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    On the effects of CO2 atmosphere in the pyrolysis of Salicornia bigelovii

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    Embargo End Date:
    2023-01-01
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    Embargo End Date:
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    Type
    Article
    Authors
    Aljaziri, Jinan cc
    Gautam, Ribhu cc
    Alturkistani, Sultan H. cc
    Fiene, Gabriele
    Tester, Mark A. cc
    Sarathy, Mani cc
    KAUST Department
    Chemical Engineering Program
    Physical Science and Engineering (PSE) Division
    Clean Combustion Research Center
    Biological and Environmental Science and Engineering (BESE) Division
    Plant Science
    Center for Desert Agriculture
    Date
    2022-01
    Embargo End Date
    2023-01-01
    Submitted Date
    2021-10-29
    Permanent link to this record
    http://hdl.handle.net/10754/674931
    
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    Abstract
    This study focuses on understanding the effects of a CO$_2$ atmosphere on the pyrolysis of $\textit{Salicornia bigelovii}$ by performing a detailed kinetic analysis and investigating the pyrolysis products. In comparison to N$_2$ pyrolysis, CO$_2$ pyrolysis increased the amounts of acids, phenols, amines/amides and N-aromatics in the bio-oil. Biochar showed a 6.5% increase in carbon and a 5.8% decrease in oxygen due to the presence of CO$_2$ in the pyrolysis atmosphere. CO$_2$ also inhibited the volatilization of certain functional groups, such as phenols, tertiary alcohols and aromatics from the biochar, and the surface area of the biochar was 12 times larger than pyrolysis in N$_2$ atmosphere. Pyrolysis in CO$_2$ led to an increase in the average apparent activation energy from 146.5 kJ mol$^{−1}$ in N$_2$ to 163.4 kJ mol$^{−1}$. The kinetic equation was found to conform to a three dimensional diffusion mechanism. Finally, the pre-exponential factor was determined for each reaction.
    Citation
    Aljaziri, J., Gautam, R., Alturkistani, S., Fiene, G. M., Tester, M., & Sarathy, S. M. (2022). On the effects of CO2 atmosphere in the pyrolysis of Salicornia bigelovii. Bioresource Technology Reports, 100950. doi:10.1016/j.biteb.2022.100950
    Sponsors
    Dinara Utarbayeva and Hongwei Ren from KAUST are acknowledged for their help in growing plants and threshing the seeds. This work was sponsored by King Abdullah University of Science and Technology (KAUST). The authors thank the Clean Combustion Research Center (CCRC) at KAUST for funding and allowing access to their experimental facilities. The authors would also like to thank the Core Labs at KAUST for access to their instruments.
    Publisher
    Elsevier BV
    Journal
    Bioresource Technology Reports
    DOI
    10.1016/j.biteb.2022.100950
    Additional Links
    https://linkinghub.elsevier.com/retrieve/pii/S2589014X2200007X
    ae974a485f413a2113503eed53cd6c53
    10.1016/j.biteb.2022.100950
    Scopus Count
    Collections
    Articles; Biological and Environmental Science and Engineering (BESE) Division; Physical Science and Engineering (PSE) Division; Chemical Engineering Program; Clean Combustion Research Center; Center for Desert Agriculture

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