工业上用的催化剂一般都是分散在載体上以提高它的分散性,机械强度,对溫度作用及毒物的抵抗性等。同时載体对催化剂的活性及选擇性具有密切的影响,因此关于載体的研究在工业上具有十分重要的意义。苏联和其他国家学者曾指出載体的化学組成,比表面,載体上催化剂的浓度或遮盖度等都对催化剂的活性有很大的影响,甚至会改变催化剂的选擇性。近来И.Е.Неимарк,Г.К.Боресков等研究孔性对扩散的影响时还指出为着使表面充分利用,在催化剂中需要有大量大孔徑的过道孔。可是过去这些工作中都沒有注意 Industrial catalysts are generally dispersed on the carrier to improve its dispersion, mechanical strength, the role of temperature and toxic resistance and so on. At the same time, the carrier has a close influence on the activity and selectivity of the catalyst, so the research on the carrier is of great industrial significance. The Soviet Union and other countries have pointed out that the chemical composition of the carrier, the specific surface, the concentration or the coverage of the catalyst on the carrier, etc. all have a great influence on the activity of the catalyst and may even change the selectivity of the catalyst. Recently, И.Е.Неимарк, Г.К.Боресков and others studied the effect of porosity on diffusion. They also pointed out that in order to make full use of the surface, a large number of large-aperture aisle openings are needed in the catalyst. But in the past these work did not pay attention