CAJ | 학술논문

采用不同后处理手段（碱处理、水汽处理以及碱处理-水汽处理）对HZSM-5沸石的孔结构和酸性质进行了调变，并对其丁烯裂解性能进行了研究。运用N2吸脱附、扫描电镜（SEM）、X射线衍射（XRD）以及吡啶吸附红外（Py-IR）对后处理改性前后的沸石样品的物理化学性质进行了表征。碱处理后HZSM-5的质子酸量增加，在5～20 nm处具有分布较宽的介孔，其反应活性升高，丙烯选择性下降，但失活速率没有加快。单独水汽处理在2～4 nm处产生介孔，但介孔体积较小。碱处理-水汽处理在2～4和5～20 nm处具有双分布介孔，前者分布较集中，后者分布较宽。单独水汽处理和碱处理-水汽处理的样品可以提高HZSM-5的丙烯选择性，主要归功于酸量的降低；反应2.5 h后具有较稳定的丙烯收率（高碱浓度处理-水汽处理的样品除外）。
채용불동후처리수단（감처리、수기처리이급감처리-수기처리）대HZSM-5비석적공결구화산성질진행료조변，병대기정희렬해성능진행료연구。운용N2흡탈부、소묘전경（SEM）、X사선연사（XRD）이급필정흡부홍외（Py-IR）대후처리개성전후적비석양품적물이화학성질진행료표정。감처리후HZSM-5적질자산량증가，재5～20 nm처구유분포교관적개공，기반응활성승고，병희선택성하강，단실활속솔몰유가쾌。단독수기처리재2～4 nm처산생개공，단개공체적교소。감처리-수기처리재2～4화5～20 nm처구유쌍분포개공，전자분포교집중，후자분포교관。단독수기처리화감처리-수기처리적양품가이제고HZSM-5적병희선택성，주요귀공우산량적강저；반응2.5 h후구유교은정적병희수솔（고감농도처리-수기처리적양품제외）。
The structure and acidity of HZSM-5 zeolites were modified using different post treatment methods: alkaline treatment, steam treatment, and alkaline-steaming treatment. The catalytic performances of modified zeolites were tested in 1-butene catalytic cracking. Their physicochemical properties were characterized by N2 adsorption, scanning electron microscopy (SEM), X-ray diffraction (XRD), and infrared spectroscopy with pyridine adsorption (Py-IR). The acidities of zeolites increased after the alkaline treatment, and as a result, the activity of butene cracking increased and the selectivity of propylene decreased. However, the deactivation rate of alkaline-treated zeolites had no significant change. There was a pronounced development of mesopores (5—20 nm) with a broad pore-size distribution in alkaline-treated ZSM-5 zeolites. Mesopores (2—4 nm) with a narrow distribution is observed after steaming treatment, while the mesopore volume is low. Zeolites after alkaline- and steaming-treatment showed two kinds of mesopore distributions, 2—4 nm (narrow) and 5—20 nm (broad). Due to the decrease of Br?nsted acidic sites, the selectivity of propylene increased over ZSM-5 zeolites with any of the post treatments; a relatively stable propylene yield was obtained after the reaction of 2.5 h (except for zeolites treated with high concentration of alkaline followed by steaming treatment).