Article
Food Science & Technology
Li Guo, Pengyu Zhao, Zhiqian Yao, Tianhui Li, Mengying Zhu, Zifeng Wang, Lingling Huang, Gulimire Niyazi, Dingxin Liu, Mingzhe Rong
Summary: Plasma-activated air (PAA) can effectively inactivate Salmonella enteritidis on the surface of eggs, providing an effective and safe strategy for aseptic processing in the poultry industry.
Article
Engineering, Aerospace
Min Jia, Zhibo Zhang, Wei Cui, Huimin Song, Zhangkai Huang
Summary: A Gliding Arc Plasma Jet Igniter (GAPJI) is designed to generate initial flame kernels with deeper penetration for successful ignition at high altitude. The GAPJI demonstrates higher penetration and discharge power, extending the lean ignition limit and enhancing combustion.
CHINESE JOURNAL OF AERONAUTICS
(2022)
Article
Physics, Applied
Changhuai Hu, Liming He, Yi Chen, Bingbing Zhao, Deng Jun, Mei Jiao Qu
Summary: The study found two different discharge modes in the RGA plasma-enhanced combustion dome, with airflow rate and input voltage having a significant impact on the discharge mode transformation.
JOURNAL OF PHYSICS D-APPLIED PHYSICS
(2021)
Article
Engineering, Chemical
Ximing Zhu, Yang Zhao, Ming Zhai, Pengyi Lv, Weixing Zhou, Bangdou Huang
Summary: Using gliding arc plasma combined with a swirl burner enhances the combustion performance of ammonia. Optical emission spectroscopy (OES) reveals that with the increase of equivalence ratio, electron density decreases while gas rotational temperature increases. The addition of NH3 significantly reduces NO emission and strengthens the combustion of NH3.
Article
Energy & Fuels
Qifu Lin, Yiman Jiang, Chengzhou Liu, Longwei Chen, Wenjin Zhang, Jun Ding, Jiangang Li
Summary: This study combines a gliding arc plasma reactor with a swirl burner to enhance ammonia combustion performance and reduce NO emission. By adjusting the gas discharge medium, equivalence ratio, and gas flow rate, the experimental results show a significant reduction in NO emission during ammonia combustion. These findings have important applications in the ammonia fuel industry.
Review
Polymer Science
Anton Manakhov, Maxim Orlov, Vyacheslav Grokhovsky, Fahd AlGhunaimi, Subhash Ayirala
Summary: This review presents innovative solutions for the treatment of produced water in oil and gas production, focusing on the combination of porous membranes and plasma treatment technologies for oil/water separation, desalination, and purification. The combination of these technologies results in increased efficiency and purity.
Article
Physics, Fluids & Plasmas
Xinyao Cheng, Huimin Song, Shengfang Huang, Yifei Zhu, Zhibo Zhang, Zhenyang Li, Min Jia
Summary: The performance of a gliding arc plasma igniter under close-to-real afterburner conditions was studied, and the working environment of the igniter was explored. Experimental results showed that the single-cycle discharge energy and maximum arc length were influenced by changes in the pressure difference, outlet flow rate, and installation angle.
PLASMA SCIENCE & TECHNOLOGY
(2022)
Article
Physics, Applied
Si-Yuan Zhang, Xiao-Song Li, He-Ping Li, Jing-Lin Liu, Ai-Min Zhu
Summary: Through analyzing the spatio-temporal evolution of GAD, a new mechanism governing arc evolution in 3D GAD was revealed. Different from traditional GAD, the PE arc continuously glides while the GE arc jumps, shedding the caudal part and generating a new arc tail simultaneously.
JOURNAL OF PHYSICS D-APPLIED PHYSICS
(2021)
Article
Chemistry, Physical
Sean Kelly, Annemie Bogaerts
Summary: Plasma-based gas conversion technology has the potential to produce carbon-free fertilizer, but challenges exist in sustaining high-energy efficiency plasma processes at higher powers and throughputs. Isolating the plasma from solid surfaces is advantageous in limiting energy loss and preventing material erosion to avoid soil contamination.
