Article
Green & Sustainable Science & Technology
Mai O. Abdelmigeed, Eslam G. Al-Sakkari, Mahmoud S. Hefney, Fatma M. Ismail, Amr Abdelghany, Tamer S. Ahmed, Ibrahim M. Ismail
Summary: A magnetized zeolitic imidazolate framework (ZIF-8) impregnated with sodium hydroxide catalyst was synthesized for biodiesel production, achieving 70% oil conversion in ethanolysis reaction. The optimized conditions include a 21:1 alcohol to oil molar ratio, 1% wt. catalyst loading, 90 min reaction time, and 75 degrees C temperature, with the product meeting ASTM standards and having a Cetane number of 75.
Article
Chemistry, Multidisciplinary
Yingli Hu, Hao Zhou, Lingmei Dai, Dehua Liu, Sulaiman Al-Zuhair, Wei Du
Summary: The immobilization of Aspergillus niger lipase on macroporous zeolitic imidazolate frameworks (M-ZIF-8) showed higher enzymatic activity, thermal stability, and reusability compared to conventional ZIF-8. Moreover, using ANL@M-ZIF-8 for biodiesel production led to a higher fatty acid methyl ester yield.
Review
Multidisciplinary Sciences
L. Diaz, F. Horstmann, A. Brito, L. A. Gonzalez
Summary: Non-polar oil and polar short-chain alcohols used in the transesterification reaction are not miscible. Co-solvents can be employed to increase miscibility and accelerate the reaction. This review aims to assess the impact of co-solvents on catalyzed methanolysis for biodiesel production. However, the most suitable co-solvents for different methanolysis systems have not been established, and this study aims to justify the different impacts of co-solvents by examining their chemical structures and physicochemical properties.
Article
Energy & Fuels
Reem Al-Mansouri, Wei Du, Sulaiman Al-Zuhair
Summary: Lipase has been successfully encapsulated into ZIF-8 for biodiesel production. The encapsulated lipase showed higher stability compared to the adsorbed one. The highest yield was achieved at specific conditions, but increased methanol ratio and temperature resulted in decreased yield. Diffusion of substrate inside the crystal was limited, affecting the activity of encapsulated lipase.
Article
Engineering, Environmental
Yi Zhang, Xu-Fang Qu, Zhenghua Xu, Hao-Dong Wei, Yong -Wei Feng
Summary: In this study, a metal-organic framework ZIF-8 was explored as an effective catalyst for the transformation and removal of HBQs in darkness. The results showed that HBQs could be transformed within a short period of time and the transformation product could completely disappear within 24 hours in the presence of ZIF-8. In addition, the method demonstrated sustainable removal of HBQs. This study offers a potential approach for the removal of HBQs from disinfected waters.
JOURNAL OF WATER PROCESS ENGINEERING
(2022)
Article
Engineering, Environmental
Xiaoze Wang, Hui Wang, Jiafan Cheng, Hang Li, Xiaofeng Wu, Donghai Zhang, Xinghua Shi, Jingkun Zhang, Ning Han, Yunfa Chen
Summary: Currently, there is an urgent need to develop highly efficient and low-toxicity active antibacterial materials to complement or replace conventional antibiotics and passive antibacterial materials in order to eliminate the growing bacterial contamination. In this study, a series of Cu-doped ZIF-8 materials were successfully prepared and used for disinfection against E. coli and S. aureus bacteria in the absence of light. The results showed that a low dosage of 30 mg mL-1 of 1.35 atomic % Cu doped ZIF-8 achieved a 7 log (99.99999%) efficiency, which was orders of magnitude higher than other analogs. It was also found to have low toxicity. Mechanism investigation revealed that reactive oxygen species (ROS) could be spontaneously generated under darkness, and low-coordinated copper contributed to effective electron transfer for ROS generation, resulting in oxidative stress and membrane damage to bacterial cells, leading to excellent antibacterial properties. These findings demonstrate the potential of Cu-doped ZIF-8 in antibacterial applications, particularly in environments without external energy input.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Nanoscience & Nanotechnology
Fnu Gorky, Jolie M. Lucero, James M. Crawford, Beth Blake, Moises A. Carreon, Maria L. Carreon
Summary: ZIFs have shown potential as efficient catalysts for cold plasma ammonia synthesis, with high ammonia synthesis rates up to 42.16 μmol NH3/min gcat. They exhibit remarkable stability during operation. Additionally, the addition of argon can improve plasma uniformity and energy efficiency.
