Upgrading of aspen poplar wood oil over HZSM‐5 zeolite catalyst

Abstract

Thermally fractionated components of an oil prepared by the liquefaction of aspen poplar wood have been upgraded using a HZSM-5 zeolite catalyst to yield products rich in benzene, toluene, xylenes and higher molecular weight aromatics. The effect of reactor temperatures on the relative abundance of these products has been studied.On a procCdi a la valorsiation de composCs obtenus par fractionnement thermique d'une huile produite par liquefaction du bois de peuplier faux-tremble, en employant pour catalyseur la ziolithe HZSM-5; on a obtenu des produits riches en benzene, toldne, xylenes et des produits aromatiques de poids molCculaire plus ClevC. On a etudiC l'effet de la ternpkrature des rkacteurs sur I'abondance relative de ces produits.

Catalytic upgrading of biomass‐derived oils to transportation fuels and chemicals

“…This is a significant process improvement where treatment is not restricted to low boiling fractions of the biooil (Mathews et al, 1985) and the pitch conversions are higher than those obtained by Chantal et al (1984). This is a significant process improvement where treatment is not restricted to low boiling fractions of the biooil (Mathews et al, 1985) and the pitch conversions are higher than those obtained by Chantal et al (1984).…”

“…Mathews et al (1985) passed different boiling point fractions of the bio-oil over HZSM-5 using H2 as carrier gas. In some cases, hydrogen or helium was used as a carrier gas while in others, hydrogen donor solvents such-as telrXin%Ge utilized to minimize the coking problems resulting from the poor stability of these oils at high temperatures.…”

Potential hydrogen and non-condensable gases production from biomass pyrolysis: Insights into the process variables

“…For example, rice husks at 550 1C yield 25.4 wt% gas, but by applying catalysts a tremendous increase (22.2-41 wt% gas) in the trend of gas formation could be observed from 400 to 600 1C. Aside from such characteristics, Mathews et al [205] showed that the formation of gases such as C 3 was reduced when the reactor temperature increased. On the other hand, the Al-MCM-41 catalysts reduced carbonyls and acid formation during biomass-based fast pyrolysis vapors, when subsequently it also demonstrated formation of hydrocarbons, phenols and poly-aromatic hydrocarbons in a fixed bed [206].…”

Novel Fast Pyrolysis/Catalytic Technology for the Production of Stable Upgraded Liquids

“…The higher gas yields reported for the 2-stage reactor were probably due to extensive cracking of the pyrolysis vapors since the average temperature in the second section of the 2-stage reactor was slightly higher than what was experienced in the 1-stage reactor. Studies on zeolite catalytic cracking have shown generally that higher temperature increases the yield of the gas products due to the occurrence of secondary cracking reactions [26,[60][61][62][63][64]. From the results, the most widely influenced gases were H 2 and C 4 hydrocarbons.…”