Article
Engineering, Environmental
Lu Dong, Hai Wang, Yaji Huang, Hao Chen, Haoqiang Cheng, Lingqin Liu, Ligang Xu, Jianrui Zha, Mengzhu Yu, Sheng Wang, Yufeng Duan
Summary: Magnetic manganese-iron modified attapulgite sorbents were synthesized and shown to have optimal Hg-0 removal activity in coal-fired flue gas under certain conditions, which could potentially reduce costs and maximize the utilization of green energy sources.
CHEMICAL ENGINEERING JOURNAL
(2021)
Article
Energy & Fuels
Qihuang Huo, Yahui Wang, Huijun Chen, Yu Feng, Lina Han, Wei Xie, Jiancheng Wang, Weiren Bao, Liping Chang, Kechang Xie
Summary: A novel sulfur hybrid mercury sorbent was successfully prepared by chemically activating high inorganic sulfur coal using potassium hydroxide, which showed excellent mercury removal performance at high temperatures, high specific surface area, and adsorption capacity, as well as good resistance to various gases.
Article
Energy & Fuels
Jianping Yang, Qin Li, Wenbing Zhu, Wenqi Qu, Min Li, Zhengyong Xu, Zequn Yang, Hui Liu, Hailong Li
Summary: This study utilized the abundant mineral chalcopyrite as an efficient trap for Hg-0 sequestration, showing excellent removal performance in a wide temperature range and minimal interference from typical flue gas components. The adsorption capacity and rate of CuFeS2 were significantly higher than commercial activated carbons, attributed to the oxidizing and immobilizing abilities of disulfide ligands, and the sorbent could be regenerated through thermal decomposition, saving operation costs. CuFeS2 is identified as a potential, cost-effective trap for efficient remediation of Hg-0 from coal combustion flue gas.
Article
Chemistry, Physical
Mengli Zhou, Yang Xu, Guangqian Luo, Qingzhu Zhang, Lin Du, Zehua Li
Summary: This study prepared Ce-Fe binary oxide modified bentonite for mercury removal from flue gas. The modified bentonite showed better removal performance and the removal mechanism was revealed. Furthermore, the deactivated modified bentonite can be effectively regenerated after thermal treatment.
APPLIED SURFACE SCIENCE
(2022)
Review
Engineering, Environmental
Honghu Li, Xiyan Peng, Miao An, Jingdong Zhang, Yanxiao Cao, Wenjie Liu
Summary: Adsorption and catalytic oxidation are the most cost-effective and feasible methods for Hg0 removal from coal-fired flue gas. However, SO2 poisoning remains a challenge for the long-term operation of most developed catalysts/sorbents. This review comprehensively discusses the negative effect of SO2 on mercury removal and proposes strategies to cope with the SO2 poisoning problem.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Energy & Fuels
Huan Liu, Zhuo Xiong, Rong Peng, Bengen Gong, Lin Chang, Jianping Yang, Yongchun Zhao, Junying Zhang
Summary: The study investigated the efficacy of CuBr2-TCS as an adsorbent for removing Hg-0 in simulated coal-fired flue gas, demonstrating high removal efficiency. The in-depth exploration of Hg-0 removal performance under different flue gas components proved that CuBr2-TCS has a good removal effect on Hg-0.
Article
Energy & Fuels
Qihuang Huo, Yahui Wang, Huijun Chen, Yu Feng, Lina Han, Weiren Bao, Liping Chang, Jiancheng Wang, Kechang Xie
Summary: It is a win-win strategy to prepare mercury sorbents from low-cost high-sulfur raw materials. In this work, a two-step preparation method is developed to prepare mercury sorbents from high organic sulfur coal. The first step is the co-pyrolysis/carbonization of Fe2O3 and coal, converting organic sulfur into FeSx. The second step is KOH activation, converting FeSx into various S species. The prepared sorbents show excellent mercury removal performance.
Article
Engineering, Chemical
Hengyuan Ran, Hui Wang, Jingmao Wu, Yiming Zhu, Jianfei Wu, Haotian Shen
Summary: This study investigated the interference effect of H2O on mercury removal in an oxyfuel-combustion atmosphere. The presence of H2O along with other gases affected the mercury removal process and exhibited different behaviors in various atmospheric conditions.
