Article
Food Science & Technology
Lirong Xu, Chenfei Zhu, Taorong Liu, Emad Karrar, Yucheng Ouyang, Duo Li
Summary: The study found that microwave heating time has a significant impact on the oil yield, chemical properties, and antioxidant activity of Trichosanthes kirilowii Maxim seed oil. Longer heating time can improve the oil yield and antioxidant activity. The seed shell also affects the chemical properties and antioxidant activity of the oil.
FOOD RESEARCH INTERNATIONAL
(2022)
Article
Food Science & Technology
Zoltan Szabo, Tamas Marosvoelgyi, Eva Szabo, Viktor Koczka, Zsofia Verzar, Maria Figler, Tamas Decsi
Summary: Short-term heating of edible oils leads to changes in fatty acid composition and health-related indices. Regardless of the oil type, heating reduces the levels of linoleic acid and alpha-linolenic acid, while increasing trans fatty acid levels. The oils also show higher atherogenicity and thrombogenicity after heating.
Article
Materials Science, Ceramics
Min Wei, Haizhou Wang, Liwu Jiang, Lei Zhao, Lixia Yang, Xuebin Chen
Summary: Spark plasma sintering technology was used to prepare SiC-Al2O3 composite absorbers with different compositions, and the effects of composition, heating time, and microwave power on their heating characteristics were analyzed. It was found that increasing the microwave power led to higher temperature achieved by the absorbers, and the absorbers with different Al2O3 content had different heating temperatures. These findings are important for precise temperature control in microwave heating of composite absorbers.
CERAMICS INTERNATIONAL
(2022)
Article
Energy & Fuels
Shuai Zhao, Haiming Gao, Wanfen Pu, Mikhail A. Varfolomeev, Chengdong Yuan
Summary: This study investigated the low-temperature oxidation behavior of heavy oil and found that it undergoes heat release at lower temperatures. Combustion of heavy oil at 400 degrees Celsius had a more lasting effect compared to 500 degrees Celsius. The heat release at 300 degrees Celsius varied for different oxidized oils, which may be attributed to the presence of saturate and aromatic components.
Article
Engineering, Chemical
Alexey V. Vakhin, Mohammed A. Khelkhal, Arash Tajik, Nikita E. Ignashev, Tatiana O. Krapivnitskaya, Nikolay Yu. Peskov, Mikhail Yu. Glyavin, Svetlana A. Bulanova, Olga V. Slavkina, Konstantin A. Schekoldin
Summary: The experiments demonstrated that the iron-magnetite-based nanocatalyst improves the destructive hydrogenation processes of resins and asphaltenes compounds in carbonate oil-containing rock samples. The presence of the catalyst results in a decrease in asphaltene content and molecular weight, increasing the oil fluid's filtration capacity in the reservoir rock porous medium. Additionally, the absence of the catalyst leads to the least increase in non-extractable organic matter content in the rock samples.
Article
Chemistry, Applied
Carolina P. C. Martins, Rodrigo N. Cavalcanti, Tatiana S. F. Cardozo, Silvia M. Couto, Jonas T. Guimara, Celso F. Balthazar, Ramon S. Rocha, Tatiana C. Pimentel, Monica Q. Freitas, Renata S. L. Raices, Marcia C. Silva, Erick. A. Esmerino, Daniel Granato, Adriano G. Cruz
Summary: The study demonstrated that microwave heating has a significant impact on the quality of orange juice-milk beverages. Compared to conventional pasteurization, microwave-heated OJMB showed better retention of bioactive compounds, making it a potential alternative to pasteurization.
Article
Energy & Fuels
Jingyi Zhu, Liangping Yi, Zhaozhong Yang, Xiaogang Li
Summary: This study presents mathematical models to simulate the temperature distribution, kerogen decomposition, and production efficiency of oil and gas under microwave heating, with a focus on the effects of output power level and thermal conductivity of oil shale on reservoir temperature distribution. The study suggests that intermittent and stepwise heating modes can effectively prevent superheating and improve production efficiency compared to electrical heating.
