Article
Chemistry, Physical
D. H. D. Rocha, T. A. Z. de Souza, C. J. R. Coronado, J. L. Silveira, R. J. Silva
Summary: The study found that by recycling the residual gas with high concentration of water and CO2, the glycerol reforming capacity can be maximized while increasing the system's overall exergy efficiency. This process was evaluated in three different scenarios regarding reform gas processing from technical and environmental perspectives.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2021)
Article
Green & Sustainable Science & Technology
M. Salome Macedo, M. A. Soria, Luis M. Madeira
Summary: In recent years, glycerol steam reforming (GSR) has been a focus of interest for the production of green hydrogen, with researchers focusing on GSR thermodynamics, catalyst development, reaction kinetics and mechanisms, reactor models, and innovative reactor configurations.
RENEWABLE & SUSTAINABLE ENERGY REVIEWS
(2021)
Article
Chemistry, Physical
D. Padmakar, G. Suresh Babu, P. Rajitha, N. Lingaiah
Summary: The effect of cobalt dispersed on SrO-ZrO2 mixed oxide catalysts with varying ratios of Sr and Zr on hydrogen production from glycerol steam reforming was studied. The catalyst with 15%Co dispersed on SrO-ZrO2 with a 1:1 ratio of Sr and Zr exhibited the best activity, attributed to the presence of a greater number of octahedral sites, small Co particles, Sr-Zr-Co-O solid solution, strong metal support interactions, and basicity.
APPLIED SURFACE SCIENCE
(2022)
Article
Chemistry, Multidisciplinary
Eliane Dahdah, Jane Estephane, Cedric Gennequin, Bilal El Khoury, Antoine Aboukais, Edmond Abi-Aad, Samer Aouad
Summary: The physico-chemical properties of Ni, Ru, Ru-Ni monoclinic ZrO2 catalysts were studied and their catalytic activities in the glycerol steam reforming reaction were compared. Different characterization techniques were used to analyze the catalysts. The results showed that the combination of Ru and Ni on zirconia led to improved catalytic performance and stability.
SUSTAINABLE CHEMISTRY AND PHARMACY
(2023)
Article
Energy & Fuels
Zulfiqar Ali Bhatti, Sania Bhatti, Sikandar Ali Abbasi, Abdul Sattar Jatoi, Abdul Qadeer Laghari, Ghulamullah Maitlo
Summary: This study investigates the impact of steam glycerol reformation on hydrogen production through thermodynamic analysis. The results show that changing temperature, pressure, and water/glycerol ratio can improve hydrogen production.
BIOMASS CONVERSION AND BIOREFINERY
(2023)
Article
Chemistry, Physical
Surendar Moogi, Lingaiah Nakka, S. Sai Prasad Potharaju, Ashfaq Ahmed, Abid Farooq, Sang-Chul Jung, Gwang Hoon Rhee, Young-Kwon Park
Summary: Different cobalt-based mixed oxide catalysts were synthesized and tested for hydrogen production from glycerol steam reforming, with the 5Cu20CM catalyst showing the best performance attributed to its small particle size, high dispersion, and large surface area.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2021)
Article
Chemistry, Physical
Hongrui Liu, Hongshen Li, Shizhong Li
Summary: The performance of hydrocalumite derived catalysts prepared by co-precipitation in ethanol steam reforming was investigated. It was found that the catalysts with 15 wt% nickel content exhibited the best performance, with ethanol conversion and hydrogen yield reaching 100% and 85% respectively.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2022)
Article
Chemistry, Physical
J. F. Da Costa-Serra, A. Miralles-Martinez, B. Garcia-Munoz, S. Maestro-Cuadrado, A. Chica
Summary: Ni and Co catalysts supported on ITQ-6 zeolite were synthesized and evaluated for ethanol steam reforming. Co/ITQ-6 showed higher conversion and hydrogen production than Ni/ITQ-6, attributed to smaller cobalt particle size. Co/ITQ-6 also exhibited lower selectivity for by-products and higher stability. Rating: 8/10.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2023)
Article
Chemistry, Applied
Hamdya Sabrina Mohidin Yahya, Nor Aishah Saidina Amin
Summary: The development of sustainable materials for tar removal catalysts in biomass gasification technology is crucial. This study investigates the effect of support modification using hydrogen peroxide (H2O2) and Ni and/or Co loadings on catalytic performance in the steam reforming of toluene as a biomass tar model compound. Results show that H2O2-modified activated carbon (ACP) exhibits enhanced oxygenated functional groups and ultramicroporosity, leading to highly dispersed active metal sites and high acidity after Ni-Co impregnation. The most active catalyst is found to be 10%Ni-10%Co/ACP, with high H-2 yield, toluene conversion, and stability. This is attributed to high turnover frequency, small crystallite size, weak metal-support interaction (WMSI), and simultaneous Ni-Co reducibility.
