Article
Materials Science, Coatings & Films
M. Angeles Stegmayer, M. Laura Godoy, John F. Munera, Eduardo E. Miro, Viviana G. Milt
Summary: In this study, CeO2 nanofibers were directly grown in situ on cordierite monoliths by hydrothermal synthesis for diesel soot combustion. The results showed that mechanical stirring during the synthesis was necessary to obtain desired nanofibers and ensure uniform coverage and good anchoring to the substrate. The monolithic catalyst with CeO2 nanoarray exhibited catalytic oxidation activity similar to bare CeO2 fibers.
SURFACE & COATINGS TECHNOLOGY
(2022)
Article
Energy & Fuels
Jiangjun Wei, Chenyang Fan, Yuan Zhuang, Zheng Fu, Ze Guan, Haizhao Li, Deliang Li, Yejian Qian
Summary: The mechanism of soot catalytical oxidation was investigated through various experiments, including temperature-programmed-oxidation (TPO), X-ray photoelectron spectroscopy, Fourier Transform Infrared Spectrometer, and Raman scattering spectrometer. It was found that ceria catalyst enhances the consumption of amorphous carbon and improves the structure and composition of soot surface, facilitating the oxidation reactions.
Article
Energy & Fuels
Ziming Yang, Timothy H. Lee, Yikai Li, Wan-Ting Chen, Yuanhui Zhang
Summary: Hydrothermal liquefaction (HTL) can convert wet biowaste into biocrude diesel, serving as a massive source of renewable energy. HTL fuel shows similar performance and emission levels to diesel in diesel engines, without the need for major modifications to the engine control strategy. However, under low temperature and low oxygen conditions, the soot luminosity peak of HTL fuel is significantly higher than that of diesel.
Article
Engineering, Environmental
Kai Zhang, Yishu Xu, Yu Li, Yang Liu, Bowen Wang, Huakun Wang, Jingjing Ma, Xiaobei Cheng
Summary: The morphological characteristics and nanostructure of soot particles in pure n-heptane and n-heptane/ammonia co-flow diffusion flames were analyzed and compared. It was found that the addition of ammonia resulted in a decrease in the size of primary soot particles and soot aggregates, and a lower fractal dimension of soot aggregates. The introduction of ammonia also led to a more disordered microcrystal structure and higher oxidation reactivity of soot particles.
JOURNAL OF HAZARDOUS MATERIALS
(2023)
Article
Thermodynamics
Xiaohuan Zhao, Hongyan Zuo, Guohai Jia
Summary: In this paper, a nonlinear soot regeneration combustion pressure model (NSRCMP model) is established and used for Diesel Particulate Filter (DPF) simulation study. The study finds that cell density and permeability have significant effects on soot loading time and pressure drop, with cell density being a key parameter affecting the overall system pressure.
Article
Agricultural Engineering
G. Zamboni, M. Capobianco
Summary: The study identified that a 40% blend of UCOME with conventional diesel led to the highest brake thermal efficiency, reduced NOX emissions, and advantageous combustion parameters. Increasing biodiesel content resulted in lower soot emissions and unaffected combustion stability.
BIOMASS & BIOENERGY
(2021)
Article
Thermodynamics
Ziming Yang, Chunguang Fei, Yikai Li, Dongfang Wang, Chenhan Sun
Summary: The effects of blending different long carbon-chain alcohols into diesel on combustion characteristics and soot emissions under different ambient temperatures were investigated. It was found that the physical and chemical properties of alcohols have a competitive effect on the combustion characteristics of alcohol-diesel blended fuels. The combustion pressures of alcohol-diesel blends were lower than pure diesel, especially under higher ambient temperatures. Alcohol blending improved combustion efficiency. The ignition delay times decreased with longer carbon chain lengths of alcohols under low ambient temperature conditions, whereas this trend was reversed at higher ambient temperatures. Propanol or hexanol blending inhibited soot generation at low ambient temperatures, while other alcohols promoted it. Interestingly, all alcohol-diesel blends inhibited soot generation at high ambient temperatures, with propanol being the most effective.
Article
Energy & Fuels
Heeje Seong, Buyu Wang, Michael Pamminger, Thomas Wallner
Summary: Gasoline compression ignition (GCI) technology shows slightly lower soot emissions and a more favorable NOx-soot trade-off compared to diesel during high-load combustion, despite similar characteristics in particle distribution shapes, carbon crystalline structures, and primary particle sizes between gasoline and diesel soot samples.
