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.
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
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
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
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
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
A. Serve, A. Boreave, B. Cartoixa, K. Pajot, P. Vernoux
Summary: This study investigates the catalytic activity of Ag nanoparticles dispersed on various supports with different redox properties for soot combustion. The results show that the catalytic performance is related to the Ag surface concentration, and different contact modes have different impacts on catalytic performances. Moreover, the catalysts show remarkable hydrothermal stability after ageing.
Article
Energy & Fuels
Ge Xiao, Yang Wang, Heng Zhang, Wuqiang Long, Dongsheng Dong, Bo Li
Summary: In this study, the regeneration characteristics of CDPF through O-2 and NO2 in plateau environment were investigated by measurement and simulation analysis at different altitudes. The results show that regeneration balance can only be achieved under certain conditions, and the exhaust temperature and the mass ratio of NOx to PM are the dominant factors affecting the regeneration efficiency.
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
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
Chemistry, Physical
Zhengzheng Yang, Zhi Chen, Yumeng Huang, Na Zhang, Yunxiang Li, Huangwei Zhang
Summary: In this study, a hierarchically porous ceria-zirconia composite with micrometer scaled macroporous structure, CZ-8, was developed for enhancing catalyst-soot contact efficiency and soot catalytic combustion performance. The CZ-8 catalyst showed definite micrometer scaled macroporous (0.5-5.0 mu m) and interconnected mesoporous (-20 nm) structure. Compared to conventional mesoporous ceria-zirconia catalysts, the CZ-8 catalyst allowed the entry of filamentous diesel soot particulate into micrometer-scaled pores, improving contact efficiency, and facilitating oxygen-soot contact through mesopores. The CZ-8 catalyst displayed a significantly lower light-off temperature and better soot catalytic combustion performance, suggesting the promising potential of hierarchically porous structures in controlling diesel exhaust particulate emissions.
MOLECULAR CATALYSIS
(2023)
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
Engineering, Chemical
Yunrong Zhao, Aijing Ma, Gangguo Zhao, Jianshen Wang, Shaopu Hu, Dan Liu, Alex T. Kuvarega, Bhekie B. Mamba, Jianzhou Gui
Summary: In this study, a uniform acanthosphere-like CeO2 catalyst endowed with porous spikes was designed and prepared, showing outstanding catalytic performance and high thermal stability.
SEPARATION AND PURIFICATION TECHNOLOGY
(2024)
Article
Chemistry, Applied
Gianluca Landi, Valeria Di Sarli, Luciana Lisi
Summary: The study investigates the combined effects of initial temperature and catalyst activity on the regeneration dynamics of a catalytic diesel particulate filter (DPF) using CFD-based simulations. Results show different regeneration behaviors based on catalyst activity, with faster regeneration at high activity and a trade-off between time and peak temperature at intermediate activity. Optimal regeneration conditions involve setting the filter's initial temperature equal to the inlet gas temperature.
TOPICS IN CATALYSIS
(2021)
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)
