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Nanocellulose from oil palm mesocarp fiber using hydrothermal treatment with low concentration of oxalic acid

Materials Today: Proceedings 2022年 48卷 1899-1904页

作者： N.F. Abu Bakar N. Abd Rahman M.B. Mahadi S.A. Mohd Zuki K.N. Mohd Amin M.Z. Wahab I. Wuled Lenggoro School of Chemical Engineering College of Engineering Universiti Teknologi MARA 40450 Shah Alam Selangor Malaysia Faculty of Chemical and Process Engineering Technology Universiti Malaysia Pahang Lebuh Raya Tun Razak Gambang Pahang 26300 Malaysia B4 Bangunan Kilang Tabung Haji Jalan Gebeng 3/2 Kawasan Industri Gebeng 26080 Kuantan Pahang Malaysia Graduate School of Bio-Applications and Systems Engineering Tokyo University of Agriculture and Technology (TUAT) 2-24-16 Naka-cho Koganei-shi Tokyo 184-8588 Japan Department of Applied Physics and Chemical Engineering TUAT 2-24-16 Naka-cho Koganei-shi Tokyo 184-8588 Japan Institute of Global Innovation Research TUAT 3-8-1 Harumi-cho Fuchu-shi Tokyo 183-8538 Japan

Nanocellulose from oil palm mesocarp fiber (OPMF) was isolated using hydrothermal treatment at a pressure of 150 kPa and 120 °C coupled with hydrolysis of low concentration of weak acid i.e. oxalic acid dihydrate (OAD). Two different concentrations of OAD i.e. 11 and 13 wt% were introduced in the acid hydrolysis process. Crystallinity index of the raw fiber increased from 39.5 to 70.4 and 70% for 11 and 13 wt% OAD, respectively. The average particles sizes of nanocellulose measured using TEM was approximately 25 nm for both concentrations of OAD which approximately equivalent to the one measured using dynamic light scattering (DLS). The values of zeta potential of the nanocellulose suspension isolated using 11 and 13 wt% OAD were −26 and −27.5 mV respectively. Isolation technique which is hydrothermal treatment coupled with low concentration of OAD was effective in producing OPMF nanocellulose at high crystallinity index, less than 100 nm size distribution, and it is a stable suspension.

关键词： Hydrothermal treatment Oil palm mesocarp fiber Oxalic Acid Dihydrate Nanocellulose

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Corrigendum to "Investigating the stability of chimeric murine polyomavirus VP1 Capsomeres via molecular dynamics simulations and experimental analysis" [Int. J. Biol. Macromol., volume 286, January 2025, 138372]

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International journal of biological macromolecules 2025年 303卷 140511页

作者： Hong Luo Yanyan Ma Zhiguo Su Yanhao Gu Songping Zhang Lukas Gerstweiler School of Chemical Engineering Faculty of Science Engineering and Technology University of Adelaide Adelaide 5005 Australia State Key Laboratory of Biochemical Engineering Key Laboratory of Biopharmaceutical Preparation and Delivery (CAS) Institute of Process Engineering Chinese Academy of Sciences Beijing 100190 PR China Institute of Pharmaceutical and Food Engineering Shanxi University of Chinese Medicine Jinzhong 030619 PR China. State Key Laboratory of Biochemical Engineering Key Laboratory of Biopharmaceutical Preparation and Delivery (CAS) Institute of Process Engineering Chinese Academy of Sciences Beijing 100190 PR China. School of Chemical Engineering Faculty of Science Engineering and Technology University of Adelaide Adelaide 5005 Australia. School of Chemical Engineering Faculty of Science Engineering and Technology University of Adelaide Adelaide 5005 Australia. Electronic address: lukas.gerstweiler@adelaide.edu.au.

