Article
Thermodynamics
Huan-Ran Zhang, Zhi-Gao Sun
Summary: The formation of CO2 hydrate requires strict conditions, but the equilibrium conditions can be improved by using 2,5-dihydrofuran as a thermodynamic promoter.
JOURNAL OF CHEMICAL AND ENGINEERING DATA
(2023)
Article
Chemistry, Multidisciplinary
Sakura Azuma, Jin Shimada, Katsuhiko Tsunashima, Takeshi Sugahara, Takayuki Hirai
Summary: In this study, a novel type of ionic clathrate hydrate with high equilibrium temperature and dissociation enthalpy was developed for thermal storage applications.
NEW JOURNAL OF CHEMISTRY
(2022)
Article
Thermodynamics
Lingli Shi, Yong He, Jingsheng Lu, Deqing Liang
Summary: Mixed TBAC + TBPC was found to have a higher stabilization effect on CH4 hydrate, significantly enhancing the stability and stored energy of the hydrate. The dissociation enthalpies of the mixed hydrate were also calculated, showing a higher range compared to pure CH4 hydrate.
JOURNAL OF CHEMICAL AND ENGINEERING DATA
(2021)
Article
Chemistry, Analytical
Yuiko Tasaki-Handa, Atsuto Iwashita, Masami Shibukawa, Shingo Saito
Summary: A new liquid chromatography system using tetrabutylammonium bromide semiclathrate hydrate as the column-packing material was proposed to study the adsorption mechanisms of polar small molecules. The results showed that hydrophilic molecules were more strongly retained, and the retentions of aromatics and crown ethers were controlled differently. This approach provides valuable information for understanding the adsorption mechanisms of clathrate hydrate agglomeration inhibitors.
ANALYTICAL SCIENCES
(2022)
Article
Energy & Fuels
Liang-Meng Wu, Xi-Yue Li, Feng-Mei Xie, Dong-Liang Zhong, Peter Englezos, Jin Yan
Summary: This study presents a review of kinetic studies on the enhancement of hydrate-based CO2 capture using additives, porous media, nanofluids, etc. Future research directions are also discussed. The aim of this review is to aid understanding of the mechanism of the hydrate-based CO2 capture process and provide references for its industrial applications in the near future.
Article
Thermodynamics
Taro Iwai, Shuhei Takamura, Atsushi Hotta, Ryo Ohmura
Summary: This study investigates tetrabutylammonium acetate hydrates and tetrabutylammonium hydroxide hydrates as thermal energy storage media for air conditioning and cooling lithium-ion batteries. The dissociation heats of these hydrates were measured and compared with those of other ionic semiclathrate hydrates, showing promising thermophysical properties. Tetrabutylammonium acetate hydrates and tetrabutylammonium hydroxide hydrates are suitable for thermal energy storage in air conditioning and cooling lithium-ion batteries, respectively.
INTERNATIONAL JOURNAL OF THERMOPHYSICS
(2023)
Article
Chemistry, Physical
Parisa Naeiji, Tom K. Woo, Ryo Ohmura, Saman Alavi
Summary: This study investigated the interfacial behavior of tetrabutylammonium bromide (TBAB) aqueous solutions under different conditions. The results showed that TBAB solutions have lower interfacial tension and higher gas adsorption at the interface, which facilitate the formation of semiclathrate hydrates. CO2 exhibits preferential adsorption compared to CH4 due to stronger interactions in the solution. The increased adsorption of CH4 at the solution surface is attributed to the hydrophobic interactions between the TBAB cation and methane gas.
JOURNAL OF CHEMICAL PHYSICS
(2022)
Article
Energy & Fuels
Qian Xue, Faping Liu, Zunzhao Li, Xiaolin Wang, Xiaozhe Sun, Mingrui Liu, Peixian Wang, Shuanshi Fan, Xuemei Lang
Summary: In this study, a 15 L pilot-scale reactor was designed to achieve pilot-scale biogas separation using a novel jet impingement stream. By multistage separation, methane recovery and carbon dioxide capture were achieved, obtaining pure methane. The results showed that the methane concentration could be increased from 50.0% to about 95.1% through a four-stage hydrate-based gas separation process. This work provides insights for the industrial application of continuous hydrate-based biogas separation.
