Article
Engineering, Environmental
Feng Shi, Jia-nan Gu, Diwen Ying, Kan Li, Naiqiang Yan, Juexiu Li, Jinping Jia
Summary: This study investigates a combined system of Na2SO3 wet absorption bipolar membrane electrodialysis for efficient absorption and regeneration of SO2 from industrial flue gas. The results show that high absorption and regeneration efficiencies can be achieved by simultaneous addition of acid and alkali, reaching 100% efficiency.
CHEMICAL ENGINEERING JOURNAL
(2022)
Article
Energy & Fuels
John H. Jacobs, Nancy Chou, Kevin L. Lesage, Ye Xiao, Josephine M. Hill, Robert A. Marriott
Summary: Activated carbons have been found to possess good selective adsorption capability for removing sulfur dioxide from flue gas, especially in the presence of water. The activated carbons prepared with KOH and NaOH showcased the highest SO2 adsorption capacity under wet conditions. Additionally, the adsorption performance of all activated carbons remained unchanged after multicomponent adsorption of wet SO2.
Article
Microbiology
Gregory Martin, Shagun Sharma, William Ryan, Nanda K. Srinivasan, John M. Senko
Summary: The microbial communities in wet flue gas desulfurization systems of coal-fired power plants can adapt to extreme physicochemical conditions, with active organisms metabolizing at high temperatures. Metatranscriptomic analysis revealed the presence of active microbial taxa associated with carbohydrate metabolism, osmotic stress response, and genetic elements in the wet flue gas desulfurization system. These microbial activities may have implications for the performance and environmental impacts of thermoelectric power plants.
FRONTIERS IN MICROBIOLOGY
(2021)
Article
Engineering, Environmental
Yanni Xuan, Haitao Gao, Hong Tian, Zhangmao Hu, Jingjing Ma, Qingbo Yu
Summary: Ce-modified Mn3O4/diatomite sorbents with different Ce/Mn molar ratios were prepared by the sol-gel method to improve the desulfurization performance of single Mn-based sorbents. Results showed that the addition of CeO2 significantly enhanced the desulfurization activity by forming strong redox couples with Mn3O4. The designed CeO2-Mn3O4 binary oxides with a micro-reticulated framework restrained the agglomeration of active component and provided more active sites, leading to improved utilization of active component.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Green & Sustainable Science & Technology
Liang Ma, Xiaoxu Duan, Jiwei Wu, Jianping Li, Lv Peng, Liwang Wang, Lingyu Xiao
Summary: This study proposes a new flue gas purification technology that achieves integrated and efficient desulfurization and denitrification by combining jet atomization and swirl enhancement. Industrial tests show that the technology has a high purification efficiency, helping enterprises save costs and protect the environment.
JOURNAL OF CLEANER PRODUCTION
(2022)
Article
Polymer Science
Mingjing Li, Guodong Huang, Bo Wang, Yi Cui, Binbin Chang, Qiaoqiao Yin, Ming Ge, Shuwei Zhang, Qi Wang, Jiacheng Feng
Summary: The addition of granulated blast furnace slag, fly ash, and solid sodium silicate can significantly improve the compressive strength and setting time of flue gas desulfurization gypsum polymer. Their incorporation promotes the formation of silicate and aluminosilicate minerals, which is the main reason for the increased strength and accelerated coagulation.
Article
Green & Sustainable Science & Technology
Jonghun Lim, Hyungtae Cho, Junghwan Kim
Summary: By optimizing the wet flue gas desulfurization system using recycled waste oyster shells as substitutes for high-grade limestone, efficiency can be improved, costs reduced, and reliance on limited resources decreased. Waste oyster shells can serve as excellent substitutes for high-quality limestone, offering significant environmental and economic benefits.
JOURNAL OF CLEANER PRODUCTION
(2021)
Review
Engineering, Environmental
Che-Jung Hsu, John D. Atkinson, Adrienne Chung, Hsing-Cheng Hsi
Summary: Studies have shown that Hg-0 re-emission is influenced by various factors and can be restricted through the addition of inhibitors. This review summarizes the mechanisms of Hg-0 re-emission, updates misconceptions, and reviews the application of inhibitors.
