Article
Chemistry, Multidisciplinary
Jihene Arfaoui, Abdelhamid Ghorbel, Carolina Petitto, Gerard Delahay
Summary: Higher NO-SCR performances can be obtained between 200 and 500 degrees C over the new ternary MoO3-CeO2-ZrO2 and WO3-CeO2-ZrO2 catalysts. Above 90 % NO conversions into essentially N-2 (>= 97 %) are achieved between 350 and 500 degrees C over the most efficient MoO3-CeO2-ZrO2 ternary catalyst.
JOURNAL OF INDUSTRIAL AND ENGINEERING CHEMISTRY
(2021)
Article
Environmental Sciences
Yuehan Qiao, Chenxi Wang, Gang Lyu, Ziming Jing, Yunqiang Li, Chonglin Song
Summary: The aim of this study was to investigate the reaction kinetics of diesel exhaust soot during oxidation process. The oxidation kinetics were determined using a thermogravimetric analyzer under non-isothermal conditions. Raman spectroscopy and high-resolution transmission electron microscopy were used to analyze the changes in soot structure during oxidation. The results showed that the kinetics of diesel soot oxidation followed a three-step process, and the proposed kinetic models provided more accurate predictions than the common first-order model.
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)
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
Thermodynamics
Pan Wang, Zonglin Li, Chengcheng Ao, Lili Lei
Summary: This study numerically investigated the performance of CeO2-based catalyzed diesel particulate filter (CDPF) under hydrothermal aging conditions using a zero-dimensional model. The results showed that hydrothermal aging increases the regeneration temperature and decreases the soot oxidation rate.
PROCEEDINGS OF THE COMBUSTION INSTITUTE
(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
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, Multidisciplinary
Miqdam Chaichan, Mohammed A. Fayad, Amged Al Ezzi, Hayder A. Dhahad, T. Megaritis, Talal Yusaf, Ahmed Al-Amiery, Wan Nor Roslam Wan Isahak
Summary: The combustion properties and emission characteristics of engines using rapeseed methyl ester (RME) and ultralow sulfur diesel (ULSD) were compared. RME combustion showed a higher heat release rate and shorter ignition delay period compared to ULSD combustion. However, RME combustion also resulted in increased HC and NOx formation at high loads. Additionally, the size of emitted particulate matter was smaller for ULSD.
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
Chemistry, Applied
Tengfei Wang, Run Chen, Hao Jiang, Xinqi Qiao, Tie Li
Summary: This study uses high resolution transmission electron microscopy to analyze the formation mechanism of soot particles during the combustion of commercial diesel fuel and emulsified fuel with water-containing ethanol. The results indicate that the soot particles derived from emulsified fuel are less mature but have higher oxidation reactivity compared to diesel fuel.
FUEL PROCESSING TECHNOLOGY
(2022)
Article
Energy & Fuels
Xin Su, Hao Chen, Nan Gao, Meijuan Ding, Xiaochen Wang, Hongming Xu, Peng Zhang
Summary: This study investigates the use of cyclohexanol-diesel blends in diesel engines. The results show that the blends have a longer ignition delay and a shorter combustion duration, and increase NOx emissions. However, with the appropriate blending ratio and injection timing, the blended fuel can reduce particulate emissions.
Article
Energy & Fuels
Qiang Liu, Aijing Ma, Chengwei Liu, Yufei Li, Dan Liu, Jianzhou Gui
Summary: A catalytic combustion approach using urchin-structured Fe2O3 microspheres supported potassium (K/Fe2O3 US) was developed for diesel soot elimination, showing superior activities with ignition temperatures at 300°C and 351°C for 10% and 50% conversion rates, respectively. The urchin structure improved the contact efficiency between catalyst and soot, while potassium loading increased active oxygen species for enhanced oxidation properties.
Article
Thermodynamics
Fabian Hagen, Fabian Hardock, Sergej Koch, Nadia Sebbar, Henning Bockhorn, Alexandra Loukou, Heiko Kubach, Rainer Suntz, Dimosthenis Trimis, Thomas Koch
Summary: The development of Gasoline Direct Injection and Diesel Direct Injection engines aims at reducing nitrogen oxides and particulate emissions due to increasingly strict global emission regulations. Particulate Filters (GPF and DPF) offer solutions for reducing particulate emissions and are being promoted intensively. Soot reactivity under oxidation conditions significantly affects the regeneration behavior of particulate filters, with nanostructural characteristics playing a crucial role.
