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Modification of Polypropylene Fibrous Filters with Mtms-Based Aerogel for Improvement of Oil Mist Separation Properties – Experimental and Theoretical Study

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SSRN 2022年

作者： Nowak, Bartosz Bonora, Marta Gac, Jakub M. Faculty of Chemical and Process Engineering Warsaw University of Technology Waryńskiego 1 Warsaw00-645 Poland GVS Filter Technology Via Roma 5040069 Zola Predosa Bologna Italy

Air containing dispersed oil phase occurs in machining and cutting operations, engine closed crankcase ventilation and compressed gas cleaning. The significance of this issue stems from the fact that many liquids used in industry are harmful both for humans and other living organisms. Especially droplets in micron and submicron scale can penetrate the respiratory system and are particularly difficult to remove. Gas streams purification from the oil phase is widely carried on standard fibrous filters that need to meet high gas purification degree, so often filter modification is requisite. This work focuses on applying the sol-gel method for modifying polypropylene fibrous filters produced by melt-blown technology. The deposition of aerogel structure on filter fibres intensifies surface phenomena and increase collector surface, thus improving oil filtration efficiency. Methyltrimetoxysilane(MTMS)-based aerogel exhibits hydrophobic and oleophilic, as well as good sorptive properties. Research focuses on filter modification using aerogel structure to improve oil mist separation. © 2022, The Authors. All rights reserved.

关键词： Sol-gels

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Formulation of water-based white colour paint from waste titanium Dioxide 2

Formulation of water-based white colour paint from waste tit...

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2nd Innovative Manufacturing, Mechatronics and Materials Forum, iM3F 2021

作者： Razali, Mohd.Najib Bin Alkaf, Alawi Abdulqader Zuhan, Mohd Khairul Nizam Bin Mohd Faculty of Chemical and Process Engineering Technology Universiti Malaysia Pahang Gambang Pahang 26300 Malaysia Department of Chemical Engineering College of Engineering Universiti Malaysia Pahang Gambang Pahang 26300 Malaysia Mnr Multitech SDN Bhd K02 Ground Floor Kompleks UMP HoldingsGambang Pahang 26300 Malaysia

This work explains the production and synthesis of white paint pigment colour from waste titanium dioxide (TiO2). Pigments are widely employed in paper, plastic, and paint production. A white pigment called TiO2 is responsible for about seventy percent of pigments used today. Even though minerals that contain TiO2 within the earth's crust are relatively abundant, the production of virgin TiO2 for industrial application consumes enormous energy and can lead to an environmental problem. Hence, a need arises for the paint industry to seek an alternative to replacing virgin TiO2 pigment that is commonly utilised in formulating paints. This study was conducted to examine the probability of using secondary TiO2 pigments as an alternative to virgin pigments to formulate white paint from industrial waste. In this study, the prospect of using waste TiO2 to formulate white paint pigment in different ratios is compared with the paint industry. The paint industry and TiO2 pigments were characterised by utilising thermo quantitative analysis TGA, XRD, and FTIR analysis. The obtained result showed 20% TiO2 formulated paint provide the best result for the adhesion test that testify the optimum pH and viscosity for the paint with the classification of 3B which is comparable to paint industry performance. Copyright 2021 Elsevier Ltd. All rights reserved.

关键词： Titanium dioxide

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Facet-Controlled LiMn_(2)O_(4)/C as Deionization Electrode with Enhanced Stability and High Desalination Performance

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Nano-Micro Letters 2022年第11期14卷 75-86页

作者： Yuxin Jiang Liyuan Chai Dehe Zhang Fangping Ouyang Xiangyuan Zhou Sikpaam IAlhassan Sailin Liu Yingjie He Lvji Yan Haiying Wang Wenchao Zhang School of Metallurgy and Environment Central South UniversityChangsha 410083People’s Republic of China Chinese National Engineering Research Center for Control and Treatment of Heavy Metal Pollution Changsha 410083People’s Republic of China Water Pollution Control Technology Key Lab of Hunan Province Changsha 410083People’s Republic of China School of Physics and Electronics Hunan Key Laboratory for Super-Microstructure and Ultrafast Processand Hunan Key Laboratory of Nanophotonics and DevicesCentral South UniversityChangsha 410083People’s Republic of China State Key Laboratory of Powder Metallurgy and Powder Metallurgy Research InstituteCentral South UniversityChangsha 410083People’s Republic of China School of Chemical Engineering and Advanced Materials Faculty of SciencesEngineering and TechnologyThe University of AdelaideAdelaide 5005Australia

