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)
Review
Environmental Sciences
Jianbin Luo, Haiguo Zhang, Zhonghang Liu, Zhiqing Zhang, Yajuan Pan, Xiguang Liang, Shizhuo Wu, Hongxiang Xu, Song Xu, Chunmei Jiang
Summary: With the global emphasis on environmental protection and carbon neutrality, there is a need for reductions in pollutants such as carbon dioxide, nitrogen oxide, and particulate matter. Diesel engines are a major contributor to particulate matter pollution, and diesel particulate filter (DPF) technology has proven to be effective in controlling soot. This review discusses the exacerbating effect of particulate matter on human infectious diseases, the latest developments in DPF performance, soot catalytic oxidant schemes, and areas for future research.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2023)
Article
Chemistry, Physical
Juan Carlos Martinez-Munuera, Marina Cortes-Reyes, Avelina Garcia-Garcia
Summary: This research investigates the behavior of different ceria-praseodymia mixed oxides and model catalysts in interaction with 18O2 under different temperatures, simulating conditions in gasoline direct injection (GDI) exhaust gases. The capacity of oxygen activation and uptake varies depending on the catalyst, temperature, praseodymium content, and preparation method. Some ceria-praseodymia formulations show high soot combustion activity, with the involvement of active oxygen species after the 18O2 pulse.
APPLIED CATALYSIS B-ENVIRONMENTAL
(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
Energy & Fuels
Xiaohuan Zhao, Jiaqiang E, Gaoliang Liao, Feng Zhang, Jingwei Chen, Yuanwang Deng
Summary: The study proposes a 3D soot continuous regeneration combustion model under exhaust gas heavy load using UDF function in FLUENT software, investigating 3 different models for simulation study with EDC model showing advantages in terms of turbulent kinetic energy and temperature. The results suggest that EDC model is more suitable for stable laminar flow state conditions.
Article
Chemistry, Applied
Maria Laura Godoy, Viviana G. Milt, Eduardo E. Miro, Ezequiel D. Banus
Summary: This work focuses on the development of a stacked AISI 304 stainless steel wire mesh structure with oxidizing and filtering capacity, using Co and Ce oxide catalysts as a new alternative to the current DOC-DPF system. The research successfully scaled up the system and demonstrated its ability to reduce particulate matter emitted by diesel engines below legal limits.
Article
Environmental Sciences
Xiaohuan Zhao, Hongyan Zuo, Guohai Jia
Summary: Continuous pulsation regeneration combustion is used for sine and cosine simulation study. The data shows that the pressure uniformity is better under sine condition, with lower regeneration temperature and Reynolds number. Heat transfer capacity is stronger under sine pressure condition. The regeneration efficiency gradually increases under sine condition, achieving complete regeneration.
Article
Environmental Sciences
Ibrahim Yildiz, Hakan Caliskan, Kazutoshi Mori
Summary: The study demonstrates the effectiveness of a cordierite-based diesel particulate filter (CPF) in reducing total particle concentration, soot concentration, CO and HC emissions from a diesel engine. However, the utilization of CPF also leads to an increase in CO2 and NOx emissions due to oxidation processes within the filter.
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2021)
Article
Energy & Fuels
David Robert Emberson, Jan Wyndorps, Ahfaz Ahmed, Karl Oskar Pires Bjorgen, Terese Lovas
Summary: The study demonstrates that using glycerol as an additive to diesel fuel has the potential to suppress the formation of soot/PM. The diesel/glycerol emulsion showed differences in ignition delay and AHRR compared to pure diesel, with no significant impact on brake thermal efficiency, and a notable reduction in particles with diameters greater than 25 nm.
Article
Thermodynamics
Xiaohuan Zhao, Jiang Jiang, Hongyan Zuo, Guohai Jia
Summary: This paper investigates the effects of oxygen concentration and regeneration temperature on continuous pulsation regeneration of DPF for heavy-duty trucks. The analysis includes the pressure trend, temperature field change, regeneration reaction rate, and the dynamic regeneration oxygen concentration. Complete soot regeneration can be achieved under different oxygen concentration and regeneration temperature. The results determine the regeneration oxygen concentration and regeneration temperature for achieving complete regeneration of DPF.
