The essential characteristic of CO₂ makes most surfactants futile to form stable CO₂ emulsion. In this work, a green surfactant named alkyl polyglucoside (APG) was applied to prepare liquid CO₂ emulsion. The performance of surfactant on CO₂ emulsion stability was assessed in a sapphire cell by delamination time of emulsion under the operating conditions about 284.5 K and 5.2 MPa. The results demonstrate that APG has a potential to be used in CO₂ emulsion preparation and the suitable dosage of APG is about 3.0 wt% water quality. The phase-inversion point of water-in-CO₂ and CO₂-in-water was determined as ranging from 15 vol% to 17.5 vol% (water cut) after examining the systems at different water cuts with 3.0 wt% APG. Two surfactants, fatty alcohol polyoxyethylene ether (AEO) and sodium bis(2-ethylhexyl) sulfosuccinate (AOT) were also tested. To consider the applicability of CO₂ emulsion in fields such as submarine hydrate exploitation and CO₂ sequestration, the performance of surfactants in saline solution was examined. The experimental results show that APG can be used as surfactant in preparing liquid CO₂ emulsion with or without NaCl. The adding of 1.0 wt% NaCl for CO₂ emulsion with 3.0 wt% APG was proved to change the phase-inversion point to higher water cut. In comparison, anion surfactant AOT was futile in saline solution.

CO ₂的基本特性使大多数表面活性剂徒劳无功，无法形成稳定的CO ₂乳液。在这项工作中，使用一种名为烷基聚葡萄糖苷（APG）的绿色表面活性剂来制备液态CO ₂乳液。通过在约284.5 K和5.2 MPa的操作条件下乳化液的分层时间，评估了蓝宝石电池中表面活性剂对CO ₂乳化液稳定性的性能。结果表明，APG具有用于CO ₂乳液制备的潜力，并且APG的合适剂量为约3.0重量％的水质量。CO ₂和CO _2包水的相变点在使用3.0 wt％的APG在不同含水率下检查系统后，确定水中含水率为15体积％至17.5体积％（含水率）。还测试了两种表面活性剂，脂肪醇聚氧乙烯醚（AEO）和双（2-乙基己基）磺基琥珀酸钠（AOT）。为了考虑CO ₂乳液在海底水合物开采和CO ₂隔离等领域的适用性，研究了盐溶液中表面活性剂的性能。实验结果表明，在有或无NaCl的条件下，APG均可作为表面活性剂用于制备液态CO ₂乳液。添加1.0 wt％的NaCl用于CO ₂事实证明，具有3.0 wt％APG的乳液可将相转化点改变为更高的含水率。相比之下，阴离子表面活性剂AOT在盐溶液中无效。