Battery materials as emerging capacitive deionization electrodes for desalination have better salt removal capacities than traditional carbon-based ***_(2)O_(4),a widely used cathode mate-rial,is difficult to utilize as a deionization electrode due to its structural instability upon cycling and Mn dissolution in aqueous-based ***,a facile and low-cost ball-milling routine was proposed to prepare a LiMn_(2)O_(4)material with highly exposed(111)*** prepared electrode exhibited relatively low dissolution of Mn during cycling,which shows its long cycle *** the hybrid capacitive deionization system,the LiMn_(2)O_(4)/C electrode delivered a high desalination capacity of 117.3 mg g^(−1) without obvious capacity decay at a voltage of 1.0 V with a 20 mM initial salt *** addition,the exposed(111)facets significantly alleviated Mn ion dissolution,which also enhanced the structural steadiness.

关键词： Deionization electrode Desalination Lithium-ion battery

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Ni-Mo2C/γ-Al2O3 catalysts for syngas production in pyrolysis-dry reforming of plastics - the effect of amine nature on catalyst performance

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SSRN 2024年

作者： Pawelczyk, Ewelina Frąckiewicz, Izabela Gil, Antonio Karczewski, Jakub Maciejewski, Michal E. Gębicki, Jacek Department of Process Engineering and Chemical Technology Faculty of Chemistry Gdansk University of Technology Narutowicza 11/12 St. Gdansk80-233 Poland INAMAT^2 Science Department Los Acebos Building Public University of Navarra Campus of Arrosadia PamplonaE-31006 Spain Faculty of Applied Physics and Mathematics Institute of Nanotechnology and Materials Engineering Gdansk University of Technology Narutowicza 11/12 St. Gdansk80-233 Poland Spain

Pyrolysis combined with dry reforming (PCDR) is eco-friendly technology for plastic waste management, allowing for sustainable production of syngas. Design of suitable catalysts with high performance and stability is crucial for its industrialization. In this work, Ni-Mo2C/γ-Al2O3 catalysts were synthesized using organic-inorganic precursors. Three types of amines (hexylamine - aliphatic linear, cyclohexylamine - aliphatic cyclic, aniline - aromatic) were used as carbon source in the precursor preparation to investigate their effect on catalyst physicochemical properties and its catalytic performance. Catalytic performance of the obtained catalysts was examined in PCDR of model waste plastic mixture. It was revealed that catalytic activity of catalysts prepared with aliphatic amines was higher compared to aromatic aniline, amine commonly used for carbide synthesis. The differences in catalyst properties, which affected their catalytic activity were characterized using N2-adsorption at -196 ºC, XRD, H2-TPR, SEM, TG/DTG and CO2-adsorption methods. A correlation was observed between amine molecule complexity and Mo2C crystallite size, significantly affecting hydrogen generation. The less complex the amine, the smaller the crystallite and the increased hydrogen production. Moreover, the use of aliphatic amines resulted in the stronger Ni-support interactions, the increased number of more favorable, larger mesopores as well as the presence of the metallic Mo phase and the lack of unbound carbon in contrast to the catalyst obtained using aniline. The catalyst synthesized using hexylamine increased H2 yield by more than tenfold, syngas yield by more than threefold, and the H2/CO ratio by fivefold, which offers an opportunity for future industrialization of PCDR. © 2024, The Authors. All rights reserved.

关键词： Crystallite size

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Membrane support formulation and carrier selection in supported liquid membrane for extraction of zwitterionic form of Glutamic acid

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Materials Today: Proceedings 2021年 41卷 116-121页

作者： Vikneswary Rajendaren Syed M. Saufi M.A.K.M. Zahari Abdul Wahab Mohammad Department of Chemical Engineering College of Engineering Universiti Malaysia Pahang Lebuhraya Tun Razak 26300 Gambang Pahang Malaysia Faculty of Chemical and Process Engineering Technology College of Engineering Technology Universiti Malaysia Pahang Lebuhraya Tun Razak 26300 Gambang Pahang Malaysia Department of Chemical and Process Engineering Faculty of Engineering and Built Environment Universiti Kebangsaan Malaysia 43600 Bangi Selangor Darul Ehsan Malaysia

