投稿网址：http：//journal.lnpu.edu.cn辽宁石油化工大学学报JOURNALOFLIAONINGPETROCHEMICALUNIVERSITY第43卷第4期2023年8月Vol.43No.4Aug.2023基于原位红外光谱法的β分子筛上噻吩烷基化反应机理探究孙祥博，惠宇，张景威，李志颖，秦玉才，宋丽娟（辽宁石油化工大学石油化工学院，辽宁抚顺113001）摘要：运用原位红外光谱技术系统探究了噻吩与1‐己烯在Hβ分子筛上的吸附、竞争吸附和烷基化转化行为，讨论了不同酸性位在噻吩及烯烃分子发生烷基化反应过程中所扮演的角色。结果表明，1‐己烯分子优先在B酸位上吸附，并容易发生质子化和二聚反应，因此与噻吩分子的吸附及质子化反应过程存在显著的竞争关系；在Hβ分子筛非骨架铝物种上吸附的噻吩分子更易于与邻近B酸中心上质子化的1‐己烯分子发生烷基化反应。研究结果可为烷基化脱硫分子筛催化剂的开发提供基础理论数据支撑。关键词：Hβ分子筛；噻吩；原位红外；烷基化反应；非骨架铝中图分类号：TE624.4；TQ028.8文献标志码：Adoi：10.12422/j.issn.1672‐6952.2023.04.010StudyonMechanismofThiopheneAlkylationReactiononHβZeolitesbyIn‐SituInfraredSpectroscopySunXiangbo，HuiYu，ZhangJingwei，LiZhiying，QinYucai，SongLijuan（SchoolofPetrochemicalEngineering，LiaoningPetrochemicalUniversity，FushunLiaoning113001，China）Abstract:Theadsorptioncompetitiveadsorptionandconversionbehaviorsofthiopheneand1‐hexeneonHβmolecularsievehavebeenstudiedbyusingthemethodofin‐situinfraredspectroscopyTherolesofdifferentacidicsitesinthealkylationreactionofthiopheneandolefinmoleculeweresystematicallydiscussed.Theresultsshowthat1‐hexeneispreferentiallyadsorbedontheBacidsites,anditseasytodimerizethroughprotonationactivation.Thus,thereisasignificantcompetitiverelationshipbetweentheadsorptionofthiophenemoleculesandtheprotonationreactionprocess.Moreover,itcanbeconfirmedthattheadsorbedthiophenemoleculeonnon‐frameworkaluminumonzeolitearemorelikelytoitsalkylationwithaprotonation1‐hexenemoleculenearthecenteroftheBacidThisresultscanprovidebasictheoreticalguidanceforthedevelopmentofzeolitecatalystsforalkylationdesulfurizationprocesses.Keywords:Hβzeolite；Thiophene；In‐situinfraredspectroscopy；Alkylationreaction...
