固体^(13)C NMR谱编辑方法研究改性丝光沸石结炭

CHARACTERIZATION OF COKE ON MODIFIED H-MORDENITE ZEOLITE BY ^(13)C NMR SPECTRAL EDITING METHOD

通过13CCP／MASNMR技术，对经MgO改性后丝光沸石的结炭组成进行的研究表明，结炭的组成主要为缩聚程度较低的支链芳烃和少量烯烃；在保持分子筛活性的条件下分子筛的抗结炭能力较强，这可能与MgO改性后分子筛的酸性变化或孔径改变有关．

The components of coke, which were deposited on the MgO modified H-Mordenite zeolite, were studied by the 13C CP/MAS NMR spectral editing method in the present paper.The result shows that the major coke components were alkyl carbon and aromatic carbon,and the amount of deposited coke was dramatically reduced by the modified H-Mordenite zeolite.