CAJ | 학술논문

以 NaY、HY、液相稀土 Ce 离子交换改性的 Y 分子筛(L-CeY)和稀土离子改性的超稳 Y 分子筛(HRSY-3)为研究对象，在氨气程序升温脱附(NH 3-TPD)和吡啶吸附傅里叶变换红外光谱(Py-FTIR)表征其酸性能的基础上，采用原位傅里叶变换红外光谱(In situ FTIR)技术以噻吩和四氢噻吩作为探针分子，研究噻吩硫化物在稀土离子改性的 Y 型(REY)分子筛上的吸附及转化行为。结果表明，室温条件下噻吩在分子筛强 B 酸中心作用下即可发生质子化反应，质子化的噻吩分子可进一步发生低聚反应，且稀土物种和非骨架铝有关的 L 酸中心与 B 酸的协同作用促进质子化噻吩向低聚物的转化；而四氢噻吩在 NaY、HY 及 REY 型分子筛上均无催化反应发生。
이 NaY、HY、액상희토 Ce 리자교환개성적 Y 분자사(L-CeY)화희토리자개성적초은 Y 분자사(HRSY-3)위연구대상，재안기정서승온탈부(NH 3-TPD)화필정흡부부리협변환홍외광보(Py-FTIR)표정기산성능적기출상，채용원위부리협변환홍외광보(In situ FTIR)기술이새분화사경새분작위탐침분자，연구새분류화물재희토리자개성적 Y 형(REY)분자사상적흡부급전화행위。결과표명，실온조건하새분재분자사강 B 산중심작용하즉가발생질자화반응，질자화적새분분자가진일보발생저취반응，차희토물충화비골가려유관적 L 산중심여 B 산적협동작용촉진질자화새분향저취물적전화；이사경새분재 NaY、HY 급 REY 형분자사상균무최화반응발생。
Surface acidities of the Y zeolites(NaY,HY,L-CeY and HRSY-3)were characterized by temperature-programmed desorption of ammonia(NH 3-TPD)and in situ fourier transform Infrared Spectroscopy using pyridine as probe molecule (Py-FTIR).The adsorption and catalytic transformation behaviors of sulfides on Y zeolites modified by rare ions were studied by in situ fourier transform Infrared Spectroscopy (in situ FTIR)technology using thiophene andthiophane as the probe molecules, respectively.The results indicated that thiophene molecules protonated upon the strong Br?nsted acid sites of the zeolites at room temperature,then protonated products could further oligomerize.The synergy between L acid sites (included Ce species andnon-framework aluminum species)and Br?nsted (B)acid sites was favorable to oligomerization reaction of Thiophene, however,there were no reactions of thiophane over NaY,HY and REY.