Article
Agricultural Engineering
Zexiao Zhang, Jiahui Wei, Bing Yuan, Fengli Yu, Congxia Xie, Shitao Yu
Summary: An aqueous phase Pd nanoparticles (NPs) system stabilized by sodium lignosulfonate (SLS) exhibited favorable catalytic performance in hydrodeoxygenation of vanillin to produce 2-methoxy-4-methylphenol (MMP). The optimized Pd NPs with an average diameter of 14.63 nm achieved a 99.8% vanillin conversion and a 98.6% MMP selectivity. Moreover, MMP showed auto-separation property from the aqueous catalyst system due to its low solubility in water. This environmentally friendly method of converting vanillin into MMP using SLS was demonstrated to have stable catalytic activity.
INDUSTRIAL CROPS AND PRODUCTS
(2023)
Article
Chemistry, Multidisciplinary
Minh-Huy Dinh Dang, Trang Thi Thu Nguyen, Bao Quang Gia Le, Linh Ho Thuy Nguyen, Ngoc Xuan Dat Mai, My Van Nguyen, Phuong Hoang Tran, Tan Le Hoang Doan
Summary: Pd(II)BUT-11, a Pd-incorporated Zr-based metal-organic framework with sulfone groups, was successfully prepared by dispersing the sulfone-functionalized MOF in Pd(OAc)(2) solution. The Pd-incorporated MOF exhibited efficient heterogeneous catalytic performance for synthesizing various stilbene derivatives via the cross-coupling Heck reaction with a DABCO-derived deep eutectic solvent (DES) as a green solvent. The catalyst and solvent could be recovered and reused, maintaining their activity and structure stability.
JOURNAL OF INDUSTRIAL AND ENGINEERING CHEMISTRY
(2022)
Article
Chemistry, Applied
Xin Zhang, Jingyun Jiang, Hao Li
Summary: By tuning the crystal structure of ZrO2 support, the Pd/ZrO2 catalysts exhibited excellent efficiency in vanillin hydrodeoxygenation (HDO), achieving approximately 100% yield of 2-methoxy-4-methylphenol (MMP) under mild conditions. The catalyst with ZS3 support showed the best performance due to the catalytic synergy of exposed metal active sites, oxygen vacancies, and acid sites.
FUEL PROCESSING TECHNOLOGY
(2023)
Article
Chemistry, Applied
Xiang Li, Xiang Zeng, Ying Zhang
Summary: A bimetallic Pd-Ru/hydroxyapatite catalyst was developed for the conversion of lignocellulose-derived C15 oxygenate into aviation fuel range hydrocarbons. The catalyst exhibited high hydrodeoxygenation activity under optimal reaction conditions, leading to the production of high carbon alkanes.
FUEL PROCESSING TECHNOLOGY
(2022)
Article
Chemistry, Inorganic & Nuclear
Xiu-Zhi Wei, Haiyong Wang, Jianguo Liu, Longlong Ma
Summary: In this study, highly dispersed Pd species were successfully immobilized on NH2-MIL-125 (Ti) frameworks through a one-step synthesis method, forming Pd@MOF. The Pd@MOF catalyst showed high efficiency in the hydrodeoxygenation reaction of vanillin to 2-methoxy-4-methyl phenol at room temperature under 1 atm of H2 pressure. The smaller Pd particles encapsulated in MOFs inhibited Pd over oxidation and allowed for the selective production of different reduction products by tuning the reaction time. This catalyst also exhibited high effectiveness in the transformation of various biomass-derived compounds.
INORGANIC CHEMISTRY COMMUNICATIONS
(2023)
Article
Chemistry, Physical
Mingrui Li, Kowsalya D. Rasamani, Yugang Sun
Summary: Utilizing highly dispersed Pd nanoparticles attached to the surface of silica nanospheres for photocatalytic hydrodeoxygenation (HDO) of vanillin enables efficient deep HDO yield under mild reaction conditions. The reaction kinetics of the photocatalytic HDO process is orders of magnitude higher compared to the catalytic HDO process in the dark.
JOURNAL OF PHYSICAL CHEMISTRY C
(2021)
Article
Chemistry, Physical
Liang Hong, Jing Yang, Yongzheng Li, Xin Gao, Wuling Song, Hongxi Zhang
Summary: In this study, an acid-modified vermiculite (AVM)-supported Pd-Ni bimetallic catalyst was investigated for the hydrodeoxygenation of bio-oil and its model compounds. The catalyst efficiently hydrodeoxygenated phenol, reaching 94% conversion at 0.5% Ni loading and temperatures beyond 513 K. The synergistic effects between the active component and the carrier were found to be the main reason for the catalytic activity, with significant influences of Ni loading and temperature on the hydrogenation of phenol.
