Thermal plasma gasification of organic waste stream coupled with CO2-sorption enhanced reforming employing different sorbents for enhanced hydrogen production
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2022-01-05
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SIKARWAR, V. S.
PEELA, N. R.
VUPPALADADIYAM, A. K.
FERREIRA, N. L.
MASLANI, A.
TOMAR, R.
POHORELY, M.
MEERS, E.
JEREMIAS, M.
PEELA, N. R.
VUPPALADADIYAM, A. K.
FERREIRA, N. L.
MASLANI, A.
TOMAR, R.
POHORELY, M.
MEERS, E.
JEREMIAS, M.
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RSC Advances
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SIKARWAR, V. S.; PEELA, N. R.; VUPPALADADIYAM, A. K.; FERREIRA, N. L.; MASLANI, A.; TOMAR, R.; POHORELY, M.; MEERS, E.;JEREMIAS, M. Thermal plasma gasification of organic waste stream coupled with CO2-sorption enhanced reforming employing different sorbents for enhanced hydrogen production. RSC Advances, v. 12, n. 10, p. 6122-6132, Jan. 2022.
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© 2022 The Author(s).In the past few years, rising concerns vis-a-vis global climate change and clean energy demand have brought worldwide attention to developing the 'biomass/organic waste-to-energy' concept as a zeroemission, environment-friendly and sustainable pathway to simultaneously quench the global energy thirst and process diverse biomass/organic waste streams. Bioenergy with carbon capture and storage (BECCS) can be an influential technological route to curb climate change to a significant extent by preventing CO2 discharge. One of the pathways to realize BECCS is via in situ CO2-sorption coupled with a thermal plasma gasification process. In this study, an equilibrium model is developed using RDF as a model compound for plasma assisted CO2-sorption enhanced gasification to evaluate the viability of the proposed process in producing H2 rich syngas. Three different classes of sorbents are investigated namely, a high temperature sorbent (CaO), an intermediate temperature sorbent (Li4SiO4) and a low temperature sorbent (MgO). The distribution of gas species, H2 yield, dry gas yield and LHV are deduced with the varying gasification temperature, reforming temperature, steam-to-feedstock ratio and sorbentto- feedstock for all three sorbents. Moreover, optimal values of different process variables are predicted. Maximum H2 is noted to be produced at 550 °C for CaO (79 vol%), 500 °C for MgO (29 vol%) and 700 °C (55 vol%) for Li4SiO4 whereas the optimal SOR/F ratios are found to be 1.5 for CaO, 1.0 for MgO and 2.5 for Li4SiO4. The results obtained in the study are promising to employ plasma assisted CO2-sorption enhanced gasification as an efficacious pathway to produce clean energy and thus achieve carbon neutrality.