Article
Nanoscience & Nanotechnology
Haiyan Xu, Jinqing Wang, Xiaohan Yang, Liping Ning
Summary: An amphiphilic and magnetically recyclable graphene oxide demulsifier was synthesized by grafting magnetic nanoparticles and ethylenediamine onto the GO surface, exhibiting favorable demulsification performance for crude oil-in-water emulsions under various pH conditions. The MR-GO can be reused multiple times with consistent high demulsification efficiency. Through a combination of interfacial adsorption interactions, electrostatic attraction, and external mechanical forces, the demulsifier disrupts and stabilizes the emulsion interface, facilitating the rapid gathering of oil droplets to accomplish demulsification.
ACS APPLIED MATERIALS & INTERFACES
(2021)
Article
Environmental Sciences
Ning Hou, Xin Zhao, Ziyi Han, Xinxin Jiang, Yongping Fang, Yun Chen, Dapeng Li
Summary: The inability to demulsify oil-in-water emulsions efficiently is a challenging problem in industrial processes. In this study, the demulsification mechanism of a protein demulsifier was analyzed, and it was found that the demulsifier adsorbed at the oil-water interface and increased its hydrophobicity to break the emulsified system. A magnetic modification technique was proposed to improve the demulsification efficiency and reusability. This work provides insights into the demulsification mechanisms of protein demulsifiers and offers a promising technique for the development of biodemulsifiers for oil-water separation.
Article
Chemistry, Physical
Omer Yasin Thayee Al-Janabi, Hiba A. Abdulkareem, Ibrahim F. Waheed, Peter J. S. Foot
Summary: In this study, a novel magnetic nanodemulsifier (MND) has been successfully synthesized, which can effectively demulsify water-in-crude oil emulsions and exhibits good reusability under different conditions.
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
(2023)
Article
Chemistry, Physical
Haiyan Xu, Xiaohan Yang, Yi Qin, Yueyi Wang
Summary: In this study, a magnetically recyclable diatomite-graphene oxide (M-DM-GO) composite was developed for the separation of micro-sized oil droplets from crude oil-in-water emulsion. The composite exhibited superior adsorption performance and cost-effectiveness, and demonstrated favorable demulsification performances under a wide range of pH conditions. Additionally, the magnetic response capability enabled efficient demulsification and recyclability of the composite.
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
(2022)
Article
Materials Science, Paper & Wood
Liwei Shen, Tianqi Liu, Kecang Huang, Dalei Zhang, Xincai Luo, Ying Yang, Xuening Feng, Zejun Zhang, Fan Ye, Yuanzhu Mi
Summary: A RH-NH2 demulsifier was prepared for the separation of stable oil-in-water emulsions. The demulsifier showed high efficiency in removing oil from the emulsion, and can potentially be used in industrial applications due to its low cost.
Article
Environmental Sciences
Liwei Shen, Wenxiang Hu, Zhiyun Lei, Jianguo Peng, Enxiong Zhu, Xuanwei Zhang, Ming Yang, Xuening Feng, Ying Yang, Yuanzhu Mi
Summary: The GO@SiO2 nanocomposite was prepared by coating nanoscale silica onto graphene oxide and characterized with SEM, XRD, and FT-IR. It showed good demulsifying performance in both O/W and W/O emulsions, with high removal rates and salt tolerance under acidic conditions. The efficiency of demulsifying the W/O emulsion at 70 degrees C reached 80.5% when the concentration was 400 ppm.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2021)
Article
Energy & Fuels
Milad Agah, Mojtaba Binazadeh, Nazanin Baghulifard, Mehran Sarani
Summary: In this study, carboxymethyl cellulose (Walocel) and methyl cellulose-E5 were found to be more effective for deionized water-in-crude oil demulsification. The presence of ions slowed down the demulsification of Methocel-E5 more than that of Walocel, likely due to the different hydrogen bond strength and van der Waals interactions with water molecules. The polar 2-hydroxypropyl substitutes in Methocel E5 resulted in much less effective saline demulsification compared to Walocel.
