Synergistic effect on co-gasification reactivity of biomass-petroleum coke blended char

In this work, effects of gasification temperature ( 900 degrees C-1100 degrees C) and blended ratio ( 3: 1, 1: 1, 1: 3) on reactivity of petroleum coke and biomass co-gasification were studied in TGA. Quantification analysis of active AAEM transformation and in situ investigation of morphological structure variations in gasification were conducted respectively using inductively coupled plasma optical emission spectrometer and heating stage microscope to explore synergistic effect on co-gasification reactivity. The results indicated that char gasification reactivity was enhanced with increasing biomass proportion and gasification temperature. Synergistic effect on co-gasification reactivity was presented after complete generation of biomass ash, and gradually weakened with increasing temperature from 1000 degrees C to 1100 degrees C after reaching the most significant value at 1000 degrees C. This phenomenon was well related with the appearance of molten biomass ash rich in glassy state potassium and the weakest inhibition effect on active potassium transformation during co-gasification at the temperature higher than 1000 degrees C. (C) 2017 Elsevier Ltd. All rights reserved.