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Pyrolysis kinetics of coking coal mixed with biomass under non-isothermal and isothermal conditions

2014; Elsevier BV; Volume: 155; Linguagem: Inglês

10.1016/j.biortech.2014.01.005

1873-2976

Ha Myung Jeong, Myung Won Seo, Sang Mun Jeong, Byung Ki Na, Sang Jun Yoon, Jae Goo Lee, Woon Jae Lee,

Coal and Its By-products

To investigate the kinetic characteristics of coking coal mixed with biomass during pyrolysis, thermogravimetric (TG) and thermo-balance reactor (TBR) analyses were conducted under non-isothermal and isothermal condition. Yellow poplar as a biomass (B) was mixed with weak coking coal (WC) and hard coking coal (HC), respectively. The calculated activation energies of WC/B blends were higher than those of HC/B blends under non-isothermal and isothermal conditions. The coal/biomass blends show increased reactivity and decreased activation energy with increasing biomass blend ratio, regardless of the coking properties of the coal. The different char structures of the WC/B and HC/B blends were analyzed by BET and SEM.