Article
Engineering, Environmental
Zhuo-Wen Xue, Jing-Lin Liu, Zhi-Yuan Zhang, Hemedi Kitila, Hao-Yu Lian, Bing Sun, Ai -Min Zhu
Summary: The reaction mechanism and energy transfer pathways of gliding arc methanol steam reforming (GA-MSR) were studied using a combination of experiment and plasma kinetics simulation. The important reactive species of H, OH, and CH3 were identified, and their roles in the reaction process were revealed. It was found that the concentration variation trends of these species regulate the production of CO2 and hydrocarbons at different methanol concentrations. The study also uncovered the energy transfer pathways and the major energy loss pathway of heat loss in GA-MSR, explaining the high energy efficiency achieved in this process.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Thermodynamics
Rong Feng, Jiajian Zhu, Zhenguo Wang, Fan Zhang, Yangyang Ban, Guoyan Zhao, Yifu Tian, Chenglong Wang, Hongbo Wang, Zun Cai, Mingbo Sun
Summary: The study utilized multi-channel gliding arc (MCGA) plasma to suppress combustion mode transition in a hydrogen-fueled cavity-based scramjet combustor. It was found that MCGA significantly increased the ratio of cavity-stabilized mode and suppressed mode transitions, mainly by raising temperature to promote mixing and combustion.
COMBUSTION AND FLAME
(2022)
Article
Thermodynamics
Ahlem Ghabi, Thibault Darny, Sebastien Dozias, Pablo Escot Bocanegra, Jean-Michel Pouvesle, Brahim Sarh, Eric Robert, Toufik Boushaki
Summary: This paper investigates the effects of carbon dioxide (CO2) addition and pulsed gliding arc (PGA) plasma on methane (CH4) flame stability and pollutant emissions. The results show that CO2 addition significantly changes the flame shape and behavior, making the flame more unstable at high CO2 percentages. On the other hand, the presence of PGA plasma reduces flame instabilities and CO concentration in the flue gases.
THERMAL SCIENCE AND ENGINEERING PROGRESS
(2023)
Article
Chemistry, Multidisciplinary
Grzegorz Komarzyniec, Michal Aftyka
Summary: This paper analyses the collaboration between a GlidArc-type plasma reactor and four dedicated power supplies. Each power supply has a different design solution. Plasma generation by electrical discharge requires careful analysis of power supply design and operating characteristics. The results show that different power supply parameters lead to different plasma reactor performance characteristics. An optimally designed power supply should combine the solutions contained in each of the power supplies tested.
APPLIED SCIENCES-BASEL
(2023)
Article
Chemistry, Physical
Ernest Bykov, Nerijus Striugas, Rolandas Paulauskas
Summary: This study investigates the impact of non-thermal plasma on CH4, CO2 gases, and their mixture in the pre-ignition stage. The emission spectroscopy was used to determine the optimal plasma parameters for reducing NO formation and increasing combustion efficiency. The results show a non-linear relationship between plasma frequency and radical emission.
Article
Thermodynamics
Rong Feng, Jiajian Zhu, Zhenguo Wang, Mingbo Sun, Hongbo Wang, Zun Cai, Bin An, Liang Li
Summary: A gliding arc discharge was used to ignite an ethylene-fueled scramjet combustor with an inflow speed of Ma = 2.92. The ignition process can be classified into direct ignition mode and re-ignition mode, with re-ignition mode being more likely in a local fuel-lean environment, exhibiting longer flame propagation time and a smaller flame kernel.
Review
Chemistry, Physical
Valentin Smeets, Eric M. Gaigneaux, Damien P. Debecker
Summary: Epoxidation reactions are crucial for modern chemistry, with Ti-based titanosilicate catalysts playing a central role in driving more versatile, high-performing, and greener processes. Challenges include improving catalyst performance through better control of active surface species and optimizing particle size, shape, and surface chemistry. Future research directions aim to broaden the application scope of new catalytic materials and enhance catalyst performance.
Article
Chemistry, Physical
Vijaykumar S. Marakatti, Maria Ronda-Lloret, Marian Krajci, Boby Joseph, Carlo Marini, Juan Jose Delgado, Francois Devred, N. Raveendran Shiju, Eric M. Gaigneaux
Summary: Intermetallic compounds (IMCs) are used as precursors to synthesize highly active and stable metal/metal oxide composite catalysts. Controlled modification leads to the formation of Co and Sm2O3 nano crystallites, enhancing catalytic activity. The presence of Co and Sm2O3 active sites in close proximity promotes the simultaneous adsorption or activation of reactants, improving catalytic performance.
