江西师范大学学报(自然科学版)
江西師範大學學報(自然科學版)
강서사범대학학보(자연과학판)
JOURNAL OF JIANGXI NORMAL UNIVERSITY(NATURAL SCIENCES EDITION)
2014年
3期
295-299
,共5页
丁民正%张小亮%王刘杰%卢章辉%胡娜%桂田%陈祥树
丁民正%張小亮%王劉傑%盧章輝%鬍娜%桂田%陳祥樹
정민정%장소량%왕류걸%로장휘%호나%계전%진상수
高岭土%硅藻土%方沸石分子筛膜%2次生长法%氢气分离
高嶺土%硅藻土%方沸石分子篩膜%2次生長法%氫氣分離
고령토%규조토%방비석분자사막%2차생장법%경기분리
kaolin%diatomite%analcime zeolite membrane%secondary growth%hydrogen separation
以廉价高岭土和硅藻土为主要原料,在管状莫来石支撑体上采用2次水热生长法合成了方沸石分子筛膜.通过气体渗透性能测试和XRD、SEM等对膜进行表征,重点考察了合成溶胶中的碱度、合成温度、晶化时间对膜层的晶体形貌和结构以及渗透性能的影响.结果表明:在n( H2 O): n( Na2 O)为200的合成溶胶体系中,合成温度为150℃的条件下晶化反应6 h,可制备出结晶度好且渗透性能较高的纯相方沸石分子筛膜.室温下该膜的氢气渗透率为1.8×10-8 mol·m-2·s-1·Pa-1,H2/CO2气体分离因子为15,高于其努森扩散值(4.7).
以廉價高嶺土和硅藻土為主要原料,在管狀莫來石支撐體上採用2次水熱生長法閤成瞭方沸石分子篩膜.通過氣體滲透性能測試和XRD、SEM等對膜進行錶徵,重點攷察瞭閤成溶膠中的堿度、閤成溫度、晶化時間對膜層的晶體形貌和結構以及滲透性能的影響.結果錶明:在n( H2 O): n( Na2 O)為200的閤成溶膠體繫中,閤成溫度為150℃的條件下晶化反應6 h,可製備齣結晶度好且滲透性能較高的純相方沸石分子篩膜.室溫下該膜的氫氣滲透率為1.8×10-8 mol·m-2·s-1·Pa-1,H2/CO2氣體分離因子為15,高于其努森擴散值(4.7).
이렴개고령토화규조토위주요원료,재관상막래석지탱체상채용2차수열생장법합성료방비석분자사막.통과기체삼투성능측시화XRD、SEM등대막진행표정,중점고찰료합성용효중적감도、합성온도、정화시간대막층적정체형모화결구이급삼투성능적영향.결과표명:재n( H2 O): n( Na2 O)위200적합성용효체계중,합성온도위150℃적조건하정화반응6 h,가제비출결정도호차삼투성능교고적순상방비석분자사막.실온하해막적경기삼투솔위1.8×10-8 mol·m-2·s-1·Pa-1,H2/CO2기체분리인자위15,고우기노삼확산치(4.7).
The analcime( ANA)zeolite membranes were synthesized on the tubular mullite supports by the seconda-ry growth method using local cheap kaolin and diatomite as silica and aluminum sources. The X-ray diffraction ( XRD),scanning electron microscope( SEM)and gas permeation tests were used to characterize and evaluate the as-synthesized membranes. Several parameters were systematically investigated to evaluate their influence on crystal-lization and gas separation performance of the membranes,including the alkalinity,synthesis temperature and crys-tallization time. The results showed that pure ANA zeolite membranes with high crystallinity and good permeation performance were synthesized at 150℃ for 6 h under the optimized n( H2 O)/n( Na2 O)ratio of 200 in the synthesis sols. The hydrogen permeance and ideal selectivity of H2/CO2 are achieved to 1. 8 × 10 -8 mol·m-2 ·s-1 ·Pa-1 and 15,respectively,which is higher than their Knudsen diffusion values of 4. 7 at room temperature.