A5078501610- Methane Hydrates and Related Phenomena
- CO2 Sequestration and Geologic Interactions
- Hydrocarbon exploration and reservoir analysis
- Spacecraft and Cryogenic Technologies
- Carbon Dioxide Capture Technologies
- Atmospheric and Environmental Gas Dynamics
- Astro and Planetary Science
- Inorganic Fluorides and Related Compounds
- Quantum, superfluid, helium dynamics
State Key Laboratory of Hydrology-Water Resources and Hydraulic Engineering
2020-2025
Chinese Academy of Sciences
2016-2025
Guangzhou Institute of Energy Conversion
2016-2025
Guangdong Academy of Sciences
2024
University of Science and Technology of China
2023-2024
Guangdong Research Institute of Water Resources and Hydropower
2020
University of Chinese Academy of Sciences
2010
South China University of Technology
2009
Developing a rapid nondestructive measurement of gas-storage density in the hydrate phase has long been difficulty resource assessment and application. In this work, characteristic peaks CH4, N2, CO2 from Raman spectra were correlated with gas concentrations phase. Water band was chosen as reference peak to normalize Results showed that shape water sI ranging 2800 3600 cm–1 not found have noticeable change, which could be viewed peak. The then normalized by dividing integral intensities...
The rapid development of the natural gas hydrate industry has put forward higher requirements for promotion technology. exploration methods that can simultaneously enhance both formation rate and final water conversion efficiency become a critical research focus. This study systematically investigated synergistic effects electric field (EF) signals, including three distinct waveforms (square, sine, ramp wave) at six different voltage levels, combined with four concentration gradients...
The dissociation behaviors of propane hydrate by high concentration alcohols inhibitors injection were investigated. Methanol (30.0, 60.1, 80.2, and 99.5 wt %) ethylene glycol 69.8, solution injected, respectively, as in 3.5 L transparent reactor. It is shown that the average rates injecting methanol are 0.02059−0.04535 0.0302−0.0606 mol·min−1·L−1, respectively. increase with mass solution, it biggest when % was injected. presence accelerates gas reduces total need external energy to...
Abstract To reveal the kinetic performance of gas molecules in hydrate growth, formation from pure CO 2 , flue gas, and biogas was measured using in-situ Raman macroscopic methods at 271.6 K. In measurements, peaks gases phase were characterised normalised by taking water bands 2800 to 3800 cm −1 as a reference, whose line shapes not found have noticeable change conversion Ih ice sI hydrate. The growth suggested start with unsaturated nuclei followed adsorption. formed all tested gases,...
Hydrate-based gas separation(HBGS) technology based on tetra-n-butyl ammonium bromide (TBAB) semiclathrare hydrate can be utilized in CO2 separation from biogas. The phase equilibria of semiclathrate hydrates are crucial for the successful industrial application HBGS technology. In this work, equilibrium data TBAB with a synthesized binary CO2/CH4 mixed (0.5 and 0.5 CH4 mole fraction) were reported at five different concentrations (0.001, 0.01, 0.05, 0.1, 0.2 mass fraction). experiments...
To enhance the energy efficiency of biogas and reduce environmental pollution, impurities such as CO2 N2 must be removed. In this context, hydrate-based gas separation (HBGS) is a novel technology that has been utilized in purification. As such, hydrate phase equilibrium data CH4/CO2/N2 mixture are crucial for application HBGS process separation. This study presents our investigation into conditions hydrates synthesized ternary mixtures. All experiments were conducted at 276.2–286.3 K...
The variations in the equilibrium conditions of hydrate phase between different gas components can be employed for separation. use hydrate-based separation technologies CH4 recovery from biogas has gained prominence. In this study, formation a ternary mixture with CH4, CO2, and N2 was studied. amount consumed rate were calculated using pressure temperature during reaction. Gas composition changes, factor, CO2 split ratio key parameters considered to evaluate technical feasibility HBGS....
The formation and decomposition of gas hydrates in nanoscale sediments can simulate the accumulation mining process hydrates. This paper investigates Raman spectra water confined inside pores silica gel, characterizations methane hydrate that formed from pore water, intrinsic relationship between them. results show has stronger hydrogen bonds molecules at both 293 K 223 K. structure is conducive to nucleation hydrate. Below 273.15 K, was investigated atmospheric pressure a constant volume...
Semi‐clathrate hydrates of tetra‐ n ‐butyl ammonium bromide (TBAB) offer a potential solution for separation CO 2 from biogas. In this work, gas hydrate formation /CH 4 mixture in distilled water with 0.05 g/g (5 wt%) TBAB was examined at 275, 277, and 279 K pressures 4000, 5000, 6000 kPa. The compositional changes the phase were analyzed continuously during process. results indicated that no significant induction occurred formation. factor increased decreasing temperature increasing...
Hydrate formation from cyclopentane (CP) and carbon dioxide was measured at 281 K by powder X-ray diffraction (PXRD) macroscopic methods. The effect of initial pressure CP mass fraction in liquid phase analyzed. results showed that hydrate assumed to start with the nucleation mixed CP-CO2 small CO2 followed a large continuous adsorption. Initial found have positive correlation total consumptions when below 2.5 MPa. However, dropped over half as 3.0 PXRD revealed all samples formed different...
Hydrate-based gas separation (HBGS) technology can effectively separate CH4 and CO2 in multicomponent gases. To provide the necessary basic data for HBGS technology, hydrate phase equilibrium conditions of a ternary mixture (CH4/CO2/N2 = 0.5/0.4/0.1) were determined compared tetrabutylammonium bromide (TBAB) aqueous solutions with different mass fractions (0.05, 0.1, 0.2, 0.4). The results indicated that all four concentrations TBAB solution could shift to higher temperatures lower...