Process and plant for producing char and fuel gas

摘要

A method for producing char and fuel gas includes degasifying a carbonaceous material with oxygen-containing gases in a fluidized bed reactor at a temperature of more than about 1000° C. and at a pressure of from about 1 bar to about 40 bar. A supply of oxygen within the fluidized bed reactor is adjusted so as to recover more than 60% of fixed carbon in the carbonaceous material in a char product, and an oxygen availability in a lower or bottom region of the fluidized bed reactor is less than 80% of an oxygen availability in an upper region of the fluidized bed reactor.

主权项

1. A method for producing char and fuel gas, the method comprising:
providing a carbonaceous material to a lower or bottom region of a fluidized bed reactor operating at a temperature of more than about 1000° C. and at a pressure of from about 1 bar to about 40 bar, an oxygen availability in the lower or bottom region of the fluidized bed reactor being less than 80% of an oxygen availability in an upper region of the fluidized bed reactor such that the carbonaceous material is degasified in the lower or bottom region of the fluidized bed reactor and is partially combusted in the upper region of the fluidized bed reactor with oxygen-containing gases, the upper region of the reactor being above the lower or bottom region of the reactor; and adjusting a supply of oxygen within the fluidized bed reactor so as to recover more than 60% of fixed carbon in the carbonaceous material in a char product.