CAJ | 학술논문

渗透汽化是一种新型高效的膜分离技术,尤其在汽油深度脱硫技术方面具有独特优势.以PEI超滤膜为支撑层,PDMS为复合层,制备PDMS/PEI渗透汽化FCC汽油脱硫复合膜.通过傅立叶红外光谱仪(FTIR-ATR)对其进行了结构分析,考察了交联前后官能团的变化.通过扫描电子显微镜(SEM)分析了复合膜表面和断面的形态.在以前的工作基础上,将制备的PDMS/PEI复合膜应用于放大实验,在不同的料液体系中考察膜的渗透汽化性能.结果表明,对于正庚烷/噻吩体系,在80℃下连续操作28 h,料液硫含量从200 ng/μL降到10 ng/μL,其平均通量为0.78 kg/(m2·h),平均富硫因子为7.6.对于汽油加噻吩体系,平均渗透通量为0.06 kg/(m2·h),平均富硫因子为4.8.该成果为膜法汽油脱硫深入研究和工业应用奠定了基础.
삼투기화시일충신형고효적막분리기술,우기재기유심도탈류기술방면구유독특우세.이PEI초려막위지탱층,PDMS위복합층,제비PDMS/PEI삼투기화FCC기유탈류복합막.통과부립협홍외광보의(FTIR-ATR)대기진행료결구분석,고찰료교련전후관능단적변화.통과소묘전자현미경(SEM)분석료복합막표면화단면적형태.재이전적공작기출상,장제비적PDMS/PEI복합막응용우방대실험,재불동적료액체계중고찰막적삼투기화성능.결과표명,대우정경완/새분체계,재80℃하련속조작28 h,료액류함량종200 ng/μL강도10 ng/μL,기평균통량위0.78 kg/(m2·h),평균부류인자위7.6.대우기유가새분체계,평균삼투통량위0.06 kg/(m2·h),평균부류인자위4.8.해성과위막법기유탈류심입연구화공업응용전정료기출.
Pervaporation is one of the most effective membrane separation technologies, especially with the significance and possibility for deep desulphurization of fluid catalytic cracking(FCC)gasoline.In this paper,crosslinked polydimethylsiloxane/polyetherimide(PDMS/PEI)composite membranes were prepared, in which asymmetric PEI membrane prepared with phase inversion method acted as the microporous supporting layer in the flat-plate composite membrane.The different function compositions of the PEG/PEI composite membranes were characterized by reflection FTIR.The surface and section of PDMS/PEI composite membranes were investigated by scanning electron microscope(SEM).Based on our previous studies, the composite membranes prepared in this work were employed in sacle-up process to investigate the pervaporation performance of the membranes in different feed conditions.During the operation of 28 h at 80℃ for n-heptane/thiophene mixtures,the feed total sulfur concentration decreased from 200 ng/μL to 10 ng/μL while average total flux and sulfur enrichment factor was 0.78 kg/(m2·h)and 7.6, respectively.Experiment results also demonstrated that the average total flux and sulfur enrichment factor for gasoline/thiophene mixtures was 0.06 kg/(m2·h)and 4.8, respectively.This work would be a foundational contribution to further investigation on gasoline desulfurization and practical industry application.