期刊
ENERGY SOURCES PART A-RECOVERY UTILIZATION AND ENVIRONMENTAL EFFECTS
卷 44, 期 3, 页码 8135-8145出版社
TAYLOR & FRANCIS INC
DOI: 10.1080/15567036.2022.2120575
关键词
Co-Pyrolysis-Gasification; Ac-AAEMs; physicochemical structures; corn stovers; coal
资金
- Heilongjiang Postdoctoral Program [LBH-Z21133]
- China Postdoctoral Science Foundation [2021M690824]
This paper investigates the influences of active alkali and alkaline earth metals (Ac-AAEMs) on the physicochemical properties of chars during co-pyrolysis-gasification coupling. The experimental results demonstrate that Ac-AAEMs, especially those in OCS, significantly promote the development of mesopores and catalyze the specific surface area of chars. Additionally, Ac-AAEMs contribute to the destruction of highly graphitized carbon structures and the formation of disordered amorphous carbon.
The influences of active alkali and alkaline earth metals (Ac-AAEMs) on the physicochemical properties of chars during co-pyrolysis-gasification coupling were studied in this paper. The mixed samples were obtained according to four mixing ways: original coal and original corn stovers (OSM+OCS), pickling coal and original corn stovers (PSM+OCS), original coal and pickling corn stovers (OSM+PCS), and pickling coal and pickling corn stovers (PSM+PCS). The influences of Ac-AAEMs in OSM (Ac-AAEMs-OSM), Ac-AAEMs in OCS (Ac-AAEMs-OCS), and Ac-AAEMs in OSM+OCS (Ac-AAEMs-blends) on the pore structures of gasification chars were characterized by I-OSM, I-OCS, and IOSM+OCS, respectively. The results showed that Ac-AAEMs-OCS and Ac-AAEMs-blends, especially Ac-AAEMs-OCS, significantly promoted the development of mesopores. Furthermore, Ac-AAEMs-OCS and Ac-AAEMs-blends have good catalytic effects on the specific surface area of chars, especially at 20 minutes of gasification. Compared with PSM+PCS char, the specific surface areas of PSM+OCS char, OSM+OCS char, and OSM+PCS char obtained at 20 minutes of gasification increased by 203%, 157%, and 7%, respectively. Besides, the Ac-AAEMs are conducive to destroying the carbon structure with a high graphitization degree and promoting the formation of disordered amorphous carbon. The magnitude of their catalytic ability is Ac-AAEMs-blends >Ac-AAEMs-OCS>Ac-AAEMs-OSM.
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