图共 8个 表共 3
    • 图  FIG. 203.  FIG. 203.

      Figure FIG. 203..  FIG. 203.

    • 图  1  还原后各催化剂的(a)XRD 谱图和(b)铜晶粒尺寸图

      Figure 1.  (a) XRD patterns and (b) Cu crystallite sizes of the catalysts after reduction

    • 图  2  还原后催化剂CS-450和CSY-450的TEM图和铜晶粒尺寸分布图

      Figure 2.  TEM images and Cu crystallite size distributions of CS-450 and CSY-450 catalysts after reduction

    • 图  3  各催化剂的(a)N2吸附-脱附等温曲线和(b)孔径分布图

      Figure 3.  (a) N2 adsorption-desorption isotherm curves and (b) pore size distribution curves of the catalysts

    • 图  4  各催化剂的H2-TPR图

      Figure 4.  H2-TPR patterns of the catalysts

    • 图  5  还原后各催化剂的NH3-TPD图

      Figure 5.  NH3-TPD patterns of the catalysts after reduction

    • 图  6  还原后各催化剂的(a)Cu2p XPS能谱图和(b)XAES能谱图

      Figure 6.  (a) Cu2p XPS spectra and (b) XAES spectra of the catalysts after reduction

    • 图  7  CS-450和CSY-450催化剂的稳定性能

      Figure 7.  Stability of CS-450 and CSY-450 catalysts

    • Catalysts w/%1) SBET/
      (m2·g−1)
      Vpore/
      (cm3·g−1)
      Dpore/nm
      Cu loading RE loading
      CS-450 70.1 0 103.3 0.246 8.5
      CSY-450 69.2 2.5 44.9 0.244 23.0
      CSLa-450 69.7 2.6 52.6 0.273 21.3
      CSCe-450 68.9 2.6 48.7 0.230 18.9
      CSPr-450 68.6 2.5 44.1 0.215 20.5
      1) Measured by ICP- AES

      表 1  各催化剂的物理结构特性

      Table 1.  Physical Textural properties of the catalysts

    • Catalysts Distribution of acid sites1)
      Weak acid site ( α ) Medium acid site ( β ) Strong acid site ( γ ) Total
      CS-450 0.52(231) 0.31(356) 0.17(488) 1.00
      CSY-450 0.41(270) 0.35(417) 0.19(570) 0.95
      CSLa-450 0.35(278) 0.25(433) 0.23(595) 0.83
      CSCe-450 0.30(270) 0.22(429) 0.10(591) 0.62
      CSPr-450 0.27(284) 0.23(437) 0.14(590) 0.64
      1) Determined on the basis of the total NH3 desorption amount of CS-450 assigned as 1.00; Values in parentheses are the temperatures of peak αβ or γ in Fig.5

      表 2  还原后各催化剂表面的酸性位分布情况

      Table 2.  Distribution of acid sites on the surface of catalysts after reduction

    • Catalysts EA conversion/% EtOH selectivity/%
      CS-450 90.0 99.3
      CSY-450 96.3 99.1
      CSLa-450 95.6 99.1
      CSCe-450 94.2 99.2
      CSPr-450 94.6 99.2
      CS-750 62.7 99.3
      CSY-750 91.9 99.3

      表 3  各催化剂的催化加氢性能

      Table 3.  Catalytic hydrogenation performances of the catalysts