期刊
ACS SUSTAINABLE CHEMISTRY & ENGINEERING
卷 7, 期 1, 页码 238-248出版社
AMER CHEMICAL SOC
DOI: 10.1021/acssuschemeng.8b02967
关键词
Woody biomass; Alkali metal ceramics; In situ CO2 capture; Kinetic analysis; iso-Conversional methods
资金
- National Natural Science Foundation of China [51506112]
- Volvo Group in a research project of the Research Center for Green Economy and Sustainable Development, Tsinghua University [20183910020]
- EPSRC [EP/G01244X/1] Funding Source: UKRI
Effects of alkali ceramics, Na2ZrO3 (NZ) and Li4SiO4 (LS), were quantified in the catalytic pyrolysis of sawdust, using thermogravimetric analysis and kinetic modeling. Results indicated that the alkali ceramics were able to initiate thermal decomposition at lower temperatures and enhanced H-2 yield. The mean activation energies estimated by Kissinger-Akahira-Sunose (KAS), Flynn-Wall-Ozawa (FWO) and Friedman methods were within the range of 162-166, 114-116, 112-117 kJ mol(-1) for sawdust (SD), sawdust mixed with Li4SiO4 (SD-LS) and sawdust mixed with Na2ZrO3 (SD-NZ), respectively. The theoretical and experimental master plots constructed for SD closely match with theoretical master plot corresponding to three-dimensional diffusion (Ginstling-Brounshtein equation) (D4) reaction model. The SD-LS and SD-NZ samples followed first-order (F1) reaction model at lower conversions and shifted from F1 to three-dimensional diffusion (D4) reaction model at higher conversions.
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