Article
Energy & Fuels
Shengquan Zhou, Xiaochao Zhu, Bo Li, Qiang Gao, Beibei Yan, Guanyi Chen
Summary: The adiabatic laminar burning velocity and overall activation energy of biomass gasified gas were investigated in this study. The results showed that the burning velocity was influenced by various factors, while the activation energy was not significantly affected by the equivalence ratio.
Article
Thermodynamics
Xinlu Han, Marco Lubrano Lavadera, Christian Brackmann, Zhihua Wang, Yong He, Alexander A. Konnov
Summary: The formation of nitric oxide (NO) in methane (CH4) flames has been extensively studied, but discrepancies between simulations using different kinetic mechanisms and experimental results persist. Experimental data was collected for NO formation in post-flame zones of CH4+O2+N2 flames with varying oxygen ratios. Analysis showed that thermal-NO production plays a key role in the increase of NO mole fraction in stoichiometric and fuel-lean flames as oxygen ratio increases.
COMBUSTION AND FLAME
(2021)
Article
Chemistry, Multidisciplinary
Ahmed Yasiry, Jinhua Wang, Longkai Zhang, Hongchao Dai, Ahmed A. A. Abdulraheem, Haroun A. K. Shahad, Zuohua Huang
Summary: The study aims to explore the potential of using ammonia as a replacement for natural gas, while making only minor adjustments to equipment and processes. The research investigates the burning velocity of binary blends, such as ammonia-methane and ammonia-hydrogen, and the effect of different hydrogen blending ratios on tertiary fuels. The results show that increasing the hydrogen fraction increases the burning velocity for all mixtures, while the blending of ammonia with methane also increases the burning velocity.
APPLIED SCIENCES-BASEL
(2023)
Article
Thermodynamics
Shixing Wang, Zhihua Wang, Chenlin Chen, Ayman M. Elbaz, Zhiwei Sun, William L. Roberts
Summary: This study focuses on the combustion of NH3 blended fuels under elevated pressure conditions and proposes a new kinetic mechanism (CEU-NH3-Mech-1.1) based on experimental results. The new mechanism shows good predictability for laminar flame speed, ignition delay time, and species concentration in ammonia oxidation at high temperatures. Additionally, the study reveals the variation of pressure exponent with ammonia content and its role in validating kinetic mechanisms.
COMBUSTION AND FLAME
(2022)
Article
Energy & Fuels
Fahui Wang, Yuan Wang, Dan Zhang, Xiaoping Wen, Guoyan Chen
Summary: The effects of N2 dilution and CH4 addition on the combustion characteristics of complex biomass syngas were studied. The results show significant influences on the laminar burning velocities and NO generation.
Article
Engineering, Aerospace
Xun Wang, Jianqin Fu, Mingke Xie, Qi Liu, Jingping Liu
Summary: This study investigates the influencing mechanisms of laminar burning velocity (LBV) of methane mixed with hydrogen under different boundary conditions through chemical kinetic analysis. The results show that LBV increases with the addition of hydrogen and the initial temperature, but decreases with the increase of initial pressure and CO2 dilution ratio. Moreover, LBV first increases and then decreases as the equivalence ratio increases. The concentration of important reactive radicals in the system plays a crucial role in determining LBV.
AEROSPACE SCIENCE AND TECHNOLOGY
(2022)
Article
Energy & Fuels
Jinguo Sun, Qian Huang, Yong Tang, Shuiqing Li
Summary: This study investigates the effects of gliding arc discharge on the stabilization and emission characteristics of premixed NH3/CH4/air swirl flames. The results show that the discharge improves flame stability by increasing OH radical concentration and expanding the inner recirculation zone. The discharge slightly increases NOx emissions at low NH3 contents, but effectively reduces NOx emissions at higher NH3 contents.
Article
Energy & Fuels
Yada Leo, Bo Zhang
Summary: The study investigates the explosion behavior and Rayleigh-Taylor instability of methane-air mixtures. Results show that increasing initial pressure leads to higher maximum explosion pressure, while flame speed and laminar burning velocity decrease. Ignition feasibility and delay time are strongly related to reactant mass per unit volume and fuel composition, and RT instability causes flame structural instability.