FLOW TURBULENCE AND COMBUSTION
(2021)
Article
Energy & Fuels
Xiaochen Wang, Ying Wang, Yuanqi Bai, Funan Guo, Dongxing Wang
Summary: The study showed that particulates emitted from gasoline/diesel dual-fuel combustion were easier to oxidize and had higher volatile organic fraction compared to diesel particles. It was also found that particles at lower engine speed exhibited higher oxidation reactivity and volatile organic fraction. The nanostructure of dual-fuel soot contributed to its increased oxidative reactivity, with a more amorphous nature being a key factor.
Article
Environmental Sciences
Boxin Zhang, Indu Aravind, Sisi Yang, Sizhe Weng, Bofan Zhao, Christi Schroeder, William Schroeder, Mark Thomas, Ryan Umstattd, Dan Singleton, Jason Sanders, Heejung Jung, Stephen B. Cronin
Summary: This study reports the enhancement of electrostatic precipitation of diesel engine exhaust particulates using high voltage nanosecond pulse discharge and a negative direct current bias voltage. The plasma-enhanced electrostatic precipitator demonstrated high remediation values at low DC voltages, and it can be made smaller without sacrificing performance.
SCIENCE OF THE TOTAL ENVIRONMENT
(2022)
Article
Engineering, Chemical
Sha Zou, Yi Cao, Li Lan, Mengmeng Sun, Sijie Chen, Zhengzheng Yang, Baoqiang Xu, Yaoqiang Chen
CANADIAN JOURNAL OF CHEMICAL ENGINEERING
(2015)
Article
Chemistry, Physical
Yi Cao, Sha Zou, Li Lan, Zhengzheng Yang, Haidi Xu, Tao Lin, Maochu Gong, Yaoqiang Chen
JOURNAL OF MOLECULAR CATALYSIS A-CHEMICAL
(2015)
Article
Chemistry, Physical
Yi Cao, Li Lan, Xi Feng, Zhengzheng Yang, Sha Zou, Haidi Xu, Zheqi Li, Maochu Gong, Yaoqiang Chen
CATALYSIS SCIENCE & TECHNOLOGY
(2015)
Article
Chemistry, Physical
Zhengzheng Yang, Jun Li, Hailong Zhang, Yi Yang, Maochu Gong, Yaoqiang Chen
CATALYSIS SCIENCE & TECHNOLOGY
(2015)
Article
Chemistry, Multidisciplinary
Zhengzheng Yang, Na Zhang, Yi Cao, Yunxiang Li, Yunwen Liao, Youping Li, Maochu Gong, Yaoqiang Chen
Article
Engineering, Environmental
Youping Li, Ya Tang, Zhongyu Fan, Hong Zhou, Zhengzheng Yang
ENVIRONMENTAL ENGINEERING RESEARCH
(2018)
Article
Chemistry, Physical
Na Zhang, Zhengzheng Yang, Zhi Chen, Yunxiang Li, Yunwen Liao, Youping Li, Maochu Gong, Yaoqiang Chen
Article
Chemistry, Applied
Yang Zhengzheng, Chen Yongdong, Zhao Ming, Zhou Jufa, Gong Maochu, Chen Yaoqiang
CHINESE JOURNAL OF CATALYSIS
(2012)
Article
Chemistry, Physical
Zhengzheng Yang, Na Zhang, Yi Cao, Maochu Gong, Ming Zhao, Yaoqiang Chen
CATALYSIS SCIENCE & TECHNOLOGY
(2014)
Article
Chemistry, Physical
Zhengzheng Yang, Wei Hu, Na Zhang, Yunxiang Li, Yunwen Liao
JOURNAL OF CATALYSIS
(2019)
Article
Chemistry, Physical
Zhi Chen, Liuling Chen, Man Jiang, Xingyue Gao, Maolin Huang, Yunxiang Li, Liping Ren, Yan Yang, Zhengzheng Yang
APPLIED SURFACE SCIENCE
(2020)
Article
Energy & Fuels
Zhengzheng Yang, Liping Luo, Linxi Tang, Zibo Zhou, Zizhong Zhou, Yunxiang Li
Article
Chemistry, Physical
Zhengxu Chen, Dezhou Luo, Huangwei Zhang, Na Zhang, Junqi Li, Bin Gao, Run Qiu, Yunxiang Li, Zhengzheng Yang
Summary: By controlling the size of platinum nanoparticles, the NO oxidation activity and reaction pathway can be influenced, with larger particles leading to the generation of nitrates that hinder NO oxidation activity.