ACS APPLIED MATERIALS & INTERFACES
(2021)
Review
Thermodynamics
Joshua Iseoluwa Orege, Olayinka Oderinde, Ghebretensae Aron Kifle, Adeola Ahmed Ibikunle, Saheed Abiola Raheem, Onome Ejeromedoghene, Emmanuel Sunday Okeke, Olubunmi Michael Olukowi, Odunola Blessing Orege, Emmanuel Oluwaseyi Fagbohun, Taiwo Oladapo Ogundipe, Esther Praise Avor, Omoyemi Oluwatosin Ajayi, Michael Olawale Daramola
Summary: Heterogeneous catalysis provides a viable alternative for low-cost biodiesel production, and catalytic transesterification is considered the most feasible synthesis method. Nine commonly used heterogeneous catalysts have been studied, with a focus on versatile catalysts with high activity and low production cost.
ENERGY CONVERSION AND MANAGEMENT
(2022)
Article
Chemistry, Multidisciplinary
Xiaoyan Pei, Chunyu Tian, Yanning Wang, Zhenzhen Li, Zhiyan Xiong, Huiyong Wang, Xiantao Ma, Xinhua Cao, Zhiyong Li
Summary: This study presents a CO2-driven reversible transfer of amine-functionalized metal-organic frameworks (ZIF-90) between organics and water. Mechanistic study reveals that the reversible generation of hydrophilic ammonium salts from the reaction of CO2 with the amines on ZIF-90 is responsible for the switching. This unique system has been applied for coupling reactions, product separation, and component recycling, providing a new avenue for green sustainable processes.
CHEMICAL COMMUNICATIONS
(2022)
Review
Energy & Fuels
Indira Tobio-Perez, Yosvany Diaz Dominguez, Lizet Rodriguez Machin, Sven Pohl, Magin Lapuerta, Ramon Piloto-Rodriguez
Summary: Biodiesel production has increasingly shifted towards using heterogeneous catalysts derived from biomass, due to their sustainability, economical and eco-friendly nature, ease of recovery, and the potential to eliminate biomass residues. The review discusses various biomass sources as precursors for heterogeneous catalysts, different methods for preparation, their advantages and drawbacks, as well as their performance in biodiesel production. The use of biomass ash or biochar-based catalysts shows promise in biodiesel synthesis, but requires improvements in catalyst load, reaction time, temperature, and methanol-to-oil ratio.
INTERNATIONAL JOURNAL OF ENERGY RESEARCH
(2022)
Review
Engineering, Environmental
Violeta Makareviciene, Egle Sendzikiene, Ieva Gaide
Summary: Recent studies have shown that microalgae hold potential for use in biodiesel synthesis. The use of heterogeneous catalysts and immobilized enzymes can simplify the synthesis process, reduce costs, and improve ester yields. Parameters such as temperature and molar ratio of alcohol to oil have significant effects on the yield under enzymatic catalysis conditions.
FRONTIERS OF ENVIRONMENTAL SCIENCE & ENGINEERING
(2021)
Article
Green & Sustainable Science & Technology
Wenlei Xie, Chunli Gao, Jiangbo Li
Summary: Efficient and reusable catalysts are desired for improved biodiesel production, and a solid catalyst was successfully developed by incorporating ZIF-8 MOF into Fe3O4 nanoparticles and encapsulating a vanadium-substituted heteropolyacid. The catalyst showed good magnetic responsiveness and achieved simultaneous transesterification of soybean oil and esterification of free fatty acids, with high conversion rates and good reusability.
