DID气体纯化器原理？ 1.1 theory of operation the ultrapure™ purifying material is initially processed as particles of about 100 microns diameter, which are pressed to from pellets. this gives the advantage of a large effective surface area to react with the impurities, while maintaining a low pressure drop across the purifier bead. the purifier material has been coated with a thin oxide layer during the manufacturing process. when the purifier is activated by heating in an inert atmosphere or under vacuum, this oxide diffuses into the bulk of the grains this leaves a clean surface to react with the impurities as the gas stream flows through the purifier, contaminants are chemically sorbed at the surface of the purifier material. by maintaining an operating temperature in the range of 350 - 450 °c, the impurities that have formed compounds on the surface can continuously diffuse into the bulk of the material, thereby maintaining a fresh, reactive surface. the above describes the reaction for all impurities except hydrogen. hydrogen is reversibly sorbed and has an equilibrium pressure dependent upon the temperature of operation and the amount of hydrogen absorbed. if hydrogen capacity is reached, (e.g., by a large amount of h2, h2o, or ch4), and it is important to maintain hydrogen levels in the ppb range in the purified gas, then the hydrogen capacity can be recovered by raising the purifier temperature to 450 - 500 °c for at least one hour, thereby driving off the previously absorbed hydrogen. 不用求人，看完，再加上一定的操作经验，就懂了。查看更多
第1天
关注盖德视界
添加小助手
