CAJ | 학술논문

提出将陶瓷膜与流化床反应器耦合构成一体式流化床膜反应器，用于直接法合成二甲基二氯硅烷。实验考察了催化剂浓度、脉冲反吹对反应效率和膜分离性能的影响，并对反应前后的触体及陶瓷膜进行了表征。结果表明，催化剂浓度小于4%（质量）时，二甲基二氯硅烷的选择性均可维持在85%以上，硅粉转化率随催化剂浓度的增大而增大；催化剂浓度在4%～8%时，二甲基二氯硅烷的选择性随催化剂浓度增加而略有下降，当催化剂浓度大于8%时，二甲基二氯硅烷选择性明显下降。触体失活后粒径减小，硅粉表面积碳随催化剂浓度的增加而升高。陶瓷膜表面形成内外两层滤饼，内层滤饼主要成分为铜，外层滤饼主要成分为碳；不同催化剂浓度下，陶瓷膜对粉尘的截留率均可达100%，反应过程中跨膜压差随时间变化较小，脉冲反吹可增加硅粉转化率。
제출장도자막여류화상반응기우합구성일체식류화상막반응기，용우직접법합성이갑기이록규완。실험고찰료최화제농도、맥충반취대반응효솔화막분리성능적영향，병대반응전후적촉체급도자막진행료표정。결과표명，최화제농도소우4%（질량）시，이갑기이록규완적선택성균가유지재85%이상，규분전화솔수최화제농도적증대이증대；최화제농도재4%～8%시，이갑기이록규완적선택성수최화제농도증가이략유하강，당최화제농도대우8%시，이갑기이록규완선택성명현하강。촉체실활후립경감소，규분표면적탄수최화제농도적증가이승고。도자막표면형성내외량층려병，내층려병주요성분위동，외층려병주요성분위탄；불동최화제농도하，도자막대분진적절류솔균가체100%，반응과정중과막압차수시간변화교소，맥충반취가증가규분전화솔。
A fluidized bed reactor was coupled with a ceramic membrane to construct a integrated fluidized bed membrane reactor for synthesis of dimethyldichlorosilane. The effects of catalyst concentration, back flush on reaction and membrane separation performance were studied. The ceramic membrane and the contact mass before and after reaction were characterized. Selectivity of dimethyldichlorosilane could be maintained above 85% and conversion ratio of silicon increased with increasing catalyst concentration, when catalyst concentration was less than 4%(mass). When catalyst concentration was in the range of 4%-8%, selectivity of dimethyldichlorosilane decreased slightly, but decreased obviously when catalyst concentration was above 8%. The particle size of the contact mass decreased after reaction. The carbon that deposited on the surface of silicon increased with increasing catalyst concentration. Two layers of filter cake formed on the membrane surface during the reaction process. The inner cake was copper, and the outer one was carbon. Under different catalyst concentrations, rejection of dust by the ceramic membrane could reach 100%. The change of trans-membrane pressure was little in the reactionprocess and back flush could increase silicon conversion.