Article
Thermodynamics
Lu He, Yue Ma, Changtao Yue, Shuyuan Li, Xun Tang
Summary: In this study, the microwave pyrolysis of oil shales from different regions was investigated, and a comparison with conventional oil shale pyrolysis was conducted. The results showed that the microwave power and organic matter content in oil shale had significant effects on the temperature profile and heating rate. Microwave pyrolysis achieved higher weight loss and required less processing time and energy input compared to conventional pyrolysis. Additionally, the activation energy decreased and the reaction rate constant increased under microwave pyrolysis, indicating higher thermal reactivity and reaction rates.
Article
Engineering, Environmental
Jingyi Zhu, Liangping Yi, Zhaozhong Yang, Ming Duan
Summary: Microwave heating technology has been explored as an alternative to conventional heating methods for oil shale upgrading. Numerical simulations were conducted to investigate the thermal response of oil shale under microwave irradiation, revealing nonuniform temperature distribution and the most efficient heating frequency at 2.45 GHz.
CHEMICAL ENGINEERING JOURNAL
(2021)
Article
Food Science & Technology
Ammar Cherif, Amor Slama
Summary: This study investigated the effect of heat treatment on the fatty acid composition of edible oils used in frying and cooking. The results showed that oils maintained thermal stability at temperatures of 150-180 degrees C, while significant changes were observed at 210-240 degrees C. Sunflower oil was more affected by heat treatment compared to soybean and corn oil.
JOURNAL OF FOOD QUALITY
(2022)
Article
Energy & Fuels
Shuai Zhao, Wanfen Pu, Hao Gao, Ruofan Wang, Mikhail A. Varfolomeev, Qi Jiang, Chengdong Yuan
Summary: A thermogravimetric study was conducted to investigate the isothermal low-temperature oxidation (LTO) characteristics of heavy crude oil and its oxidized oils. The study determined the appropriate reaction orders and activation energies for the different oil samples, and found that the oils oxidized at higher temperatures had higher residual mass after thermal degradation. The developed isothermal kinetics was shown to be a useful tool for predicting the LTO behavior of heavy oils.
Article
Energy & Fuels
Liangliang Wang, Jiexiang Wang, Wanfen Pu, Tengfei Wang
Summary: This study investigated the oxidation behavior of FC extra-heavy oil and its isothermal oxidized oils, with a focus on the importance of low-temperature oxidation for combustion front stability in in-situ combustion. The results showed that oxygen addition reactions were the main pathway in heavy oil LTO, with high temperatures leading to better combustion efficiency of oxidized oils. Further research should explore the implications of these findings for practical applications in the FC oilfields.
Article
Materials Science, Multidisciplinary
Justin Chassagne, Clemence Petit, Christophe Meunier, Francois Valdivieso
Summary: This study compared the effects of conventional and microwave heating on the formation of magnesium and zinc aluminate spinels, finding that spinel phases could be obtained more rapidly under microwave thermal cycles. The presence of ZnO as a microwave absorbent was beneficial for material interactions, but a SiC susceptor was necessary for heating in all considered mixtures.
MATERIALS TODAY COMMUNICATIONS
(2022)
Article
Food Science & Technology
Woo-Ju Kim, Dong-Hyun Kang
Summary: This study evaluated the inactivation efficiency of essential oils on E. coli O157:H7, Salmonella Typhimurium, and Listeria monocytogenes in buffered peptone water and hot-chili sauce when coupled with microwave heating. The results showed that the combination of carvacrol and microwave heating for 45 seconds had the most effective inactivation for the pathogens. This method can effectively inactivate the pathogens while ensuring food safety.
