Hydrate water system build process by observation under a microscope 3A molecular sieve powder was added in tetrahydrofuran (THF), moving speed measurement interface hydrate hydrate phase. The results show that: the growth rate at different temperatures hydrate have a consistent interface law, and changes little with temperature, Jincheng molecular sieves, the maximum value of about 1.1μm / s; interface while the growth rate as the reaction proceeds slow slow decrease. Pyrolysis gas typically contains water, Changzhi 400-700ppm molecular sieve, which when moisture freezes cryogenic separation operation, while at high pressure and low temperature, water also with light alkanes (such as: CH4, C2H6 and C3H8 etc.) a white crystalline hydrocarbon hydrates. The hydrocarbon hydrate ice crystals can lead to clogged pipes and equipment, resulting in parking. Thus, the oil in the pyrolysis gas before cryogenic separation must be dried depth, so that the water content of the pyrolysis gas is reduced to less than 5ppm (i.e., its dew point below -60 ℃). Now widely recognized as the most widely used and desired depth of 3A zeolite molecular sieve adsorbents dried, Lucheng sieve, since it only cracked gas adsorbed water molecules, molecular sieve, does not adsorb large hydrocarbon molecules (eg: C2H6, C2H4, C3H8 and C3H6, etc.), and thus avoid internal olefin compound in the zeolite channels coke, thus prolonging the service life of the adsorbent. Molecular sieve, sieve Shuozhou, there is a new molecular sieves (high merchant) by the Shanghai new molecular sieve Limited. Shanghai new molecular sieve Limited (www.molsionms.com) in this area poured elemental boundless enthusiasm and passion, new molecular sieve has been customer-centric, for customers to create the concept of value, quality, service to win the market, sincerely we hope to cooperate with the community to create success, to create brilliant. Related businesses welcome inquiries, contact: Pan.