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Measurements for the Dissociation Condition of Carbon Dioxide Hydrate with each Additive of Cyclopentanol, Cyclohexanol, Cycloheptanol, Cyclohexanone, or Cycloheptanone
Journal of Chemical & Engineering Data ( IF 2.0 ) Pub Date : 2023-07-20 , DOI: 10.1021/acs.jced.3c00190
Salal Hasan Khudaida, Po-Yi Lin, Chie-Shaan Su

In this study, the equilibrium conditions for the dissociation of carbon dioxide hydrate in the presence of various additives were examined. To provide new experimental data and discuss the additive effect of cyclic ketones and cyclic alcohols, the equilibrium dissociation temperatures and pressures for carbon dioxide hydrates with the additive of cyclopentanol, cyclohexnol, cycloheptanol, cyclohexanone, or cycloheptanone were measured by an isochoric method. The experimental data were taken at a pressure range of 1.7 to 3.5 MPa and a concentration of 5 wt %. The Clausius–Clapeyron equation was used to speculate the structure of carbon dioxide hydrate with these additives. It was found that the additives of cyclohexanone and cycloheptanone had an inhibitory effect on the formation of carbon dioxide hydrates with the sI structure. Cycloheptanol had a slight inhibitory effect on the formation of carbon dioxide hydrates at lower temperatures, but this effect disappeared at higher temperatures, and this additive also belongs to the sI structure. The addition of cyclopentanol and cyclohexnol additives showed a promotion effect in a low-pressure region on the formation of carbon dioxide hydrates, and the sII hydrate can be produced when adding these two additives.

中文翻译:

二氧化碳水合物与环戊醇、环己醇、环庚醇、环己酮或环庚酮各添加剂的解离条件的测量

在这项研究中,研究了在各种添加剂存在下二氧化碳水合物解离的平衡条件。为了提供新的实验数据并讨论环酮和环醇的加合效应,采用等容法测定了添加环戊醇、环己醇、环庚醇、环己酮或环庚酮的二氧化碳水合物的平衡解离温度和压力。实验数据是在1.7至3.5 MPa的压力范围和5 wt%的浓度下获得的。克劳修斯-克拉佩龙方程用于推测含有这些添加剂的二氧化碳水合物的结构。结果发现,环己酮和环庚酮添加剂对sI结构二氧化碳水合物的形成有抑制作用。环庚醇在较低温度下对二氧化碳水合物的形成有轻微的抑制作用,但在较高温度下这种作用消失,而且这种添加剂也属于sI结构。环戊醇和环己醇添加剂的添加在低压区域对二氧化碳水合物的形成表现出促进作用,添加这两种添加剂可以生成sII水合物。
更新日期:2023-07-20
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