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Crafting the future: Enhancing gas separation with nanoarchitectonics of bimetallic Ni–Co-ZIF-67 in polysulfone-based mixed matrix membranes

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Case Studies in chemical and Environmental engineering 2024年 9卷

作者： Sulistiono, Dety Oktavia Ali, Badrut Tamam Ibnu Widyanto, Alvin Rahmad Ediati, Ratna Widiastuti, Nurul Lestari, Witri Wahyu Akhlus, Syafsir Iqbal, Rendy Muhamad Senda, Semuel Pati Fansuri, Hamzah Department of Chemistry Faculty of Science and Data Analytics Institut Teknologi Sepuluh Nopember Sukolilo Surabaya 60111 Indonesia Automotive Engineering Engineering Department Politeknik Negeri Jember Jember 68101 Indonesia Center for Process and Manufacturing Industry Technology National Research and Innovation Agency Technology Energy Cluster PUSPIPTEK 625 Building South Tangerang Indonesia Department of Applied Chemistry Shibaura Institute of Technology 3-7-5 Toyosu Koto-ku Tokyo 135-8548 Japan Department of Chemistry Faculty of Mathematics and Natural Sciences Universitas Sebelas Maret Jl. Ir. Sutami No. 36A Kentingan Jebres Surakarta 57126 Indonesia Department of Chemistry Faculty of Mathematics and Natural Sciences Universitas Palangka Raya Kampus UPR Tunjung Nyaho Palangkaraya 73111 Indonesia Advanced Membrane Technology Research Center (AMTEC) Faculty of Chemical and Energy Engineering Universiti Teknologi Malaysia Johor Skudai 81310 Malaysia

In response to global clean energy demands, this study develops mixed matrix membranes (MMMs) for gas separation in renewable energy applications. MMMs are produced through phase inversion by employing polysulfone and bimetallic-ZIF (Ni–Co-ZIF-67). Bimetallic-ZIF, formed in-situ by Co and Ni metals in water solvent with triethylamine, enhances gas selectivity. MMMs with 4 wt% bimetallic-ZIF, Co: Ni ratio of 9:1 (4Ni10Z67), exhibit remarkable selectivity: CO₂/CH₄ (21.19), H₂/N₂ (1.47), H₂/CH₄ (44.82), and N₂/CH₄ (30.40). Strong interactions between bimetallic-ZIF and CO₂, facilitated by molecular sieving and Ni–Co sites, contribute to these results. © 2024 The Authors

关键词： Bimetallic-ZIF CO2 capture Gas emissions Metal substitution Renewable energy

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Maximization of generated electric power in the TEG module at various heat exchange conditions

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chemical and process engineering - Inzynieria Chemiczna i Procesowa 2020年第4期41卷 277-291页

作者： Poświata, Artur Gierycz, Pawel Warsaw University of Technology Faculty of Chemical and Process Engineering ul. Waryńskiego 1 Warsaw00-645 Poland

Thermoelectric generators using the Seebeck effect to generate electricity are increasingly used in various areas of human activity, especially in cases where a cheap high-temperature heat source is available. Despite many advantages, TEG generators have one major disadvantage: very low efficiency of heat conversion into electrical power which strongly depends on the applied load resistance. There is a maximum of generated power between the short and the open circuit in which it is zero. That is why optimization of TEG modules is particularly important. In this paper a method of maximization of generated power in a single TEG module is presented for two cases. The first case concerns a problem with fixed heat flux flow into the hot side of the module whereas the second one concerns a problem with fixed heat transfer parameters in hot heat exchanger i.e. supply gas temperature and heat transfer coefficient. A number of optimization results performed for various values of these parameters are presented and discussed. © 2020 Polish Academy of Sciences. All rights reserved.

关键词： Heat flux

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NaBiS2 as a Next-Generation Photovoltaic Absorber

NaBiS2 as a Next-Generation Photovoltaic Absorber

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IEEE Conference Photovoltaic Specialists (PVSC)

作者： Yi-Teng Huang Seán R. Kavanagh Marcello Righetto Marin Rusu Igal Levine Thomas Unold Szymon J. Zelewski Alexander J. Sneyd Kaiwen Zhang Linjie Dai Andrew J. Britton Junzhi Ye Jaakko Julin Mari Napari Zhilong Zhang James Xiao Mikko Laitinen Laura Torrente-Murciano Samuel D. Stranks Akshay Rao Laura M. Herz David O. Scanlon Aron Walsh Robert L. Z. Hoye Cavendish Laboratory University of Cambridge Cambridge UK Department of Chemistry University College London London UK Department of Materials Imperial College London London UK Thomas Young Centre University College London London UK Department of Physics University of Oxford Clarendon Laboratory Oxford UK Helmholtz-Zentrum Berlin für Materialien und Energie GmbH Berlin Germany Department of Semiconductor Materials Engineering Faculty of Funda-mental Problems of Technology Wroclaw University of Science and Technology Wroclaw Poland Department of Chemical Engineering and Biotechnology University of Cambridge Cambridge UK School of Chemical and Process Engineering University of Leeds Leeds UK Department of Physics University of Jyvaskyla Jyvaskyla Finland School of Electronics and Computer Science University of Southampton Southampton UK Institute for Advanced Study Technical University of Munich Garching Germany