Article
Thermodynamics
Marie-Eve Clavel, Pierre Schleuniger, Yiqing Wang, Alexis Vandel, Vincent Modica, Zheng Chen, Bruno Renou
Summary: The study investigates the measurement of laminar burning velocity under various conditions using density weighted displacement speeds. The effects of pressure decrease and flame stretch on burned gas velocity are analyzed, and it is found that a correction factor is needed to accurately determine LBV at low pressures. Additionally, the kinetic schemes for methane and n-decane are validated at low pressures.
PROCEEDINGS OF THE COMBUSTION INSTITUTE
(2023)
Article
Energy & Fuels
Shu Zheng, Hao Liu, Dengke Li, Zirui Liu, Bo Zhou, Qiang Lu
Summary: With the development of high-load and high-pressure combustion equipment, it is crucial to enhance the accuracy of laminar burning velocity prediction under elevated pressures. In this study, a Statistical Narrow-Band (SNB) model of methane at elevated pressures was constructed using the HITRAN 2016 database, and the impact of radiation reabsorption on burning velocity was investigated.
Article
Thermodynamics
Willyanto Anggono, Akihiro Hayakawa, Ekenechukwu C. Okafor, Gabriel Jeremy Gotama, Stevan Wongso
Summary: The study found that an increase in CO2 dilution ratio reduces the laminar burning velocity of CH4/CO2/Air mixtures and affects the flame response to stretch. Results showed a non-monotonic relationship between CO2 dilution ratio and different equivalence ratios, with an increase in CO2 enhancing the flames' response to stretch.
COMBUSTION SCIENCE AND TECHNOLOGY
(2021)
Article
Energy & Fuels
Maria Mitu, Codina Movileanu, Venera Giurcan
Summary: This study evaluates the performance of the constant-volume method through experiments conducted in three different closed vessels. Accurate laminar burning velocities obtained from these experiments can be used in the development of computational fluid dynamics models to improve the design and efficiency of internal combustion engines. The experimental results were compared with data from different chemical kinetic mechanisms and literature, showing good agreement. The obtained pressure coefficients and overall reaction orders fall within the reference range of methane-air mixtures at ambient initial temperature.
Article
Energy & Fuels
Shixing Wang, Guoqing Wang, Ayman M. Elbaz, Thibault F. Guiberti, William L. Roberts
Summary: This study focuses on the effects of turbulent intensity, ammonia content, and equivalence ratio on the flame structure and NO emissions of ammonia/methane/air flames, as well as their links to OH-PLIF intensity. It is found that the flame shape is determined by the ammonia content and equivalence ratio, and a unified correlation between turbulent intensity and OH-PLIF intensity is proposed. A new description of the link between NO, OH, and ammonia content is provided, improving the correlation performance.
Article
Energy & Fuels
Zhanwang Shi, Ligang Zheng, Jianlei Zhang, Yuxin Miao, Xi Wang, Yan Wang, Shuaiyong Tang
Summary: This study investigates the effect of initial pressure on the suppression of gas explosions using sodium bicarbonate (NaHCO3) as an inhibitor. The results show that the critical solid concentration required for successful explosion suppression increases with increasing initial pressure. A lower initial pressure leads to a higher suppression effectiveness. Increasing the initial pressure reduces the maximum explosion pressure, maximum rate of pressure rise, and explosion induction time.
Article
Chemistry, Physical
Pragya Berwal, Saran Solagar, Sudarshan Kumar
Summary: This study investigated the laminar burning velocity variation of CH4+H-2+air mixtures at elevated temperatures using an externally heated diverging-channel method. Results showed an increase in burning velocity with higher H2 fraction due to the formation of H-atom as an intermediate, establishing a temperature dependency through a power-law correlation.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2022)
Article
Materials Science, Multidisciplinary
Maria Mitu, Sabine Zakel, Elisabeth Brandes, Werner Hirsch
Summary: While ignition temperatures of many flammable substances in air and pure oxygen are well known, there is a lack of data on ignition temperatures in nitrous oxide, despite its widespread use as an oxidizer. Recent experiments have shown that ignition temperatures in oxidizer mixtures containing nitrous oxide increase with higher nitrous oxide concentrations.
FIRE AND MATERIALS
(2022)
Article
Thermodynamics
V Giurcan, M. Mitu, C. Movileanu, D. Razus, D. Oancea
Summary: The laminar burning velocities of a stoichiometric CH4-N2O mixture diluted with N-2 at various initial pressures and temperatures were numerically modeled. The study investigated the influence of initial conditions on burning velocities and flame characteristics.