Article
Engineering, Environmental
Georgios A. Kelesidis, Amogh Nagarkar, Una Trivanovic, Sotiris E. Pratsinis
Summary: Soot emissions from aircraft engines contribute to global warming through the formation of contrail cirrus clouds. This study explores the elimination of such emissions through N-2 injection at the exhaust of enclosed spray combustion of jet fuel. It is found that injecting N-2 containing 5% O-2 enhances the formation of PAHs on soot surface and increases soot number density and volume fraction. However, increasing the O-2 concentration to 20% or 25% enhances oxidation and nearly eliminates soot emissions.
ENVIRONMENTAL SCIENCE & TECHNOLOGY
(2023)
Article
Chemistry, Physical
Chunlei Zhang, Di Yu, Chao Peng, Lanyi Wang, Xuehua Yu, Yuechang Wei, Jian Liu, Zhen Zhao
Summary: This paper discusses the importance of catalytic after-treatment exhaust technology in removing diesel soot particles, focusing on the preparation methods and applications of three-dimensional ordered macroporous catalysts. The latest research progress on the catalytic performance and mechanism of these catalysts for soot particle combustion is summarized, and the future development trends are proposed.
APPLIED CATALYSIS B-ENVIRONMENTAL
(2022)
Article
Engineering, Environmental
M. Pilar Orihuela, Paolo Miceli, Joaquin Ramirez-Rico, Debora Fino, Ricardo Chacartegui
Summary: This study utilized biomorphic silicon carbide to fabricate a wall-flow filter with ceria-based catalytic coatings of two different morphologies, demonstrating a reduction in regeneration temperature and enhanced soot oxidation. The influence of substrate arrangement on regeneration performance and oxidative capacity of the coating was analyzed, offering possibilities for further reducing soot oxidation temperature through engineered ceria morphology and optimal substrate arrangement.
CHEMICAL ENGINEERING JOURNAL
(2021)
Article
Energy & Fuels
Deliang Li, Jiangjun Wei, Haiwang Chen, Chenfang Wang, Chunmei Wang
Summary: This paper investigates the restructuring of soot particles from a diesel engine operating at low and high loads, and analyzes the changes in primary particle diameter, radius of gyration, aggregation parameters, and fractal dimension of the soot particles during aging. The results show that the low-load soot particles tend to increase in size initially and then stabilize, while the high-load soot particles first decrease and then increase in size. The low-load soot particles age more quickly and develop towards a more compact aggregation compared to the high-load soot particles.
Article
Energy & Fuels
Zhaowen Wang, Xiaojie Li, Lin Xiang, Yuhan Huang, Bing Lang, Xiaobei Cheng, Jie Zhang
Summary: This study compares the spray combustion characteristics of neat diesel, neat RP-3 and RP-3/diesel blends under different conditions. The results show that the blending ratio of RP-3 has significant effects on the spray and combustion processes. RP-3/diesel blends exhibit faster evaporation and lower soot emissions than neat diesel and RP-3 alone.
Article
Materials Science, Ceramics
Chaoqian Ai, Yifan Du, Bolin Wen, Ronglu Shu, Liping Cao, Wei Wang
Summary: Mullite whiskers were prepared on the wall of cordierite honeycomb ceramics to form a hierarchical microstructure. Co/CZ@M/C sample exhibited good structural stability and stable catalytic performance, showing potential application in the diesel particulate filter field.
CERAMICS INTERNATIONAL
(2022)
Article
Energy & Fuels
Chunmei Cao, Hua Yang, Jieyu Xiao, Xingchuan Yang, Baozeng Ren, Li Xu, Guoji Liu, Xingang Li
Summary: A series of potassium promoted transition metal oxide crossed nanosheets showed higher catalytic activity for soot oxidation, with KCo-NS performing the best. The interaction between potassium and transition metal oxides generated more oxygen vacancies and active oxygen species. Different catalysts displayed varying catalytic abilities under O-2/N-2 atmosphere or with the introduction of NO.
