氟化铵刻蚀对ZSM-5分子筛结构及酸性的调控机制

王靖, 肖瑶, 俞鑫, 易先锋, 郑安民

Influence Mechanism of NH₄F Etching on the Structure and Acidity of ZSM-5 Zeolite

WANG Jing, XIAO Yao, YU Xin, YI Xianfeng, ZHENG Anmin

表1 ZSM-5分子筛原粉及不同浓度NH₄F刻蚀样品的比表面积、孔体积、相对结晶度及硅铝比

Table 1 Specific surface area, pore volume, relative crystallinity, and Si/Al molar ratio of the parent and NH₄F-etched ZSM-5 samples

Sample	S_BET^a /m²g^-1	S_micro^a /m²g^-1	V_pore^a /cm³g^-1	V_micro^a /cm³g^-1	V_meso^a /cm³g^-1	Crystallinity^b /%	Si/Al^c
Z5-parent	431	406	0.21	0.17	0.04	100	29.8
Z5-10%F	424	405	0.21	0.17	0.04	91	31.9
Z5-20%F	407	386	0.26	0.16	0.10	86	32.6
Z5-40%F	407	363	0.30	0.15	0.15	80	34.0