CAJ | 학술논문

在固定床不锈钢反应器中进行了 HZSM-5 分子筛催化甲醇制汽油(MTG)反应的催化性能和失活实验.采用热重、X 射线衍射、FT-IR、低温氮吸附-脱附、色谱-质谱联用仪等方法对催化剂进行了表征.结果表明,在反应进行到 336 h 时,甲醇转化率为 40%,汽油收率低至 12.6%,催化剂严重失活,但在 700℃有氧再生后活性恢复,且保持了完整的 MFI 结构.积炭是催化剂失活的主要原因,大部分积炭沉积在分子筛微孔中,积炭物种主要是带有双键的聚合态化合物和稠环芳烃.
재고정상불수강반응기중진행료 HZSM-5 분자사최화갑순제기유(MTG)반응적최화성능화실활실험.채용열중、X 사선연사、FT-IR、저온담흡부-탈부、색보-질보련용의등방법대최화제진행료표정.결과표명,재반응진행도 336 h 시,갑순전화솔위 40%,기유수솔저지 12.6%,최화제엄중실활,단재 700℃유양재생후활성회복,차보지료완정적 MFI 결구.적탄시최화제실활적주요원인,대부분적탄침적재분자사미공중,적탄물충주요시대유쌍건적취합태화합물화주배방경.
The catalytic performances and the main deactivation mode of HZSM-5 zeolite were investigated by methanol to gasoline (MTG) reaction in a stainless-steel fixed bed reactor. The catalyst was characterized by means of techniques such as TGA-DTA, XRD, FT-IR, N2 adsorption-desorption and GC-MS. The results showed that the methanol conversion was 40% and the gasoline yield could drop to 12.6% after 336 h for the reaction, resulting in the serious deactivation of HZSM-5 catalyst. However, the regenerated catalyst at 700℃ in the air had high activity and the MFI framework structure. It was found that the coke, which deposited mainly on micropores of HZSM-5, was the main reason for catalyst deactivation. The main components of coke deposits were polymer with double bond or/and polycyclic aromatic hydrocarbon.