JOURNAL OF HAZARDOUS MATERIALS
(2021)
Article
Energy & Fuels
Xiaoyu Chen, Pengxiang Sun, Lin Cui, Wenbo Xu, Yong Dong
Summary: Oxygen-enriched combustion is a promising technology for reducing CO2 emissions from coal burning. However, it leads to increased concentrations of CO2 and SO2 in the flue gas, posing a challenge for subsequent wet flue gas desulfurization (WFGD). In this study, limestone-based dual-loop WFGD technology was used to address this issue. The results show that dual-loop WFGD is more suitable for desulfurization after oxygen-enriched combustion compared to single-loop WFGD.
Article
Engineering, Chemical
Jie Zhu, Peng Zhao, Qian Zhang, Sudong Yang, Qiang Yan
Summary: This paper reports the experimental study on SO2 absorption in a bench-scale theta-ring packed tower using 0.3 mol.L-1 ethylenediamine-phosphoric acid solution, and investigates the effects of main technological parameters on desulfurization efficiency. A one-dimensional model incorporating equations for simulating chemical absorption of SO2 with packed tower is presented to uncover the mechanism behind the experimental observations. The results show that desulfurization efficiency is positively correlated with liquid-gas ratio, packing height, and ethylenediamine concentration, while negatively correlated with inlet SO2 concentration, S(IV) concentration of lean amine, and operating temperature.
SEPARATION AND PURIFICATION TECHNOLOGY
(2021)
Article
Thermodynamics
Miroslav Raudensky, Tereza Kudelova, Erik Bartuli, Tereza Kroulikova, Ilya Astrouski
Summary: Polymeric hollow fiber heat exchangers are ideal for flue gas cooling due to their corrosion resistance, self-cleaning capability, and high heat transfer coefficient.
CASE STUDIES IN THERMAL ENGINEERING
(2022)
Article
Engineering, Chemical
Mengxi Zhao, Changjun Zou
Summary: MgO nanofluids show better desulfurization effect in wet desulfurization process compared to MgO slurry by improving desulfurization efficiency. The density and viscosity of MgO nanofluids increase with concentration, but decrease with temperature. Properly reducing particle size can enhance the desulfurization efficiency of MgO absorbent in removing SO2 from flue gas.
Article
Energy & Fuels
Yuzhong Li, Wujun Zuo, Yupeng Feng, Hongwei Zhang, Yong Dong
Summary: The study found that in wet flue gas desulfurization systems, H2SO4 exists in both gaseous and aerosol forms at the inlet, and undergoes transformation in the scrubber. The amount of H2SO4 in aerosol form increased while the vapor form decreased, with demisters being more effective in reducing H2SO4 than droplets.
Article
Engineering, Environmental
Jiangyuan Qu, Nana Qi, Kai Zhang
Summary: The NOx removal performance in a wet flue gas desulfurization unit is investigated in this study. The results show that increasing the O3/NO molar ratio and decreasing the reaction temperature can improve the efficiency of NOx absorption in the scrubber. The absorption rate of NO2 is slower than that of N2O5 and is more sensitive to the chemical compositions and hydrodynamics.
PROCESS SAFETY AND ENVIRONMENTAL PROTECTION
(2022)
Article
Environmental Sciences
Chang Yuan, Siqian Su, Ruiguang Xu, Shengwen Liang, Hairong Cheng, Zhibing Yao, Luxiang Jiang, Zuwu Wang
Summary: This study investigated the effect of wet flue gas desulfurization (WFGD) on condensable particulate matter (CPM) in ultralow emission coal-fired power plants in Hunan province, China. The removal efficiencies of different components vary, with inorganic components being more efficiently removed compared to organic components.
ATMOSPHERIC POLLUTION RESEARCH
(2022)
Article
Energy & Fuels
Yingna Du, Chen Huang, Wei Jiang, Qiangwei Yan, Yongfei Li, Gang Chen
Summary: In this study, anionic surfactants modified hydrotalcite was used as a flow improver for crude oil under low-temperature conditions. The modified hydrotalcite showed a significant viscosity reduction effect on crude oil. The mechanism of the modified hydrotalcite on viscosity and pour point of crude oil was explored through characterization and analysis of the modified hydrotalcite and oil samples.
