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Lanying Yang

Bio: Lanying Yang is an academic researcher from China University of Petroleum. The author has contributed to research in topics: Hydrate & Methane. The author has an hindex of 21, co-authored 92 publications receiving 1797 citations.


Papers
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Journal ArticleDOI
TL;DR: In this paper, the effects of anionic surfactant sodium dodecyl sulfate (SDS) on the formation/dissociation kinetic behaviors of methane hydrate have been studied experimentally, with an emphasis put on dissociation kinetic behavior below ice point.

204 citations

Journal ArticleDOI
01 Apr 2012-Energy
TL;DR: In this article, three groups of hydrate-bearing sediment samples with/without underlying gas were prepared using a three-dimensional middle-size reactor to investigate the favorable conditions for methane recovery from hydrate reservoir with gaseous CO2.

200 citations

Journal ArticleDOI
TL;DR: A novel slurry concept that combines specific advantages of metal-organic frameworks, ion liquids, amines and membranes by suspending zeolitic imidazolate framework-8 in glycol-2-methylimidazole solution is reported, which may give a more efficient technology to capture carbon dioxide compared to conventional technologies.
Abstract: Removal of carbon dioxide is an essential step in many energy-related processes. Here we report a novel slurry concept that combines specific advantages of metal-organic frameworks, ion liquids, amines and membranes by suspending zeolitic imidazolate framework-8 in glycol-2-methylimidazole solution. We show that this approach may give a more efficient technology to capture carbon dioxide compared to conventional technologies. The carbon dioxide sorption capacity of our slurry reaches 1.25 mol l(-1) at 1 bar and the selectivity of carbon dioxide/hydrogen, carbon dioxide/nitrogen and carbon dioxide/methane achieves 951, 394 and 144, respectively. We demonstrate that the slurry can efficiently remove carbon dioxide from gas mixtures at normal pressure/temperature through breakthrough experiments. Most importantly, the sorption enthalpy is only -29 kJ mol(-1), indicating that significantly less energy is required for sorbent regeneration. In addition, from a technological point of view, unlike solid adsorbents slurries can flow and be pumped. This allows us to use a continuous separation process with heat integration.

159 citations

Journal ArticleDOI
TL;DR: In this paper, the dynamics of CH4 replacement in natural gas hydrate with liquid CO2 was studied with a high pressure three-dimensional reactor with five groups of hydrate samples.

149 citations

Journal ArticleDOI
TL;DR: In this article, the interfacial tension of a mixture of methane and water with surfactant near the hydrate formation conditions was measured using the pendant-drop method at 273.2 K and 278.8 K and in the pressure range of (0.4 to 9.5) MPa.
Abstract: Interfacial tension of methane + water with surfactant near the hydrate formation conditions were measured using the pendant-drop method at 273.2 K and 278.8 K and in the pressure range of (0.4 to 9.5) MPa. The concentrations of sodium dodecyl sulfate (SDS) were 100 ppm, 300 ppm, 500 ppm, 700 ppm, and 1000 ppm. It was found that the interfacial tension of the solutions decreases steeply with the addition of SDS. When the SDS concentration is about 500 ppm, the surfactant concentration reaches a critical micellar concentration of the methane + water solution. Surfactant molecules associate as micelles, and the interfacial tension remains constant with further increase in SDS concentration.

103 citations


Cited by
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Journal ArticleDOI
TL;DR: In this article, the authors review various studies on resource potential of natural gas hydrate, the current research progress in laboratory settings, and several recent field trials, and discuss possible limitation in each production method and the challenges to be addressed for large scale production.