FUEL PROCESSING TECHNOLOGY
(2022)
Article
Chemistry, Physical
Joao Paulo da S. Q. Menezes, Karine R. Duarte, Mariana M. V. M. Souza
Summary: The study found that the addition of magnesia can reduce the acidity of the catalyst, but high content of magnesia will decrease the reducibility and cobalt dispersion. All catalysts experienced deactivation during the reaction, with the catalyst supported on 30% MgO-Al2O3 showing the most significant deactivation.
Article
Chemistry, Physical
Ommolbanin Alizadeh Sahraei, Alex Desgagnes, Faical Larachi, Maria C. Iliuta
Summary: The study found that 5% Ni-UGSO exhibited excellent stability and high performance in glycerol steam reforming for hydrogen production, surpassing even noble metal-based catalysts such as 1% Rh-UGSO and 1% Ru-UGSO. The synergistic cooperation between incorporated metals and Fe/Mg containing species within UGSO played a key role in activating glycerol and water.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2021)
Article
Engineering, Chemical
Mingming Wang, Xiaoyao Tan, Julius Motuzas, Jiaquan Li, Shaomin Liu
Summary: The study produced metallic nickel hollow fiber membranes with a dense skin layer and porous nickel substrate for hydrogen production from methane steam reforming. The membranes showed high efficiency and stability, making them a promising option for cost-effective hydrogen production at high temperatures.
JOURNAL OF MEMBRANE SCIENCE
(2021)
Article
Engineering, Chemical
Vinayak N. Kalekar, Prakash D. Vaidya
Summary: This study investigates hydrogen production through catalytic aqueous-phase reforming of model compounds of microalgae and activated sludge using Pt/Al2O3 and Pt/Al2O3-CeO2 catalysts in a batch reactor. The results show high H2 yields and gas phase conversions for glycerol, glucose, and alanine, while humic acid exhibits a low tendency to H2 production. These findings aim to enhance the technology for sustainable advanced biofuels production from aqueous biomass streams.
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
(2022)
Article
Agricultural Engineering
Isabella C. A. Souza, Robinson L. Manfro, Mariana M. V. M. Souza
Summary: The study found that bimetallic catalysts can significantly decrease the Ni reduction temperature and increase the H-2 yield during steam reforming reaction of acetic acid, with 15Ni/ZrO2 performing the best. However, contrary to expectations, the performance of bimetallic catalysts was not as good as that of monometallic Ni catalysts.
BIOMASS & BIOENERGY
(2022)
Article
Chemistry, Physical
Mingqiang Chen, Jiaxin Hu, Yishuang Wang, Chunsheng Wang, Zhiyuan Tang, Chang Li, Defang Liang, Wen Cheng, Zhonglian Yang, Han Zhang
Summary: Steam reforming of acetic acid over Ti-modified Ni/Attapulgite catalysts showed promising hydrogen production efficiency, attributed to the synergistic effects among Ti species, Ni active metal, and Attapulgite support, as well as the optimized precipitation sequence determining the surface properties of the catalysts.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2021)
Article
Chemistry, Physical
Georgios Siakavelas, Nikolaos D. Charisiou, Ayesha AlKhoori, Safa Gaber, Victor Sebastian, Steven J. Hinder, Mark A. Baker, Ioannis Yentekakis, Kyriaki Polychronopoulou, Maria A. Goula
Summary: This study investigates the performance of a series of CeO2 catalysts in the oxidative coupling of methane (OCM). The addition of lithium ions changes the reaction pathway and product distribution, enhancing the selectivity towards C2 products. The Li/Mg-Ce catalyst exhibits higher activity due to the presence of intermediate basic sites and surface superoxide species, promoting ethylene production. Incorporation of La3+ suppresses ethylene production.
