Article
Engineering, Chemical
Andrey Yu. Manakov, Konstantin E. Kuper, Arkadi N. Drobchik, Alexey K. Sagidullin, Matvei E. Semenov, Andrey S. Stoporev
Summary: This study investigates the formation of xenon hydrate in a water-in-oil emulsion using radiographic and DSC techniques. The results show that the formation process occurs in two stages, with hydrate proliferation near the emulsion-gas boundary in the first stage and slow growth throughout the sample in the second stage. The findings improve the understanding of hydrate growth kinetics in static water-in-oil emulsions.
CHEMICAL ENGINEERING SCIENCE
(2023)
Article
Engineering, Environmental
Yu Feng, Yang Zhao, Yuze Han, Yanzhen Liu, Lunxiang Zhang, Jiafei Zhao, Lei Yang, Yongchen Song
Summary: The formation and dissociation behavior of CO2 hydrates in the presence of clay particles were investigated using low-field nuclear magnetic resonance. It was found that montmorillonite particles significantly promoted the conversion of water into hydrate, while illite particles had a weaker promoting effect. According to the DLVO theory, the total interaction potential between montmorillonite particles was much higher than that between illite particles.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Energy & Fuels
Runcheng Zhang, Guodong Zhang, Fei Wang
Summary: The efficiency of hydrate formation in wet porous media was improved by increasing the exposure of the activated carbon bed, leading to fast hydrate nucleation and large methane uptake. The relationship between fluid dynamics and mass transfer during hydrate formation process was fully demonstrated by the phenomenon of rapid hydrate nucleation and significant methane absorption.
Article
Thermodynamics
Qi Zhao, Zhao-Yang Chen, Xiao-Sen Li, Zhi-Ming Xia
Summary: This study investigates the influence of an electrostatic field on the formation of CO2 hydrate in fresh water, memory water, and saltwater systems. Experimental results show that the presence of an electrostatic field can promote the nucleation and growth of CO2 hydrate. However, the electrostatic field weakens the memory effect in the memory water system and increases the completion time of hydrate formation in the salt water system.
Article
Energy & Fuels
Yu Liu, Jiateng Duan, Dianqiang Xu, Jiawei Chu, Shi Shen, Jiafei Zhao, Lanlan Jiang
Summary: The phase equilibria of different systems were investigated, and it was found that mineral oil and MEG shifted the phase equilibrium to different directions. The hydrate inhibition performance and generation characteristics of the composite formulation of Luvicap 55w and MEG were studied, and it was observed that increasing subcooling decreased the induction time and increased gas consumption. The induction time increased with increasing MEG concentration, confirming the synergistic effect of MEG in the oil-water emulsion for Luvicap 55w.
ENERGY SCIENCE & ENGINEERING
(2023)
Article
Thermodynamics
Ningru Sun, Ye Zhang, Gaurav Bhattacharjee, Yanjun Li, Nianxiang Qiu, Shiyu Du, Praveen Linga
Summary: Utilizing seawater for synthesizing methane hydrates reduces raw material cost and avoids water scarcity. Experimental results show that increasing temperature decreases the formation rate and methane storage capacity, while increasing pressure enhances these parameters. Structural and morphological analysis reveal the characteristics of synthesized hydrates.
Article
Energy & Fuels
Nithin B. Kummamuru, Sammy W. Verbruggen, Silvia Lenaerts, Patrice Perreault
Summary: This fundamental study proposes a new approach for promoting methane hydrates using stainless steel beads packed in an unstirred reactor. The results show that the use of 2 mm stainless steel beads provides more interstitial space and multiple nucleation sites, enhancing the kinetics of methane hydrate formation.
Article
Engineering, Environmental
Peng Xiao, Jia Li, Hong-Liang Zhang, Guang-Jin Chen, Chang-Yu Sun
Summary: The study found that single additives are not able to completely prevent hydrate agglomeration during the formation process, while the use of co-additives can effectively inhibit hydrate formation, especially maintaining anti-agglomeration effect even when reducing TBAB concentration.
