and 1.5 vol%, respectively. Similar enhancement in collector thermal efficiency was also observed with MgO nanoparticles with 52.7%, 66.4% and 79.9% with increasing volume fraction. Findings indicated the increase in volume fraction theoretically raise the thermal conductivity of the nanofluid, subsequently raising the collector thermal efficiency.

关键词：

来源：评论

学校读者我要写书评

暂无评论

Development of Cellulose-Supported Pd-Nanocatalyst for the Heck Coupling and Michael Addition Reactions

SSRN

引用

SSRN 2024年

作者： Sarkar, Shaheen M. Rahman, Md Lutfor Hasan, Kamrul Khan, Md Maksudur Rahman O'Reilly, Emmet J. Rahim, Mohd Hasbi Ab. Department of Applied Science Technological University of the Shannon Moylish LimerickV94 EC5T Ireland Faculty of Science and Natural Resources Universiti Malaysia Sabah Sabah Kota Kinabalu88400 Malaysia Department of Chemistry Pure and Applied Chemistry Group College of Sciences University of Sharjah Sharjah27272 United Arab Emirates Petroleum and Chemical Engineering Programme Area Faculty of Engineering Universiti Teknologi Brunei GadongBE1410 Brunei SSPC the SFI research centre for Pharmaceuticals Department of Chemical Sciences Bernal Institute University of Limerick Limerick Ireland Faculty of Industrial Sciences & Technology Universiti Malaysia Pahang Gambang Kuantan26300 Malaysia

The utilization of cellulose-supported bio-resourced poly(hydroxamic acid) as a ligand for the palladium nanocomposite (PdNc-PHA) is an important synthetic strategy for the development of an effective, heterogeneous, and reusable nanocatalyst. Varieties of analytical methods were used to characterize the PdNc-PHA catalyst, including FTIR, FE-SEM, EDX, HR-TEM, XPS, and ICP-AES analyses. The results showed that the PdNc-PHA catalyst exhibits excellent durability and high catalytic activity in the Mizoroki-Heck and Michael addition reactions, leading to high yields of the desired corresponding products. The Mizoroki-Heck reaction of aryl/heteroaryl chlorides with olefins resulted in the production of cross-coupled products, while the Michael addition reaction of phenol/thiophenol and aliphatic cyclic/alicyclic amines with a variety of olefins afforded O-, S-, and N-alkylated products. Moreover, the catalyst could be recycled and reused up to ten times without any noticeable loss of its catalytic activity. This research represents a pivotal advancement in fostering in chemical bonds formation in organic synthons as well as utilization of bio-waste as a wealth material. © 2024, The Authors. All rights reserved.

关键词： Nanocomposites

来源：评论

学校读者我要写书评

暂无评论

Effect of bio-based nanosilica on the mechanical properties of single empty fruit bunch fibre

引用

AIP Conference Proceedings 2024年第1期3014卷

作者： Wan Mohd Eqhwan Iskandar Huei Ruey Ong Md. Maksudur Rahman Khan Farhana Sultana Toma Faculty of Engineering & Technology DRB-HICOM University of Automotive Malaysia Peramu Jaya Industrial Area 26607 Pekan Pahang Malaysia Petroleum and Chemical Engineering Programme area Universiti Technology Brunei Gadong Brunei Darussalam Brunei Faculty of Chemical and Process Engineering Technology Universiti Malaysia Pahang Lebuhraya Tun Razak 26300 Kuantan Pahang Malaysia

This research emphasizes the application of bio-based nanosilica, which was obtained from rice husk, for the purpose of improving the characteristics of discarded empty fruit bunch (EFB) fibers. One of the lignocellulose biomass byproducts from the palm oil industry is EFB fibre, which is typically used as a fuel source in boilers. Lightweight, nonabrasive, and biodegradable characteristics of EFB fibres make them ideal for usage as a reinforcing agent in composite and plastic applications. Unfortunately, the hydrophilic nature of EFB fibre results in weak interfaces because EFB surface and polymer matrix exhibit low interfacial adhesion, which may negatively affect the mechanical characteristics. To remedy this situation, the EFB fibre will be modified via environmental friendly ultrasound assisted alkaline and acrylic acid treatment. The bio-based nanosilica will be introduced during the acrylic acid treatment, in which can further improve the thermo-mechanical properties and control the biodegradability of the composite. The treated EFB fiber was characterized with Scanning Electron Microscopy (SEM), Fourier-Transform Infrared Spectroscopy (FTIR), and tensile testing. Findings reveal that the impurities on the surface of EFB fibre were washed away after the treatment and impregnation of nanosilica on the surface of EFB fibre were visualised. The results obtained from FTIR confirm that the hemicellulose has been eliminated within the range of 2900-1700 cm−1. Tensile test demonstrates that small amount of bio-based nanosilica improves the mechanical properties by 91.11% as compared to raw EFB fibre.