Article
Chemistry, Physical
Simelys Hernandez, Sitaramanjaneya Mouli Thalluri, Adriano Sacco, Samir Bensaid, Guido Saracco, Nunzio Russo
APPLIED CATALYSIS A-GENERAL
(2015)
Article
Chemistry, Physical
Marco Piumetti, Murid Hussain, Debora Fino, Nunzio Russo
APPLIED CATALYSIS B-ENVIRONMENTAL
(2015)
Article
Chemistry, Physical
Marco Piumetti, Samir Bensaid, Nunzio Russo, Debora Fino
APPLIED CATALYSIS B-ENVIRONMENTAL
(2015)
Article
Chemistry, Physical
Marco Piumetti, Debora Fino, Nunzio Russo
APPLIED CATALYSIS B-ENVIRONMENTAL
(2015)
Article
Engineering, Environmental
Bernardo Ruggeri, Federico Battista, Milena Bernardi, Debora Fino, Giuseppe Mancini
CHEMICAL ENGINEERING JOURNAL
(2015)
Article
Engineering, Environmental
Murid Hussain, Parveen Akhter, Nunzio Russo, Guido Saracco
CHEMICAL ENGINEERING JOURNAL
(2015)
Article
Engineering, Environmental
P. Miceli, S. Bensaid, N. Russo, D. Fino
CHEMICAL ENGINEERING JOURNAL
(2015)
Article
Energy & Fuels
M. Hussain, F. A. Deorsola, N. Russo, D. Fino, R. Pirone
Review
Chemistry, Physical
Debora Fino, Samir Bensaid, Marco Piumetti, Nunzio Russo
APPLIED CATALYSIS A-GENERAL
(2016)
Article
Chemistry, Physical
Sitaramanjaneya Mouli Thalluri, Simelys Hernandez, Samir Bensaid, Guido Saracco, Nunzio Russo
APPLIED CATALYSIS B-ENVIRONMENTAL
(2016)
Article
Engineering, Electrical & Electronic
D. Valerini, S. Hernandez, F. Di Benedetto, N. Russo, G. Saracco, A. Rizzo
MATERIALS SCIENCE IN SEMICONDUCTOR PROCESSING
(2016)
Article
Green & Sustainable Science & Technology
Giulia Grisolia, Debora Fino, Umberto Lucia
Summary: This study evaluates the potential of producing biomethane from rice straw through anaerobic digestion and introduces the concept of "rice straw barrel" as a metric approach to assigning economic value to this waste. The improvement in sustainability by using rice straw barrels is analyzed based on a new indicator called the Thermodynamic Human Development Index (THDI).
Article
Chemistry, Applied
Qingyuan Zheng, Jack H. Williams, Scott Elgersma, Mick D. Mantle, Andrew J. Sederman, G. Leendert Bezemer, Constant M. Guedon, Lynn F. Gladden
Summary: In this study, a pilot-scale fixed-bed reactor compatible with NMR/MRI was developed for Fischer-Tropsch synthesis. Multiple magnetic resonance techniques were applied to quantitatively characterize different product species within catalyst pellets, providing valuable information for catalyst and reactor optimization.
Article
Chemistry, Applied
Lisa Ramisch, Sebastian Pfaff, Sabrina M. Gericke, Edvin Lundgren, Johan Zetterberg
Summary: We present a combination of optical operando techniques that allow simultaneous measurement of adsorbed species on catalyst surfaces, monitoring of surface oxide formation, and imaging of the gas phase above the catalyst surface. The experimental setup was validated by studying CO oxidation on Pd(100) at different pressures, revealing the effects of pressure on the heterogeneous catalytic reaction.
Article
Chemistry, Applied
Marta Paniagua, Gabriel Morales, Juan A. Melero, Daniel Garcia-Salgado
Summary: The influence of common impurities in levulinic acid on the catalytic performance of different acid catalysts for bio-jet fuel production was studied. It was found that furfural had the greatest detrimental effect on catalyst performance, while propyl-sulfonic acid-modified SBA-15 and sulfonic acid resin Amberlyst-70 showed good regeneration ability.
Article
Chemistry, Applied
Jesus Tapiador, Pedro Leo, Guillermo Calleja, Gisela Orcajo
Summary: This study presents a new MOF material, Zn-URJC-13, with acid and basic sites, permanent porosity, and high affinity to CO2 molecules. The Zn-URJC-13 catalyst exhibits efficient performance in CO2 cycloaddition reactions and can be reused multiple times.
Article
Chemistry, Applied
Dan Zhao, Vita A. Kondratenko, Dmitry E. Doronkin, Shanlei Han, Jan-Dierk Grunwaldt, Uwe Rodemerck, David Linke, Evgenii V. Kondratenko
Summary: This study demonstrates the potential of cheap and commercially available Zr or Ti-based supports and ZnO to serve as active and selective catalysts for propane dehydrogenation (PDH). The catalytically active species formed in situ under PDH conditions consist of isolated ZnOx. ZnOx on the surface of LaZrOx shows the highest rate of propene formation.
Article
Chemistry, Applied
Hanbyeol Kim, Jung Rae Kim, Young-Kwon Park, Jeong-Myeong Ha, Jungho Jae
Summary: In this study, metal phosphates were used as catalysts for biomass conversion to produce sustainable aromatics through DielsAlder cycloaddition reactions. The effects of synthesis method, activation method, and P/Ti molar ratio on the structure and acid properties of titanium phosphate catalysts were systematically studied. The mesoporous titanium phosphate catalyst synthesized by hydrothermal method at 180℃ for 12 h followed by ethanol refluxing at 60℃ for 24 h at a molar P/Ti ratio of 1 showed the highest surface area and acid site density.