Article
Energy & Fuels
Mohammad Saeid Rostami, Mohammad Mehdi Khodaei
Summary: In this study, a hybrid structure, MIL-53(Al)@MWCNT, was synthesized by combining MIL-53(Al) particles and -COOH functionalized multi-walled carbon nanotube (MWCNT). The hybrid structure was then embedded in a polyethersulfone (PES) polymer matrix to prepare a mixed matrix membrane (MMM) for CO2/CH4 and CO2/N2 separation. The addition of MWCNTs prevented MIL-53(Al) aggregation, improved membrane mechanical properties, and enhanced gas separation efficiency.
Article
Energy & Fuels
Yunlong Li, Desheng Huang, Xiaomeng Dong, Daoyong Yang
Summary: This study develops theoretical and experimental techniques to determine the phase behavior and physical properties of DME/flue gas/water/heavy oil systems. Eight constant composition expansion (CCE) tests are conducted to obtain new experimental data. A thermodynamic model is used to accurately predict saturation pressure and swelling factors, as well as the phase boundaries of N2/heavy oil systems and DME/CO2/heavy oil systems, with high accuracy.
Article
Energy & Fuels
Morteza Afkhamipour, Ebad Seifi, Arash Esmaeili, Mohammad Shamsi, Tohid N. Borhani
Summary: Non-conventional amines are being researched worldwide to overcome the limitations of traditional amines like MEA and MDEA. Adequate process and thermodynamic models are crucial for understanding the applicability and performance of these amines in CO2 absorption, but studies on process modeling for these amines are limited. This study used rate-based modeling and Deshmukh-Mather method to model CO2 absorption by DETA solution in a packed column, validated the model with experimental data, and conducted a sensitivity analysis of mass transfer correlations. The study also compared the CO2 absorption efficiency of DETA solution with an ionic solvent [bmim]-[PF6] and highlighted the importance of finding optimum operational parameters for maximum absorption efficiency.
Article
Energy & Fuels
Arastoo Abdi, Mohamad Awarke, M. Reza Malayeri, Masoud Riazi
Summary: The utilization of smart water in EOR operations has gained attention, but more research is needed to understand the complex mechanisms involved. This study investigated the interfacial tension between smart water and crude oil, considering factors such as salt, pH, asphaltene type, and aged smart water. The results revealed that the hydration of ions in smart water plays a key role in its efficacy, with acidic and basic asphaltene acting as intrinsic surfactants. The pH also influenced the interfacial tension, and the aged smart water's interaction with crude oil depended on asphaltene type, salt, and salinity.
Article
Energy & Fuels
Dongao Zhu, Kun Zhu, Lixian Xu, Haiyan Huang, Jing He, Wenshuai Zhu, Huaming Li, Wei Jiang
Summary: In this study, cobalt-based metal-organic frameworks (Co-based MOFs) were used as supports and co-catalysts to confine the NHPI catalyst, solving the leaching issue. The NHPI@Co-MOF with carboxyl groups exhibited stronger acidity and facilitated the generation of active oxygen radicals O2•, resulting in enhanced catalytic activity. This research provides valuable insights into the selection of suitable organic linkers and broadens the research horizon of MOF hybrids in efficient oxidative desulfurization (ODS) applications.
Article
Energy & Fuels
Edwin G. Hoyos, Gloria Amo-Duodu, U. Gulsum Kiral, Laura Vargas-Estrada, Raquel Lebrero, Rail Munoz
Summary: This study investigated the impact of carbon-coated zero-valent nanoparticle concentration on photosynthetic biogas upgrading. The addition of nanoparticles significantly increased microalgae productivity and enhanced nitrogen and phosphorus assimilation. The presence of nanoparticles also improved the quality of biomethane produced.
Article
Energy & Fuels
Yao Xiao, Asma Leghari, Linfeng Liu, Fangchao Yu, Ming Gao, Lu Ding, Yu Yang, Xueli Chen, Xiaoyu Yan, Fuchen Wang
Summary: Iron is added as a flocculant in wastewater treatment and the hydrothermal carbonization (HTC) of sludge produces wastewater containing Fe. This study investigates the effect of aqueous phase (AP) recycling on hydrochar properties, iron evolution and environmental assessment during HTC of sludge. The results show that AP recycling process improves the dewatering performance of hydrochar and facilitates the recovery of Fe from the liquid phase.
