【Learn Ethylene Together】Five questions per day to easily learn about ethylene 54

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【Learn about Ethylene Together】Five questions per day to easily learn about ethylene. 54 16. When the concentration of flammable substances in the air is higher than the upper limit for explosion, no explosion occurs, but combustion may take place. 17. The thermal stability of alkanes increases as the molecular weight increases. 19. The longer the residence time of the pyrolysis feedstock in the pyrolysis reactor tube, the more complete the reaction, and the higher the ethylene yield. 20. Aromatic hydrocarbons are less prone to ring-opening reactions in cracking reactions, and instead tend to undergo side-chain scission reactions. 21. After replacing the float valve tower with a packed tower in the gasoline distillation column, the tower efficiency and capacity can **be increased, but the pressure drop across the tower increases. 16. When the concentration of combustible substances in the air is above the explosion limit, no explosion will occur, but combustion may take place. √ 17. The thermal stability of alkanes increases as the molecular weight increases. × 19. The longer the residence time of the pyrolysis feedstock in the pyrolysis reactor tube, the more complete the reaction, and the higher the ethylene yield. × 20. Aromatic hydrocarbons are less prone to ring-opening reactions in cracking reactions, and instead tend to undergo side-chain scission reactions. √ 21. After replacing the float valve tower with a packed tower in the gasoline distillation column, the tower efficiency and capacity can **be increased, but the pressure drop across the tower increases. ×