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    • 2. 发明申请
    • 触媒構造体と被処理ガス浄化装置
    • 催化剂结构和气体净化装置
    • WO1996014920A1
    • 1996-05-23
    • PCT/JP1995/002323
    • 1995-11-14
    • バブコック日立 株式会社加藤 泰良石川 富久永井 良憲森田 勇人向井 正人山田 晃広道本 孝司森井 政治黒田 博
    • 加藤 泰良石川 富久永井 良憲森田 勇人向井 正人山田 晃広道本 孝司森井 政治黒田 博
    • B01D53/36
    • F01N3/2821B01D53/8631B01J35/02B01J35/04F01N3/2814F01N2330/42
    • A catalyst structure is obtained by cutting a catalyst element (1) coated with a catalytically active component in such a manner that protuberant portions (2) are inclined at an angle of 45 DEG to the side edge (1a) of the catalyst element having a rectangular planar shape, and laminating a plurality of such catalyst elements (1) into a catalyst frame while alternately reversing the face and back of the catalyst elements (1), and a passage of gas to be treated is defined so that the protuberant portions (2) of the catalyst elements (1) describe an angle of 0 to 90 DEG to the gas flow (6). When the catalyst structure comprising the catalyst elements (1) coated with a denitrification catalyst is disposed in the exhaust gas flow passage, for example, the protuberant portions (2) of the catalyst element (1) operate as weirs and a turbulent flow occurs on the back flow side of the protuberant portions (2), so that ammonia and NOx in the exhaust gas are more likely to come into contact with the catalyst. Further, as the gas flow (6) is disturbed, the boundary film on the catalyst surface becomes thinner, so that diffusion of ammonia and NOx becomes easier and catalytic activity can be drastically improved. In this way, catalyst performance can be effectively exhibited without much lowering the pressure loss of the gas flow.
    • 催化剂结构是通过切割涂有催化活性组分的催化剂元件(1),使得突起部分(2)以相对于催化剂元件的侧边缘(1a)成45度的角度倾斜, 矩形平面形状,并且将交替地反转催化剂元件(1)的表面和背面的多个这样的催化剂元件(1)层压到催化剂框架中,并且限定待处理气体的通道,使得突起部分 催化剂元件(1)的2)表示与气体流(6)0至90°的角度。 当将包含脱氮催化剂的催化剂元件(1)的催化剂结构设置在排气流路中时,例如,催化剂元件(1)的突出部(2)作为堰起作用,湍流发生在 突出部分(2)的后流侧,使得废气中的氨和NOx更可能与催化剂接触。 此外,随着气体流动(6)的干扰,催化剂表面上的边界膜变薄,因此氨和NOx的扩散变得更容易,催化活性显着提高。 以这种方式,可以有效地显示催化剂性能,而不会大大降低气流的压力损失。