ISBN: (数字)9781665464260

ISBN: (纸本)9781665475822

$\mathbf{I}-\mathbf{V}-\mathbf{VI}_{2}$ ternary chalcogenides were gaining more attention recently owing to their high air stability along with earth-abundant and nontoxic compounds. More interestingly, some of them have been predicted to be potential “perovskite-inspired materials” that can exhibit defect tolerance. In this work, we investigated the optoelectronic properties of cation-disordered $\mathbf{NaBiS}_{2}$ nanocrystals, which have a steep absorption onset, with absorption coefficients $> \mathbf{10}^{5} \ \mathbf{cm}^{-1}$ just above its pseudo-direct bandgap of 1.4 eVe Surprisingly, an ultrafast photoconductivity decay and long-lived charge-carrier population almost independent of defect densities were simultaneously observed in N aBiS2 nanocrystals. Through the density functional theory calculations, these unusual features are found to be highly associated with the non-bonding $\mathbf{S} \ {p}$ orbitals above the upper valence band, which can be further enhanced by cation inhomogeneity. Our work hence reveals the critical role of cation disorder on both absorption characteristics and charge-carrier kinetics of $\mathbf{I}-\mathbf{V}-\mathbf{VI}_{2}$ ternary chalcogenides.

关键词： Photovoltaic systems Couplings Chalcogenides Absorption Nanocrystals Photonic band gap Orbits Optical materials Ultrafast optics Photoconductivity

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Effect of different extraction solvents to the chemical profiles of Ziziphus mauritiana leaves extract

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AIP Conference Proceedings 2024年第1期3023卷

作者： Siti U. Mokhtar Muhammad S. F. Shamsuddin Fathul A. Fahmi Raihana Z. Edros Faculty of Industrial Science and Technology Universiti Malaysia Pahang Lebuh Persiaran Tun Khalil Yaakob 26300 Kuantan Pahang Malaysia Faculty of Chemical & Process Engineering Technology Universiti Malaysia Pahang Lebuh Persiaran Tun Khalil Yaakob 26300 Kuantan Pahang Malaysia

Ziziphus Mauritiana or known as Bidara in Malaysia is one of the medicinal plants that recognized for their nutritional values. However, the research study and knowledge on the benefit of Ziziphus Mauritiana leaves are still inadequate and this plant was categorized in underutilized plant in Malaysia. The current study has been aimed to investigate the effect of different extraction solvent used to percentage yield of the extract as well as the chemical profiles of Ziziphus mauritiana leaves extract. The extraction was carried out using a Soxhlet extraction technique, and the impact of varies extraction solvents (methanol, ethanol and acetone) with a sample-to-solvent ratio of 1:20 were studied. Based on the finding, ethanolic extract has the highest percentage yield which is 21.57% compared to methanol (17.69%) and acetone (3.49%). An advanced high resolution method which is Liquid Chromatography Quadrupole Time of Flight Mass Spectrometry (LC-QTOFMS) was implemented to explore the chemical profiles of these extracts such as alkaloids, phenolic, flavonoid and tannins. Based on the analysis, methanolic extract successfully obtained the highest number of constituents compared to other extraction solvents which 58 alkaloids, 49 phenolic and 18 flavonoid compounds. In ethanolic extract, 28 alkaloids, 20 phenolics and 15 flavonoid compounds were detected by this method. Meanwhile, acetone extract revealed the lowest identified compounds which are 18 alkaloids, 4 phenolic and 1 flavonoid. These results showed that more than 100 compounds were detected in all extracts and each extract revealed different number of bioactive compounds present. In fact, the chemical profiling showed significant difference of phytochemical compounds that presence in polar extract (methanolic and ethanolic) compared to acetone extract. It depicted that the polarity of the solvent used is the main parameter to successfully extract the highest amount of compounds in the extract. Therefore, this

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Degradation and water absorbency properties of cellulose nanocrystals reinforced natural rubber

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AIP Conference Proceedings 2025年第1期3266卷