Glutamic acid (GA) is an amino acid which is usually appear in the zwitterionic form in solutions. At present, cation and anion exchange carriers are widely use to extract this amino acids. However, the carriers only function either at high pH or low pH. Although, the pH can be adjusted by adding certain chemical to reach acidic or basic region, but it may lead to additional byproducts formation and affect the extraction process. In the current study, supported liquid membrane (SLM) was used to extract the zwitterionic form of GA from the aqueous solution without any pH adjustment. In the SLM process, the determination of the best carrier in liquid membrane formulation is important for achieving high extraction of GA. Hence, different types of carriers such as trioctylamine (TOA), tridodecylamin (TDA), tri-n-octyl phosphine oxide (TOPO), mixture of 50% TOA and 50% TDA, aliquat 336 and di-2-ethylhexyl phosphoric acid (D2EHPA) in 2-ethyl-1-hexanol were investigated. The polyethersulfone (PES) membrane with and without graphene membrane supports were prepared, characterized and used as the support in the SLM. The incorporation of graphene in PES membrane had increased the surface contact angle and tensile stress from 80.96 ± 1.92° to 97.8 ± 1.46° and 650.684 kPa to 1079.59 kPa, respectively. Aliquat 336 was identified as the best carrier with 93% of GA extraction.

关键词： Glutamic acid Isoelectric condition Supported liquid membrane Carriers Liquid extraction

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Conducting Polymers Meet Lithium-Sulfur Batteries:Progress,Challenges,and Perspectives

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Energy & Environmental Materials 2023年第5期6卷 159-182页

作者： Xin Chen Chengcheng Zhao Kai Yang Shiyi Sun Jinxin Bi Ningrui Zhu Qiong Cai Jianan Wang Wei Yan Department of Environmental Science and Engineering State Key Laboratory of Multiphase Flow in Power EngineeringXi'an Jiaotong UniversityXi'an 710049China Xi'an Key Laboratory of Solid Waste Recycling and Resource Recovery Department of Environmental EngineeringXi'an Jiaotong UniversityXi'an 710049China Advanced Technology Institute University of SurreyGuildfordSurrey GU27XHUK College of Arts College of Landscape Architecture Fujian Agriculture and Forestry UniversityFuzhou 350108China Department of Chemical&Process Engineering Faculty of Engineering and Physical Sciences University of SurreyGuildford GU27XHUK

Lithium-sulfur(Li-S)batteries have attracted increased interest because of the high theoretical energy density,low cost,and environmental *** polymers(CPs),as one of the most promising materials used in Li-S batteries,can not only facilitate electron transfer and buffer the large volumetric change of sulfur benefiting from their porous structure and excellent flexibility,but also enable stronger physical/chemical adsorption capacity toward polysulfides(LiPSs)when doped with abundant heteroatoms to promote the sulfur redox kinetics and achieve the high sulfur *** review firstly introduces the properties of various CPs including structural CPs(polypyrrole(PPy),polyaniline(PANi),polyethylene dioxothiophene[PEDOT])and compound CPs(polyethylene oxide(PEO),polyvinyl alcohol(PVA)and poly(acrylic acid)[PAA]),and their application potential in Li-S ***,the research progress of various CPs in different components(cathode,separator,and interlayer)of Li-S batteries is systematically ***,the application perspective of the CPs in Li-S batteries as a potential guidance is comprehensively discussed.

关键词： conducting polymers Li-S batteries modified materials polysulfides

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D-Xylonic Acid from Recombinant E. coli BL21 (DE3): Comparison between Shake Flask and Benchtop Bioreactor Fermentation 2

D-Xylonic Acid from Recombinant E. coli BL21 (DE3): Comparis...

