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【討論】分子篩為何小籠酸性強(qiáng)、大孔酸性弱 已有8人參與
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| 分子篩為何小籠酸性強(qiáng)、大孔酸性弱 |
至尊木蟲(chóng) (著名寫(xiě)手)

至尊木蟲(chóng) (職業(yè)作家)
資深木蟲(chóng)

銀蟲(chóng) (小有名氣)
木蟲(chóng) (著名寫(xiě)手)
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A relation exists between the T-O-T bond angles and the acid strength of the associated proton in the zeolites (11). The greater the angle, the stronger the sites.Thus, the protonic sites of HMOR (bond angle range between 143-180°) and HMFI(133-177°) are stronger than those of HFAU(138-147°). This explains why HMOR is and HFAU is not active in n-butane and n-hexane isomerizations at 200-250°C, two reactions requiring very strong acid sites. Again, the protonic sites (bond angles) of the zeolites are influenced by the basicity of the reactants and the temperature will also play a role. |

鐵蟲(chóng) (初入文壇)
至尊木蟲(chóng) (著名寫(xiě)手)

銀蟲(chóng) (小有名氣)
金蟲(chóng) (初入文壇)
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