摘要
为研究超临界二氧化碳(SC-CO_2)在双基球扁药中的溶解性能,采用静态法并依据Fick扩散定律分析了SC-CO_2在不同弧厚球扁药中的溶解量和扩散系数,并研究了共溶剂对溶解量和扩散系数的影响。结果表明:SC-CO_2在球扁药中的溶解量随着饱和时间的增加而增大,8 h后趋于稳定,达到16%;溶解量随着饱和压力的升高而增大;溶解量随着饱和温度的升高而减小,在40℃时有较高的溶解量;共溶剂的加入对SC-CO_2溶解量增大有促进作用,溶解量可达到22. 6%;球扁药弧厚对SC-CO_2的饱和溶解量基本没有影响;在常温和常压环境条件下的解吸附扩散系数远大于在超临界条件下的吸附扩散系数;在不添加共溶剂条件下,SC-CO_2饱和溶解量可达到16%;加入共溶剂后,SC-CO_2饱和溶解量可达到22. 6%,提高了41. 3%.通过调节工艺参数与加入共溶剂可有效增加SC-CO_2在球扁药中的溶解量,为微孔球扁药的制备提供了参考。
In order to study the solubility of SC-CO 2 in double-base propellant,the dissolution and diffusion coefficients of SC-CO 2 in oblate spherical propellants with different arc thicknesses are investigated by the static method and the Fick diffusion law,and the effect of co-solvent on the amount of dissolution and diffusion coefficient is studied.The results show that the dissolved amount of SC-CO 2 in the double-base oblate spherical propellant increases with the increase in saturation time and is stabilized after 8 h,reaching 16%.It increases with the increase in saturation pressure.However,the dissolved amount of SC-CO 2 decreases with the increase in saturation temperature,and the dissolved amount is higher at 40℃.The addition of co-solvent has a positive effect on the increase in dissolved amount of SC-CO 2,and the dissolved amount is increased to 22.6%.The thickness of oblate spherical propellants has no effect on the saturated dissolved amount of SC-CO 2.The desorption diffusion coefficient under ambient conditions is much larger than the adsorption coefficient under supercritical conditions.The saturated dissolved amount of SC-CO 2 reaches 16%without adding co-solvent.After adding co-solvent,the saturated dissolved amount of SC-CO 2 reaches at least 22.6%,which is increased by 41.3%.The dissolution of SC-CO 2 in oblate spherical propellants can be increased effectively by adjusting the process parameters and adding the co-solvents.
作者
吴文龙
丁亚军
应三九
WU Wen-long;DING Ya-jun;YING San-jiu(School of Chemical Engineering,Nanjing University of Science and Technology,Nanjing 210094,Jiangsu,China)
出处
《兵工学报》
EI
CAS
CSCD
北大核心
2018年第10期1965-1970,共6页
Acta Armamentarii
关键词
超临界二氧化碳
双基球扁药
共溶剂
溶解性能
扩散系数
supercritical carbon dioxide
double-base oblate spherical propellant
co-solvent
solubility
diffusion coefficient
