Valorization of cotton stalks by fast pyrolysis and fixed bed air gasification for syngas production as precursor of second generation biofuels and sustainable agriculture
2009
Kantarelis, E. | Zabaniotou, A.
In the present study, the potential of cotton stalks utilization for H₂ and syngas production with respect to CO₂ mitigation, by means of thermochemical conversion (pyrolysis and gasification) was investigated. Pyrolysis was conducted at temperature range of 400-760°C and the main parametric study concerned the effect of temperature on pyrolysis product distribution. Atmospheric pressure, air gasification at 750-950°C for various λ (0.02-0.07) was also studied. Experimental results showed that high temperature favors gas production in both processes; while low λ gasification gave high gas yield. Syngas (CO and H₂) was increased with temperature, while CO₂ followed an opposite trend. By pyrolysis, higher H₂ concentration in the produced gas (~39% v/v) was achieved and at the same time lower amounts of CO₂ produced, compared to air gasification.
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