CAJ | 학술논문

生物柴油副品油酸的高值化利用是降低生物柴油成本的有效途径之一，为了充分利用生物柴油副品油酸中的壬二酸，用基于超临界流体技术（SCCO2）的固相缩聚方法可制得超高相对分子质量的尼龙69等高分子材料。SCCO2不仅可以作为增强SSP过程的介质使用，还可以有效地将缩聚物（如水等小分子缩聚物）脱除，促进反应的进行，因此测定水在超临界二氧化碳中的溶解度对研究SCCO2增强的SSP过程具有重要意义。文中采用静态法测定了水在超临界二氧化碳中的溶解度，温度为313．15，333．15，353．15，373．15 K，压力为8．0-18．0 MPa，溶解度（摩尔分数）为0．254％-1．414％；探究了温度、压力对溶解度的影响，结果表明：溶解度随温度、压力的升高而升高；利用PR状态方程和Chrastil修正模型对溶解度进行了计算，结果表明溶解度的计算值和实验值吻合良好，平均相对误差分别为4．63％和5．89％。
생물시유부품유산적고치화이용시강저생물시유성본적유효도경지일，위료충분이용생물시유부품유산중적임이산，용기우초림계류체기술（SCCO2）적고상축취방법가제득초고상대분자질량적니룡69등고분자재료。SCCO2불부가이작위증강SSP과정적개질사용，환가이유효지장축취물（여수등소분자축취물）탈제，촉진반응적진행，인차측정수재초림계이양화탄중적용해도대연구SCCO2증강적SSP과정구유중요의의。문중채용정태법측정료수재초림계이양화탄중적용해도，온도위313．15，333．15，353．15，373．15 K，압력위8．0-18．0 MPa，용해도（마이분수）위0．254％-1．414％；탐구료온도、압력대용해도적영향，결과표명：용해도수온도、압력적승고이승고；이용PR상태방정화Chrastil수정모형대용해도진행료계산，결과표명용해도적계산치화실험치문합량호，평균상대오차분별위4．63％화5．89％。
The high value utilization of oleic acid of inferior-quality product is one of the effective ways to reduce the cost of biodiesel,and in order to make full use of azelaic acid of inferior-quality product in biodiesel,solid state polycondensation (SSP)based on supercritical fluid technology can be used for the preparation of polymer materials with ultra-high relative molecular mass,such as nylon 69 .SCCO2 can not only enhance the SSP process as a medium,but also can effectively remove the polycondensate (such as water),and promote the reaction,so the determination of water solubility in SCCO2 for the research of enhanced SSP process by SCCO2 is of great significance.The solubility of water in SCCO2 was measured by the static method at 313.15,333.15,353.15 and 373.15 K and pressures 8.0-18.0 MPa,and the effect of temperature and pressure on the solubility was investigated.The experimental results show that the solubility data range from water mole fraction of 0.254%(313.15 K,8.0 MPa)to 1.414% (373.15 K,18.0 MPa),and the solubility increases with the increasing of temperature and pressure.Moreover,the solubility data were calculated by using Peng-Robinson equation of state as well as the Chrastil modified model.Both calculations demonstrate satisfactory results,with an average absolute relative deviation (AARD)4.63% and 5 .89%,respectively.