COMBUSTION EXPLOSION AND SHOCK WAVES
(2022)
Article
Engineering, Chemical
Domnina Razus, Venera Giurcan, Codina Movileanu, Maria Mitu
Summary: A computational study was conducted to investigate the effect of adding nitrogen to hydrogen-nitrous oxide flames at different initial pressures and temperatures. The results showed that increasing the initial pressure and temperature led to higher mass fractions of NO and flame temperature.
Article
Energy & Fuels
Maria Mitu, Codina Movileanu, Venera Giurcan
Summary: This study evaluates the performance of the constant-volume method through experiments conducted in three different closed vessels. Accurate laminar burning velocities obtained from these experiments can be used in the development of computational fluid dynamics models to improve the design and efficiency of internal combustion engines. The experimental results were compared with data from different chemical kinetic mechanisms and literature, showing good agreement. The obtained pressure coefficients and overall reaction orders fall within the reference range of methane-air mixtures at ambient initial temperature.
Review
Engineering, Chemical
Domnina Razus
Summary: This Review focuses on the gas-phase oxidations of hydrogen and other fuels with nitrous oxide, examining different types of combustion and explosions. The conditions and characteristic parameters for explosive decomposition of nitrous oxide are summarized, as well as the properties of explosive combustion and propagation in fuel-nitrous oxide systems. The role of nitrous oxide as a promoter in fuel-oxygen or fuel-air explosive combustion is also discussed.
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
(2022)
Article
Engineering, Chemical
Venera Giurcan, Maria Mitu, Codina Movileanu, Domnina Razus
Summary: This study investigates the effects of initial pressure on laminar burning velocities of diluted methane-nitrous oxide mixtures through experiments and numerical simulations, and determines the corresponding parameters.
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
(2022)
Article
Engineering, Chemical
Venera Giurcan, Domnina Razus, Maria Mitu, Codina Movileanu
Summary: The study investigates the explosion parameters of ethylene-nitrous oxide mixtures under different initial pressures and compositions. It is found that ethylene-N2O-N-2 mixtures develop higher explosion pressures and rates of pressure rise compared to ethylene-air mixtures under the same C/O ratio.
Article
Energy & Fuels
Domnina Razus, Codina Movileanu, Maria Mitu, Venera Giurcan
Summary: The propagation speeds of premixed n-butane-air mixtures were investigated under various initial conditions. Experimental measurements and kinetic modeling were conducted to obtain the propagation speeds. The study analyzed the obtained speeds based on both experimental and computed velocities, and discussed the dependence of the propagation speed on the initial pressure and temperature.
Article
Engineering, Chemical
Maria Mitu, Thomas Stolz, Sabine Zakel
Summary: The Maximum Experimental Safe Gap (MESG) is a significant criterion for evaluating the spread of flames through small gaps. It is used to classify flammable gases and vapors in explosion groups, which is essential for explosion protection. This study investigates the impact of inert gas addition on MESG to assess the effectiveness of inertization in explosion protection.
JOURNAL OF LOSS PREVENTION IN THE PROCESS INDUSTRIES
(2023)
Article
Engineering, Chemical
Maria Mitu, Domnina Razus, Dorin Boldor, Cosmin Marculescu
Summary: Willow wood is a promising biomass for pyrolysis due to its fast growth, renewability, and high energy density. The pyrolysis of willow wood produced a multi-fuel gaseous mixture with a specific composition. Numerical simulations were conducted to investigate the combustion characteristics of these multi-fuel mixtures with air, providing important parameters for further analysis. The determination of overall activation parameters of multifuel oxidation with air was achieved by correlating the obtained parameters with initial pressure and temperature.
Review
Energy & Fuels
Codina Movileanu, Maria Mitu, Venera Giurcan
Summary: This paper summarizes the recent research on laminar burning velocities of hydrogen-enriched n-butane-air mixtures. The findings suggest that hydrogen addition can increase the laminar burning velocity and flame temperature, and improve flame stability. These results are useful for the optimization of combustion processes, particularly in internal combustion engines and gas turbines.
Article
Engineering, Environmental
Shun-Shun Chen, Xu-Xiu Chen, Tian-Yu Yang, Li Chen, Zheng Guo, Xing-Jiu Huang
Summary: A temperature-modulated sensing strategy was proposed to identify and determine BTEX compounds. Highly effective identification of BTEX was achieved using linear discrimination and convolutional neural network analyses. Additionally, quantitative analysis of concentration was accomplished by establishing the relationship between concentration and response.
