Article
Environmental Sciences
Ye Liu, Chenglong Ma, Jiacheng Zhou, Lin Zhu, Limei Cao, Ji Yang
Summary: In this study, an ultra-high efficiency catalyst sorbent-Se-x/Activated carbon (Se-x/AC) was synthesized and applied to remove elemental mercury (Hg-0) in coal combustion flue gas. The Se-x/AC exhibited 120 times better adsorption performance compared to conventional activated carbon. The ultra-high mercury removal performance was found to originate from the activated Se species in Se-x/AC, which chemically adsorbed and captured Hg-0 in the flue gas.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2022)
Article
Engineering, Environmental
Ruize Sun, Biao Fu, Guangqian Luo, Xian Li, Hong Tian, Hong Yao
Summary: Halogenated activated carbon adsorbents demonstrate superior mercury capture performance in flue gas. This study investigated the bonding nature of spent halogenated activated carbon adsorbents at the atomic level, revealing that mercury attaches to the carbonaceous surface with a weak interaction in certain cases, providing insights for fabricating more environmentally friendly mercury removal adsorbents in the future.
CHEMICAL ENGINEERING JOURNAL
(2022)
Article
Engineering, Environmental
Ruize Sun, Guangqian Luo, Xian Li, Hong Tian, Hong Yao
Summary: Sulfur impregnated activated carbon is a promising adsorbent for mercury removal in flue gas, while the addition of Sn allotropes has a minimal impact on Hg-0 removal performance. Furthermore, S-4 and S-5 attached to the carbonaceous surface can enhance Hg-0 adsorption performance and form S-Hg and C-Hg bonds in the products.
CHEMICAL ENGINEERING JOURNAL
(2021)
Article
Energy & Fuels
Wangsheng Yu, Lei Zhang, He Xu, Hui Wang, Xu Peng, Shengji Wu, Wei Yang, Jie Zhou
Summary: Transition metal oxide-supported activated carbon prepared by non-thermal plasma treatment showed higher Hg-0 removal efficiency and stability compared to those prepared by conventional heat treatment in this study.
Article
Energy & Fuels
Qiang Lyu, Yinhe Liu, Yu Guan, Xuan Liu, Defu Che
Summary: The deeper the target reservoir of natural gas, the higher the mercury concentration in the product stream. This poses a serious threat to equipment safety and human health. This study investigates the adsorption, oxidation, and desorption behaviors of mercury over Se-modified activated carbon in natural gas for the first time. The results reveal the excellent performance of Se-modified activated carbon in heterogeneous mercury removal.
Article
Biotechnology & Applied Microbiology
Mochammad Arief Budihardjo, Yudha Gusti Wibowo, Bimastyaji Surya Ramadan, Muhamad Allan Serunting, Eflita Yohana, Syafrudin
Summary: This study focuses on using activated carbon from peat soil and coal, as well as CaO from clamshell byproducts, to reduce mercury content in artificial landfill leachate. Results show that mercury reduction was successful by 81% during the adsorption process at different pH levels.
ENVIRONMENTAL TECHNOLOGY & INNOVATION
(2021)
Article
Engineering, Environmental
So Yeon Yoon, Seok Byum Jang, Kien Tiek Wong, Hyeseong Kim, Min Ji Kim, Choe Earn Choong, Jae-Kyu Yang, Yoon-Young Chang, Sang-Eun Oh, Yeomin Yoon, Min Jang
Summary: This study demonstrates that sulfur-anchored palm shell waste activated carbon powder (PSAC-S) has high Hg(II) adsorption capacity and stable adsorption behavior in water solutions. PSAC-S prepared using a one-pot wet impregnation method is suitable for a wide range of solution pH values.
