Fractional pyrolysis of biomass for high-valued products

TY - JOUR

T1 - Fractional pyrolysis of biomass for high-valued products

AU - Agblevor, F. A.

AU - Besler-Guran, S.

PY - 2002/3

Y1 - 2002/3

N2 - The fractional catalytic conversion of the carbohydrates components of hybrid poplar wood into gaseous products was studied as well as the depolymerization of lignin into phenol, cresols, and catechols. About 90% by weight of the gaseous products was CO and CO2 and the rest was a mixture of hydrocarbon. Butene was the most abundant hydrocarbon and in some cases constituted 30% of the total hydrocarbon products. The elemental composition of the liquids had high carbon (71%) and relatively low oxygen content (21%) compared to non-catalytic pyrolysis oils. The CO and CO2 concentrations varied with time during the catalytic pyrolysis. The CO/CO2 ratio decreased with time and approached the value for non-catalytic pyrolysis. Under post-pyrolysis catalysis conditions, biomass feedstock to produced very high coke yields, which rapidly deactivate the catalysts. In the catalytic pyrolysis where the catalysts and the biomass feed were contacted was still active after 3 hr on steam and the product slate was quite different from that reported for post-pyrolysis catalysis. The molecular mass distribution of fractional catalytic pyrolysis process were ∼ 50% of that obtained for phenol/neutral fraction in a conventional pyrolysis and is considerable demethylation and demethoxylation reactions.

AB - The fractional catalytic conversion of the carbohydrates components of hybrid poplar wood into gaseous products was studied as well as the depolymerization of lignin into phenol, cresols, and catechols. About 90% by weight of the gaseous products was CO and CO2 and the rest was a mixture of hydrocarbon. Butene was the most abundant hydrocarbon and in some cases constituted 30% of the total hydrocarbon products. The elemental composition of the liquids had high carbon (71%) and relatively low oxygen content (21%) compared to non-catalytic pyrolysis oils. The CO and CO2 concentrations varied with time during the catalytic pyrolysis. The CO/CO2 ratio decreased with time and approached the value for non-catalytic pyrolysis. Under post-pyrolysis catalysis conditions, biomass feedstock to produced very high coke yields, which rapidly deactivate the catalysts. In the catalytic pyrolysis where the catalysts and the biomass feed were contacted was still active after 3 hr on steam and the product slate was quite different from that reported for post-pyrolysis catalysis. The molecular mass distribution of fractional catalytic pyrolysis process were ∼ 50% of that obtained for phenol/neutral fraction in a conventional pyrolysis and is considerable demethylation and demethoxylation reactions.

UR - https://www.scopus.com/pages/publications/0344551843

UR - https://www.scopus.com/pages/publications/0344551843#tab=citedBy

M3 - Conference article

SN - 0569-3772

VL - 47

SP - 374

EP - 375

JO - ACS Division of Fuel Chemistry, Preprints

JF - ACS Division of Fuel Chemistry, Preprints

IS - 1

T2 - 224th ACS National Meeting

Y2 - 7 April 2002 through 11 April 2002

ER -