The BL Catalytic Gasification of High-Metamorphous Anthracite in Scaled-up and Continuous Fluidized Beds

摘要

The experiment of mixing-gas (air/steam) catalytic gasification using black liquor (BL) as the catalyst for high-metamorphous anthracite of Fujian Yongan with lower volatile V_(ad) = 4.43% and higher ash A_(ad) = 27.11% has been carried out in a scaled-up and continuous fluidized bed with I.D. = 123 mm. Experiments indicate that the BL catalyst concentration and gasification temperature influence strongly the gasification results, the loading saturation level (LSL) of BL catalyst is about 7%-Na_2CO_3-BL-Loading and the most effective gasification temperature is T = 850 ℃ for the sodium alkali catalyst. Under the suitable operation conditions, I.e. 7%-Na2C03-BL-Loading and 850℃～880℃, the gas yield and calorific value increases respectively about 1.5 and 2.6 times of non-catalyst, I.e. reaches to Y_g= 4.6 m~3/kg·coal and QLHV = 5.3 MJ/m~3. That means using BL as a high effective and economically feasible catalyst in coal gasification has an exciting development prospect in the further industrial scaled-up.