Study for utilization of methane/ethane hydrates and immobilization of carbon dioxide under the ocean on global warning

全球警告下的环境问题现在在世界上非常严重。典型的全球警示气体是二氧化碳。在世界上，为了保持舒适的现代生活，每人每天平均产生的二氧化碳约为10公斤。二氧化碳的处理在世界上很重要，含有2-氨基乙醇或环己胺的水溶液对典型的全球变暖气体中的二氧化碳表现出极好的吸收能力。在此过程中，将溶液煮沸，并进一步冷凝除二氧化碳以外的蒸汽，即可回收溶液。在回收过程的设计和操作中，有关溶液需要汽液平衡。本研究在常压下测定了含2-氨基乙醇或环己胺的水溶液的汽液平衡关系，以固定化海底回收的二氧化碳，甲烷/乙烷水合物的物理性质对环境技术的发展具有重要意义。在313.15 K下，利用静态循环装置测量了乙烷+正丁醇体系的高压相平衡和饱和密度。该装置最高温度为400K，最高压力为20 MPa，可测定各相的共存相组成和饱和密度。实验结果包括汽液平衡(VLE)、液液平衡(LLE)和汽液平衡。用气相色谱和密度法分别测定了各相的平衡组成和密度。实验数据与各种状态方程进行了关联。

The environmental problems on global warning are now very severe in the world. The typical global warning gas is carbon dioxide. In the world, the average amount of carbon dioxide produced per one person is approximately 10 kg per day, to keep the comfortable modern life. The treatment of carbon dioxide is important in the world.Aqueous solutions containing 2-aminoethanol or cyclohexylamine show excellent ability for the absorption of carbon dioxide of the typical global warming gas. The solutions can be recovered after boiling the solutions and further condensing the vapor except carbon dioxide in the process. In the design and operation of the recovery process, the vapor-liquid equilibria are required for the solutions concerned. In the present study, vapor-liquid equilibrium relations of the aqueous solutions containing 2-aminoethanol or cyclohexylamine are measured at atmospheric pressure To immobilize recovered carbon dioxide under the ocean, physical properties of methane/ethane hydrates is important to develop environmental technologies.Phase equilibria and saturated densities for ethane + 1-butanol system at high pressures were measures using a static-circulation apparatus at 313.15 K. The experimental apparatus equipped with three Anton Paar DMA 512S vibrating tube density meters was previously developed for measuring vapor-liquid-liquid equilibrium (VLLE) at high pressures. Co-existing phase composition and saturated density of each phase can be measured by means of the apparatus with a maximum temperature and pressure of 400 K and 20 Mpa, respectively. The present experimental results include vapor-liquid equilibria (VLE), liquid-liquid equilibria (LLE), and VLLE. The equilibrium composition and density of each phase were determined by gas chromatography and density measurements, respectively. The experimental data were correlated with various equations of state.