97com I 亚洲精视频 I 91在线文字幕 I 色一伦 I 黄污视频网站 I 亚洲日本va在线视频观看 I 亚瑟av在线 I 婷婷国产天堂久久综合五月 I 欧美a级黄 I 中文亚洲欧美日韩无线码 I 亚洲深夜福利 I 黄色亚洲视频 I 久久免费精品国自产拍网站 I 激情综合婷婷丁香五月情 I www.色诱 I 亚洲午夜未满十八勿入网站2 I 国产午夜精品一区 I 天堂社区在线视频 I yyyy11111少妇影院 I 欧美激情在线观看一区二区三区 I 亚韩一区 I 中文字幕一区久久 I 九色国产 I 色婷婷中文字幕 I 精品视频久久久久 I 国产天天综合 I 在线亚洲精品国产一区二区 I 偷拍区清纯另类丝袜美腿 I 成人v精品蜜桃久久一区 I 黄色毛片在线播放 I 亚洲国产精品高清在线第1页 I 欧美日韩亚洲综合一区二区三区激情在线 I 日韩精品电影在线 I 99国产自在线 I 中国一级特黄真人毛片试看

[ 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.