CHEMICAL ENGINEERING JOURNAL
(2022)
Article
Energy & Fuels
Yulia F. Chirkova, Andrey S. Stoporev, Roman S. Pavelyev, Mikhail A. Varfolomeev
Summary: In recent years, interest in gas hydrates has grown due to their potential as an energy source and environmentally friendly alternative to storing and transporting natural gas. This study compared the effectiveness of sulfonated castor oil (SCO) and sodium dodecyl sulfate (SDS) as promoting reagents in the formation and decomposition of methane and methane-propane hydrates in a porous medium. The results showed that SCO significantly improved the water conversion rate in methane hydrates due to enhanced mass transfer in the presence of surfactants, while the effect on methane-propane hydrates was limited. Both SCO and SDS accelerated hydrate formation, but SCO required less supercooling. These findings suggest that SCO is comparable to SDS in promoting activity in porous media with varying water saturation.
Article
Nanoscience & Nanotechnology
Yang Zhao, Mingzhao Yang, Man Li, Hongsheng Dong, Yang Ge, Qingping Li, Lunxiang Zhang, Yu Liu, Lei Yang, Yongchen Song, Jiafei Zhao
Summary: Efficient gas enrichment methods are crucial for the storage, transportation, and sequestration of clean energy and carbon dioxide. A novel recyclable hydrate promoter has been developed, which effectively reduces the induction time of methane hydrate formation, increases gas storage capacity, and inhibits foam during hydrate decomposition. Additionally, this promoter enhances CO2 storage capacity and shows potential for sequestering CO2 in the form of gas hydrate under the seafloor.
ACS APPLIED MATERIALS & INTERFACES
(2022)
Review
Biochemistry & Molecular Biology
Yu Wei, Nobuo Maeda
Summary: Applications of clathrate hydrate require fast formation kinetics, which has been limited by mass transfer and heat transfer. Surfactants and mechanical stirring have been used to accelerate hydrate formation but have drawbacks. Dry water, a water-in-air dispersion stabilized by hydrophobic nanosilica, is an effective promoter for hydrate formation. It shifts the hydrate phase boundary, increases formation rate and improves gas storage capacity. Reusability and knowledge gaps in dry water research are highlighted.
Article
Energy & Fuels
Ye Zhang, Gaurav Bhattacharjee, Mohana Dharshini Vijayakumar, Praveen Linga
Summary: Gas storage technologies are important for energy security and resilience. The use of clathrate hydrates, specifically Solidified Natural Gas (SNG), for natural gas storage is attractive due to its non-explosive nature and high volume density. Recent research has shown that the additive 1,3-dioxolane (DIOX) can improve the thermodynamic and kinetic performance of hydrate formation.
Article
Energy & Fuels
Huiru Sun, Bingbing Chen, Ziming Yang, Yongchen Song, Mingjun Yang
Summary: This study focused on the effects of hydrate saturation change and multiphase flow on NGHs production behaviors at different exploitation stages. The results showed that initial hydrate saturation and water-gas flowrate were negatively correlated with the onset time of blockage and amount of hydrate reformation.
Article
Engineering, Chemical
Lingjie Sun, Huilian Sun, Tian Wang, Hongsheng Dong, Lunxiang Zhang, Lei Yang, Jiafei Zhao, Yongchen Song
Summary: This study observed the formation behavior of hydrates in quartz glass beads using a nuclear magnetic resonance system, and found that not all molecules capable of forming hydrates exhibited water absorption effects. The interfacial tension between hydrates and bound water was the driving force for water migration, and larger particle sand facilitated water migration while low initial water saturation inhibited it.
Article
Chemistry, Physical
Changrui Shi, Fengyuan Chai, Mingjun Yang, Yongchen Song, Fuqiang Wang, Hang Zhou, Zheng Ling
Summary: By confining water and sodium dodecyl sulfate solutions in black fungus, the formation kinetics of gas hydrates can be significantly improved and foam problems can be eliminated, making it more efficient for storing and transporting natural gas in the form of hydrates.
