摘要
针对CO2水合物自然生成速度慢这一技术难题,利用实验室自制的水合物实验系统,开展了十六烷基三甲基溴化铵(CTAB)体系下CO2水合物生成促进实验研究。考察了CTAB质量分数为200、300、500、700、900 mg/kg下对水合反应体系表面张力及CO2水合物生成特性影响规律,分析了CTAB对CO2水合物生成促进作用机理。实验结果表明,5种浓度下CTAB添加剂均能够有效降低CO2水合物相平衡点,温度越高,生成压力降低幅度越大,在最优用量为300 mg/kg下降幅可达27.7%。水合反应体系的压力越低,CTAB促进CO2水合物生成的诱导时间降低越大,促进效果越明显。该研究对于提高水合物生成速率具有一定的意义。
In order to promote and accelerate the formation of CO2 hydrate, the CO2 hydrate formation experiment is performed with cationic surfactant hexadecyl trimethyl ammonium bromide （CTAB） as additive. The effects of the amount of CTAB （200,300,500,700 and 900 mg/kg ） on the interfacial tension and the process of hydrate formation are investigated. The phenomenon and mechanism of CO2 hydrate formation are analyzed. The results show that CTAB can reduce phase equilibrium point of CO2 hydrate. The higher the temperature, the greater pressure reduction. With the optimal amount of CTAB （300 mg/kg）, the pressure reduction for CO2 hydrate can reach the largest decline （27.7 % ）. The induction time of CO2 hydrate in CATB is lower than that in pure water at the same temperature and pressure. The lower pressure of hydration reaction system, the larger induction time of CO2 hydrate reduction. This study has a certain significance to improve the rate of hydrate formation.
出处
《现代化工》
CAS
CSCD
北大核心
2013年第2期60-63,65,共5页
Modern Chemical Industry
基金
国家自然科学基金(51176015)
中国石油科技创新基金项目(2011D50060606)