INTERNATIONAL JOURNAL OF FOOD MICROBIOLOGY
(2023)
Article
Energy & Fuels
Jorge A. Orrego-Ruiz, Fernando A. Rojas-Ruiz, Hernando Bottia, Carlos Naranjo, Anibal Ordonez, Luz M. Ballesteros-Rueda
Summary: This study investigates the effect of composition on low-temperature oxidation of crude oils during in situ combustion. The results show that oils with higher sulfur content and more aromatic compounds exhibit higher reactivity. The use of a catalyst also promotes oxidative reactions. This study is important for assessing the feasibility and applicability of this technology.
Review
Food Science & Technology
Abarasi Hart, Christian Anumudu, Helen Onyeaka, Taghi Miri
Summary: Ensuring food safety and extending shelf-life are key priorities in the food industry. The use of supercritical fluid carbon dioxide (SF-CO2) has been shown to effectively inactivate spores-forming microbes while preserving the nutritional characteristics of food products.
JOURNAL OF FOOD SCIENCE AND TECHNOLOGY-MYSORE
(2022)
Review
Food Science & Technology
Helen Onyeaka, Taghi Miri, Abarasi Hart, Christian Anumudu, Ozioma Forstinus Nwabor
Summary: Ultrasound technology is an emerging food processing technology that inhibits microbial proliferation and extends shelf-life through the rupture and lysis of microbial cells. It has found application in various food processing, and can be combined with other treatments for enhanced efficacy.
FOOD REVIEWS INTERNATIONAL
(2023)
Article
Energy & Fuels
Osaze Omoregbe, Abarasi Hart
Summary: This paper presents a bibliometric survey on the historic trends and future pattern of heavy oil and bitumen recovery and upgrading. It identifies Canada as the highest producer and widely cited country in this field. The research focuses on viscosity reduction, rheology, asphaltenes, enhanced oil recovery methods, and upgrading. The University of Calgary and the University of Alberta are the most impactful institutions.
JOURNAL OF ENERGY RESOURCES TECHNOLOGY-TRANSACTIONS OF THE ASME
(2022)
Review
Agriculture, Multidisciplinary
Helen Onyeaka, Ozioma Nwabor, Siwon Jang, KeChrist Obileke, Abarasi Hart, Christian Anumudu, Taghi Miri
Summary: This article provides an overview of the current state of the art in the application of Sous vide (SV) techniques for processing and preserving foods. Unlike conventional thermal food processing, SV method improves food quality, nutrition, and shelf-life while destroying microorganisms. However, its effectiveness in eliminating microbial pathogens is limited and can be enhanced by combining with other non-thermal methods.
JOURNAL OF THE SCIENCE OF FOOD AND AGRICULTURE
(2022)
Article
Chemistry, Organic
Abarasi Hart
Summary: This paper discusses methods to extend catalyst longevity in the Toe-to-Heel Air Injection (THAI) combined with in situ catalytic upgrading process (CAPRI), in order to improve the recovery and upgrading efficiency of heavy oil. By using different catalyst designs and operation conditions, coke formation can be effectively suppressed and catalyst longevity can be optimized.
PETROLEUM CHEMISTRY
(2022)
Article
Polymer Science
Fabio M. Lamberti, Luis A. Roman-Ramirez, Andrew P. Dove, Joseph Wood
Summary: Polylactic acid (PLA) is a leading bioplastic with a predicted increase in market share. Chemical recycling via alcoholysis is a beneficial disposal route for PLA, generating value-added products alkyl lactates. The combination of certain catalysts can enhance the reactivity of PLA methanolysis.
Review
Engineering, Chemical
KeChrist Obileke, Helen Onyeaka, Taghi Miri, Ozioma Forstinus Nwabor, Abarasi Hart, Zainab T. Al-Sharify, Shahad Al-Najjar, Christian Anumudu
Summary: Ensuring food safety is a crucial concern for researchers and food engineers. Various microorganisms can contaminate food products, but traditional thermal processes have limitations. This study reviewed the potential applications of novel technologies such as radio frequency, pulsed light, and cold plasma for pasteurizing food products. It concluded that traditional thermal processes are useful but not suitable for temperature-sensitive foods. Hurdle technology, which combines multiple techniques, is recommended for better germicidal results.