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2nd Joint International Conference on Emerging Computing technology and Sports, JICETS 2019

作者： Rodzri, N.A.M. Zain, W.S.W.M. Hanapiah, R.M.A. Samah, R.A. Illias, R.M. Faculty of Chemical and Process Engineering Technology Universiti Malaysia Pahang Gambang Pahang26300 Malaysia Faculty of Chemical and Energy Engineering Universiti Teknologi Malaysia Skudai Johor81310 Malaysia

Production D-xylonic acid from recombinant E. coli BL21 (DE3) at a small scale has been successfully done several times. In an attempt to scale up the production process to a bigger scale, fermentation in bioreactor was conducted. The comparison on growth of recombinant E. coli BL21 (DE3) and production of D-xylonic acid in both shake flask and bioreactor was investigated. Higher specific growth rate of recombinant E. coli BL21 (DE3) and concentration of D-xylonic acid however, was obtained by fermentation in shake flask which is 0.273 h-1 and 9.06 gL-1 D-xylonic acid respectively. The result suggests several mistakes done during fermentation in bioreactor that causes low concentration of D-xylonic acid in bioreactor fermentation. Therefore, this calls up for improvement and better scale-up strategies in future work. © 2020 IOP Publishing Ltd. All rights reserved.

关键词： Fermentation

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Evaluation of Oxidative and Thermal Stability of Base Oil for Automotive Application

Evaluation of Oxidative and Thermal Stability of Base Oil fo...

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Innovative Manufacturing, Mechatronics and Materials Forum, iM3F 2021

作者： Mohd Ramli, Najmuddin Mahmud, Mohd Sabri Mohd Zuhan, Mohd Khairul Nizam Musa, Musfafikri Razali, Mohd Najib Faculty of Chemical & Process Engineering Technology Universiti Malaysia Pahang Pahang Gambang26300 Malaysia Department of Chemical Engineering Universiti Malaysia Pahang Pahang Gambang26300 Malaysia MNR Multitech Sdn. Bhd. K02 Ground Floor Kompleks UMP Holdings Pahang Gambang26300 Malaysia Pusat Pengajian Diploma Universiti Tun Hussein Onn Hab Pendidikan Tinggi Pagoh KM1 Jalan Panchor Johor Pagoh Malaysia

ISBN: (纸本)9789811928895

Base oils make up the majority of the content of engine oils and substantially impact the overall performance of the finished lubricant product. The oxidative and thermal stability of the base oil are critical factors in defining the quality of automobile lubricating oil. Thus, it is critical to understand the degrading behavior of base oils and engine oils. The oxidative and thermal stability of several base oils and engine oil were thoroughly investigated in this study. Three distinct types of base oil (base 1, 2 and 3) and motor oil were produced and physically characterized. The samples were dried in a drying oven at atmospheric pressure and 150 ℃ for 24 h. The impact of heat treatment on the samples’ oxidative stability was investigated using a Fourier Transform Infrared Spectrometer (FTIR). The thermogravimetric analysis was used to determine the samples’ thermal stability (TGA). The study was done in an inert atmosphere using nitrogen gas and a 10 ℃ min−1 heating rate from 30 to 900 ℃. The experimental results indicate that base oils and engine oil resisted oxidation since no apparent chemical structural alteration was seen following 24-h heat treatment. Meanwhile, engine oil demonstrated the most outstanding onset temperature of 298 ℃, followed by base oil three (276 ℃), base oil two (275 ℃), and base oil one (262 ℃). Additionally, the TGA profile revealed that engine oil had the highest thermal stability at 5, 50, and 90% weight loss. Base oil three, base oil two, and base oil one all followed this pattern. Nonetheless, further research is necessary to better understand the mechanisms at action and assist in creating an industry-specific optimal solution. © 2022, The Author(s), under exclusive license to Springer Nature Singapore Pte Ltd.

关键词： Thermodynamic stability

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Polysaccharide nanocomposites in wastewater treatment: A review

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Chemosphere 2024年 347卷 140578页

作者： Al-Hazmi, Hussein E. Luczak, Justyna Habibzadeh, Sajjad Hasanin, Mohamed S. Mohammadi, Ali Esmaeili, Amin Kim, Seok-Jhin Khodadadi Yazdi, Mohsen Rabiee, Navid Badawi, Michael Saeb, Mohammad Reza Department of Sanitary Engineering Faculty of Civil and Environmental Engineering Gdańsk University of Technology Gdańsk80-233 Poland Department of Process Engineering and Chemical Technology Faculty of Chemistry Gdańsk University of Technology Gdańsk80-233 Poland Tehran Iran Cellulose and Paper Department National Research Centre Cairo Dokki12622 Egypt Department of Engineering and Chemical Sciences Karlstad University Karlstad65188 Sweden Department of Chemical Engineering School of Engineering Technology and Industrial Trades College of the North Atlantic—Qatar Doha Qatar School of Chemical Engineering Oklahoma State University StillwaterOK74078 United States Division of Electrochemistry and Surface Physical Chemistry Faculty of Applied Physics and Mathematics Gdańsk University of Technology Narutowicza 11/12 Gdańsk80-233 Poland Centre for Molecular Medicine and Innovative Therapeutics Murdoch University PerthWA6150 Australia School of Engineering Macquarie University SydneyNSW2109 Australia Université de Lorraine CNRS L2CM F-57000 Metz France Department of Pharmaceutical Chemistry Medical University of Gdańsk J. Hallera 107 Gdańsk80-416 Poland