JOURNAL OF MOLECULAR LIQUIDS
(2021)
Article
Engineering, Chemical
Xiaofei Qin, Sen Lei, Xubin Zhang, Chen Cao, Feng Xin, Honglin Chen, Xiaoming Zhang, Yachen Yin, Guilian Wu
Summary: This study presents a cost-effective and efficient synthetic route for the production of PODEn, and develops reaction rate laws including PODEn, demonstrating the significant impact of catalyst content on reaction rate. This work is valuable for process optimization and reactor design.
CHINESE JOURNAL OF CHEMICAL ENGINEERING
(2021)
Article
Engineering, Chemical
Yachen Yin, Wenbin Chen, Guilian Wu, Feng Xin, Kang Qin, Yutao Lu, Le Zhang, Mingfeng Li
Summary: In the process of ultra-deep hydrodesulfurization of diesel, two lumped kinetic models and a four-lump kinetic model of aromatic hydrosaturation are proposed. The study found that thermodynamics play a crucial role in UHDS, and also revealed the temperature dependence of organonitrogen inhibition on HDS.
Article
Chemistry, Multidisciplinary
Muhammad Zeshan Azam, Feng Xin
Summary: In this study, a phase change heat removal method using ice granules surrounded by normal alkanes as a coolant and nucleation center was applied to enhance carbon dioxide capture through hydrate formation. The results showed a significantly increased hydrate growth rate and gas uptake compared to previous investigations, demonstrating the potential of using normal alkanes for improving gas-water contact and hydration kinetics in HBCC processes.
Article
Chemistry, Multidisciplinary
Yujie Wei, Can Zhao, Yue Jiang, Xiaohong Yin, Feng Xin, Hassan Ahmed Ibrahim, Olivier Habimana, Junzheng Wang
Summary: A facile method for preparing amphiphilic Janus silica nanospheres using layered double hydroxide as a protective support was reported. The Janus silica nanospheres with a hydrophobic modified surface can act as a novel colloidal surfactant to stabilize Pickering emulsion for at least 2 months.
Article
Chemistry, Physical
Qian Fu, Feng Xin, Xiaohong Yin, Yuexiao Song, Yongsheng Xu
Summary: The liquid phase catalytic exchange of hydrogen isotopes using Pt/modified carbon nitride catalysts shows excellent catalytic performance and stability compared to Pt/activated carbon catalysts, making it a promising process for upgrading recycle water in nuclear power stations.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2021)
Article
Nanoscience & Nanotechnology
Yongsheng Xu, Feng Xin, Yue Jiang, Xiaohong Yin
Summary: A dual-modified graphene with Pt loading was designed for the catalytic exchange of hydrogen isotopes, showing higher efficiency and stability compared to singly-modified graphene. The dual-modified strategy achieved high efficiency and stability for heavy water dedeuteration.
ACS APPLIED MATERIALS & INTERFACES
(2021)
Article
Engineering, Chemical
Chen Cao, Guilin Liu, Feng Xin, Qian Lei, Xiaofei Qin, Yachen Yin, Honglin Chen, Atta Ullah
Summary: Research indicates that reducing the amount of water can increase the yield of PODEn and reduce the occurrence of side reactions.
CHEMICAL ENGINEERING SCIENCE
(2022)
Article
Engineering, Chemical
Guilin Liu, Feng Xin, Chen Cao, Xubin Zhang, Qian Lei, Honglin Chen, Hailun Ren
Summary: Poly(oxymethylene) dimethyl ethers (PODEn=3-5) were synthesized under the catalysis of zeolite BETA and kinetically studied. The research showed that the maximal selectivity of TOX to PODE3-5 was achieved under anhydrous conditions.
CHEMICAL ENGINEERING SCIENCE
(2022)
Article
Engineering, Chemical
Menghan Chu, Feng Xin, Sizhen Zhang, Yongsheng Xu, Zhenxing Zhu
Summary: This paper investigates the liquid alkylation of isobutane and 2-butene in zeolite catalysts. The researchers optimize the catalyst shape in fixed beds to reduce the internal diffusion influences. Their findings show that trilobe-shaped catalyst beds have the highest 2-butene conversion rate under the same volumetric space velocity. Additionally, the conversion rate is highest for ring-shaped catalysts under the same weight hourly space velocity. Increasing the catalyst porosity improves the 2-butene conversion rate.