JOURNAL OF FOOD PROCESS ENGINEERING
(2022)
Article
Food Science & Technology
Ozioma Forstinus Nwabor, Helen Onyeaka, Taghi Miri, Kechrist Obileke, Christian Anumudu, Abarasi Hart
Summary: Consumers' changing preference for perceived healthier minimally processed alternatives is challenging the food industry, and cold plasma technology has emerged as a potential solution for ensuring food safety. However, the exact mechanism behind the effectiveness of cold plasma is still unclear, and further research is needed.
FOOD ENGINEERING REVIEWS
(2022)
Review
Green & Sustainable Science & Technology
Phemelo Tamasiga, Taghi Miri, Helen Onyeaka, Abarasi Hart
Summary: This study examines the trends and patterns in food waste and circular economy using bibliometric review technique. Through the analysis of publications, eight broad themes are identified, emphasizing the importance of promoting collaboration and quantifying food waste and greenhouse gas emissions. The study also highlights the need to investigate the implementation of circularity in developing countries.
Article
Biochemistry & Molecular Biology
Helen Onyeaka, Paolo Passaretti, Taghi Miri, Abarasi Hart, Claudia Favero, Christian K. Anumudu, Phillip Robbins
Summary: This study improves the teaching method of laboratory demonstrations in a chemical engineering course at the university by utilizing digital technology. Video demonstrations allow students to acquire the necessary knowledge and understanding before conducting the experiments, reducing the burden on facilities and staff. The results of knowledge-based quizzes and student surveys demonstrate the positive impact of pre-lab videos in increasing student participation and improving learning outcomes.
BIOCHEMISTRY AND MOLECULAR BIOLOGY EDUCATION
(2023)
Article
Energy & Fuels
Mustapha Yusuf, Gary Leeke, Joseph Wood
Summary: The development of highly active and selective catalysts is crucial for the realization of biofuels and chemicals. In this study, a conventional ZSM-5 zeolite was modified with NaOH, leading to improved catalytic activity and selectivity. The modified catalyst showed great potential for future industrial applications.
Article
Energy & Fuels
Thomas Lopeman, Hossein Anbari, Gary Leeke, Joseph Wood
Summary: There are vast reserves of heavy oil worldwide that are difficult to recover. Improving energy efficiency and developing cleaner recovery methods are crucial for the transition to net-zero. This study investigates the impact of injected steam on in situ heavy oil upgrading processes and presents a novel modeling method using CMG STARS.
Article
Chemistry, Physical
Ismaila Mudi, Abarasi Hart, Andrew Ingram, Joseph Wood
Summary: This study focuses on the conversion of vanillin, an oxygenated phenolic compound found in bio-oil, into creosol through hydrodeoxygenation (HDO). Utilizing biochar residue as a catalyst support, the physicochemical properties of the biochar were enhanced by utilizing H2SO4 and KOH as chemical activators. The prepared Ni/biochar catalyst exhibited high selectivity and activity for p-creosol, with a conversion rate of up to 97% and a selectivity of 91.17%, and maintained stability after four cycles. Chemical treatments of the biochar support resulted in improved catalytic performance, with Ni/biochar (H2SO4) showing the highest conversion and p-creosol yield.
Review
Chemistry, Multidisciplinary
Abarasi Hart, Komonibo Ebiundu, Ebikapaye Peretomode, Helen Onyeaka, Ozioma Forstinus Nwabor, KeChrist Obileke
Summary: This review discusses technologies for recovering valuable materials from waste bones and explores their potential applications in various fields. The recovered materials can be used as adsorbents, catalysts, and electrodes for environmental and energy purposes, promoting sustainable development and a circular economy.