In modern times, wastewater treatment is vital due to increased water contamination arising from pollutants such as nutrients, pathogens, heavy metals, and pharmaceutical residues. Polysaccharides (PSAs) are natural, renewable, and non-toxic biopolymers used in wastewater treatment in the field of gas separation, liquid filtration, adsorption processes, pervaporation, and proton exchange membranes. Since addition of nanoparticles to PSAs improves their sustainability and strength, nanocomposite PSAs has gained significant attention for wastewater treatment in the past decade. This review presents a comprehensive analysis of PSA-based nanocomposites used for efficient wastewater treatment, focusing on adsorption, photocatalysis, and membrane-based methods. It also discusses potential future applications, challenges, and opportunities in adsorption, filtration, and photocatalysis. Recently, PSAs have shown promise as adsorbents in biological-based systems, effectively removing heavy metals that could hinder microbial activity. Cellulose-mediated adsorbents have successfully removed various pollutants from wastewater, including heavy metals, dyes, oil, organic solvents, pesticides, and pharmaceutical residues. Thus, PSA nanocomposites would support biological processes in wastewater treatment plants. A major concern is the discharge of antibiotic wastes from pharmaceutical industries, posing significant environmental and health risks. PSA-mediated bio-adsorbents, like clay polymeric nanocomposite hydrogel beads, efficiently remove antibiotics from wastewater, ensuring water quality and ecosystem balance. The successful use of PSA-mediated bio-adsorbents in wastewater treatment depends on ongoing research to optimize their application and evaluate their potential environmental impacts. Implementing these eco-friendly adsorbents on a large scale holds great promise in significantly reducing water pollution, safeguarding ecosystems, and protecting human health. © 2023 The

关键词： Wastewater treatment

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Vatica rassak wood waste-derived activated carbon for effective Pb(II) adsorption: Kinetic, isotherm and reusability studies

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Materials Today: Proceedings 2021年 42卷 165-171页

作者： C.Q. Teong H.D. Setiabudi N.A.S. El-Arish M.B. Bahari L.P. Teh Faculty of Chemical and Process Engineering Technology College of Engineering Technology Universiti Malaysia Pahang Lebuhraya Tun Razak 26300 Gambang Kuantan Pahang Malaysia Department of Chemical Sciences Faculty of Science and Technology Universiti Kebangsaan Malaysia 43600 UKM Bangi Selangor Malaysia

Vatica Rassak wood waste-derived activated carbon (AC VRW ) was employed for lead (Pb(II)) adsorption. Batch adsorption tests were executed to investigate the influences of contact time ( t  = 0–60 min), AC VRW dosage ( m  = 0–5 g L -1 ), initial pH (pH = 2–10), and initial Pb(II) concentration ( C o  = 10–200 mg L -1 ) towards Pb(II) elimination. The best adsorption conditions were found at t  = 55 min, pH = 6, and m  = 2 g L -1 , with optimal Pb(II) uptake of 149.25 mg g −1 . The equilibrium data demonstrated high linearity with the pseudo-second-order kinetic model as well as the Langmuir isotherm model. The characterization results showed the vital role of AC VRW ’s physicochemical properties in the Pb(II) adsorption process. It is observed that the surface of the adsorbent after adsorption became ruptured and many fine particles attached on it. Moreover, the pore size of the adsorbent also decreased after adsorption. The practicability of AC VRW was verified by its excellent performance in the reusability study with slight reduction in Pb(II) removal of 10.72% after five cycles. This study proved that AC VRW possessed significant features to be employed as a low-cost activated carbon for the elimination of Pb(II).

关键词： Pb(II) elimination Adsorption Lead Wood waste Activated carbon

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