Article
Environmental Sciences
Danilo Gualberto Zavarize, Jorge Diniz de Oliveira
Summary: The utilization of acai seed residues for the synthesis of acid heterogeneous catalyst proved to be an effective method for converting low free fatty acid waste cooking oil to biodiesel. The catalyst showed high efficiency, thermal stability, and successful conversion rates in experimental tests, outperforming many other biomass-derived catalysts in the literature.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2021)
Article
Green & Sustainable Science & Technology
Ahmad Mukhtar, Sidra Saqib, Hongfei Lin, Mansoor Ul Hassan Shah, Sami Ullah, Muhammad Younas, Mashallah Rezakazemi, Muhammad Ibrahim, Abid Mahmood, Saira Asif, Awais Bokhari
Summary: The traditional method of biodiesel synthesis is costly on an industrial scale, but using heterogeneous catalysis can reduce costs and increase reusability. Heterogeneous catalysts have acid-based, surface, and pore tuning characteristics that enhance process flexibility. Using heterogeneous catalysts allows for simple, safe, cost-effective, and efficient biodiesel production.
RENEWABLE & SUSTAINABLE ENERGY REVIEWS
(2022)
Article
Green & Sustainable Science & Technology
Adeyinka S. Yusuff, Aman K. Bhonsle, Dinesh P. Bangwal, Neeraj Atray
Summary: A highly efficient barium-modified zeolite (Ba-ZEL) catalyst was developed through optimizing thermal treatment temperature, biodiesel production process conditions, and catalyst performance, leading to the maximum biodiesel yield meeting the standard requirements under the optimum conditions.
Article
Polymer Science
N. A. El-Ghamaz, Tamer S. Ahmed, Doaa A. Salama
EUROPEAN POLYMER JOURNAL
(2017)
Article
Engineering, Chemical
Tamer S. Ahmed, Omar Y. Abdelaziz, George W. Roberts
PERIODICA POLYTECHNICA-CHEMICAL ENGINEERING
(2017)
Article
Energy & Fuels
Eslam S. Sbaaei, Tamer S. Ahmed
Article
Multidisciplinary Sciences
Salah H. Bayoumy, Sahar M. El-Marsafy, Tamer S. Ahmed
JOURNAL OF ADVANCED RESEARCH
(2020)
Article
Computer Science, Interdisciplinary Applications
Eslam S. Sbaaei, Mai M. Kamal Fouad, Tamer S. Ahmed
COMPUTERS & CHEMICAL ENGINEERING
(2020)
Article
Green & Sustainable Science & Technology
Mai O. Abdelmigeed, Eslam G. Al-Sakkari, Mahmoud S. Hefney, Fatma M. Ismail, Amr Abdelghany, Tamer S. Ahmed, Ibrahim M. Ismail
Summary: A magnetized zeolitic imidazolate framework (ZIF-8) impregnated with sodium hydroxide catalyst was synthesized for biodiesel production, achieving 70% oil conversion in ethanolysis reaction. The optimized conditions include a 21:1 alcohol to oil molar ratio, 1% wt. catalyst loading, 90 min reaction time, and 75 degrees C temperature, with the product meeting ASTM standards and having a Cetane number of 75.
Article
Energy & Fuels
Salah H. Bayoumy, Sahar M. El-Marsafy, Tamer S. Ahmed
Summary: Oil flow in a circular piping usually requires detailed modeling with correlations to describe its behavior. Ineffective pour point depressants and inefficient heat tracing make oil flow simulation essential. A robust modeling approach is necessary to ensure the integrity of oil flow and avoid additional costs due to varying oil characteristics. This work proposes a coordinated modeling approach using Aspen HYSYS and COMSOL Multiphysics to satisfactory simulate oil flow in a circular pipe. Oil properties extracted from Aspen HYSYS are used in COMSOL Multiphysics to describe varying oil flow characteristics. Computational trials are conducted to estimate oil temperature profiles and compare with an analytical approach using dimensional analysis, showing consistent trends.
PETROLEUM SCIENCE AND TECHNOLOGY
(2023)
Article
Chemistry, Physical
Vahid Rahmanian, Muhammed Ziauddin Ahmad Ebrahim, Seyedamin Razavi, Mai Abdelmigeed, Eduardo Barbieri, Stefano Menegatti, Gregory N. Parsons, Fanxing Li, Tahira Pirzada, Saad A. Khan
Summary: This study presents a novel method for synthesizing metal-organic frameworks (MOFs) on 3D-structured nanofibrous aerogels (NFAs). The resulting hybrid aerogels exhibit promising applications in CO2 adsorption, heavy metal removal, and antibacterial properties.
