久久精品99视频 , 国产免费福利体检区久久 , 爱啪精品导航在线 , 久久久久综合中文字幕,国产一区二区在线观看免费,一区二区三区日韩免费播放,国产一区二区精品久久凹凸

[ Products Description ] 
Porous ceramic balls is also called filtering balls. It is made by adding 20-30% pores inside the inert ceramic balls. Therefore it can be used not only for supporting and covering the catalyst, but also for filtering and eliminating the impurities of grain, gelatin, asphaltine, heavy metals and iron ions of less than 25µm. If the porous ball is set on the top of a reactor, the impurities fail to be eliminated in former process could be adsorbed in the pores inside the balls, thereupon protect the catalyst and prolong the operatig cycle of the system. As the impurities present in the materials are different, the user can select the product by their sizes, pores and porosity, or if necessary, add molybdenum, nickel and cobalt or other active components to prevent the catalyst from coking or poisoning.