S_2O_8^(2-)/ZrO_2固体起强酸催化剂上的正丁烷异构化反应(英文)

n-Butane Isomerization on Peroxodisulfated Zirconia Solid Superacid Catalyst

首次制备了S_2O_8^(2－)／ZrO_2固体超强酸，确证室温下它对正丁烷的反应活性比S_2O_4^(2－)／ZrO_2固体超强酸更强，对ZrO2有促进作用的非卤素阴离子中，S_2O_8^(2－)是最有效的．它的最佳焙烧温度是600℃，比S_2O_4^(2－)／ZrO_2体系低50℃，且于35℃时，正了烷在S_2O_8^(2－)／ZrO_2体系上反应20h的转化率为50．4％，而相同条件下的S_2O_4^(2－)／ZrO_2体系上仅为36．7％。由于S_2O_8^(2－)／ZrO_2（600℃）的△σS＝o＝52cm－1，S_2O_8^(2－)／ZrO_2固体超强酸对正丁烷的强活性是因为它有比S_2O_4^(2－)／ZrO_2固体起强酸更强的酸性．

The preparation of peroxodisulfated zirconia (PSZ) solid superacid catalyst is introduced. It proves more active than sulfated zirconia (SZ) for n-butane isomerization at ambient temperature, and among the non-halide anions having promotion action to ZrO2, S2O82- is the most effective. The optimum calcination tempera-ture is 600℃,which is 50℃ lower than that of SZ. The conversion of n-butane over PSZ s 50. 4% at 20 h at 35℃,and 36. 7% over SZ under the same condition- Since the △σ=0 of PSZ (600℃)is 52 cm-1, it can be conclud-ed that the higher activity of PSZ for n-butane isomerization is resulted from the stronger acid strength of PSZthan that of SZ.