Experimental Studies on Techniques to Extract Natural Gas Hydrate

Liu, Changling; Sun, Jianye; Ye, Yuguang

doi:10.1007/978-3-642-31101-7_11

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2023

2024

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Cited by 2 publications

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“…The hydrate crystals had three main structures: sI, sII and sH [39]. Cubic structure I contains small (0.4-0.55 nm) guests; cubic structure II generally occurs with larger (0.6-0.7 nm) guests; and hexagonal structure H may occur only with mixtures of both small and large (0.8-0.9 nm) molecules [40].…”

Section: X-ray Diffractionmentioning

confidence: 99%

Principle and Feasibility Study of Proposed Hydrate-Based Cyclopentane Purification Technology

Sun

Yuan

et al. 2023

Energies

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The separation of azeotropic mixtures has conventionally been one of the most challenging tasks in industrial processes due to the fact that components in the mixture will undergo gas–liquid phase transition at the same time. We proposed a method for separating azeotropes using hydrate formation as a solid–liquid phase transition. The feasibility of hydrate-based separation is determined by analyzing the crystal structure and chemical bonds of hydrate. Taking the azeotrope cyclopentane and neohexane in petroleum as an example, cyclopentane (95%) was purified to 98.56% yield using the proposed hydrate-based cyclopentane purification technology. However, this is difficult to achieve using conventional distillation methods. The proposed method is simple in operation and yields a good separation effect. This study provides a new method for separating cyclopentane and neohexane.

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Section: X-ray Diffractionmentioning

confidence: 99%