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Effect of alkali metal on pyrolysis characteristics and pyrolysis gas products of Triarrhena lutarioriparia

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Abstract

This paper presents a comprehensive study that effect of acid washing conditions and alkali metal impregnation solution on the pyrolysis characteristics and gas products of Triarrhena lutarioriparia (TL) studied by the thermogravimetric-Fourier transform infrared spectrometry (TG-FTIR). The results showed that the HNO3 washing significantly reduced the contents of K+ and Na+ in TL. The highest removal rates for K+ and Na+ were 98.46% and 98.32%, respectively. When the HNO3 washing condition was 5%, 25 °C, and 2 h, the benefits of alkali metal removal and pyrolysis of Triarrhena lutarioriparia were the best. Immersion of TL with KCl and NaCl solutions decreased the pyrolysis temperature of TL. The order of char yield was KCl impregnation sample > NaCl impregnation sample > original sample > HNO3 washing sample. The catalytic effect of alkali metals improved with increasing the concentration of K+ and Na+ in the impregnation solution. K+ and Na+ impregnation increased the peak absorbance and precipitation of CO2 and CO and inhibited the generation of CH4, C = O and C–O–C.

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The data that support the findings of this study are available on request from the corresponding author. The data are not publicly available due to privacy or ethical restrictions.

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Acknowledgements

The research described in this paper was financially supported by the Natural Science Foundation of China for Young Scholars (No.51706022, No.52006016), the Natural Science Foundation of Hunan Province of China (No. 2019JJ40299), the Education Department Foundation of Hunan Province of China (No. 20A004, No. 20B041), Natural Science Foundation of Changsha(No.kq2202202 ), and the Innovative Team of Key Technologies of Energy Conservation, Emission Reduction and Intelligent Control for Power-Generating Equipment and System at CSUST.

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Authors and Affiliations

  1. School of Energy & Power Engineering, Changsha University of Science & Technology, Changsha, 410114, China

    Zhen Zhou, **ong Gao, Hong Tian, Liyang Jiang & Shan Cheng

  2. Guangdong Shaoneng Group Co., Ltd, Shaoguan, 512000, Guangdong Province, China

    Ruilong **ang

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  1. Zhen Zhou
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  2. **ong Gao
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  3. Hong Tian
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Contributions

ZZ: validation, investigation, writing — original draft; XG: conceptualization, methodology, validation, investigation, writing — original draft; HT: writing — review and editing, project administration, resources; LJ: validation, investigation, writing — original draft; SC: funding acquisition, conceptualization; RX: conceptualization, methodology, writing — original draft.

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Correspondence to Hong Tian.

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Zhou, Z., Gao, X., Tian, H. et al. Effect of alkali metal on pyrolysis characteristics and pyrolysis gas products of Triarrhena lutarioriparia. Biomass Conv. Bioref. (2022). https://doi.org/10.1007/s13399-022-03042-7

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