JOURNAL OF HAZARDOUS MATERIALS
(2021)
Article
Water Resources
Davidson Egirani, Mohd T. Latif, Napoleon Wessey, Nanfe . R. Poyi, Nabila Shehata
Summary: Two forms of activated carbon, granular and powdered, were tested for mercury removal in solution using African palmae shell as precursor. The results showed that powdered activated carbon demonstrated the highest adsorption efficiency with 93%, while granular activated carbon showed 92% efficiency in terms of contact time.
APPLIED WATER SCIENCE
(2021)
Article
Environmental Sciences
Mohamed Bakry Masod, Ahmed El-Fiqi, Mohamed A. Ebiad
Summary: In this study, calcium alginate/activated carbon composite microspheres were prepared by encapsulating traditional AC powder into calcium alginate microspheres. The adsorption affinity of the composite microspheres towards elemental mercury was enhanced by ammonium iodide treatment. The experimental results demonstrate that the NCA composite microspheres show great potential as adsorbents for removing mercury from natural gas.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2023)
Article
Energy & Fuels
Sinang Choi, Sang-Sup Lee
Summary: Activated carbon injection upstream of a particulate matter control device is commonly used to control mercury in coal-fired flue gas. Nitrogen oxides and hydrogen chloride can enhance the efficiency of activated carbon for mercury removal. Among different chloride compounds impregnated on activated carbon, copper chloride impregnated activated carbon showed the highest mercury adsorption efficiency under specific conditions.
Article
Engineering, Environmental
Masaki Takaoka, Yingchao Cheng, Kazuyuki Oshita, Tomoaki Watanabe, Shoji Eguchi
Summary: Installing a fabric filter (FF) and selective catalytic reactor (SCR) at crematoria can effectively remove mercury, with removal efficiency ranging from 87.5-99.9%. Pre-treating with a mixture of lime and activated carbon effectively suppresses peak mercury concentrations at the outlet of the SCR.
PROCESS SAFETY AND ENVIRONMENTAL PROTECTION
(2021)
Article
Energy & Fuels
Yuyingnan Liu, Xinrui Xu, Bin Qu, Xiaofeng Liu, Weiming Yi, Hongqiong Zhang
Summary: In this study, corn cob was used to prepare activated carbon with high adsorption capacity for mercury ions using KOH and KMnO4 modifications. The optimal conditions for mercury ion adsorption were determined through experiments, and the adsorption process was found to mainly involve physical adsorption, surface complexation, and ion exchange.
Article
Energy & Fuels
Yuan Qin, Chi Wang, Xin Sun, Yixing Ma, Xin Song, Fei Wang, Kai Li, Ping Ning
Summary: The simultaneous removal catalysts for SO2, NOx, and Hg-0 were prepared using walnut shell based carbon, with a focus on the effect of carbonization temperature on the surface and structural properties. Research found that Fe dominates among transition metals, and Fe/WSC catalyst can achieve over 80% simultaneous removal efficiency within a specific temperature range.
Article
Engineering, Chemical
Regina Rodriguez, Domenic Contrino, David Mazyck
Summary: The study compared bituminous coal-based activated carbon with coconut shell and wood-based activated carbons for elemental mercury removal, finding that bituminous coal-based AC showed better performance due to more carbene sites. Treating AC with nitric acid increased oxygen functional groups on the surface, leading to improved mercury removal. Heat treatments post-oxidation created free carbene sites, which were found to be more reactive to mercury adsorption than oxygen, ultimately being the most compelling mercury removal mechanism.
Article
Engineering, Environmental
Qingyu Ji, Guangqian Luo, Mengting Shi, Renjie Zou, Can Fang, Yang Xu, Xian Li, Hong Yao
Summary: This study proposes a cost-effective and efficient method using non-thermal plasma (NTP) to accelerate the reactions between H2S and SO2 on activated carbon (AC) to improve elemental mercury (Hg0) removal performance. The NTP treatment was found to significantly increase the reaction rate between H2S and SO2 on AC, leading to improved Hg0 removal efficiency.
CHEMICAL ENGINEERING JOURNAL
(2021)
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.