作者： Mohd Shaiful Zaidi Mat Desa Tan Jie Sie Sarmila Sivakumar Mohd Bijarimi Mat Piah Masleeyati Yusop Faculty of Chemical and Process Engineering Technology Universiti Malaysia Pahang Al-Sultan Abdullah Lebuhraya Persiaran Tun Khalil Yaakob 26300 Gambang Pahang Malaysia Physics Department Faculty of Science Universiti Teknologi Malaysia 81310 UTM Johor Malaysia

Natural rubber latex (NRL) is one of important materials in various engineering product. However, its low tensile strength and water absorbency properties limits its application. The use of cellulose nanocrystal (CNC) is one of promising strategy to improve NRL tensile strength. However limited studies were done to study its effect towards water absorbency and degradation behavior. The objective of this research is to analyze the mechanical properties, degradation and water absorbency properties of NRL/CNC. CNC can be extracted from cellulose through sulfuric acid hydrolysis. The cnc/nrl composite were fabricated using solution mixing techniques with four different percentage of CNC filler of 0 wt%, 0.5 wt%, 1.0 wt% and 3.0 wt%. Every formulation samples were then cut into dog bone shape according to ASTM D-412 and tested with universal tensile machine for tensile strength and gravimetric method for water absorbency. Morphology analysis was carried out on the best composition of NRL/CNC to observe the surface of the nanocomposites through Scanning Electron Microscopy (SEM). From the experiment result, 0.5 wt% NRL/CNC showed the lowest swelling percentage at 6.06 % and exhibited highest mechanical properties with 7.4529 MPa of ultimate tensile strength. The overall NRL/CNC tensile strength showed that higher percent of CNC added into NRL resulted in weaker tensile strength. This is probably due to agglomeration of CNC at higher percentage which reduces its reinforcement ability.

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Decolorization of victoria blue dye by garbage enzyme from pineapple waste: Remediation efficacy and statistical optimization of fermentation condition

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AIP Conference Proceedings 2024年第1期3014卷

作者： Joyce Cynthia Jalani Zatul Iffah Mohd Arshad Siti Maryam Ahmad Rumaizi Rohaida Che Man Shalyda Md Shaarani Siti Kholijah Abdul Mudalip Siti Zubaidah Sulaiman Faculty of Process and Chemical Engineering Technology Universiti Malaysia Pahang Lebuhraya Persiaran Tun Khalil Yaakob 26300 Gambang Pahang Malaysia Faculty of Industrial Science and Technology Universiti Malaysia Pahang Lebuhraya Persiaran Tun Khalil Yaakob 26300 Gambang Pahang Malaysia

The accumulation of pineapple waste in agricultural industries is a key concern that emerged due to microbial spoilage, foul odor, and costly disposal problems. Therefore, this study exploited the garbage enzyme (GE) converted from the pineapple waste for dye decolorization application. This research was conducted with the objective to screen variables such as, incubation time, temperature, pH, and sonication time, that influenced the fermentation of GE based on protease, amylase, and lipase activities, as well as the dye decolorizing activities. Based on the research, it was demonstrated that the optimum amylase activity was 2192 ± 98 U/mL at 2 days incubation, 37°C, pH 7, and sonication time of 35 minutes. Consequently, for lipase and protease activity, the optimum conditions were achieved at 2 days of incubation at 37°C, pH 7, and 20 minutes of sonication time with activities of 6.39 ± 0.13 U/mL and 0.248 ± 0.006 U/mL, respectively. The decolorization of Victoria Blue (VB) dye at 100 mg/L shows that by 6 hours, it can achieve 50% decolorization and at 48 hours, it can decolorize 90% of the dye. The initial concentration affects the decolorization of the VB as the lower the concentration the higher the decolorization rate. Also, through the decolorization, the pH value will change over time, due to the GE concentration on dye. The FTIR analysis confirmed the biodegradation of Victoria Blue dye by garbage enzyme application.