关键词：

来源：评论

学校读者我要写书评

暂无评论

Nanohybrid membrane in algal-membrane photoreactor: Microalgae cultivation and wastewater polishing

引用

Chinese Journal of chemical engineering 2019年第11期27卷 2799-2806页

作者： Woon Chan Chong Abdul Wahab Mohammad Ebrahim Mahmoudi Ying Tao Chung Kamrul Fakir Kamarudin Mohd Sobri Takriff Chemical Engineering Programme Faculty of Engineering and Built EnvironmentUniversiti Kebangsaan Malaysia43600 BangiSelangorMalaysia Department of Chemical Engineering Lee Kong Chian Faculty of Engineering and ScienceUniversiti Tunku Abdul RahmanJalan Sungai LongBandar Sungai LongCheras43000 KajangSelangorMalaysia Research Center for Sustainable Process Technology(CESPRO) Faculty of Engineering and Built EnvironmentUniversiti Kebangsaan Malaysia43600 BangiSelangorMalaysia Department of Chemical Engineering and Petroleum Engineering Faculty of EngineeringTechnology and Built EnvironmentUCSI UniversityNo.1Jalan Menara GadingUCSI HeightsCheras56000 Kuala LumpurMalaysia

Microalgae cultivation has gained tremendous attention in recent years due to its great potential in green biofuel production and wastewater treatment application. Membrane technology is a great solution in separating the microalgae biomass while producing high quality of permeate for recycling. The main objective of this study was to investigate the filtration performance of Ag/GO-PVDF(silver/graphene oxide-polyvinylidene fluoride) membrane in an algalmembrane photoreactor(A-MPR) by benchmarking with a commercial PVDF(com-PVDF) membrane. In this study, Chlorella vulgaris microalgae was cultivated in synthetic wastewater in an A-MPR for ammoniacal-nitrogen and phosphorus recovery and the wastewater was further filtered using Ag/GO-PVDF and com-PVDF membranes to obtain high quality water. Spectrophotometer was used to analyze the chemical oxidation demand(COD), ammoniacal nitrogen(NH3-N) and phosphate(PO43-). The concentration of proteins and carbohydrates was measured using Bradford method and phenol-sulfuric acid method, respectively. The COD of the synthetic wastewater was reduced from(180.5 ± 5.6) ppm to(82 ± 2.6) ppm due to nutrient uptake by microalgae. Then, the Ag/GO-PVDF membrane was used to further purify the microalgae cultivated wastewater, resulting in a low COD permeate of(31 ± 4.6) ppm. The high removal rate of proteins(100%) and carbohydrates(86.6%) as the major foulant in microalgae filtration, with low membrane fouling propensity of Ag/GO-PVDF membrane is advantageous for the sustainable development of the microalgae production. Hence, the integrated A-MPR system is highly recommended as a promising approach for microalgae cultivation and wastewater polishing treatment.

关键词： Algal-membrane photoreactor Nanohybrid membrane Wastewater polishing Microalgal cultivation Nutrient recovery

来源：评论

学校读者我要写书评

暂无评论

Development of Brunei regional hydrodynamic model for modelling of Brunei coastal waters using Delft3D

引用

AIP Conference Proceedings 2023年第1期2643卷

作者： Rama Rao Karri Dk Nur Siti Fatimah Ena Kartina Abdul Rahman Hj Asari Bin Hj Abdul Rashid Uditha Rohana Ratnayake 1Petroleum and Chemical Engineering Faculty of Engineering Universiti Teknologi Brunei Jalan Tungku Link BE1410 Gadong Brunei Darussalam 2Civil Engineering Programme Area Faculty of Engineering Universiti Teknologi Brunei Jalan Tungku Link BE1410 Gadong Brunei Darussalam

The Brunei coastline represents a diverse multi-use coastal zone ranging from the production of oil & gas to recreational uses. Brunei Maura port is also considered as an alternative stopover for docking cargo and oil carrying ships, owing to the fact that the nearby docking port in this region (Singapore) is very busy. This facility provides extensive economic benefits to this region to develop infrastructure facilities for these navigation ships. A robust hydrodynamic model is needed to better understand the processes and reproducing the driving mechanisms of these large-scale driven flows in Brunei waters. Since there is no hydrodynamic model available in this region, so a regional model covering the sea coast of Brunei is developed, which is termed the Brunei Regional Hydrodynamic Model (BRHM). This model covers a coastline extending from Miri to Kota Kinabalu, which is on either side of the Brunei Sea coast. The hydrodynamic model is calibrated using the satellite data available in this region. This calibrated model can be further used for simulating the typical and extreme scenarios of storm surges at the South China Sea (SCS) and their effects on the local hydrodynamics, which in turn affect the navigation and ecosystem in Brunei Bay. This research study which is the first of its kind in this region, will demonstrate the nonlinear tidal interactions and storm surges in SCS. This study also helps us to understand the tide-bathymetry/geometry interactions that cause frequent sea level anomalies in this region. This well-calibrated hydrodynamic model will form the benchmark to simulate the typical and extreme scenarios of storm surges at SCS and their effects on the local hydrodynamics, which in turn affect the navigation and ecosystem in Brunei Bay. This research study will extensively support the Brunei Darussalam national vision to make Maura port a Service Hub for Trade and Tourism by providing efficient shipping, ports, value-added services and infrastructu

关键词：

来源：评论

学校读者我要写书评

暂无评论

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案：

请选择收藏分类：

通借通还

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：