图共 6个 表共 2
    • 图  FIG. 376.  FIG. 376.

      Figure FIG. 376..  FIG. 376.

    • 图  1  催化剂样品的扫描电子显微镜图

      Figure 1.  SEM images of catalyst samples

    • 图  2  氮气吸附-解吸等温线:(a)不同温度下制备的催化剂与沸石分子筛;(b)氧化锰不同包覆量的催化剂

      Figure 2.  N2 Isothermal adsorption and desorption curves: (a) Catalysts prepared at different temperatures and zeolite molecular sieve; (b) Catalysts with different manganese oxide supporting contents

    • 图  3  催化剂的XPS谱图:不同温度下制备的催化剂与沸石分子筛的O 1s谱(a)和Mn 2p谱(c);不同氧化锰包覆量催化剂的O 1s谱(b)和Mn 2p谱(d)

      Figure 3.  XPS patterns of the different catalysts:(a) O 1s and (c) Mn 2p of catalysts prepared at different temperatures and zeolite molecular sieve ; (b) O 1s and (d) Mn 2p of catalysts prepared with different manganese oxide coating content

    • 图  4  甲苯转化率:(a)不同温度下制备的催化剂;(b)冰浴下制备的不同包覆量的催化剂

      Figure 4.  Toluene conversion: (a) Catalysts prepared at different temperatures; (b) Catalysts prepared under ice water bath with different coating contents

    • 图  5  不同气体空速下催化剂对甲苯的催化

      Figure 5.  Catalyst for toluene at different GHSV

    • Samples SBET/ (m2·g–1) DBJH/nm Porosity/(cm3·g–1)
      13X zeolite 693.12 3.82 0.34
      Mn/Z-I-2 532.26 8.81 0.26
      Mn/Z-R-2 563.79 6.00 0.26
      Mn/Z-B-2 577.02 6.52 0.27
      Mn/Z-I-1 588.18 6.27 0.29
      Mn/Z-I-3 507.33 7.75 0.26
      Mn/Z-I-5 283.01 20.71 0.10

      表 1  催化剂样品与沸石分子筛的比表面积与孔径

      Table 1.  Special surface area and pore size of all catalyst samples and zeolite molecular sieve

    • Samples w(Mn)/% n(Olatt)∶n(Oad) n (Mn3+)∶n (Mn4+)
      Mn/Z-I-2 14.92 1.33 0.74
      Mn/Z-R-2 14.85 1.21 0.69
      Mn/Z-B-2 14.88 1.25 0.67
      Mn/Z-I-1 8.05 0.67 1.03
      Mn/Z-I-3 17.84 1.37 0.70
      Mn/Z-I-5 22.98 1.78 0.56

      表 2  催化剂样品的元素组成

      Table 2.  Element composition of catalyst samples