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用NH_3—TPD法、Py—IR法对Pt—B/HM’的酸性进行了表征.Pt—B/HM’改性后中等强度的酸中心数下降,B酸、L酸浓度依次减少.含硼量0.1%(m)的催化剂对于间二甲苯、C_8芳烃的临氢异构化有着优异的催化活性和选择性.
The acidity of Pt-B / HM ’was characterized by NH_3-TPD method and Py-IR method. The number of moderate-strength acid sites decreased after modification with Pt-B / HM’and the concentrations of B acid and L acid decreased. The 0.1% (m) boron catalyst has excellent catalytic activity and selectivity for the hydroisomerization of m-xylene and C_8 aromatics.