Article
Thermodynamics
Mi Zwe Mon Phyo, Phyo Wai, Myat Hsu Thin, Ban-Seok Oh, Watanyoo Phairote, Mek Srilomsak, Chinda Charoenphonphanich, Manop Masomtob, Sompong Srimanosaowapak, Hidenori Kosaka, Preechar Karin
Summary: This study investigates the combustion and exhaust behaviors of a diesel engine with various diesel fuels and a non-catalytic partial flow through a diesel particulate filter. The study characterizes the particulate matter using microscopy and spectroscopy techniques. The results show that the non-catalytic partial flow through a diesel particulate filter can effectively reduce the particle emissions from the diesel engine.
CASE STUDIES IN THERMAL ENGINEERING
(2023)
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
Chemistry, Applied
Xiaochen Wang, Jianbing Gao, Hao Chen, Zhanming Chen, Peng Zhang, Zhenbin Chen
Summary: The study found that increasing methanol substitution can lower activation energy and increase soot oxidation reactivity, which is closely related to changes in primary particle size and fringe parameters. This suggests that the ignition of soot oxidation is highly dependent on its morphology and nanostructure, showing advantages for engine fuel economy improvement in diesel/methanol dual-fuel operation.
FUEL PROCESSING TECHNOLOGY
(2022)
Article
Chemistry, Applied
Valeria Di Sarli, Gianluca Landi, Almerinda Di Benedetto, Luciana Lisi
Summary: This study investigated the catalytic performance of metal-promoted CeO2 washcoated silicon carbide diesel particulate filters in soot oxidation. The amount and preparation method of the metal (Ag or Cu) were found to significantly influence the catalytic activity, with Ag-promoted catalysts prepared using method B showing the highest activity. The results suggest that the method of preparation plays a crucial role in enhancing the catalytic performance of the filters.
TOPICS IN CATALYSIS
(2021)
Article
Engineering, Environmental
Zhongwei Meng, Wei Wang, Bosong Zeng, Zhongqiang Bao, Yizhang Hu, Juan Ou, Jinlong Liu
Summary: This study focused on the particle emission characteristics during passive regeneration of the catalytic diesel particulate filter (CDPF). The results showed that the regeneration temperature and soot load had a significant impact on the particle emissions, with higher temperatures leading to increased particle oxidation and higher particle numbers. Increasing the soot load enhanced the capture effect of incoming particles but also led to increased catalytic oxidation and destruction of the particle layer structure, resulting in higher discharged particle emissions.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Chemistry, Physical
Paulo C. de Sousa Filho, Juliette Alain, Godefroy Lemenager, Eric Larquet, Jochen Fick, Osvaldo A. Serra, Thierry Gacoin
JOURNAL OF PHYSICAL CHEMISTRY C
(2019)
Article
Chemistry, Applied
Samira G. Brandao, Marcos A. Ribeiro, Rafael Perrella, Paulo C. de Sousa Filho, Priscilla P. Luz
JOURNAL OF RARE EARTHS
(2020)
Article
Dentistry, Oral Surgery & Medicine
Lourdes M. G. Garcia, Ana Paula T. de Godoi, Osvaldo A. Serra, Juliana F. de Lima, Leonardo de P. A. Almeida, Tatiane C. Dotta, Silmara A. M. Corona, Andrea C. dos Reis, Alma B. C. E. B. Catirse
JOURNAL OF ESTHETIC AND RESTORATIVE DENTISTRY
(2020)
Article
Materials Science, Multidisciplinary
Rosiane K. S. Costa, Stefani C. Teles, Paulo C. de Sousa Filho, Anderson Dias, Kisla P. F. Siqueira
MATERIALS RESEARCH BULLETIN
(2019)
Article
Chemistry, Multidisciplinary
Thomas W. Chamberlain, Rafael Perrella, Tamires M. Oliveira, Paulo C. de Sousa Filho, Richard Walton
Summary: The yttrium organic framework is stable under hydrothermal and air conditions, and can be used as a ratiometric luminescent thermometer and a D2O sensor with high sensitivity.