CATALYSIS SCIENCE & TECHNOLOGY
(2022)
Article
Chemistry, Physical
Sorin Avramescu, Cristian D. Ene, Madalina Ciobanu, Josefine Schnee, Francois Devred, Cristina Bucur, Eugeniu Vasile, Luke Colaciello, Ryan Richards, Eric M. Gaigneaux, Marian Nicolae Verziu
Summary: In this study, the catalytic activity of TiO2, 2%Re-TiO2, and 10%Re-TiO2 in converting carbohydrates to levulinic acid under autoclave conditions was evaluated. The 10%Re-TiO2 catalyst showed a high levulinic acid yield and maintained stable catalytic activity after multiple cycles of use.
CATALYSIS SCIENCE & TECHNOLOGY
(2022)
Article
Engineering, Environmental
Chesseu M. Darryle, Elie Acayanka, Brice Takam, Leundjeu N. Line, Georges Y. Kamgang, Samuel Laminsi, Lotfi Sellaoui, Adrian Bonilla-Petriciolet
Summary: This study investigates the surface chemistry modification of palm fibers using plasma for the adsorption of sodium diclofenac from aqueous solution. Results show that plasma and hydrogen peroxide functionalized palm fibers exhibited the best adsorption properties for diclofenac removal. The study highlights the potential of utilizing biomasses for cost-effective and efficient adsorption processes to tackle water pollution caused by pharmaceuticals.
JOURNAL OF WATER PROCESS ENGINEERING
(2021)
Article
Chemistry, Physical
Juan Diaz, Luis R. Pizzio, Gina Pecchi, Cristian H. Campos, Laura Azocar, Rodrigo Briones, Romina Romero, Adolfo Henriquez, Eric M. Gaigneaux, David Contreras
Summary: A series of tetrabutyl ammonium salts of V-included Keggin-type polyoxoanions were prepared and characterized. The catalytic activity was found to be related to the number of V atoms present. Catalysts with higher V substitution degree exhibited higher activity.
Article
Chemistry, Inorganic & Nuclear
Gabriel Hidalgo, Michel Devillers, Eric M. Gaigneaux
Summary: This study thoroughly investigates two novel hybrid materials and explores the impact of bipyridine isomers on their formation and physicochemical properties. The study reveals that the bipyridine isomers cause distortion of the hybrids' skeleton units, leading to a decrease in their reduction potentials and enhanced performance in ammonia temperature-programmed desorption and the epoxidation of cyclooctene.
INORGANIC CHEMISTRY
(2022)
Article
Environmental Sciences
Claude F. G. Mbafou, Brice Takam, Franck W. Boyom-Tatchemo, Jean-Baptiste Tarkwa, Elie Acayanka, Georges Y. Kamgang, Eric M. Gaigneaux, Samuel Laminsi
Summary: This study proposes a greener approach to enhance the adsorption capacity of clays for wastewater pollutants. By mixing clay with eggshell and calcining, the internal specific surface area and retention capacity of the clays are increased, resulting in improved removal efficiency of dyes from polluted water.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2023)
Article
Chemistry, Physical
Sebastian Gamez, Ernesto de la Torre, Eric M. Gaigneaux
Summary: Microporous oxidized activated carbon and macroporous oxidized carbon black were evaluated for the complexation of Ru in the oxidative cleavage of oleic acid. The results showed that macroporous oxidized carbon black had higher activity and stability compared to microporous oxidized activated carbon.
MOLECULAR CATALYSIS
(2022)
Article
Engineering, Chemical
Sebastian Gamez, Ernesto de la Torre, Eric M. Gaigneaux
Summary: Valorization of palm oil to produce azelaic acid, an important component for skin cancer treatment, was achieved through oxidative cleavage of unsaturated fatty acids using Ru-carbon catalysts. Triglycerides from palm oil were converted to fatty acid methyl esters, which were then reacted in a catalytic system consisting of H2O/MeCN/AcOEt with NaIO4 and N-methylmorpholine N-oxide. The Ru-carbon catalysts displayed >99% conversion and achieved a yield of around 85% for azelaic acid in 5 hours at room temperature. Furthermore, these catalysts showed good recyclability for five cycles, making them a promising option for the production of high-value-added products from cheap feedstocks like palm oil.