JOURNAL OF HAZARDOUS MATERIALS
(2024)
Article
Engineering, Environmental
Myungkyung Noh, Jeong Yeon Sim, Jisung Kim, Jee Hwan Ahn, Hye-Young Min, Jong-Uk Lee, Jong-Sook Park, Ji Yun Jeong, Jae Young Lee, Shin Yup Lee, Hyo-Jong Lee, Choon-Sik Park, Ho-Young Lee
Summary: This study reveals that chronic exposure to PM induces chronic inflammation and development of COPD by dysregulating NAD+ metabolism and subsequent SIRT1 deficiency in pulmonary macrophages. Activation of SIRT1 by resveratrol effectively mitigates PM-induced inflammation and COPD development. Targeting metabolic and epigenetic reprogramming in macrophages induced by PM is a promising strategy for COPD treatment.
JOURNAL OF HAZARDOUS MATERIALS
(2024)
Article
Engineering, Environmental
Yu Liu, Linlin Qin, Yiming Qin, Tong Yang, Haoran Lu, Yulong Liu, Qiqi Zhang, Wenyan Liang
Summary: Co/NC/PAC electrode was prepared by compounding ZIF-67 with powder-activated carbon for the electrocatalytic treatment of nitrogen-containing heterocyclic compounds. The degradation efficiency of the four compounds reached 90.2-93.7% under optimal conditions, and the degradation order was pyridazine < pyrimidine < pyrazine < pyridine.
JOURNAL OF HAZARDOUS MATERIALS
(2024)
Article
Engineering, Environmental
Julien Couturier, Pierre Tamba Oulare, Blanche Collin, Claire Lallemand, Isabelle Kieffer, Julien Longerey, Perrine Chaurand, Jerome Rose, Daniel Borschneck, Bernard Angeletti, Steven Criquet, Renaud Podor, Hamed Pourkhorsandi, Guilhem Arrachart, Clement Levard
Summary: This study analyzes the properties of bauxite residue samples and explores the influence of bauxite ore origin, storage conditions, and storage time. The results show that the speciation of yttrium is related to the origin of bauxite ore, while no significant variation was observed with storage conditions or aging of the residues.
JOURNAL OF HAZARDOUS MATERIALS
(2024)
Article
Engineering, Environmental
Sakthinarenderan Saikumar, Ravi Mani, Mirunalini Ganesan, Inbakandan Dhinakarasamy, Thavamani Palanisami, Dharani Gopal
Summary: Microplastic contamination in marine ecosystems poses a growing concern due to its trophic transfer and negative effects on marine organisms. This study investigates the transfer and impacts of polystyrene microplastics in an estuarine food chain. The results show that microplastics can be transferred through the food chain, although the transfer rates are low. The exposed organisms exhibit stress responses, suggesting the potential risk of microplastics reaching humans through the food chain.
JOURNAL OF HAZARDOUS MATERIALS
(2024)
Review
Engineering, Environmental
Yan-Jiao Li, Ying Yuan, Wen-Bing Tan, Bei-Dou Xi, Hui Wang, Kun-Long Hui, Jia-Bao Chen, Yi-Fan Zhang, Lian-Feng Wang, Ren-Fei Li
Summary: This review investigated and analyzed the distribution, composition, and abundance of heavy metals and antibiotic resistance genes (ARGs) in landfill. The results showed that heavy metals have lasting effects on ARGs, and complexes of heavy metals and organic matter are common in landfill. This study provides a new basis to better understand the horizontal gene transfer (HGT) of ARGs in landfill.
JOURNAL OF HAZARDOUS MATERIALS
(2024)
Article
Engineering, Environmental
Jessy Joseph, Ari Vaisanen, Ajay B. Patil, Manu Lahtinen
Summary: Efficient and environmentally friendly porous hybrid adsorbent beads have been developed for the removal of arsenic from drinking water. The structural tuning of the adsorbents has been shown to have a significant impact on their adsorption performance, with high crystallinity leading to increased adsorption capacity and selectivity towards As5+.
JOURNAL OF HAZARDOUS MATERIALS
(2024)
Article
Engineering, Environmental
Yangyang Liu, Minhua Xiao, Kaiqin Huang, Juntao Cui, Hongli Liu, Yingxin Yu, Shengtao Ma, Xihong Liu, Meiqing Lin
Summary: This study measured the levels of phthalate metabolites in breast milk collected from mothers in southern China. The results showed that phthalates are still prevalent in the region, and breastfeeding contributes to phthalate intake in infants. However, the levels detected do not pose significant health risks to infants based on dietary exposure. The increasing exposure to certain phthalates calls for further research into their sources and potential risks.