Article
Chemistry, Applied
Yasin Khani, Sumin Pyo, Kwang-Eun Jeong, Chul-Ung Kim, Moonis Ali Khan, Byong-Hun Jeon, Kun-Yi Andrew Lin, Siyoung Q. Choi, Young-Kwon Park
Summary: A protonated form of Zeolite Socony Mobil-5 (H-ZSM-5) catalyst was synthesized through a hydrothermal method using different sources of silica. The effect of loading the catalyst with yttrium, samarium, and gadolinium on the acidic properties was investigated. Among the metal-loaded catalysts, the Sm/LHZ catalyst showed the best performance in the methanol to propylene conversion due to its high amount of weak and intermediate acid sites, while the Gd-LHZ catalyst increased the selectivity towards ethane and propane.
Article
Chemistry, Applied
Michael Franc, Ivana Cisarova, Jan Vesely
Summary: The present study investigates an enantioselective cyclization of enals with imidazolone derivatives catalyzed by a combination of achiral Pd(0) complex and chiral secondary amine. Corresponding spirocyclic imidazolones were produced in high yields with moderate diastereoselectivity and excellent enantioselectivity. The developed co-operative catalytic methodology provides a highly substituted spirocyclic scaffold with four stereogenic centers under mild conditions.
Article
Chemistry, Applied
Mauro Alvarez, Jennifer Cueto, David P. Serrano, Pablo Marin, Salvador Ordonez
Summary: This study focuses on improving the formulation and preparation methods of catalysts for the production of dimethyl carbonate. By using suitable catalyst preparation methods and copper salt precursors, the researchers successfully produced catalysts with optimal performance for dimethyl carbonate formation.
Article
Chemistry, Applied
Claudia J. Keijzer, Luc C. J. Smulders, Dennie Wezendonk, Jan Willem de Rijk, Petra E. de Jongh
Summary: This study investigates the catalytic behavior of alpha-alumina supported silver catalysts in the presence of chloride. It is found that the particle size of silver can affect the selectivity of the catalyst, but different strategies lead to different results. In this size range, the selectivity of ethylene oxide is correlated to the Ag : Al2O3 surface ratio.
Article
Chemistry, Applied
Takeshi Aihara, Wataru Aoki, Michikazu Hara, Keigo Kamata
Summary: The development of acid-base bifunctional catalysts is important for promoting specific chemical transformations. In this study, Ti-based perovskite oxides were synthesized and used as catalysts for two C-C bond-forming reactions (cyanosilylation and Knoevenagel condensation). The highly pure SrTiO3 nanoparticles with a high specific surface area exhibited the highest catalytic performance, and could be easily recovered and reused.
Article
Chemistry, Applied
Olga Gorlova, Petra Pribylova, Eliska Vyskocilova, Katerina Peroutkova, Jan Kohout, Iva Paterova
Summary: This study investigates the Baeyer-Villiger oxidation of beta-cyclocitral using tin-modified mixed oxides as catalysts. The optimal reaction conditions and the effects of various factors on the reaction course and selectivity were determined. The results show that tin-modified mixed oxides exhibit high activity and selectivity in the oxidation reaction.
Article
Chemistry, Applied
M. I. Avila, M. M. Alonso-Doncel, L. Briones, G. Gomez-Pozuelo, J. M. Escola, D. P. Serrano, A. Peral, J. A. Botas
Summary: The catalytic fast pyrolysis of lignin using ion-exchanged zeolite catalysts showed significant improvements in bio-oil quality and the production of aromatic hydrocarbons and oxygenated compounds.
Article
Chemistry, Applied
Enrico Catizzone, Giorgia Ferrarelli, Paolo Bruno, Girolamo Giordano, Massimo Migliori
Summary: The acid-catalysed alcohol conversion reaction is a promising route for de-fossilization strategies. Research on pure alcohol conversion and simultaneous dehydration of mixed alcohols have shown different product compositions, with the type and distribution of acid sites affecting the reaction mechanism.
Article
Chemistry, Applied
Alireza Ranjbari, Juho Kim, Jihee Yu, Jiyun Kim, Mireu Park, Nayoung Kim, Kristof Demeestere, Philippe M. Heynderickx
Summary: This study investigated a novel kinetic model for the adsorption and photocatalytic degradation of methyl orange using commercial ZnO and reduced ZnO photocatalysts. The results provided new insights into the interaction of catalysts with molecules of different charges and compared with a previous study on methylene blue. The presence of oxygen vacancies in ZnO and their effects on adsorption and photocatalytic degradation were analyzed, and the photocatalytic degradation rate of reduced ZnO was found to increase significantly.