Article
Engineering, Environmental
Yong Xu, Gang Wang, Lijing Zhu, Wanshun Deng, Chunting Wang, Tianhui Ren, Baikang Zhu, Zhixiang Zeng
Summary: Inspired by the water collection and water retention of the Stenocara beetle's back, magnetic graphene oxide composite with beetle-like microstructure was successfully fabricated for efficient demulsification in oil-water separation.
CHEMICAL ENGINEERING JOURNAL
(2022)
Article
Energy & Fuels
Xin Wei, Han Jia, Hui Yan, Xiaolong Wen, Ziwei Wei, Bowen Wang, Xu Li, Zhe Wang, Pan Huang, Dexin Liu
Summary: This study investigates the interfacial interaction between graphene oxide (GO) nanosheets and asphaltene molecules in crude oil using molecular dynamics simulation. The results show that the surface charge density of GO nanosheets has a significant impact on the stability of oil-in-water emulsion.
Article
Environmental Sciences
Fan Ye, Zejun Zhang, Yiling Ao, Bin Li, Lihan Chen, Liwei Shen, Xuening Feng, Ying Yang, Huaikui Yuan, Yuanzhu Mi
Summary: The environmentally friendly and amphipathic rice husk carbon (RHC) demulsifier prepared in this study showed high efficiency in removing emulsified water from water-in-crude oil emulsion. With 600 mg/L of RHC at 70 degrees C, the dehydration efficiency reached as high as 96.99%, demonstrating its effectiveness under neutral conditions.
Article
Chemistry, Physical
Huaikui Yuan, Zhiming Huang, Liwei Shen, Junbo Xu, Xuening Feng, Ying Yang, Zejun Zhang, Yue Luo, Xuemin Yan, Yuanzhu Mi
Summary: Biomass-based composite materials, specifically carbonized cotton coated with SiO2, synthesized using degreasing cotton and tetraethyl orthosilicate, show high demulsification efficiency in separating water-containing crude oil, indicating promising application prospects in the oil industry. The study investigated the optimal conditions and mechanism for demulsification, including dosage, settling time, temperature, dynamic interfacial tension, interfacial activity, and wettability. Additionally, observations of flocculation, aggregation of water droplets, and oil-water separation in the emulsion were made using optical microscopy.
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
(2021)
Article
Chemistry, Physical
Zejun Zhang, Guosheng Ai, Guanxin Zeng, Huaikui Yuan, Ying Yang, Liwei Shen, Xuening Feng, Fan Ye, Yuanzhu Mi
Summary: A three-branch structure demulsifier (GTE-DDA) was synthesized and showed high demulsification efficiency at lower temperatures and excellent salt tolerance for the treatment of crude oil emulsions.
JOURNAL OF MOLECULAR LIQUIDS
(2022)
Article
Chemistry, Physical
Liwei Shen, Guosheng Ai, Yiling Ao, Guanxin Zeng, Ying Yang, Xuening Feng, Zejun Zhang, Huaikui Yuan, Fan Ye, Yuanzhu Mi
Summary: CRB-SiO2, a cost-efficient and environmentally friendly demulsifier, shows excellent demulsification efficiency and tolerance to salt, acid, and alkali, potentially applicable in the petrochemical industry.
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
(2021)
Article
Energy & Fuels
Fan Ye, Yuanzhu Mi, Huanyu Liu, Guanxin Zeng, Liwei Shen, Xuening Feng, Ying Yang, Zejun Zhang, Huaikui Yuan, Xuemin Yan
Summary: Efficient, environmentally-friendly, and low-cost demulsifiers for the separation of oil?water emulsion are actively sought after in the oil industry. The use of natural lotus leaf to prepare a HLLF demulsifier has successfully achieved a demulsification efficiency of up to 88.17% for water-in-crude oil emulsions. The micro-nano structure of HLLF contributes to its outstanding demulsification ability, showing promising application prospects in the oil industry.
Review
Energy & Fuels
Saidulla Faizullayev, Akbota Adilbekova, Wojciech Kujawski, Mojtaba Mirzaeian
Summary: The oil industry is facing the issue of crude oil emulsions formation, requiring the research and development of more environmentally friendly and cost-efficient demulsifiers and methods.