JOURNAL OF MATERIALS CHEMISTRY A
(2023)
Article
Chemistry, Multidisciplinary
Mai O. Abdelmigeed, Ahmed H. Sadek, Tamer S. Ahmed
Summary: A new Fe3O4/PVP/ZIF-8 nanostructure adsorbent was synthesized and used for the removal of Fosfomycin antibiotic from synthetic pharmaceutical wastewater. The adsorbent showed high adsorption capacity for Fosfomycin and followed the Freundlich isotherm and pseudo-second-order kinetic model.
Article
Multidisciplinary Sciences
Eslam S. Sbaaei, Mai M. Kamal Fouad, Tamer S. Ahmed
Summary: Researchers find that neglecting the time factor in chemical process optimization may result in more waste generation and safety consequences. Through dynamic modeling and optimization techniques, process constraints can be identified and overcome to enhance plant profitability.
ARABIAN JOURNAL FOR SCIENCE AND ENGINEERING
(2022)
Article
Engineering, Chemical
Moustafa Elshafei, Abdalrahman M. Amer, Ashraf Seleym, Ziad Khalifa, Tamer S. Ahmed
DESALINATION AND WATER TREATMENT
(2020)
Article
Green & Sustainable Science & Technology
Cameron Bracken, Nathalie Voisin, Casey D. Burleyson, Allison M. Campbell, Z. Jason Hou, Daniel Broman
Summary: This study presents a methodology and dataset for examining compound wind and solar energy droughts, as well as the first standardized benchmark of energy droughts across the Continental United States (CONUS) for a 2020 infrastructure. The results show that compound wind and solar droughts have distinct spatial and temporal patterns across the CONUS, and the characteristics of energy droughts are regional. The study also finds that compound high load events occur more often during compound wind and solar droughts than expected.
Article
Green & Sustainable Science & Technology
Ning Zhang, Yanghao Yu, Jiawei Wu, Ershun Du, Shuming Zhang, Jinyu Xiao
Summary: This paper provides insights into the optimal configuration of CSP plants with different penetrations of wind power by proposing an unconstrained optimization model. The results suggest that large solar multiples and TES are preferred in order to maximize profit, especially when combined with high penetrations of wind and photovoltaic plants. Additionally, the study demonstrates the economy and feasibility of installing electric heaters (EH) in CSP plants, which show a linear correlation with the penetration of variable energy resources.
Article
Green & Sustainable Science & Technology
M. Szubel, K. Papis-Fraczek, S. Podlasek
Article
Green & Sustainable Science & Technology
J. Silva, J. C. Goncalves, C. Rocha, J. Vilaca, L. M. Madeira
Summary: This study investigated the methanation of CO2 in biogas and compared two different methanation reactors. The results showed that the cooled reactor without CO2 separation achieved a CO2 conversion rate of 91.8%, while the adiabatic reactors achieved conversion rates of 59.6% and 67.2%, resulting in an overall conversion rate of 93.0%. Economic analysis revealed negative net present worth values, indicating the need for government monetary incentives.
Article
Green & Sustainable Science & Technology
Yang Liu, Yonglan Xi, Xiaomei Ye, Yingpeng Zhang, Chengcheng Wang, Zhaoyan Jia, Chunhui Cao, Ting Han, Jing Du, Xiangping Kong, Zhongbing Chen
Summary: This study investigated the effect of using nanofiber membrane composites containing Prussian blue-like compound nanoparticles (PNPs) to relieve ammonia nitrogen inhibition of rural organic household waste during high-solid anaerobic digestion and increase methane production. The results showed that adding NMCs with 15% PNPs can lower the concentrations of volatile fatty acids and ammonia nitrogen, and increase methane yield.
Article
Green & Sustainable Science & Technology
Zhong Ge, Xiaodong Wang, Jian Li, Jian Xu, Jianbin Xie, Zhiyong Xie, Ruiqu Ma
Summary: This study evaluates the thermodynamic, exergy, and economic performance of a double-stage organic flash cycle (DOFC) using ten eco-friendly hydrofluoroolefins. The influences of key parameters on performance are analyzed, and the advantages of DOFC over single-stage type are quantified.
