SO42-/ZrO2和SO42-/Al2O3-ZrO2催化剂上的正戊烷反应

研究了添加Al对SO₄^2-/ZrO₂超强酸样品的晶化、比表面、硫含量、超强酸性和正戊烷反应性能的影响,考察了活化温度、反应温度、Al含量和载Pt对催化剂活性和选择性的影响.SO₄^2-/Al₂O₃ZrO₂催化剂的酸强度与SO₄^2-/ZrO₂基本相当,但超强酸位比后者多,未载Pt时正戊烷反应活性和稳定性明显高于后者.负载Pt后,正戊烷异构化选择性和稳定性大大提高,但Pt/SO₄^2-/Al₂O₃ZrO₂催化剂的反应活性与Pt/SO₄^2-/ZrO₂相近,Al的促进作用不明显.

Pentane Reaction over SO42-/ZrO2and SO42/Al2O32ZrO2Catalysts

The effectof incorporation of ALInto ZrO₂on The crystallization, surface area, sulf ur content, superacidity and catalytic behavior of SO₄^2-/ZrO₂for n-pentane reaction was studied, and The effectof activation temperat ure, reaction temperat ure, Al content and Pt loading on The activity and selectivity of SO₄^2-/ZrO₂was investigated as well.The acid strengths of SO₄^2-/Al2O₃₂ZrO₂catalysts are almost identical with thatof SO₄^2-/ZrO₂catalyst, where as the formerhas more superacidic sites than The latter.Before loading with Pt, SO₄^2-/Al₂O₃₂ZrO₂catalyst isobviously more active and stable than SO₄^2-/ZrO₂for n-pentane conversion reaction.Supporting Pt can improve The isomerization selectivity and stability of The catalysts markedly, but The activi-ties of Pt/SO₄^2-/Al2O₃₂ZrO₂and Pt/SO₄^2-/ZrO₂catalysts for n₂pentane isomerization are almostidentical, demonst rating that The promoting effectof ALIs not evident in The presence of Pt andhydrogen.