Article
Engineering, Environmental
Ganesh Sunil More, Dipika Rajendra Kanchan, Arghya Banerjee, Rajendra Srivastava
Summary: The development of sustainable catalytic process for converting lignin model compounds to renewable fuels and chemicals is crucial for a fossil-fuel-free modern society. In this study, Pd/CuFe2O4 and bimetallic PdNi/CuFe2O4 catalysts were developed for the hydrodeoxygenation of vanillin to MMP and 4-MC, respectively. The Pd/CuFe2O4 catalyst achieved selective conversion of vanillin to MMP using IPA as the hydrogen transfer agent. The Pd NPs and CuFe2O4 in the 1Pd/CuFe2O4 catalyst exhibited synergistic effects, resulting in high conversion (99.4%) and selectivity (99.2%) towards MMP at 150 degrees C. Incorporation of Ni into Pd/CuFe2O4 (1Pd7Ni/CuFe2O4) enabled the production of 4-MC from vanillin with 95.8% yield under H2 (20 bar) at 180 degrees C.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Chemistry, Physical
Xinyi Tan, Chang Yu, Xuedan Song, Li Ni, Hanyu Xu, Yuanyang Xie, Zhao Wang, Song Cui, Yongwen Ren, Wenbin Li, Yafang Zhang, Jieshan Qiu
Summary: By manipulating catalyst-electrolyte interfaces in saturated KCl electrolyte, the CO tolerance and activity of Pd/C catalyst can be enhanced. The reconstructed Pd/C catalysts exhibit high activity and stability in the presence of high concentrations of CO. These findings are important for the design and fabrication of active and stable Pd-based catalysts, as well as the manipulation of activity and stability at catalyst-electrolyte interfaces.
Article
Chemistry, Applied
Xiaowa Nie, Zeshi Zhang, Haozhi Wang, Xinwen Guo, Chunshan Song
Summary: Density functional theory (DFT) calculations were used to study the effects of surface structure and Pd doping on Fe catalysts on the activity and selectivity of phenol hydrodeoxygenation (HDO). Pd doping did not significantly influence phenol adsorption stability, but promoted selectivity towards benzene formation on Fe(211) by increasing kinetic barrier between dehydroxylation and ring hydrogenation pathways.
Article
Chemistry, Physical
Zhijun Li, Xiaowen Lu, Weiwei Sun, Leipeng Leng, Mingyang Zhang, Honghong Li, Lu Bai, Dundong Yuan, J. Hugh Horton, Qian Xu, Jun Wang
Summary: This study presents a one-step synthetic approach to fabricate a catalyst with atomically dispersed palladium atoms bonded covalently to nearby oxygen atoms, which shows outstanding catalytic performance and stability in the hydrodeoxygenation of vanillin. This high activity is attributed to the unique electronic structure of isolated palladium atoms confined in defective WO2.72, paving the way for the advancement of single atom catalysis through a coordination-engineered strategy.
APPLIED CATALYSIS B-ENVIRONMENTAL
(2021)
Article
Chemistry, Physical
Zhenping Cai, Yongxin Ding, Jiayin Zhang, Panjie Yu, Yongde Ma, Yanning Cao, Ying Zheng, Kuan Huang, Lilong Jiang
Summary: In this study, oil-soluble Mo-based ionic liquids were used as precursors to produce MoS2 catalysts for the hydroconversion of biolipids. The in situ generated MoS2 catalysts showed excellent activity in converting methyl palmitate and hexadecane to biodiesel. The structures of the catalysts were characterized, and the hydroconversion kinetics and pathways were analyzed. High conversions of feeds and selectivities of HDO products were achieved in the hydroconversion of methyl palmitate and palm oil under solvent-free condition.
JOURNAL OF CATALYSIS
(2023)
Article
Chemistry, Organic
Yaqoob A. Teli, Reetu Reetu, Priyanka Gurdev Singh, Mayur Jagdishbhai Patel, Sonali Dash, Snehangshu Paine, Poornachandra Shamanna Prabhakar, Virender Singh, Kavya S. Keremane, Nabil Al-Zaqri, Kalisadhan Mukherjee, Saikat Dutta, Chandi C. Malakar
Summary: This study successfully developed a new catalyst, Pd@rGO-CuFe2O4, and demonstrated its effectiveness in Suzuki-Miyaura type coupling reactions. The catalyst showed excellent activity and recyclability, and could be used in aqueous media with biomass-derived solvent.
ASIAN JOURNAL OF ORGANIC CHEMISTRY
(2023)
Article
Chemistry, Multidisciplinary
Giuseppe Bagnato, Michela Signoretto, Elena Ghedini, Federica Menegazzo, Xiaoying Xi, Gert H. ten Brink, Bart J. Kooi, Hero Jan Heeres, Aimaro Sanna
Summary: Bio-oil requires a stabilization stage before its upgrading, and the hydrogenation of the water fraction can effectively reduce acidity and improve stability. In this study, PdFe/ZrO2 catalyst showed the best performance in reducing acidity and improving stability of bio-oil.
NEW JOURNAL OF CHEMISTRY
(2023)
Article
Chemistry, Multidisciplinary
Haitao Yu, Yang Xu, Kaden Havener, Meng Zhang, Li Zhang, Wenjin Wu, Kun Huang
Summary: Selective hydrogenation and hydrodeoxygenation of biomass to value-added products is a crucial step in the development of renewable energy resources. In this study, nitrogen/oxygen co-doped porous carbon nanospheres were used as the host matrix to encapsulate highly dispersed Pd nanoparticles, resulting in a catalyst that exhibited excellent catalytic activity and temperature-controlled selectivity for the hydrogenation and hydrodeoxygenation of vanillin derived from biomass.
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.