High‐temperature char gasification of anthracite/petroleum coke: using biomass leachate as cheap‐effective additive

Abstract

Rice straw leachate (RSL) was employed as cheap‐effective biomass‐based additive for anthracite/petroleum coke (JM/PC) gasification. The influence of RSL on high‐temperature (1,000–1,300°C) char gasification reactivity and kinetics was analyzed by thermogravimetric analysis. The results demonstrate that for PC char, catalytic effect of RSL on its gasification reactivity existed within the whole temperature range and was initially weakened and then enhanced as gasification temperature increased (turning‐point temperature, 1,200°C). For JM char, as gasification temperature increased, the influencing form of RSL on its gasification reactivity was initially presented as the weakened catalytic effect and turned into the reduced inhibition effect within 1,200–1,300°C. These phenomena were mainly attributed to the concentration and activity variations of alkali/alkaline earth metal species derived from RSL during JM/PC char gasification at different temperatures. Kinetics analysis based on conventional models indicates that random pore model (RPM) was more suitable to describe char gasification. Moreover, RSL additive could reduce the activation energy of JM char and PC char gasification by 12.71 and 43.39 kJ·mol−1, respectively, which implied that RSL help to improve char gasification kinetics and exhibited more positive effect on PC char. Kinetics analysis based on free‐model method verified the reliability and accuracy of RPM.

Gasification of spent pot-lining from the aluminum industry

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“…The utilization in power production often occurs through a combined cycle known as Integrated Gasification Combined Cycle (IGCC). Through the usage of IGCC, an enhanced efficiency could be attained with a combination of gas and steam turbines, and clean conversion of the feedstock could be achieved through precombustion capture [18][19][20]. Entrained flow gasification (EFG) is the main technology used in IGCC due its many benefits [21,22].…”

Staged co‐gasification characteristics of pyrolyzed semi‐coke and antibiotic filter residue under oxy‐fuel condition

“…For the efficient and clean utilization of traditional energy, gasification technology offers great advantages. Compared with the direct combustion of solid fuels, gasification makes full use of carbon and hydrogen, 10 which also reduces carbon emissions 11 . At present, biomass‐derived energy has been well accepted 12,13 .…”

“…Ozonoh et al 21 studied a 5 MW cogeneration plant at different coal/solid waste ratios and found that the one half of coal and pine saw‐dust mixture minimized the emissions of CO, CO 2 , SO 2 , and NO x . Wei et al 10 used rice straw leachate (RSL) as cheap‐effective biomass‐based additive for anthracite/petroleum coke (JM/PC) gasification. The results demonstrated that RSL contributed to the improvement char gasification kinetics and exhibited more positive effect on PC char.…”