Article
Engineering, Chemical
Lijuan Huang, Yu Wang, Liang Zhang, Yuliang Su, Zhe Zhang, Shaoran Ren
Summary: This study comprehensively investigated the pressure influence on the flammability limits and explosion pressure of ethane and propane, revealing a logarithmic relationship between pressure and flammability limits, with propane having the highest explosion pressure. The explosion pressure showed an approximate linear relationship with initial pressure, highlighting the importance of combustion heat in the pressure dependence of the lower flammability limit.
JOURNAL OF LOSS PREVENTION IN THE PROCESS INDUSTRIES
(2022)
Article
Energy & Fuels
Yun Ge, Hong-Hao Ma, Jia-Wei Liu, Yuan Zeng, Jun Pan, Lu-Qing Wang
Summary: In this experiment, the explosion characteristics of hydrogen-propane-nitrous oxide mixtures were studied. The effects of equivalence ratio, propane fraction, and initial pressure on the explosion were analyzed. The results showed that propane addition could decelerate the explosion process, and higher initial pressure resulted in higher maximum explosion pressure. The presence of nitrous oxide significantly affected the stability of the explosion, and a small amount of propane could alter the explosion characteristics of the mixture.
Article
Engineering, Chemical
Hangwei Wan, Yuquan Wen, Sheng Niu, Yongsheng Jia, Qi Zhang
Summary: This study investigated the explosion characteristics and mechanism of Al/air, AlH3/air, and Al/AlH3/air systems through experiments and simulations. The results showed that the induction time of Al dust explosion was shorter than that of AlH3, but the explosion severity of Al dust was smaller than that of AlH3. The addition of AlH3 dust in the three-component system shortened the explosion induction time.
Article
Energy & Fuels
Xiaozhe Yu, Jianliang Yu, Chenyang Wang, Xianshu Lv, Yalei Wang, Yujie Hou, Xingqing Yan
Summary: The study found that hydrogen concentration has a significant impact on the maximum pressure rise and the maximum rate of pressure rise in hybrid explosions of hydrogen/aluminum dust, and the flame propagation velocity has different responses in three stages as the hydrogen concentration changes.
Article
Energy & Fuels
Enhua Shi, Xinfei Wang, Chang Qi, He Liang, Xingqing Yan, Jianliang Yu
Summary: The primary purpose of this study is to investigate the impact of water mist on the explosive characteristics of magnesium dust and to expand the inerting and suppression strategies for magnesium dust explosions. The results show that the addition of water mist can increase the explosivity of low-concentration magnesium dust, but has a suppressing effect on high-concentration magnesium dust. The suppression of magnesium dust explosions by water mist mainly relies on physical actions such as heat absorption, blocking thermal radiation, and diluting oxidizer concentration.
Article
Chemistry, Multidisciplinary
Meng Gu, Guoxin Chen, Haozhe Wang, Anfeng Yu, Xiaodong Ling, Junhai Li
Summary: In this study, seven deflagration tests of a propane-air mixture were conducted in a large-scale chamber to analyze the effects of initial volume, gas concentration, and initial turbulence intensity on deflagration characteristics. The main frequency of the explosion wave was determined using wavelet transform and energy spectrum analysis. The results showed that explosive overpressure is mainly influenced by turbulence and gas concentration. The study also calibrated a flame acceleration simulator numerical model and successfully simulated the leakage, diffusion, and explosion in a petrochemical enterprise, providing valuable information for evaluating personnel injury and building damage.
Article
Energy & Fuels
Xi Wang, Ligang Zheng, Jian Wang, Rongkun Pan, Wen Yang, Hongwang Jin, Yuanpeng Fu
Summary: Mixing biogas with other fuels or increasing the oxygen content in the oxidizer can enhance the combustion performance of biogas flames. Oxygen enrichment increases flame propagation velocity and explosion pressure, while propane addition decreases maximum flame velocity. Laminar burning velocity (LBV) is a crucial parameter for predicting maximum flame velocity and maximum rate of pressure rise values.