MOLECULAR CATALYSIS
(2022)
Article
Chemistry, Multidisciplinary
Benjamin Rudolph, Anastasios I. Tsiotsias, Benedikt Ehrhardt, Paolo Dolcet, Silvia Gross, Sylvio Haas, Nikolaos D. Charisou, Maria A. Goula, Simone Mascotto
Summary: Nanoporosity is advantageous for the performance of heterogeneous catalysts. This study focuses on the exsolution of Ni nanoparticles from nanoporous perovskite oxides and demonstrates their effective application in biogas dry reforming. The nanoporous exsolved catalysts exhibit higher activity, stability, and regenerability compared to commercial Ni/Al2O3 catalyst.
Article
Chemistry, Physical
Amvrosios G. Georgiadis, Georgios I. Siakavelas, Anastasios I. Tsiotsias, Nikolaos D. Charisiou, Benedikt Ehrhardt, Wen Wang, Victor Sebastian, Steven J. Hinder, Mark A. Baker, Simone Mascotto, Maria A. Goula
Summary: Ni/LnO(x)-type catalysts were prepared and characterized for the dry reforming of biogas. LNO showed higher catalytic activity compared to other materials. However, it suffered from significant activity loss and reactor blockage. The deactivation was attributed to extensive coke deposition, including disordered carbon and multi-walled carbon nanotubes.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2023)
Article
Chemistry, Multidisciplinary
Catherine Drosou, Ersi Nikolaraki, Vasilios Nikolaou, Evangelia Koilia, Georgios Artemakis, Antonios Stratakis, Antigoni Evdou, Nikolaos D. D. Charisiou, Maria A. A. Goula, Vasilios Zaspalis, Ioannis V. V. Yentekakis
Summary: The oxidation of CO on La1-xSrxMnO3 perovskites (LSMx), either unloaded or loaded with dispersed Ir nanoparticles (Ir/LSMx), was studied in this paper. The physicochemical and structural properties of the catalysts were evaluated, and it was found that Ir/LSMx exhibited better CO oxidation activity. The substitution of La by Sr in the composition of the perovskite and the heating/cooling cycles also affected the catalytic activity.
Article
Energy & Fuels
Dragos Neagu, J. T. S. Irvine, Jiayue Wang, Bilge Yildiz, Alexander K. Opitz, Juergen Fleig, Yuhao Wang, Jiapeng Liu, Longyun Shen, Francesco Ciucci, Brian A. Rosen, Yongchun Xiao, Kui Xie, Guangming Yang, Zongping Shao, Yubo Zhang, Jakob Reinke, Travis A. Schmauss, Scott A. Barnett, Roelf Maring, Vasileios Kyriakou, Usman Mushtaq, Mihalis N. Tsampas, Youdong Kim, Ryan O'Hayre, Alfonso J. Carrillo, Thomas Ruh, Lorenz Lindenthal, Florian Schrenk, Christoph Rameshan, Evangelos I. Papaioannou, Kalliopi Kousi, Ian S. Metcalfe, Xiaoxiang Xu, Gang Liu
Summary: In the past decade, exsolution has become a powerful method for decorating oxide supports with dispersed nanoparticles for energy and catalytic applications. Exsolved nanoparticles have set new standards in terms of activity, durability, and functionality, due to their exceptional anchorage and ability to be produced, transformed, and applied in various ways. When combined with multifunctional supports like perovskite oxides, exsolution becomes a promising platform for advanced energy materials. This review discusses the current status of exsolution and explores future research directions for its application.
