Journal
ENERGY CONVERSION AND MANAGEMENT
Volume 237, Issue -, Pages -Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.enconman.2021.114100
Keywords
Torrefaction; Biomass chemical looping gasification (BCLG); Thermal characteristics; Products distribution; Kinetic analysis
Categories
Funding
- National Natural Science Foundation of China [22038011, 51976168]
- K. C. Wong Education Foundation, China Postdoctoral Science Foundation [2019M653626]
- Foundation of State Key Laboratory of High-efficiency Utilization of Coal and Green Chemical Engineering [2020-KF-06]
- Promotion Plan for Young People of Shaanxi Association for Science and Technology [20180402]
- Technology Foundation for Selected Overseas Chinese Scholar in Shaanxi Province [2018015]
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This study investigated the biomass chemical looping gasification (BCLG) of torrefied SPF sawdust with Fe2O3 using thermogravimetry-mass spectrometry (TG-MS). The results showed that torrefaction temperature and OC ratio have an impact on the BCLG process, with torrefaction having a positive effect on the gas distribution and reactivity of biochar.
The biomass chemical looping gasification (BCLG) of torrefied spruce-pine-fir (SPF) sawdust with Fe2O3 was studied using thermogravimetry-mass spectrometry (TG-MS). The effects of torrefaction temperature and OC ratio on the BCLG were investigated. The thermal characteristics of torrefied SPF with Fe2O3 and the distribution of gaseous products were discussed. Thermogravimetric kinetics and gas release kinetics were implemented to understand the mechanism. The results showed the volatiles release intensity of the SPF reached the maximum when the torrefaction temperature was 270 ?C. The solid?solid reaction performance between OC and biochar reached the highest as the OC fraction was 50 wt%. The thermogravimetric kinetics revealed the activation energy of the BCLG gained the minimum when the OC ratio was 50 wt%. Moreover, the increase of OC ratio and torrefaction temperature could improve the reactivity of biochar. The torrefaction affected the gaseous products distribution of the BCLG, which consequently promoted the H2/CO ratio of the syngas from 1.06 to 1.30. Meanwhile, the gas release kinetic analysis demonstrated the E(H2) made the minimum (88.66 kJ?mol- 1) when the torrefaction temperature was 270 ?C. All these indicate the torrefaction has a positive effect on the BCLG process.
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