1,236 citations

Journal ArticleDOI
TL;DR: This review highlights the advances in the use of MOFs in the elimination (adsorption and/or degradation) of EOCs from water, classifying them by the nature of the contaminant.
Abstract: Water is essential in all aspects of life, being the defining characteristic of our planet and even our body. Regrettably, water pollution is increasingly becoming a challenge due to novel anthropogenic pollutants. Of particular concern are emerging organic contaminants (EOCs), the term used not only to cover newly developed compounds but also compounds newly discovered as contaminants in the environment. Aside from anthropogenic contamination, higher temperature and more extreme and less predictable weather conditions are projected to affect water availability and distribution. Therefore, wastewater treatment has to become a valuable water resource and its reuse is an important issue that must be carried out efficiently. Among the novel technologies considered in water remediation processes, metal-organic frameworks (MOFs) are regarded as promising materials for the elimination of EOCs since they present many properties that commend them in water treatment: large surface area, easy functionalizable cavities, some are stable in water, and synthesized at large scale, etc. This review highlights the advances in the use of MOFs in the elimination (adsorption and/or degradation) of EOCs from water, classifying them by the nature of the contaminant.

542 citations

Journal ArticleDOI
Xiao-Sen Li1, Chun-Gang Xu1, Yu Zhang1, Xu Ke Ruan1, Gang Li1, Yi Wang1 
TL;DR: In this paper, the authors comprehensively review the relevant studies of natural gas hydrates and propose their comments, discuss the limitations and challenges, raise some questions and put forward some suggestions from their points of view.

474 citations

Journal ArticleDOI
TL;DR: In this article, a number of different separation strategies can be employed to achieve the desired desired separation performance using microporous metal-organic frameworks (MOFs), including selective binding with the metal atoms of the framework, exploiting differences in molecular packing efficiencies within the ordered pore structures, utilizing selectivities based on the framework flexibility and gate-opening mechanisms, and molecular sieving.
Abstract: In the process industries, the separation of mixtures of hydrocarbons is important both for the preparation of feedstocks and for use as end products. The constituents, hydrocarbons, are either aliphatic or aromatic, saturated or unsaturated, with a large variation in the number of carbon atoms. Using microporous metal–organic frameworks (MOFs), a number of different separation strategies can be employed to achieve the desired separation performance. The strategies include selective binding with the metal atoms of the framework, exploiting differences in molecular packing efficiencies within the ordered pore structures, utilizing selectivities based on the framework flexibility and gate-opening mechanisms, and molecular sieving. Various strategies are discussed in this article, along with perspectives for future research and development for improving the separation performance.

467 citations

Journal ArticleDOI
TL;DR: In this paper, the interfacial interaction between mineral surfaces and immiscible fluids determines the efficiency of enhanced oil or gas recovery operations as well as our ability to inject and store CO2 in geological formations.
Abstract: [1] The interfacial interaction between mineral surfaces and immiscible fluids determines the efficiency of enhanced oil or gas recovery operations as well as our ability to inject and store CO2 in geological formations Previous studies have shown that the interfacial tension and contact angle in CO2-water-mineral systems change noticeably with fluid pressure We compile previous results and extend the scope of available data to include saline water, different substrates (quartz, calcite, oil-wet quartz, and polytetrafluoroethylene (PTFE)), and a wide pressure range (up to 20 MPa at 298K) Data analysis provides interfacial tension and contact angle as a function of fluid pressure; in addition, we recover the diffusion coefficient of water in liquid CO2 from long-term observations Results show that CO2-water interfacial tension decreases significantly as pressure increases in agreement with previous studies Contact angle varies with CO2 pressure in all experiments in response to changes in CO2-water interfacial tension: it increases on nonwetting surfaces such as PTFE and oil-wet quartz and slightly decreases in water-wet quartz and calcite surfaces Water solubility and its high diffusivity (D = 2 × 10−8 to 2 × 10−7 m2/s) in liquid CO2 govern the evolution of interparticle pendular water CO2-derived ionic species interaction with the substrate leads to surface modification if reactions are favorable, eg, calcite dissolution by carbonic acid and precipitation as water diffuses and migrates into the bulk CO2 Pressure-dependent interfacial tension and contact angle affect injection patterns and breakthrough mechanisms, in other words, the performance of geological formations that act as either reservoirs or seals

410 citations