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Evaluation of a Green-Sustainable Industrialized Cleaner Utilization for Refractory Cyanide Tailings Containing Sulfur

SSRN

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SSRN 2022年

作者： Li, Haoyu Wang, Jun Zhu, Xuejun Yang, Tao Deng, Jun Yan, Beilei Mao, Xuehua Yin, Shaohua Zhang, Yi Li, Shiwei School of Biological and Chemical Engineering Panzhihua University Sichuan Panzhihua617000 China Key Laboratory of Green Chemistry Sichuan Institutes of Higher Education Zigong Sichuan 643033 China Faculty of Metallurgical and Energy Engineering Kunming University of Science and Technology Yunnan Kunming650093 China Sichuan Provincial Key Lab of Process Equipment and Control Sichuan Yibin64404 China Kunming University of Science and Technology China

In order to achieve the clean treatment of refractory cyanide tailings containing sulfur, a novel microwave-assisted chlorination thermal treatment recovery technology was proposed in this paper. On the basis of studying the mineralogy of cyanide tailings, the treatment capacity of common chlorinated agents for refractory cyanide tailings containing sulfur was compared. CaCl2 as the best chlorination agent, gold recovery and chlorine removal rates were 85.2% and 95%, under the optimal conditions. The specific action mechanism of CaCl2 in the process of microwave roasting was studied. Under the action of microwave, CaCl2 accelerated decomposition into chlorine-containing gas and rapidly diffused in cracks caused by thermal stress to ensure gold volatilization and chlorination. Finally, the approach and mechanism of removing residual harmful substances in roasting slag were proposed based on the environmental assessment of roasting slag. Environmental pollution and corrosion of building materials can be effectively avoided in the later transportation and secondary utilization of roasting slag. © 2022, The Authors. All rights reserved.

关键词： Chlorination

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Design and assessment of biolubricant production processes utilizing various feedstocks in palm oil-based biodiesel industry

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Journal of Cleaner Production 2025年 518卷

作者： Thanahiranya, Piyawan Sadhukhan, Jhuma Charoensuppanimit, Pongtorn Vacharanukrauh, Treerat Chuetor, Santi Chanthanumataporn, Merika Assabumrungrat, Suttichai Center of Excellence in Catalysis and Catalytic Reaction Engineering Department of Chemical Engineering Faculty of Engineering Chulalongkorn University Bangkok 10330 Thailand Centre for Environment & Sustainability University of Surrey Guildford Surrey GU2 7XH United Kingdom Department of Chemical and Process Engineering University of Surrey Guildford Surrey GU2 7XH United Kingdom Bio-Circular-Green-economy Technology & Engineering Center (BCGeTEC) Department of Chemical Engineering Faculty of Engineering Chulalongkorn University Bangkok 10330 Thailand Center of Excellence in Particle and Material Processing Technology Department of Chemical Engineering Faculty of Engineering Chulalongkorn University Bangkok 10330 Thailand Department of Chemical Engineering Faculty of Engineering King Mongkut's University of Technology North Bangkok (KMUTNB) Bangkok 10800 Thailand Center of Eco-Materials and Cleaner Technology King Mongkut's University of Technology North Bangkok Bangkok 10800 Thailand

Exploring biolubricant production from renewable resources offers a promising path towards sustainability. Various palm oil derivatives present readily available and versatile feedstocks for biolubricant production. This study investigates the design and evaluation of biolubricant production, specifically trimethylolpropane esters, from various palm oil-based feedstocks derived from the biodiesel industry. The aim is to identify the most suitable feedstock for sustainable biolubricant production. Six feedstocks are evaluated, namely fatty acid methyl esters (FAME), high oleic FAME (HOFAME), palm fatty acid distillate (PFAD), high oleic PFAD (HOPFAD), refined palm oil (RPO), and high oleic palm oil fatty acid (HOPOFA). Economic performance, energy efficiency, and environmental impacts are evaluated and served as process performance indexes. The obtained results based on a biolubricant production capacity of 10,000 tonne per year indicate that HOPFAD is the most suitable feedstock for biolubricant production, demonstrating superior economic viability with a net present value (NPV) of 409 million USD, an internal rate of return (IRR) of 144.6 %, and a payback period (PBP) of 1.81 years. Life cycle assessment results reveal that FAME, HOFAME, PFAD, and HOPFAD provoke similar overall environmental performance, with HOPFAD having only slightly better performance than others. Additionally, the HOPFAD production (6 kg CO2-eq/kg) results in a seven-fold reduction in global warming potential (GWP) compared to conventional mineral oil-based biolubricants. Thus, overall, HOPFAD is recommended for balanced tradeoffs between economic, energy, and environmental performances. © 2025 Elsevier Ltd

关键词： Palm fatty acid distillate Palm oil methyl ester process simulation Refined palm oil Trimethylolpropane ester

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