MOLECULAR CATALYSIS
(2021)
Article
Thermodynamics
Yifan Yang, Haodong Zhang, Linye Li, Mingming Gu, Xi Xia, Fei Qi
Summary: This paper investigates the formation of a blue whirl by controlling tangential and radial airflows. By using a unique fire whirl apparatus, the blue whirl can be formed directly upon ignition without going through the transient phase. The study also discovers new flame regimes and explores the mechanism behind the formation and transition of the blue whirl.
COMBUSTION AND FLAME
(2024)
Article
Thermodynamics
Xiaobin Qi, Songyan Gao, Zhiping Zhu, Qinggang Lyu, Haixia Zhang
Summary: This study experimentally investigated the propagation characteristics of reverse combustion under oxygen-limited and enriched conditions. The contribution of volatiles gas-phase oxidation and char surface oxidation to reverse combustion was evaluated. The results showed that oxygen enrichment expanded the operating range of oxygen flow rate for reverse combustion and enhanced the low-temperature oxidation of the solid fuel. The findings provide a better understanding of the driving mechanism of reverse combustion and have important implications for efficient thermal conversion of solid fuels.
COMBUSTION AND FLAME
(2024)
Article
Thermodynamics
Bingjie Chen, Peng Liu, Bingzhi Liu, Zhandong Wang, Xiang Gao, William L. Roberts
Summary: In this study, the low temperature oxidation of 1,2,4-trimethylbenzene was investigated using experiments and numerical simulations. The results showed the presence of toxic oxygenated aromatic compounds and proposed potential formation pathways. The numerical simulations accurately predicted the mole fractions of most compounds, but some compounds were missing.
COMBUSTION AND FLAME
(2024)
Article
Thermodynamics
Meng Sui, Zhiheng Zhu, Fashe Li, Hua Wang
Summary: The effect of adding ferrocene as a combustion catalyst to Jatropha biodiesel on its pyrolysis and combustion performance is investigated. The results show that adding ferrocene reduces activation energy and harmful emissions while improving combustion efficiency.
COMBUSTION AND FLAME
(2024)
Article
Thermodynamics
Manaf Sheyyab, Mohammed Abdulrahman, Subharaj Hossain, Patrick T. Lynch, Eric K. Mayhew, Kenneth Brezinsky
Summary: Fuel surrogates, simplified representations of complex fuels, accurately model speciation results and reaction kinetics, reproduce the ignition quality and chemical functional group compositions of their parent fuels.
COMBUSTION AND FLAME
(2024)
Article
Thermodynamics
Yan Wang, Shumeng Xie, Hannes Bottler, Yiqing Wang, Xinyi Chen, Arne Scholtissek, Christian Hasse, Zheng Chen
Summary: This study investigates how flow affects the ignition and transition process of a cool flame. The results show that the ignition energy determines the highest temperature and the strain rate influences the flame propagation and the transition from cool flame to hot flame.
COMBUSTION AND FLAME
(2024)
Article
Thermodynamics
Tanusree Chatterjee, Mengyuan Wang, Goutham Kukkadapu, Chih-Jen Sung, William J. Pitz
Summary: Cycloalkanes, including cyclohexane, are important hydrocarbons in transportation fuels. However, limited oxidation data at low-to-intermediate temperatures and inadequate predictive ability of kinetic models have hindered the understanding and improvement of cyclohexane oxidation. This study provides experimental and modeling results to develop a more accurate kinetic model for cyclohexane oxidation.
