Pyrolysis of pre-treated tannins obtained from radiata pine bark

CASE, P.; BIZAMA, C.; SEGURA, C.; WHEELER, M.C.; BERG, A.; DESISTO, W.:
Journal of Analytical and Applied Pyrolysis 107 (2014) 250-255.

DOI: 10.1016/j.jaap.2014.03.009

Abstract

Water soluble and insoluble fractions of tannins obtained from radiata pine bark were pyrolyzed at the bench-scale in a continuous entrained flow pyrolysis reactor at 500 °C. The tannin fractions were pre-treated with both calcium hydroxide and calcium formate to assist in continuous feeding and promote deoxygenation during pyrolysis. Oil yields and qualitative GC-MS were used to characterize the oil products. Pre-treatment assisted in continuous feeding, ameliorating some issues associated with the thermoplastic properties of tannins. A comparison of the pyrolysis of tannins with and without pretreatment is presented.

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