Upgrading of bio-oil into advanced biofuels and chemicals. Part II. Importance of holdup of heavy species during the hydrotreatment of bio-oil in a continuous packed-bed catalytic reactor
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This study has investigated the observed product distribution as a function of temperature and liquid hourly space velocity (LHSV) from the continuous hydrotreatment of pyrolysis bio-oil in a packed-bed catalytic reactor using a Pd/C catalyst. Our results show that, at a constant overall LHSV value, the time required to achieve a steady state formation rate varies widely among the various species in the raw bio-oil and hydrotreated product. Due to the complexity of bio-oil composition, LHSV is not an accurate parameter to evaluate the residence time of various species in a continuous catalytic reactor. The holdup of heavy species in the catalyst must have occupied some active sites while the heavy compounds were slowly hydrogenated. This caused the active sites to be unavailable for other reactions during the continuous hydrotreatment.
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Gholizadeh, M.; Gunawan, Richard; Hu, Xue; Kadarwati, S.; Westerhof, R.; Chaiwat, W.; Hasan, M.; Li, Chun-Zhu (2016)© 2016 Elsevier B.V. This paper reports the effects of hydrogen and bio-oil inlet temperature on the coke formation and product distribution during the hydrotreatment of bio-oil. A bench scale continuous hydrotreatment ...
Different reaction behaviours of the light and heavy components of bio-oil during the hydrotreatment in a continuous pack-bed reactorGholizadeh, M.; Gunawan, Richard; Hu, Xun; Hasan, Md Mahmudul; Kersten, S.; Westerhof, R.; Chaitwat, W.; Li, Chun-Zhu (2016)This study aims to investigate the hydrotreatment of bio-oil in a continuous packed-bed reactor at around 375°C and 70 bar. The bio-oil was produced from the grinding pyrolysis of mallee wood in a grinding pyrolysis pilot ...
Effects of temperature on the hydrotreatment behaviour of pyrolysis bio-oil and coke formation in a continuous hydrotreatment reactorGholizadeh, M.; Gunawan, R.; Hu, X.; De Miguel Mercader, F.; Westerhof, R.; Chaitwat, W.; Hasan, M.; Mourant, D.; Li, Chun-Zhu (2016)In this study, we investigated the effects of temperature on the hydrotreatment behaviour of bio-oil from the pyrolysis of mallee wood with a special focus on coke formation. The experiments were carried out in a continuous ...