COMBUSTION AND FLAME
(2024)
Article
Thermodynamics
Tao Wu, Erik Hagen, Haiyang Wang, Dylan J. Kline, Michael R. Zachariah, Carole Rossi
Summary: It was found that incorporating CuO into Al/I2O5 can significantly reduce the ignition time and enhance the combustion performance. The optimum composition of 80/20 wt% of I2O5/CuO shows a 30 times shorter ignition time and produces a peak pressure and pressurization rate 4 and 26 times greater than traditional Al/I2O5. A series of characterizations helped unravel the cause of improvement and propose a reaction mechanism for this ternary Al/I2O5/CuO system. This study proposes a facile, inexpensive, and efficient way to enhance the combustion performance of Al/I2O5 biocidal nanoenergetic materials.
COMBUSTION AND FLAME
(2024)
Article
Thermodynamics
Mahmoud Gadalla, Shervin Karimkashi, Islam Kabil, Ossi Kaario, Tianfeng Lu, Ville Vuorinen
Summary: In this study, the flame initiation process in dual-fuel spray assisted combustion is explored through scale-resolved simulations, providing numerical evidence on the initiation of premixed flames. It is found that there is a transient mixed-mode combustion phase after ignition, followed by a primarily deflagrative combustion mode. The interactions between turbulence and premixed flame front are characterized in the corrugated regime.
COMBUSTION AND FLAME
(2024)
Article
Thermodynamics
Neeraj Kumar Pradhan, Arindrajit Chowdhury, Debasis Chakraborty, Neeraj Kumbhakarna
Summary: In this study, a modified model for predicting the burn rate of composite solid propellants is proposed. The model has been validated against experimental and theoretical results, and it outperforms existing models in all cases considered. The model is highly robust and provides results quickly, making it highly efficient in terms of time, effort, and computational resources.
COMBUSTION AND FLAME
(2024)
Article
Thermodynamics
Lili Ye, Zhihe Zhang, Fan Wang, Xiaodong Wang, Yiming Lu, Lei Zhang
Summary: This study investigated the pyrolysis mechanism of octahydro-1,3,5,7-tetranitro-1,3,5,7-tetrazocine (HMX) explosive using ab initio and kinetic modeling simulations. The results showed that N-NO2 bond fission and C-H beta-scission are important channels in the decomposition of HMX.
COMBUSTION AND FLAME
(2024)
Article
Thermodynamics
Andrei N. Lipatnikov, Hsuchew Lee, Peng Dai, Minping Wan, Vladimir A. Sabelnikov
Summary: This study investigates the importance of thermodiffusive and hydrodynamic instabilities of laminar flames in turbulent flows through numerical simulations. The analysis suggests that laminar flame instabilities play a minor role at sufficiently high Karlovitz numbers.
COMBUSTION AND FLAME
(2024)
Article
Thermodynamics
Shijie Xu, Yue Qiu, Leilei Xu, Jianqing Huang, Shen Li, Elna J. K. Nilsson, Zhongshan Li, Weiwei Cai, Marcus Alden, Xue-Song Bai
Summary: Metal powder is a promising carbon-free and recyclable energy carrier. In this study, a computational model for the combustion and phase change of micron-sized iron particles was proposed and validated. The model successfully captures the melting, surface reactions, cooling, and solidification processes. The study also reveals a two-stage solidification phenomenon and identifies a diffusion-controlled mechanism during the melting process. The reaction between iron and CH4/O2/N2 flame products is found to play a significant role in the iron combustion process.
COMBUSTION AND FLAME
(2024)
Article
Thermodynamics
Khalid Aljohani, Abd El-Sabor Mohamed, Haitao Lu, Henry J. Curran, S. Mani Sarathy, Aamir Farooq
Summary: This study investigates the impact of exhaust gas recirculation (EGR) and NOx on the ignition delay time of oxygenated gasoline. A gasoline surrogate model is developed and the experimental data are useful for predicting fuel ignition behavior in internal combustion engines. The results show that EGR inhibits gasoline reactivity, while NOx has a promoting effect at high temperatures. This research is important for understanding the combustion behavior of gasoline in engines.
COMBUSTION AND FLAME
(2024)
Article
Thermodynamics
Chengcheng Ao, Jia Yan, Tong Yan, Lidong Zhang, Pan Wang
Summary: This study investigates the inhibitory effect of ammonia blended with hydrocarbon fuels on soot formation. The results show that there is a chemical interaction between ammonia and polycyclic aromatic hydrocarbons (PAHs), blocking the formation of larger PAHs.
COMBUSTION AND FLAME
(2024)