本研究改造前期建立的一套具有可視窗高壓設備（高壓釜內部
體積約為1.6 L）以探討二氧化碳置換甲烷水合物過程的動態變化行
為。本研究實驗包含在海水系統中填充不同之填充物條件下，二氧
化碳水合物生成與兩階段減壓融解過程之動態行為探討，其操作溫
度介於275 K ~ 279 K 之間。此外，我們也探討在高壓釜中（純水+
甲烷）灌注二氧化碳，對甲烷水合物融解與被二氧化碳置換之動態
行為，在實驗過程中全程紀錄各時間點，高壓釜內溫度與壓力分佈
的變化、釋放氣體中之二氧化碳與甲烷的組成分析，以及釋放氣體
的總體積等資料。這些實驗數據提供了珍貴的實驗證據，使我們對
灌注二氧化碳置換甲烷水合物的機制更加瞭解。

A visual high-pressure apparatus, with internal volume of 1.6 L, was modified in the present study to investigate the dynamic behavior of methane hydrate replacement by carbon dioxide injection. The experimental works include the investigation of the dynamic behavior of carbon dioxide hydrate formation and decomposition in seawater and different types of packings by two-stage depressurization process. The operating temperatures are from 275 K to 279 K. We also injected carbon dioxide into high-pressure cell (pure water + methane) to observe the dynamic behavior of methane hydrate decomposition and replacement by carbon dioxide injection. The temperature responses at different positions, pressure in the high-pressure cell, released gas composition analysis, and total volume of released gas varying with time were collected during the experimental course. Those data provide us valuable experimental evidences to get more insight into the mechanism of methane hydrate replacement by carbon dioxide injection.

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