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
Environmental Sciences
Chao Zhong, Jinke Gong, Shaoli Wang, Jiqiu Tan, Junan Liu, Yun Zhu, Guohai Jia
Summary: Different types of diesel particulate filters have varying effects on NO2 catalytic formation, consumption, and efflux, with CCDPF performing the best in hot-start and high-speed cycles.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2021)
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, Multidisciplinary
Houda Jouini, Imene Mejri, Joaquin Martinez-Ortigosa, Jose L. Cerillo, Carolina Petitto, Mourad Mhamdi, Teresa Blasco, Gerard Delahay
Summary: This study investigates the performance change of Fe-Cu-ZSM-5 SCR catalyst after contacting with poisoning species such as sodium and potassium. It is found that the introduction of alkali metals does not deteriorate the crystallinity and morphology of zeolite crystals, but leads to a significant loss of surface acidity, resulting in a dramatic deactivation of the SCR reaction.
RESEARCH ON CHEMICAL INTERMEDIATES
(2022)
Article
Chemistry, Physical
Huawang Zhao, Lei Han, Yujie Wang, Jiandong Zheng
Summary: In this study, the poisoning effect of platinum on Cu-SSZ-13 catalyst and its regeneration were investigated. The enhanced NH3 selective oxidation reaction by platinum led to overconsumption of NH3 and decreased deNOx activities. Recovery of deNOx activities of the Pt-poisoned samples was achieved through the transformation of Pt-0 into PtOx after hydrothermal aging.
Article
Engineering, Environmental
Aiyong Wang, Maria Elena Azzoni, Joonsoo Han, Kunpeng Xie, Louise Olsson
Summary: Cu/zeolites were prepared to study the effect of phosphorus poisoning on different zeolite framework structures for NH3-SCR. The results showed significant differences in phosphorus poisoning depending on the zeolite framework structure. Cu/SSZ-13, Cu/ZSM-5, and Cu/BEA had decreasing PO3-/PO43- species with increasing P2O5, possibly due to increased pore size reducing steric hindrance for larger P2O5 species. P2O5 enhanced Cu ion redox ability, increasing low-temperature activity, while Cu ions were significantly poisoned by PO3-/PO43-, resulting in low-temperature deactivation. Phosphorus poisoning had a greater effect on the structure of Cu/ZSM-5, possibly due to attack on surface defects causing local expansion and cracking.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Engineering, Chemical
Chao Zhong, Jingwei Liang, Yun Zhu, Hongyan Zuo, Shaoli Wang, Bo Chen, Xin Wu, Chenxi Wu
Summary: Diesel particulate filters (DPFs) are standard components for controlling particulate emissions from diesel engines. This study establishes a DPF passive-active coupled regeneration model and verifies its kinetic parameters. The research provides a theoretical basis for DPF regeneration and control.
CHEMICAL ENGINEERING SCIENCE
(2022)
Article
Chemistry, Inorganic & Nuclear
Houda Jouini, Alessandra de Marcos-Galan, Imene Mejri, Rahma Bensouilah, Mourad Mhamdi, Teresa Blasco, Gerard Delahay
Summary: The addition of tungsten can slightly improve the high temperature catalytic activity of Fe-Cu-ZSM-5, and the W-based catalyst shows lower deactivation and better catalytic activity for NO reduction after hydrothermal aging compared to the bimetallic catalyst. Severe aging without tungsten leads to the formation of copper oxide agglomerates responsible for the deterioration of SCR activity of aged Fe-Cu-ZSM-5.
Review
Chemistry, Physical
Wangxiang Pan, Jingping He, Guanlin Huang, Wentao Zhang, De Fang
Summary: This paper reviews the preparation methods, properties, and influencing factors of ZSM-5 catalysts in NH3-SCR, discusses the SCR performance of ZSM-5 catalysts doped with different metal ions, and summarizes the environmental adaptability of ZSM-5 catalysts and their development in denitrification.
Article
Chemistry, Physical
Magdalena Jablonska, Kinga Gora-Marek, Paolo Cleto Bruzzese, Ana Palcic, Kamila Pyra, Karolina Tarach, Marko Bertmer, David Poppitz, Andreas Poeppl, Roger Glaeser
Summary: In this study, nanosized Cu-containing ZSM-5 catalysts with different n(Si)/n(Al) ratios ranging from 18.9 to 50.5 were prepared by ion-exchange. Physico-chemical characterization revealed that the nature and distribution of copper species are influenced by the molar ratio of framework T atoms. Spectroscopic analyses, including DR UV-Vis, TPR-H-2, EPR, and FT-IR, indicated that the amount of aggregated copper species increases with an increase in the framework n(Si)/n(Al) ratio. The activity of Cu-containing ZSM-5 in the NH3-SCR-DeNO(x) reaction significantly decreases when the n(Si)/n(Al) ratio is between 47.0 and 50.5 compared to other materials with n(Si)/n(Al) ratios of 18.9-19.6. The mechanism of the reaction was discussed based on 2D COS analysis of IR spectra and the catalytic properties of zeolites.