JOURNAL OF PETROLEUM SCIENCE AND ENGINEERING
(2022)
Article
Chemistry, Multidisciplinary
Huanjiang Wang, Juan Liu, Haiyan Xu, Zhanwei Ma, Weihong Jia, Sili Ren
Article
Energy & Fuels
Huanjiang Wang, Haiyan Xu, Weihong Jia, Juan Liu, Sili Ren
Article
Polymer Science
Hongxia Liu, Huanjiang Wang, Weihong Jia, Haiyan Xu, Sili Ren
JOURNAL OF APPLIED POLYMER SCIENCE
(2018)
Article
Chemistry, Physical
Huanjiang Wang, Haiyan Xu, Weihong Jia, Sili Ren
JOURNAL OF DISPERSION SCIENCE AND TECHNOLOGY
(2018)
Review
Biochemistry & Molecular Biology
Huan-Jiang Wang, Yong-cheng Wang
JOURNAL OF MOLECULAR MODELING
(2014)
Article
Chemistry, Inorganic & Nuclear
Yan-zi Jin, Yong-cheng Wang, Zhi-yuan Geng, Huan-jiang Wang, Yan-Zhen Gan
JOURNAL OF ORGANOMETALLIC CHEMISTRY
(2012)
Article
Thermodynamics
Haiyan Xu, Huanjiang Wang, Weihong Jia, Sili Ren, Jinqing Wang
INTERNATIONAL JOURNAL OF GREEN ENERGY
(2019)
Article
Chemistry, Multidisciplinary
Hailiang Hu, Huan Yang, Xiuyan Yang, Ran Wang, Lan Zhou, Yi Dai, Ningning Ji, Huanjiang Wang, Zhiqiang Shi, Guoyong Zhou, Baokuan Chen, Yingchun Luo, Chaozheng He
CHINESE CHEMICAL LETTERS
(2020)
Article
Chemistry, Multidisciplinary
Jungang Wang, Shanghui Yang, Qiling Zou, Huanjiang Wang, Hongqing Li
Summary: This study describes the synthesis and X-ray structure of a novel glycoluril derivative. The compound crystallized in an unusual as conformation, influenced by solvation effect, hydrogen bonding, and space-occupying effect. The X-ray crystallographic analysis provides evidence of the as conformation of the glycoluril derivative and demonstrates the impact of solvent water on its conformational behavior.
JOURNAL OF CHEMICAL RESEARCH
(2021)
Review
Chemistry, Physical
Bo Yang, Lanxing Gao, Miaoxuan Xue, Haihe Wang, Yanqing Hou, Yingchun Luo, Han Xiao, Hailiang Hu, Can Cui, Huanjiang Wang, Jianhui Zhang, Yu-Feng Li, Gang Xie, Xin Tong, Yadian Xie
Summary: This paper introduces the structure and properties of carbon nano-materials, as well as the preparation methods and influencing factors. Through simulation, optimization of reactions and control of growth modes are emphasized for controllable growth of carbon nano-materials.
Article
Chemistry, Physical
Huanjiang Wang, Yuchen Zhang, Dan Luo, He Wang, Yurong He, Fei Wang, Xiaodong Wen
Summary: In addition to the main reaction, understanding the structure-activity relationship in the side reactions is another important goal for catalysis science. In this study, the catalytic activities and selectivities of various active metals were investigated in the reductive amination of furfural (FAL). It was observed that Ru-based catalysts showed higher hydrogenation of furfurylamine (FAM) at a much higher reaction temperature compared to Co-and Ni-based catalysts (130 vs. 50 degrees C), indicating the influence of active metal on the excessive hydrogenation of FAM. The evaluation of FAM hydrogenation further supported the relationship between H2 reaction pressure and catalytic activity.
MOLECULAR CATALYSIS
(2023)
Article
Chemistry, Applied
Jingjing Wu, Yongcheng Wang, Jun Cai, Yanzi Jin, Huanjiang Wang, Yanzhen Gan
CHINESE JOURNAL OF CATALYSIS
(2014)
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.
