Seeking heavy oil catalytic cracking technology (MCC)
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Is there anyone knowledgeable in heavy oil catalytic cracking technology (MCC)? What is the difference between it and conventional catalytic cracking technologies (DCC) as well as fluid catalytic cracking (FCC)? What are the capital investment requirements for a 2.4 million tons per year heavy oil catalytic cracking unit (MCC) together with DCC or FCC? And what is the product distribution of MCC? What are the approximate production volumes of liquefied petroleum gas, dry gas, gasoline, and diesel? What are the approximate contents of ethylene and propylene in dry gas and liquefied petroleum gas?
Come and take a look, learn a bit,, thanks
The biggest difference between MCC and DCC, FCC is that MCC can produce the largest amount of liquefied gas and light aromatics without producing oil products; generally, the dry gas yield is around 4.5%, the liquefied gas yield ranges from 40 to 50%, and the propylene content in the liquefied gas is between 45 and 50%. As for fixed asset investment, only one MCC plant with a capacity of 600,000 tons has been built in the country; the investment required is similar to that for FCC plants. If light aromatics are to be produced, an aromatic extraction unit is also necessary alongside the MCC plant
Technically, dual lift columns and dual fractionation towers are used. The propylene content is high, sometimes reaching 60%. As a supplementary note, there are currently two MCC units in operation in China, and another unit is set to start operating within this year.
Friends on the second floor, which two sets of devices are those?
Fluidized catalytic cracking (FCC) is a key technology used in modern refineries to upgrade heavy gas oil and residue. Haizhong Petrochemical, part of Shandong Qiwanda Group, operates a 600,000-ton MCC unit that produces liquefied gas, dry gas, light aromatics, and medium aromatics
Take a walk around, and you can also consult a design institute.
The technology of Shanghai Hetu Petrochemical Engineering Co., Ltd. – Simply put, it’s not accurate to say that it produces more olefins; the main function of the gasoline riser is to convert the high-carbon olefins in catalytic gasoline into low-carbon olefins, thereby increasing the yield of liquefied gas as well as the yields of C3 and C4 olefins. Another function is to recycle the catalyst from the gasoline settler to the heavy oil riser in order to lower the catalyst temperature and thereby increase the catalyst-to-oil ratio in the heavy oil riser.
The key technology of MCC is the dual riser, with full reprocessing of both gasoline and diesel, aimed at producing the maximum amount of aromatics; however, diesel and gasoline fractions are still produced, and their quality deteriorates.