The adsorbent can adsorb and desorb small molecules such as H, N2.CH, C0. C02.02 etc. under operating conditions, but it is difficult to desorb liquid, sulphide and many large molecules such as high hydrocarbons (Cs+), tar, naphthalene, benzene etc. after adsorption. These substances are equivalent to 'toxic substances' for the adsorbent, once the adsorbent is adsorbed the adsorbent will not be able to desorb and regenerate in time, or cannot be completely desorbed, the adsorbent will lose its activity, which will lead to a significant drop in the performance of the VPS small air separation units (processing capacity, product purity, etc.) and prevent normal operation; at the same time some substances such as naphthalene will also block the bed after agglomeration, resulting in an increase in pressure drop. Therefore, if these impurities are present before the raw gas enters the VPS small air separation units, pre-treatment of these impurities to remove them and protect the adsorbent in order to maintain a long and stable operation of the VPS unit is a necessary measure.
Dear Air separation 's VPS pre-treatment solutions meet a variety of needs and establish good long-term relationships with our customers.