JOURNAL OF PHYSICS-ENERGY
(2023)
Article
Environmental Sciences
Eleana Harkou, Sanaa Hafeez, Panayiota Adamou, Zhien Zhang, Anastasios I. Tsiotsias, Nikolaos D. Charisiou, Maria A. Goula, S. M. Al-Salem, George Manos, Achilleas Constantinou
Summary: Greenhouse gas emissions are a major concern for scientists in mitigating global warming. The study focused on investigating different reactors and catalysts for CO2 methanation. 2D models were developed using CFD modelling methods, with good agreement between experimental and simulated results in a packed bed reactor. The coated wall reactor performed worse than the packed bed reactor, with approximately 30% difference in results due to lower residence time. Two membrane reactor configurations were proposed, and lower flow rates in the coated wall reactor resulted in higher conversion values. The optimal bed thickness was found to be 1 mm, and reducing the thickness of the membrane for CO2, H2, and H2O removal showed better conversion results.
ENVIRONMENTAL RESEARCH
(2023)
Article
Chemistry, Physical
Anastasios I. Tsiotsias, Amvrosios G. Georgiadis, Nikolaos D. Charisiou, Maria A. Goula
Summary: This study investigates the adsorption performance of a high surface area zeolitic industrial molecular sieve (IMS) for CO2. The results show a negative correlation between temperature and adsorption capacity, indicating physical adsorption. Theoretical calculations reveal that the Langmuir isotherm, Bangham kinetic model, and Thomas and Yoon-Nelson models are suitable for describing the CO2 adsorption process. The IMS adsorbent material exhibits excellent reusability.
Article
Environmental Sciences
Paraskevi Begou, Vasilios Evagelopoulos, Nikolaos D. Charisiou
Summary: Global studies have shown that the lockdown implemented to tackle the COVID-19 pandemic has had a positive impact on air quality. This study evaluates the impact of COVID-19 restrictions on the air quality of Western Macedonia, Greece, and finds that the concentrations of PM2.5 and PM10 decreased further during the lockdown. This may be attributed to reduced emissions from local mining activities and lignite-fired power plant electricity generation, as well as improved weather conditions.
Review
Chemistry, Physical
Amvrosios G. Georgiadis, Nikolaos D. Charisiou, Maria A. Goula
Summary: This article thoroughly analyzes the application of La-Ni-based perovskite catalysts in the dry reforming of methane (DRM) and discusses the latest developments in this field. The low surface area of perovskite catalysts has been a barrier to commercialization, but new supported and porous perovskite materials have emerged to address this challenge.
Article
Chemistry, Physical
Ayesha A. Alkhoori, Omer Elmutasim, Aasif A. Dabbawala, Michalis A. Vasiliades, Klito C. Petallidou, Abdul-Hamid Emwas, Dalaver H. Anjum, Nirpendra Singh, Mark A. Baker, Nikolaos D. Charisiou, Maria A. Goula, Angelos M. Efstathiou, Kyriaki Polychronopoulou
Summary: In this study, the Ni/CeO2/Al2O3 catalyst system was investigated to understand how different synthesis parameters affect interfacial phenomena and CO2 methanation. Key factors such as alumina texture, ceria loading, and synthesis method of supported Ni were examined to determine their influence on catalyst activity and CH4 selectivity. Among the studied catalysts, Ni-20Ce/mpAl showed promising results with high CO2 conversion rate (70%) and CH4 selectivity (>94%) at 350°C. The researchers found that medium- and high-porosity alumina facilitated better dispersion of ceria, while Ni-CeO2 cogrowth resulted in small Ni crystallites that increased in size over the course of the reaction. This catalyst exhibited advantageous features for CO2 methanation, including a high concentration of oxygen vacancies, significant presence of surface Ce3+ species, and strong CO activation capability.
ACS APPLIED ENERGY MATERIALS
(2023)
Article
Chemistry, Physical
Aasif A. Dabbawala, Omer Elmutasim, Mark A. Baker, Georgios Siakavelas, Dalaver H. Anjum, Nikolaos D. Charisiou, Steven J. Hinder, Catherine J. Munro, Marko Gacesa, Maria A. Goula, Kyriaki Polychronopoulou
Summary: In this study, monometallic and bimetallic composite catalysts were synthesized and thoroughly characterized. The results showed that these composites exhibited excellent catalytic performance and stability, achieving good results in hydrodeoxygenation reactions.
