CAJ | 학술논문

由NH4 Y分子筛制备了HY分子筛,运用N2吸附、NH3-TPD和Py-FTIR等手段表征HY分子筛的物化性能；采用智能重量分析仪(IGA)方法研究了甲基噻吩(2-甲基噻吩、3-甲基噻吩)在HY分子筛上的吸附-脱附行为；采用程序升温脱附-质谱( TPD-MS)联用手段研究了甲基噻吩在HY分子筛上的转化行为。结果表明,在200℃下2-甲基噻吩和3-甲基噻吩在HY分子筛中的强B酸上发生强化学吸附作用,与B酸结合后生成了甲基噻吩的碳正离子结构进而发生了歧化反应、脱烷基反应以及裂化反应；与2-甲基噻吩不同的是,3-甲基噻吩与HY通过一定的氢转移反应生成了3-甲基四氢噻吩,且200℃吸附条件下3-甲基噻吩比2-甲基噻吩更容易发生裂化反应。
유NH4 Y분자사제비료HY분자사,운용N2흡부、NH3-TPD화Py-FTIR등수단표정HY분자사적물화성능；채용지능중량분석의(IGA)방법연구료갑기새분(2-갑기새분、3-갑기새분)재HY분자사상적흡부-탈부행위；채용정서승온탈부-질보( TPD-MS)련용수단연구료갑기새분재HY분자사상적전화행위。결과표명,재200℃하2-갑기새분화3-갑기새분재HY분자사중적강B산상발생강화학흡부작용,여B산결합후생성료갑기새분적탄정리자결구진이발생료기화반응、탈완기반응이급열화반응；여2-갑기새분불동적시,3-갑기새분여HY통과일정적경전이반응생성료3-갑기사경새분,차200℃흡부조건하3-갑기새분비2-갑기새분경용역발생열화반응。
HY zeolite obtained from NH4 Y was characterized by N2 physisorption, NH3-TPD, and in-situ Py-FTIR. The adsorption, desorption, and conversion of methylthiophene on the HY zeolite was investigated by using the intelligent gravimetric analysis ( IGA ) and temperature programmed desorption-mass spectrum ( TPD-MS ) . The results indicated that 2-methylthiophene and 3-methylthiophene are strongly chemisorbed on the strong Br?nsted acid sites of HY zeolite, which promote the disproportionation, dealkylation and cracking reactions at 200 ℃. Compared with 2-methylthiophene, 3-methylthiophene is prone to crack and form 3-methyltetrahydrothiophene via the hydrogen transfer reactions.