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
(2023)
Article
Chemistry, Inorganic & Nuclear
Gabriel Hidalgo, Gabriella Barozzino-Consiglio, Koen Robeyns, Michel Devillers, Eric M. Gaigneaux
Summary: When the precatalyst (2,2'-Hbpy)(3)[PW12O40] reacts with H2O2 under catalytic conditions, it forms two oxidized species, an inactive byproduct (2,2'-bpyHO)(3)[PW12O40] and an activator [WO-(O-2)(2)(2,2'-bpy)]. The activator then activates H2O2 to form the active species for catalyzing the epoxidation reaction. H2O2 also serves as a conservative agent, essential for preventing irreversible deactivation of the catalyst.
INORGANIC CHEMISTRY
(2023)
Article
Energy & Fuels
Germain Dionmbete, Nehemie Miloh, Jean-Baptiste Tarkwa, Elie Acayanka, Albert Brandt Poupi Mbouopda, Franck-William Boyom-Tatchemo, Georges Youbi Kamgang
Summary: In this study, agricultural palm fiber waste was used to prepare a multifunctional biocomposite material, and the surface chemistry was improved by activating the raw palm fibers using non-thermal plasma. The prepared biocomposite showed good removal performance for diclofenac in synthetic wastewater under specific conditions.
BIOMASS CONVERSION AND BIOREFINERY
(2023)
Article
Chemistry, Physical
Sebastian Gamez, Alixandre Magerat, Ernesto de la Torre, Eric M. Gaigneaux
Summary: Macroporous oxidized carbon black (CBO) was functionalized with 4,4'-diamino-2,2'-bipyridine (NH2-bpy) and polydopamine (PDA) to form Ru complexes for the catalytic valorization of oleic acid. The reaction produced azelaic and pelargonic acids, which are highly demanded in pharmacology. Among the three catalysts tested, the PDA-based catalyst showed the most promising results, achieving complete conversion of oleic acid with yields of pelargonic and azelaic acids around 95%. The PDA catalyst remained active even after five runs due to the re-adsorption of Ru species by catechol groups of PDA.
MOLECULAR CATALYSIS
(2023)
Article
Engineering, Multidisciplinary
Voufouo Anne Suzie, Tarkwa Jean-Baptiste, Acayanka Elie, Momeni Natacha, Nzali Serge, Kamgang Youbi Georges, Laminsi Samuel
Summary: Photocatalysis is widely used in the chemical industry due to its cost-saving benefits. In this study, a homemade supported catalyst was developed through low-temperature plasma exposure, resulting in improved handling and particle dispersion. The catalyst features a photo-active hetero-structure that enhances charge carriers separation and overcomes rapid recombination. It showed resilient stability after multiple cycles and exhibited promising performance as a photocatalyst for various applications.
RESULTS IN ENGINEERING
(2022)
Article
Chemistry, Multidisciplinary
Chiraz Gannoun, Abdelhamid Ghorbel, Eric M. Gaigneaux
Summary: This paper investigates the impact of the direct incorporation of ZrO2 in TiO2 and TiO2-CeO2 aerogel supports on the physico-chemical and catalytic properties of supported vanadia catalysts. The results show that Zr-doped V2O5 based catalysts exhibit improved catalytic performance in the total oxidation of chlorobenzene.
Article
Engineering, Environmental
Belibi Jean-Rameaux, Takam Brice, Dalhatou Sadou, Tarkwa Jean-Baptiste, Sop T. Berthelot, Acayanka Elie, Kamgang Y. Georges, Laminsi Samuel
Summary: This study focused on the use of glycine grafted plasma-modified cocoa shell as a sorbent for the removal of ibuprofen (IBP) from aqueous medium. The plasma pretreatment and grafting process successfully created functional groups on the biomass, leading to improved IBP uptake compared to unmodified biomass. The experimental results indicated that the Avrami fractional-order model was the most suitable to predict the adsorption behavior, and the process was spontaneous and exothermic according to the values of Delta H degrees and Delta G degrees.
JOURNAL OF POLYMERS AND THE ENVIRONMENT
(2021)