Article
Thermodynamics
Feng-Mei Xie, Xi-Yue Li, Dong-Liang Zhong, Peter Englezos, Guo-Xiang Lu
Summary: This study demonstrates the phase behavior of TBPB and CO2 hydrates at different concentrations, with the addition of surfactant affecting phase equilibrium and CO2 consumption during formation. Further research should focus on increasing the CO2 storage capacity of TBPB semiclathrate hydrate.
JOURNAL OF CHEMICAL AND ENGINEERING DATA
(2021)
Article
Chemistry, Multidisciplinary
Lanyun Wang, Yu Chen, Yongliang Xu, Yajuan Zhang, Yao Li, Yan Wang, Jianping Wei, Tingxiang Chu
Summary: The effects of ionic liquids (ILs) on CO2 hydrates were studied, and it was found that all five ILs could increase CO2 consumption and enhance water to hydrate conversion. [P2 4 4 4][PF6] and [P6 4 4 4][PF6] promoted CO2 hydrate nucleation, resulting in a slightly higher temperature for phase equilibrium and reduced induction times. On the other hand, [N2 2 2 2]Br, [N2 2 2 2][NTf2], and [N2 2 2 2][PF6] slowed down CO2 hydrate nucleation, leading to a lower temperature for phase equilibrium and prolonged induction times.
Article
Engineering, Chemical
Jin Shimada, Masami Shimada, Takeshi Sugahara, Katsuhiko Tsunashima, Yuta Takaoka, Atsushi Tani
Summary: This study investigated the impact of cation size and shape on the thermodynamic properties of semiclathrate hydrates, finding that branched alkyl groups raised the equilibrium temperature while shorter alkyl groups lowered it. Among the orthorhombic systems studied, semiclathrate hydrates with higher equilibrium temperatures had larger dissociation enthalpies.
CHEMICAL ENGINEERING SCIENCE
(2021)
Article
Chemistry, Physical
Xue-Ping Zhang, You-Quan Liu, Qiu-Hao Chang, Rong Zeng
Summary: Oil gas field brine in Sichuan Basin is a significant liquid mineral resource, and its development and utilization are of great importance to the national economy. This study investigated the physicochemical properties and phase diagrams of the ternary systems LiCl-LiBr-H2O and LiCl-LiBr-CH3OH, providing theoretical guidance for the comprehensive utilization of brine through experimental and simulation approaches.
JOURNAL OF MOLECULAR LIQUIDS
(2022)
Article
Chemistry, Physical
Sanehiro Muromachi, Masato Kida, Masato Morimoto, Shogo Yamane, Satoshi Takeya
Summary: This paper investigates the manipulation of the structure and properties of semiclathrate hydrates. By adjusting the alkyl side chain length of quaternary ammonium salts, the structure and relevant properties of the hydrates can be modified.
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2022)
Article
Chemistry, Physical
Patrycja Makos-Chelstowska, Renata Chroma, Vasil Andruch
Summary: Recent research has shown that there are multiple types of hydrogen bond interactions in deep eutectic solvents (DES) and DES-water mixtures, which are crucial for the formation of DES. In addition, van der Waals interactions also play a role in stabilizing DES structures and lowering their melting points. However, excessive water can disrupt the most important hydrogen bonds in DES, leading to structural destruction.
JOURNAL OF MOLECULAR LIQUIDS
(2021)
Article
Chemistry, Multidisciplinary
Sirisha Nallakukkala, Hani Abulkhair, Abdulmohsen Alsaiari, Iqbal Ahmad, Eydhah Almatrafi, Omar Bamaga, Bhajan Lal, Azmi Mohd Shariff
Summary: This study analyzed the suitability of methane, carbon dioxide, and propane for hydrate formation, and concluded that CO2-C3H8 is the preferred hydrate former for hydrate-based desalination.