Article
Engineering, Environmental
Jin Yuan, Zhen Wang, Jun Liu, Junhua Li, Jianjun Chen
Summary: Carbon-based selective catalytic reduction (SCR) technology combined with reaction-regeneration process is used to reduce NOx emissions, but NH3 slip is often ignored. This study shows that although carboxyl groups on metal-free carbon catalysts have strong NH3 adsorption, they do not participate in the SCR reaction. These catalytic inactive carboxyl groups not only prolong the SCR steady state, but also increase the risk of NH3 slip. Decomposition of carboxyl groups can alleviate NH3 slip, and the presence of inactive sites with strong NH3 adsorption on carbon catalysts should be carefully considered. This work not only enhances the understanding of the NH3-SCR mechanism, but also provides opportunities for controlling ammonia emissions from industrial processes.
ENVIRONMENTAL SCIENCE & TECHNOLOGY
(2023)
Article
Chemistry, Physical
Hongyan Xue, Xiaoming Guo, Tao Meng, Dongsen Mao, Zhen Ma
Summary: M/ZSM-5 (M = Mn, Co, Cu) samples were prepared by impregnation and their catalytic performance in NH3-SCR of NO was tested. Cu/ZSM-5 exhibited the highest activity, followed by Mn/ZSM-5, and Co/ZSM-5 was the least active. In-situ DRIFTS analysis revealed the nature and evolution of surface species. Coordinated NH3, NH4+, and amide (-NH2) species derived from NH3 adsorption were found to be relevant for NH3-SCR, while bridged nitrate species derived from NOx adsorption were identified as the main active species. Bridged nitrate was more abundant and thermally more stable on Cu/ZSM-5, consistent with its higher activity compared to Mn/ZSM-5 and Co/ZSM-5. Different mechanisms, including Eley-Rideal and Langmuir-Hinshelwood, were observed for Mn/ZSM-5 at different temperatures, while both pathways coexisted for Co/ZSM-5 and Cu/ZSM-5.
SURFACES AND INTERFACES
(2022)
Review
Environmental Sciences
Zhiqing Zhang, Rui Dong, Guanglin Lan, Tao Yuan, Dongli Tan
Summary: Diesel particulate filter (DPF) is an effective method to control particulate matter (PM) emissions from diesel engines and is increasingly mandated by national/regional laws and regulations. This paper comprehensively summarizes advanced regeneration technologies, including filter structure, new catalyst formulas, accurate soot prediction, safe and reliable regeneration strategies, uncontrolled regeneration, and its control methods. The additional emissions during regeneration and the impact of DPF modification on the original system of old models are also discussed.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2023)
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
Chemistry, Multidisciplinary
Anqi Dong, Zhi Yang, Weichao Wang
Summary: This study successfully achieved low-temperature NH3 oxidation by synthesizing mixed-phase catalysts SmMn2O5/Cu-SAPO34. The physicochemical properties of the catalysts were analyzed using characterization methods, and it was found that the internal SCR mechanism is the main reason for the improved conversion and selectivity.
Article
Thermodynamics
Yong Cheng, Fukai Song, Lei Fu, Saishuai Dai, Zhiming Yuan, Atilla Incecik
Summary: This paper investigates the accessibility of wave energy absorption by a dual-pontoon floating breakwater integrated with hybrid-type wave energy converters (WECs) and proposes a hydraulic-pneumatic complementary energy extraction method. The performance of the system is validated through experiments and comparative analysis.
Article
Thermodynamics
Jing Gao, Chao Wang, Zhanwu Wang, Jin Lin, Runkai Zhang, Xin Wu, Guangyin Xu, Zhenfeng Wang
Summary: This study aims to establish a new integrated method for biomass cogeneration project site selection, with a focus on the application of the model in Henan Province. By integrating Geographic Information System and Multiple Criterion Decision Making methods, the study conducts site selection in two stages, providing a theoretical reference for the construction of biomass cogeneration projects.
Article
Thermodynamics
Mert Temiz, Ibrahim Dincer
Summary: The current study presents a hybrid small modular nuclear reactor and solar-based system for sustainable communities, integrating floating and bifacial photovoltaic arrays with a small modular reactor. The system efficiently generates power, hydrogen, ammonia, freshwater, and heat for residential, agricultural, and aquaculture facilities. Thermodynamic analysis shows high energy and exergy efficiencies, as well as large-scale ammonia production meeting the needs of metropolitan areas. The hybridization of nuclear and solar technologies offers advantages of reliability, environmental friendliness, and cost efficiency compared to renewable-alone and fossil-based systems.
Editorial Material
Thermodynamics
Wojciech Stanek, Wojciech Adamczyk
Article
Thermodynamics
Desheng Xu, Yanfeng Li, Tianmei Du, Hua Zhong, Youbo Huang, Lei Li, Xiangling Duanmu
Summary: This study investigates the optimization of hybrid mechanical-natural ventilation for smoke control in complex metro stations. The results show that atrium fires are more significantly impacted by outdoor temperature variations compared to concourse/platform fires. The gathered high-temperature smoke inside the atrium can reach up to 900 K under a 5 MW train fire energy release. The findings provide crucial engineering insights into integrating weather data and adaptable ventilation protocols for smoke prevention/mitigation.
