关键词: 气体水合物, 生成强化, 表面活性剂, 氨基酸

Abstract: Hydrate-based carbon sequestration in deep ocean is a highly promising way for carbon sequestration. The formation of carbon dioxide hydrate is the basis of hydrate-based carbon sequestration. However, the formation rate of gas hydrate is very slow without human intervention. Among the methods that intensify gas hydrate formation, the use of kinetic promoters has been proven to be the most effective one. Though the kinetic promoters have been extensively and deeply studied, they are mainly used for intensifying the formation of light hydrocarbons hydrates, which is the basis of hydrate-based industrial technologies, such as hydrate-based gas storage and gas separation. However, the kinetic promoters that is suitable for the formation of light hydrocarbons hydrates are not necessarily suitable for the formation of carbon dioxide hydrate. Therefore, in order to find out the most effective kinetic promoters to intensify the formation of carbon dioxide hydrate, it is necessary to distinguish the kinetic promoters of carbon dioxide hydrate from that of light hydrocarbon hydrates. Aiming at the intensification of the formation of carbon dioxide gas hydrate, the evolution and the current research status of kinetic promoters are reviewed. The effects of different kinetic promoters on the formation of the same gas hydrate, and the effects of the same kinetic promoter on the formation of above two kinds of gas hydrates are compared. The different effects of kinetic promoters on promoting light hydrocarbons hydrates and carbon dioxide hydrate are revealed. Based on the research status of the kinetic promoters, the study of the intensification mechanisms of the kinetic promoters on different gas hydrates, the establishment of the criteria for assessing the kinetic promoters, the enhancement of the removal of the formation heat of gas hydrates, and the further improvement on intensifying gas hydrate formation are proposed, to provide new methods for the practical application of hydrate-based carbon sequestration.

Key words: gas hydrates, formation intensification, surfactants, amino acids