摘要: Technical economy of HCC unit with a production capacity of300,000t is analyzed and compared with that of tubular furnace pyrolysis ethylene-making unit with the same production capacity.The ethylene production cost of HCC process is about 76%of that of tubular furnace and its internal rate of return is8.47%higher than the12.75%of tubular furnace process.HCC process has strong risk-resisting capability and high investment bene-fits.