Article
Thermodynamics
Da Guo, Heping Xie, Mingzhong Gao, Jianan Li, Zhiqiang He, Ling Chen, Cong Li, Le Zhao, Dingming Wang, Yiwei Zhang, Xin Fang, Guikang Liu, Zhongya Zhou, Lin Dai
Summary: This study proposes a new in-situ pressure-preserved coring tool and elaborates its pressure-preserving mechanism. The experimental and field test results demonstrate that this tool has a high pressure-preservation capability and can maintain a stable pressure in deep wells. This study provides a theoretical framework and design standards for the development of similar technologies.
Article
Thermodynamics
Aolin Lai, Qunwei Wang
Summary: This study assesses the impact of China's de-capacity policy on renewable energy development efficiency (REDE) using the Global-MSBM model and the difference-in-differences method. The findings indicate that the policy significantly enhances REDE, promoting technological advancements and marketization. Moreover, regions with stricter environmental regulations experience a higher impact.
Article
Thermodynamics
Mostafa Ghasemi, Hegazy Rezk
Summary: This study utilizes fuzzy modeling and optimization to enhance the performance of microbial fuel cells (MFCs). By simulating and analyzing experimental data sets, the ideal parameter values for increasing power density, COD elimination, and coulombic efficiency were determined. The results demonstrate that the fuzzy model and optimization methods can significantly improve the performance of MFCs.
Article
Thermodynamics
Zhang Ruan, Lianzhong Huang, Kai Wang, Ranqi Ma, Zhongyi Wang, Rui Zhang, Haoyang Zhao, Cong Wang
Summary: This paper proposes a grey box model for fuel consumption prediction of wing-diesel hybrid vessels based on feature construction. By using both parallel and series grey box modeling methods and six machine learning algorithms, twelve combinations of prediction models are established. A feature construction method based on the aerodynamic performance of the wing and the energy relationship of the hybrid system is introduced. The best combination is obtained by considering the root mean square error, and it shows improved accuracy compared to the white box model. The proposed grey box model can accurately predict the daily fuel consumption of wing-diesel hybrid vessels, contributing to operational optimization and the greenization and decarbonization of the shipping industry.
Article
Thermodynamics
Huayi Chang, Nico Heerink, Junbiao Zhang, Ke He
Summary: This study examines the interaction between off-farm employment decisions between couples and household clean energy consumption in rural China, and finds that two-paycheck households are more likely to consume clean energy. The off-farm employment of women is a key factor driving household clean energy consumption to a higher level, with wage-employed wives having a stronger influence on these decisions than self-employed ones.
Article
Thermodynamics
Hanguan Wen, Xiufeng Liu, Ming Yang, Bo Lei, Xu Cheng, Zhe Chen
Summary: Demand-side management is crucial to smart energy systems. This paper proposes a data-driven approach to understand the relationship between energy consumption patterns and household characteristics for better DSM services. The proposed method uses a clustering algorithm to generate optimal customer groups for DSM and a deep learning model for training. The model can predict the possibility of DSM membership for a given household. The results demonstrate the usefulness of weekly energy consumption data and household socio-demographic information for distinguishing consumer groups and the potential for targeted DSM strategies.
Article
Thermodynamics
Xinglan Hou, Xiuping Zhong, Shuaishuai Nie, Yafei Wang, Guigang Tu, Yingrui Ma, Kunyan Liu, Chen Chen
Summary: This study explores the feasibility of utilizing a multi-level horizontal branch well heat recovery system in the Qiabuqia geothermal field. The research systematically investigates the effects of various engineering parameters on production temperature, establishes mathematical models to describe their relationships, and evaluates the economic viability of the system. The findings demonstrate the significant economic feasibility of the multi-level branch well system.
Article
Thermodynamics
Longxin Zhang, Songtao Wang, Site Hu
Summary: This investigation reveals the influence of tip leakage flow on the modern transonic rotor and finds that the increase of tip clearance size leads to a decline in rotor performance. However, an optimal tip clearance size can extend the rotor's stall margin.
Article
Thermodynamics
Kristian Gjoka, Behzad Rismanchi, Robert H. Crawford
Summary: This paper proposes a framework for assessing the performance of 5GDHC systems and demonstrates it through a case study in a university campus in Melbourne, Australia. The results show that 5GDHC systems are a cost-effective and environmentally viable solution in mild climates, and their successful implementation in Australia can create new market opportunities and potential adoption in other countries with similar climatic conditions.
Article
Thermodynamics
Jianwei Li, Guotai Wang, Panpan Yang, Yongshuang Wen, Leian Zhang, Rujun Song, Chengwei Hou
Summary: This study proposes an orientation-adaptive electromagnetic energy harvester by introducing a rotatable bluff body, which allows for self-regulation to cater for changing wind flow direction. Experimental results show that the output power of the energy harvester can be greatly enhanced with increased rotatory inertia of the rotating bluff body, providing a promising solution for harnessing wind-induced vibration energy.