JOURNAL OF HAZARDOUS MATERIALS
(2024)
Article
Engineering, Environmental
Zhiqiang Wu, Jianxing Sun, Liting Xu, Hongbo Zhou, Haina Cheng, Zhu Chen, Yuguang Wang, Jichao Yang
Summary: Ocean depth affects microbial diversity, composition, and co-occurrence patterns of microplastic microbial communities. Deterministic processes dominate the assembly of mesopelagic plastisphere microbial communities, while stochastic processes shape the assembly of bathypelagic microbial communities. The relationships between microorganisms in the mesopelagic layer are more complex and stable, with Proteobacteria and Actinobacteriota playing important roles.
JOURNAL OF HAZARDOUS MATERIALS
(2024)
Article
Engineering, Environmental
Tingting Xiao, Renjie Chen, Chen Cai, Shijie Yuan, Xiaohu Dai, Bin Dong, Zuxin Xu
Summary: Based on the efficiency of catalytic ozonation techniques in enhancing sludge dewaterability, this study investigated its effectiveness in simultaneous reduction of antibiotics and antibiotic resistance genes. The results showed that catalytic ozonation conditioning changed the distribution of antibiotics and achieved high degradation rates. It also significantly reduced the abundance of ARGs, inhibited horizontal gene transfer, and decreased the signal transduction of typical ARGs host bacteria.
JOURNAL OF HAZARDOUS MATERIALS
(2024)
Article
Engineering, Environmental
Yang Deng, Xiaohong Guan
Summary: This article discusses two different development approaches for ferrate(VI) technology in water treatment, arguing that process integration is a promising method that can drive technological innovation and revolution in water treatment, achieving higher treatment efficiency, reduced costs and energy consumption, and a smaller physical footprint.
JOURNAL OF HAZARDOUS MATERIALS
(2024)
Article
Engineering, Environmental
Zhe Zhang, Lu Zhang, Zhihao Huang, Yuxin Xu, Qingqing Zhao, Hongju Wang, Meiqing Shi, Xiangnan Li, Kai Jiang, Dapeng Wu
Summary: In this study, a floating catalytic foam was designed and prepared to enhance the mass transfer in immobilized photocatalysts for wastewater treatment. The floating catalytic foam could float on the water surface and establish a temperature gradient, effectively promoting the diffusion and adsorption of target molecules during the photocatalytic process.
JOURNAL OF HAZARDOUS MATERIALS
(2024)
Article
Engineering, Environmental
Muhammad Nafees, Adiba Khan Sehrish, Sarah Owdah Alomrani, Linlin Qiu, Aasim Saeed, Shoaib Ahmad, Shafaqat Ali, Hongyan Guo
Summary: The accumulation of cadmium and antibiotics in edible plants and fertile soil is a worldwide problem. This study investigated the potential of zinc oxide nanoparticles to alleviate the toxicity of both cadmium and antibiotics and promote spinach growth.
JOURNAL OF HAZARDOUS MATERIALS
(2024)
Article
Engineering, Environmental
Lurui Wan, Kai Wang, Yuan Chen, Zhiyong Xu, Wenbo Zhao
Summary: In this study, a low viscosity and high thermal stability SO2 absorbent with dual interacting sites was successfully synthesized. The absorbent showed the highest absorption enthalpy change and entropy change values among reported SO2 absorbents, and exhibited lower viscosity and comparable thermal stability to ILs.
JOURNAL OF HAZARDOUS MATERIALS
(2024)
Article
Engineering, Environmental
Zhengwei Zhou, Guojie Ye, Yang Zong, Zhenyu Zhao, Deli Wu
Summary: This study utilized Mo powder and STPP to enhance the performance of the sodium percarbonate system in pollutant degradation. The presence of Mo and STPP resulted in a higher degradation rate of the model pollutant SMX, with low oxidant consumption. The system generated multiple active species through a series of chain reactions at different pH values, exhibiting excellent performance towards electron-rich pollutants. Furthermore, Mo demonstrated excellent stability and reusability.
JOURNAL OF HAZARDOUS MATERIALS
(2024)