Article
Green & Sustainable Science & Technology
Nicolas Kirchner-Bossi, Fernando Porte-Agel
Summary: This study investigates the optimization of power density in wind farms and its sensitivity to the available area size. A novel genetic algorithm (PDGA) is introduced to optimize power density and turbine layout. The results show that the PDGA-driven solutions significantly reduce the levelized cost of energy (LCOE) compared to the default layout, and exhibit a convex relationship between area and LCOE or power density.
Article
Green & Sustainable Science & Technology
Chunxiao Zhang, Dongdong Li, Lin Wang, Qingpo Yang, Yutao Guo, Wei Zhang, Chao Shen, Jihong Pu
Summary: In this study, a novel reversible liquid-filled energy-saving window that effectively regulates indoor solar radiation heat gain is proposed. Experimental results show that this window can effectively reduce indoor temperature during both summer and winter seasons, while having minimal impact on indoor illuminance.
Article
Green & Sustainable Science & Technology
Alessandro L. Aguiar, Martinho Marta-Almeida, Mauro Cirano, Janini Pereira, Leticia Cotrim da Cunha
Summary: This study analyzed the Brazilian Equatorial Shelf using a high-resolution ocean model and found significant tidal variations in the area. Several hypothetical barrages were proposed with higher annual power generation than existing barrages. The study also evaluated the installation effort of these barrages.
Article
Green & Sustainable Science & Technology
Francesco Superchi, Nathan Giovannini, Antonis Moustakis, George Pechlivanoglou, Alessandro Bianchini
Summary: This study focuses on the optimization of a hybrid power station on the Tilos island in Greece, aiming to increase energy export and revenue by optimizing energy fluxes. Different scenarios are proposed to examine the impact of different agreements with the grid operator on the optimal solution.
Article
Green & Sustainable Science & Technology
Peimaneh Shirazi, Amirmohammad Behzadi, Pouria Ahmadi, Sasan Sadrizadeh
Summary: This research presents two novel energy production/storage/usage systems to reduce energy consumption and environmental effects in buildings. A biomass-fired model and a solar-driven system integrated with photovoltaic thermal (PVT) panels and a heat pump were designed and assessed. The results indicate that the solar-based system has an acceptable energy cost and the PVT-based system with a heat pump is environmentally superior. The biomass-fired system shows excellent efficiency.
Article
Green & Sustainable Science & Technology
Zihao Qi, Yingling Cai, Yunxiang Cui
Summary: This study aims to investigate the operational characteristics of the solar-ground source heat pump system (SGSHPS) in Shanghai under different operation modes. It concludes that tandem operation mode 1 is the optimal mode for winter operation in terms of energy efficiency.
Article
Green & Sustainable Science & Technology
L. Bartolucci, S. Cordiner, A. Di Carlo, A. Gallifuoco, P. Mele, V. Mulone
Summary: Spent coffee grounds are a valuable biogenic waste that can be used as a source of biofuels and valuable chemicals through pyrolysis and solvent extraction processes. The study found that heavy organic bio-oil derived from coffee grounds can be used as a carbon-rich biofuel, while solvent extraction can extract xantines and p-benzoquinone, which are important chemicals for various industries. The results highlight the promising potential of solvent extraction in improving the economic viability of coffee grounds pyrolysis-based biorefineries.
Article
Green & Sustainable Science & Technology
Luiza de Queiroz Correa, Diego Bagnis, Pedro Rabelo Melo Franco, Esly Ferreira da Costa Junior, Andrea Oliveira Souza da Costa
Summary: Building-integrated photovoltaics, especially organic solar technology, are important for reducing greenhouse gas emissions in the building sector. This study analyzed the performance of organic panels laminated in glass in a vertical installation in Latin America. Results showed that glass lamination and vertical orientation preserved the panels' performance and led to higher energy generation in winter.
Article
Green & Sustainable Science & Technology
Zhipei Hu, Shuo Jiang, Zhigao Sun, Jun Li
Summary: This study proposes innovative fin arrangements to enhance the thermal performance of latent heat storage units. Through optimization of fin distribution and prediction of transient melting behaviors, it is found that fin structures significantly influence heat transfer characteristics and melting behaviors.