Article
Chemistry, Physical
Tao Wang, He Liang, Jingjing Lin, Zhenmin Luo, Hu Wen, Fangming Cheng, Jingyu Zhao, Bin Su, Ruikang Li, Xuhan Ding, Jun Deng
Summary: This study investigated the explosion thermal behavior of H-2/CH4/air mixtures at different equivalence ratios and hydrogen volume fractions. The results show that increasing the hydrogen volume fraction can increase peak explosion pressure and combustion index, while shortening the explosion duration. The information obtained can help in developing measures to prevent potential explosion accidents.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2022)
Article
Engineering, Environmental
Egidijus Rytas Vaidogas
Summary: This study examines the issue of assessing damage due to explosions of cylindrical pressure vessels, specifically focusing on predicting the arrangement of cracks in the vessel wall before the explosion, known as the failure pattern. It finds that Bayesian statistics can be used to estimate the probabilities of these failure patterns, and that the Dirichlet-multinomial model can handle the uncertainty in these probabilities. The study suggests that probabilistic prediction of failure patterns based on past accident data is the most practical way to assess potential vessel fragmentation.
PROCESS SAFETY AND ENVIRONMENTAL PROTECTION
(2021)
Article
Energy & Fuels
Shengchao Rui, Changjian Wang, Xinjiao Luo, Rulin Jing, Quan Li
Summary: The study investigated the effects of hydrogen concentration and ignition location on external explosions during vented hydrogen-air deflagrations in a cubic vessel. Different ignition locations resulted in variations in the maximum overpressure peaks and the impact of external explosions on flame evolution outside the vessel.
Article
Engineering, Chemical
Changshuai Zhang, Hongguang Dong, Yonghao Zhou, Sheng Shang, Wei Gao
Summary: The flame behavior and pressure characteristics of vented propane-air explosions in a narrow duct were studied by varying the equivalence ratio, venting diameter, and venting position. The results showed that the maximum reduced pressure and discharge efficiency were influenced by changes in venting diameter and position. The findings provide valuable insights for venting safety design in practical engineering applications.
JOURNAL OF LOSS PREVENTION IN THE PROCESS INDUSTRIES
(2023)
Article
Engineering, Chemical
Yi Liu, Jian Chen, Mingqi Bai, Zhongxu He, Chi-Min Shu, Nitin Roy
Summary: This study investigated the explosion characteristics of propane-dimethyl ether blends in a 20-L spherical explosion vessel. The effects of dimethyl ether addition and equivalence ratio were explored. The study also examined the influence of initial temperature and pressure on explosion characteristics. CHEMKIN software and a theoretical model were used to compare the calculated maximum explosion pressure with experimental results.
JOURNAL OF LOSS PREVENTION IN THE PROCESS INDUSTRIES
(2022)
Article
Energy & Fuels
Lu-Qing Wang, Hong-Hao Ma
Summary: Experiments were conducted to study the explosion dynamics of hydrogen-air mixtures in a flat vessel with annular obstacles. Results showed that explosion parameters varied depending on the measurement point location.
Article
Engineering, Environmental
Guochun Li, Chuanyu Pan, Yangpeng Liu, Xiaolong Zhu, Xiaomin Ni, Xiangdi Zhao, Guoxin Chen, Xishi Wang
Summary: The characteristics of water mist spray and the installation locations of the nozzles have significant effects on explosion mitigation, and K2CO3 additive can enhance the explosion mitigation effect of water mist, but its effect is weaker compared to changes in water mist characteristics.
PROCESS SAFETY AND ENVIRONMENTAL PROTECTION
(2021)
Article
Engineering, Environmental
Changshuai Zhang, Hongguang Dong, Sheng Shang, Kai Zhang, Yonghao Zhou, Wei Gao
Summary: The flame behavior and pressure characteristics of vented propane-air explosions at elevated static activation pressures were studied in a duct with a length-to-diameter ratio of 7. The influence of discharge traction and the coupling effect of internal flame front and pressure waves on flame propagation behavior were observed. Increasing the static activation pressure weakly affected the vented flame length and width under a fixed vent. The effects of elevated static activation pressures on pressure profiles and maximum reduced pressure were investigated.
PROCESS SAFETY AND ENVIRONMENTAL PROTECTION
(2023)
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.
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)