APPLIED SURFACE SCIENCE
(2023)
Article
Engineering, Environmental
G. Siakavelas, N. D. Charisiou, A. AlKhoori, V Sebastian, S. J. Hinder, M. A. Baker, I. Yentekakis, K. Polychronopoulou, M. A. Goula
Summary: This study investigated the OCM performance of methane using different catalysts, demonstrating that the addition of lithium can alter the reaction pathway and significantly enhance the production of ethylene and ethane. The synergistic effects between oxygen species play a crucial role in determining the reaction pathway and product distribution.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2022)
Correction
Chemistry, Applied
Jia Liu, Juntong Dong, Xiaodan Li, Teng Xu, Zhenguo Li, Jeffrey Dankwa Ampah, Mubasher Ikram, Shihai Zhang, Chao Jin, Zhenlong Geng, Tianyun Sun, Haifeng Liu
FUEL PROCESSING TECHNOLOGY
(2024)
Article
Chemistry, Applied
Seba Alareeqi, Daniel Bahamon, Kyriaki Polychronopoulou, Lourdes F. Vega
Summary: This study explores the potential application of single-atom-alloy (SAA) catalysts in bio-oils hydrodeoxygenation refining using density functional theory (DFT) and microkinetic modeling. It establishes the relationships between stability, adsorptive properties, and activity structures for bio-oil derivatives, providing guidance for the synthesis of cost-effective SAA combinations.
FUEL PROCESSING TECHNOLOGY
(2024)
Article
Chemistry, Applied
Bin Hu, Wen -Ming Zhang, Xue-Wen Guo, Ji Liu, Xiao Yang, Qiang Lu
Summary: This study explored the pyrolysis behaviors and mechanisms of different monosaccharides, including arabinose, galactose, galacturonic acid, and glucuronic acid. The roles of structural differences in these monosaccharides were analyzed, and it was found that glucuronic acid undergoes a special C-C bond breaking reaction during pyrolysis. The findings provide a deep understanding of the pyrolysis chemistry of hemicellulose and the role of different branches.
FUEL PROCESSING TECHNOLOGY
(2024)
Review
Chemistry, Applied
Youwei Zhi, Donghai Xu, Guanyu Jiang, Wanpeng Yang, Zhilin Chen, Peigao Duan, Jie Zhang
Summary: Hydrothermal carbonization (HTC) is an effective method for the harmless disposal of municipal sludge (MS) and offers potential applications for the obtained products. Optimizing reaction conditions, coupling with other waste materials, and combining different processes can improve the performance of HTC. Furthermore, HTC contributes to energy recovery and enhances the quality of life cycle assessment.
FUEL PROCESSING TECHNOLOGY
(2024)
Article
Chemistry, Applied
Jia Wang, Jianchun Jiang, Dongxian Li, Xianzhi Meng, Arthur J. Ragauskas
Summary: This study presents a scalable process for converting holocellulose and cellulosic wastes into advanced oxygen-containing biofuels with high furan, cyclic ketone, and ethanol content. By combining hydropyrolysis and vapor-phase hydrodeoxygenation using Pd/Al2O3 as a catalyst, the researchers achieved high yields and conversions. The integrated process holds great promise for biomass waste conversion into advanced biofuels.
FUEL PROCESSING TECHNOLOGY
(2024)
Article
Chemistry, Applied
Florian Held, Jannis Reusch, Steffen Salenbauch, Christian Hasse
Summary: The accurate prediction and assessment of soot emissions in internal combustion engines are crucial for the development of sustainable powertrains. This study presents a detailed quadrature-based method of moments (QMOM) soot model coupled with a state-of-the-art flow solver for the simulation of gasoline engines. The model accurately describes the entire cause-and-effect chain of soot formation, growth and oxidation. Experimental validation and engine cycle simulations are used to identify the root cause of observed soot formation hotspots.
FUEL PROCESSING TECHNOLOGY
(2024)
