... , sulfur dioxide, carbon dioxide,ethylene, propylene and so on,and the selective adsorption performance to water is ... (like air,natural gas, alkane, refrigerants and so on); produce and purify argon; Static dry drug ... DG molecular sieve is easy to absorb moisture,so please do not open the seal steel barrel ... the environment with dry and ventilated.Before use,please avoid it to adsorb water, organic gas ...