CAJ | 학술논문

以 NaY、HY、液相Ce离子交换改性Y分子筛(L-CeY)为研究对象,运用Py-FTIR和NH3-TPD对Y型分子筛的酸类型、酸强度、酸量进行了表征；采用原位红外光谱技术研究了噻吩在 Y 型分子筛上的吸附和转化行为。结果表明,分子筛的B酸位是噻吩发生质子化及低聚反应的活性中心。Y 型分子筛对噻吩的催化活性顺序为L-CeY > HY,这可由 Y型分子筛B酸位的量和强度区别以及稀土离子物种与B酸中心的协同作用进行解释。
이 NaY、HY、액상Ce리자교환개성Y분자사(L-CeY)위연구대상,운용Py-FTIR화NH3-TPD대Y형분자사적산류형、산강도、산량진행료표정；채용원위홍외광보기술연구료새분재 Y 형분자사상적흡부화전화행위。결과표명,분자사적B산위시새분발생질자화급저취반응적활성중심。Y 형분자사대새분적최화활성순서위L-CeY > HY,저가유 Y형분자사B산위적량화강도구별이급희토리자물충여B산중심적협동작용진행해석。
Surface acidities of the Y zeolites (NaY、HY、L-CeY)were characterized by in-situ Py-FTIR and NH3-TPD methods.The adsorption and catalytic transformation behaviors of thiophene on Y zeolites were studied by in-situ FTIR technique.The results indicate that Br?nsted (B)acid sites of Y zeolites play an important role in the progress of protonation and oligomerization.The order of catalytic properties of Y zeolites is L-CeY > HY, which can be attributed to the concentration and strength of the surface acidities and the synergy between rare-earth ions species and Br?nsted (B)acid sites.