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
(2021)
Article
Energy & Fuels
Xin Huang, Zijun Ran, Zhi He, Jingyu Ran
Summary: Mercury, mainly derived from coal-fired power plants, has a significant impact on the environment. In this study, we propose a potential method for efficient removal of Hg0 through oxidation reactions using Ce-doped LaCoO3 supported on CeO2 catalyst. The catalyst characterization results confirm the successful substitution of Co with Ce in the LaCoO3 crystal lattice. The Hg0 removal experiments demonstrate that the La0.875Ce0.125CoO3/CeO2 catalyst exhibits the highest removal efficiency, and the presence of O2 greatly enhances its effectiveness. The addition of H2O and SO2 reduces the Hg0 removal efficiency due to competitive adsorption, but the presence of O2 allows SO2 to react with Hg0 and recover the efficiency.
Article
Environmental Sciences
Forouzan Vakili, Alimorad Rashidi, Lobat Taghavi, Nabiollah Mansouri
Summary: The study presents the synthesis of a nitrogen and sulfur dual-doped waste-derived graphene-like nanoporous carbon and investigates its capability in removing mercury vapor from gas streams. The doped graphene-like carbon nanosheets showed enhanced activity towards mercury vapor adsorption compared to pristine graphene-like carbon. The best performing sample achieved 94.5% mercury removal, outperforming sulfur-impregnated commercial activated carbon.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2021)
Article
Engineering, Environmental
Xue-Lei Duan, Chun-Gang Yuan, Qi Guo, Sheng-Li Niu, Kai-Qiang He, Guo-Wei Xia
Summary: A multifunctional core-shell sorbent based on halloysite nanotubes was successfully fabricated and applied for Hg-0 removal from flue gas. The unique structure and composition not only enabled easy separation and reuse, but also significantly enhanced the adsorption capacity and SO2 tolerance of the sorbent.
JOURNAL OF HAZARDOUS MATERIALS
(2021)
Article
Engineering, Environmental
Dong Ye, Xiaoxiang Wang, Runxian Wang, Senyuan Wang, Hui Liu, Haining Wang
Summary: This review discusses the progress in the application of MnO2-based materials for mercury removal, summarizing the fundamentals of MnO2, the properties of various adsorbents, and the effects of gas species on mercury capture capacity. The possible mercury adsorption mechanisms and regeneration methods are also explored, with a suggestion for the development of new MnO2-based adsorbents for future research.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2021)
Article
Chemistry, Physical
Mei-Hua Zhao, Xiang Bai, Xing Fan, Yan Li, Yi Liu, Jin-Li Huang, Wen-Long Mo, Xian-Yong Wei, Binoy K. Saikia
Summary: Porous activated carbon was prepared from industrial coal sludge by one-step pyrolysis and KHCO3 activation and used for phenol removal from water. The activation parameters affected the characteristics of activated carbon and phenol adsorption. CSAC-900 exhibited abundant pores and a three-dimensional structure. The adsorption of phenol on CSAC-900 was controlled by various mechanisms, and the Langmuir model described the adsorption isotherm. The maximum adsorption capacity of phenol on CSAC-900 was 305.83 mg/g. The positive ΔH and negative ΔG indicated that the adsorption was spontaneous and endothermic. Compared to commercial activated carbon, CSAC-900 showed advantages in adsorption capacity and rate, and could be regenerated and recycled.
JOURNAL OF MOLECULAR LIQUIDS
(2023)
Article
Engineering, Environmental
Yang Xu, Guangqian Luo, Qingzhu Zhang, Wei Cui, Zehua Li, Shibo Zhang
Summary: Novel waste-derived sorbents synthesized through one-step co-pyrolysis of wood and PVC have shown good stability in Hg and halogens removal, with Fe doping further enhancing the stability. Kinetic analysis revealed different rate-limiting steps before and after Fe doping, and water-washing pretreatment can remove loosely-bonded halogens while retaining essential halogens for Hg removal.
JOURNAL OF HAZARDOUS MATERIALS
(2021)
Article
Engineering, Environmental
Feng Xin, Rihong Xiao, Yongchun Zhao, Junying Zhang
Summary: This research proposes a method to reduce elemental mercury emission from coal-fired power plants by modifying magnetospheres with H2S as a sorbent. The modified magnetospheres show high affinity towards Hg-0 and can achieve over 80% adsorption efficiency. The technology has low cost, high recyclability, and minimal impact on environmental mercury pollution.
CHEMICAL ENGINEERING JOURNAL
(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.