Article
Energy & Fuels
He Liang, Tao Wang, Zhenmin Luo, Jianliang Yu, Weizhai Yi, Fangming Cheng, Jingyu Zhao, Xingqing Yan, Jun Deng, Jihao Shi
Summary: This study investigated the influence of inhibitors (carbon dioxide, nitrogen, and heptafluoropropane) on the lower flammability limit of hydrogen and determined the critical inhibitory concentration needed for complete suppression. The impact of inhibitors on explosive characteristics was evaluated, and the inhibitory mechanism was analyzed with chemical kinetics. The results showed that with the increase of inhibitor quantity, the lower flammability limit of hydrogen also increased. The research findings can contribute to the safe utilization of hydrogen energy.
Article
Energy & Fuels
Zonghui Liu, Zhongze Zhang, Yali Zhou, Ziling Wang, Mingyang Du, Zhe Wen, Bing Yan, Qingxiang Ma, Na Liu, Bing Xue
Summary: In this study, high-performance solid catalysts based on phosphotungstic acid (HPW) supported on Zr-SBA-15 were synthesized and evaluated for the one-pot conversion of furfural (FUR) to γ-valerolactone (GVL). The catalysts were characterized using various techniques, and the ratio of HPW and Zr was found to significantly affect the selectivity of GVL. The HPW/Zr-SBA-15 (2-4-15) catalyst exhibited the highest GVL yield (83%) under optimized reaction conditions, and it was determined that a balance between Bronsted acid sites (BAS) and Lewis acid sites (LAS) was crucial for achieving higher catalytic performance. The reaction parameters and catalyst stability were also investigated.
Article
Energy & Fuels
Michael Stoehr, Stephan Ruoff, Bastian Rauch, Wolfgang Meier, Patrick Le Clercq
Summary: As part of the global energy transition, an experimental study was conducted to understand the effects of different fuel properties on droplet vaporization for various conventional and alternative fuels. The study utilized a flow channel to measure the evolution of droplet diameters over time and distance. The results revealed the temperature-dependent effects of physical properties, such as boiling point, liquid density, and enthalpy of vaporization, and showed the complex interactions of preferential vaporization and temperature-dependent influences of physical properties for multi-component fuels.
Article
Energy & Fuels
Yuan Zhuang, Ruikang Wu, Xinyan Wang, Rui Zhai, Changyong Gao
Summary: Through experimental validation and optimization of the chemical kinetic model, it was found that methanol can accelerate the oxidation reaction of ammonia, and methanol can be rapidly oxidized at high concentration. HO2 was found to generate a significant amount of OH radicals, facilitating the oxidation of methanol and ammonia. Rating: 7.5/10.
Article
Energy & Fuels
Radwan M. EL-Zohairy, Ahmed S. Attia, A. S. Huzayyin, Ahmed I. EL-Seesy
Summary: This paper presents a lab-scale experimental study on the impact of diethyl ether (DEE) as an additive to waste cooking oil biodiesel with Jet A-1 on combustion and emission features of a swirl-stabilized premixed flame. The addition of DEE to biodiesel significantly affects the flame temperature distribution and emissions. The W20D20 blend of DEE, biodiesel, and Jet A-1 shows similar flame temperature distribution to Jet A-1 and significantly reduces UHC, CO, and NOx emissions compared to Jet A-1.
Article
Energy & Fuels
Jiang Bian, Ziyuan Zhao, Yang Liu, Ran Cheng, Xuerui Zang, Xuewen Cao
Summary: This study presents a novel method for ammonia separation using supersonic flow and develops a mathematical model to investigate the condensation phenomenon. The results demonstrate that the L-P nucleation model accurately characterizes the nucleation process of ammonia at low temperatures. Numerical simulations also show that increasing pressure and concentration can enhance ammonia condensation efficiency.
Article
Energy & Fuels
Shiyuan Pan, Xiaodan Shi, Beibei Dong, Jan Skvaril, Haoran Zhang, Yongtu Liang, Hailong Li
Summary: Integrating CO2 capture with biomass-fired combined heat and power (bio-CHP) plants is a promising method for achieving negative emissions. This study develops a reliable data-driven model based on the Transformer architecture to predict the flowrate and CO2 concentration of flue gas in real time. The model validation shows high prediction accuracy, and the potential impact of meteorological parameters on model accuracy is assessed. The results demonstrate that the Transformer model outperforms other models and using near-infrared spectral data as input features improves the prediction accuracy.