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
(2022)
Article
Thermodynamics
Umair Aziz, Muhammad Nadeem, Feng Xin, Mustafa Kilic, Atta Ullah
Summary: In this study, the slug flow in a superhydrophobic microchannel was computationally investigated. The results showed that the slug flow performed much better in terms of heat transfer enhancement compared to single-phase flows.
NANOSCALE AND MICROSCALE THERMOPHYSICAL ENGINEERING
(2022)
Article
Chemistry, Multidisciplinary
Yong Wang, Lei Ren, Zifeng Li, Feng Xin
Summary: Hollow niobium oxide nanospheres were successfully synthesized using three-dimensional mesoporous carbon as a hard template, and they exhibited high catalytic activity in oxidative desulfurization.
Article
Chemistry, Multidisciplinary
Yan Liu, Feng Xin, Yongsheng Xu, Zhihao Ding, Bingbing Li
Summary: A novel flat catalyst coating with fully exposed platinum (Pt) active sites was designed using superhydrophobic coating and ion sputtering technique. The optimized catalyst coating showed high catalytic exchange efficiency and good stability at low temperature. This study provides a new idea for the preparation of hydrophobic catalysts.
Review
Engineering, Chemical
Jia Ren, Feng Xin, Yongsheng Xu
Summary: This article reviews the synthesis of polyoxymethylene dimethyl ethers and compares different synthetic routes. It discusses the challenges and opportunities of each route and provides suggestions for catalyst design based on reaction mechanism and catalytic performance.
CHINESE JOURNAL OF CHEMICAL ENGINEERING
(2022)
Article
Nanoscience & Nanotechnology
Yongsheng Xu, Feng Xin, Xiaohong Yin
Summary: By encapsulating platinum active sites in a hydrophilic metal-organic framework Pt@NH2-UiO-66, efficient catalytic exchange of hydrogen isotopes through liquid-phase catalytic exchange (LPCE) technology is achieved. The presence of hydrophilic amino groups accelerates the internal diffusion of water molecules and decreases the catalytic reaction and desorption barrier, resulting in a high turnover frequency.
ACS APPLIED MATERIALS & INTERFACES
(2023)
Article
Engineering, Chemical
Juan Hao, Peixi Feng, Feng Xin, Zhiping Wang, Zhenhuan Zhou, Di Bao, Zhenxing Zhu
Summary: In this study, experiments were conducted to investigate the kinetics of C8 aromatic isomerization over Pt/HZSM-5 catalyst. The rate laws for isomerization, disproportionation, and deethyla-tion reactions were obtained under various operating conditions. A detailed kinetic model was developed based on the experimental data, and the kinetic parameters were estimated using genetic algorithm and least square method. The kinetic model was validated by fitting the experimental data and showed good predictability for the reaction trends of different xylene isomers and industrial feeds, providing support for reactor design and operation.
CHEMICAL ENGINEERING SCIENCE
(2023)
Article
Engineering, Chemical
Xu Yang, Jieshi Xiao, Jian Huang, Kaixiang Peng
Summary: This study introduces an online convolutional adversarial autoencoder (AAE) model to learn representative industrial process information. By extracting features that reflect diverse information and follow a Gaussian distribution, the model improves the accuracy of fault detection and removes redundant information through a feature selection strategy.
JOURNAL OF THE TAIWAN INSTITUTE OF CHEMICAL ENGINEERS
(2024)
Article
Engineering, Chemical
Shao-Yang Wu, Meng-Tsun Lai, Chung-Hui Hsu, Kevin C. W. Wu, Yesong Gu
Summary: This study investigated the effectiveness of using Fe-based MOF or MIL-100(Fe) in conjunction with a PEDOT-modified Pt electrode for detecting the synthetic azo dye tartrazine. By modifying the electrode with two different methods, favorable lower reductive potentials, competitive sensitivities, and good repeatability and stability were achieved in all MIL-100(Fe)/PEDOT/Pt electrodes.
JOURNAL OF THE TAIWAN INSTITUTE OF CHEMICAL ENGINEERS
(2024)
