石油炼制与化工
石油煉製與化工
석유련제여화공
PETROLEUM PROCESSING AND PETROCHEMICALS
2015年
6期
30-35
,共6页
脱铝%β 分子筛%环烷烃%开环反应
脫鋁%β 分子篩%環烷烴%開環反應
탈려%β 분자사%배완경%개배반응
dealumination%βzeolite%cycloparaffin%ring-opening reaction
通过有机酸对β分子筛进行脱铝改性，采用 XRD，BET，NH3-TPD，FTIR，27Al MAS NMR 等手段对酸脱铝β分子筛样品进行表征，以乙基环己烷（ECH）为模型化合物考察环烷烃开环反应的性能。结果表明：随脱铝率的增加，β分子筛的相对结晶度、酸量、比表面积等均呈现先增加后降低的趋势；反应活性、丙烯收率及丙烯选择性也出现先增加后降低的趋势，但乙烯收率变化幅度较小，当脱铝率为41．7％时 ECH 开环反应性能最优。
通過有機痠對β分子篩進行脫鋁改性，採用 XRD，BET，NH3-TPD，FTIR，27Al MAS NMR 等手段對痠脫鋁β分子篩樣品進行錶徵，以乙基環己烷（ECH）為模型化閤物攷察環烷烴開環反應的性能。結果錶明：隨脫鋁率的增加，β分子篩的相對結晶度、痠量、比錶麵積等均呈現先增加後降低的趨勢；反應活性、丙烯收率及丙烯選擇性也齣現先增加後降低的趨勢，但乙烯收率變化幅度較小，噹脫鋁率為41．7％時 ECH 開環反應性能最優。
통과유궤산대β분자사진행탈려개성，채용 XRD，BET，NH3-TPD，FTIR，27Al MAS NMR 등수단대산탈려β분자사양품진행표정，이을기배기완（ECH）위모형화합물고찰배완경개배반응적성능。결과표명：수탈려솔적증가，β분자사적상대결정도、산량、비표면적등균정현선증가후강저적추세；반응활성、병희수솔급병희선택성야출현선증가후강저적추세，단을희수솔변화폭도교소，당탈려솔위41．7％시 ECH 개배반응성능최우。
βzeolite was modified by dealumination with organic acid,and the physicochemical prop-erties of the samples were characterized by XRD,BET,and NH3-TPD,27Al MAS NMR,FTIR. Ethyl cyclohexane (ECH)was used as a model compound to investigate the effect of modification on the per-formance of βzeolite for cycloparaffin ring-opening reaction. The results show that with increase of the dealumination degree,the crystallinity,specific surface area and acidic amount of the dealuminated βzeolites rise at first and then decrease. The conversion,propylene yield and selectivity show the same trend. But little change of ethylene yield is observed. ECH ring-opening reaction reaches the optimal extent at 41.7% dealumination.