CHEMISTRY-A EUROPEAN JOURNAL
(2022)
Article
Chemistry, Inorganic & Nuclear
Juliana Fonseca de Lima, Fernanda V. S. Moreno, Bruno A. T. Menezes, Jader da Silva Barbosa, Matthew C. Waddington, Sian A. Franklin, Guy J. Clarkson, Marc Walker, Osvaldo A. Serra, Richard Walton
Summary: The synthesis of three coordination polymers of cerium(III) with the ligand pyridine-2,4,6-tricarboxylate (PTC) is reported, with different crystal structures obtained under hydrothermal and solvothermal conditions. The materials exhibit good thermal stability and oxidation resistance, making them promising candidates for various applications.
DALTON TRANSACTIONS
(2021)
Article
Chemistry, Multidisciplinary
Rafael Vieira Perrella, Marc Walker, Thomas W. Chamberlain, Richard Walton, Paulo Cesar de Sousa Filho
Summary: By defect engineering of YVO4:Tb3+ nanoparticles, it is possible to overcome the quenching process and achieve luminescence. The microstructure and defect density of nanoparticles play a crucial role in the performance of phosphors.
Article
Chemistry, Multidisciplinary
Sandro K. Otani, Thalyta T. Martins, Sergio R. Muniz, Paulo C. de Sousa Filho, Fernando A. Sigoli, Rene A. Nome
Summary: In this study, we use stochastic dynamics and nonlinear optical simulations to investigate the non-equilibrium trajectories of individual Yb (III):Er (III) colloidal particles driven by two-dimensional dynamic optical traps. We also analyze the effects of fluctuations at the single-particle level by examining position trajectories and time-dependent upconversion emission intensities.
FRONTIERS IN CHEMISTRY
(2022)
Article
Thermodynamics
Samara da Silva Montani, Juliana Fonseca de Lima, Fatima Maria Zanon Zotin, Luz Amparo Palacio
Summary: The synthesis of MIL-53(Cu), a metal-organic framework (MOF) with terephthalate as a ligand, was confirmed by XRD, FTIR, SEM, and chemical analysis. The MOF exhibited higher stability under inert atmosphere and generated metallic copper under reducing atmosphere. Under oxidizing atmosphere, a mixture of copper oxides (Cu2O and CuO) was obtained, with Cu2O as an intermediate. The thermal treatment of the MOF produced CO2 and benzene as the main volatile compounds and allowed for the control of the phases formed (metallic Cu or CuO).
JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY
(2023)
Article
Chemistry, Multidisciplinary
Gabriela Guida, Steven Huband, Marc Walker, Richard I. Walton, Paulo C. de Sousa Filho
Summary: This study demonstrates the tuning of various properties of (Y,Eu)VO4 structures through colloidal conversion of rare earth hydroxycarbonates in water/ethylene glycol suspensions. By controlling the size and aggregation of hydroxycarbonate precursors, the amorphous to crystalline conversion can be directed at 1 atm/95 degrees C. Additionally, a template effect leads to the formation of solids with high oxygen defect densities and high-porosity (Y,Eu)VO4 nanoparticles with expanded unit cells.
Article
Chemistry, Inorganic & Nuclear
Samira S. F. Carvalho, Ana Carolina C. Rodrigues, Juliana F. Lima, Nakedia M. F. Carvalho
INORGANICA CHIMICA ACTA
(2020)
Article
Chemistry, Inorganic & Nuclear
Rafael Vieira Perrella, Paulo Cesar de Sousa Filho
DALTON TRANSACTIONS
(2020)
Article
Chemistry, Multidisciplinary
Bruno A. T. Menezes, Daniel E. B. Moreira, Hugo A. Oliveira, Lippy F. Marques, Juliana F. Lima
JOURNAL OF THE BRAZILIAN CHEMICAL SOCIETY
(2020)
Article
Chemistry, Multidisciplinary
Paulo C. de Sousa Filho, Ayla R. B. S. Galaco, Osvaldo A. Serra
