Shaped activated coke (AC) were prepared from circulating fluidized bed coal pyrolysis semi-coke and coal tar by CO2 activation. Different proportions of V2O5, Cr2O3 and Fe2(SO4)3 were loaded on ACs by pore volume impregnation. Abrasion and compressive strength of ACs were measured according to corresponding GB. Pore structure of the ACs was characterized by N2 adsorption, and desulfurization performances of different ACs were tested on fixed bed system. Results show that the proper shaping condition are: coal tar of 30%, carbonization temperature of 600 ℃ and carbonization time of 60 min. The proper activation condition are: CO2 flow rate of 15 ml?min-1?g-1, activation temperature of 950 ℃ and activation time of 80min. Desulfurization performances of ACs show a significant positive correlation with specific surface area, microporous pore volume and total pore volume. Loading V2O5 highly improved the desulfurization performance of ACs and the optimum proportion of V2O5 is 1%. Loading Cr2O3 or Fe2(SO4)3 cannot improve desulfurization performance. The proper space velocity is 1500 h-1 while using AC for flue gas desulfurization and desulfurization efficiency above 90% can maintain more than 4 h in this space velocity.
ZHU Yan ZENG Wei-qiang WANG Qin-hui FANG Meng-xiang LUO Zhong-yang SHI Zheng-lun
. Activated Coke Prepared by Circulating Fluidized Bed Coal Pyrolysis Semi-coke for Desulphurization[J]. The Chinese Journal of Process Engineering, 2017
, 17(2)
: 333
-338
.
DOI: 10.12034/j.issn.1009-606X.216305
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