Enhanced production of phenolics and aromatics from raw bio-oil using HZSM-5 zeolite additives for PtPd/C and NiW/C catalysts

Hita, Idoia; Cordero-Lanzac, Tomás; García-Mateos, Francisco J.; Azkoiti, Miren J.; Rodríguez-Mirasol, José; Cordero, Tomás; Bilbao, Javier

doi:10.1016/j.apcatb.2019.118112

Cited by 49 publications

(53 citation statements)

References 52 publications

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“…However, this task remains highly challenging, considering the complexity of the reaction medium and the great amount of reaction synergies taking place. 30 In previous works on the HDO of raw bio-oil, 16,31 we determined that the process goes through an initial period of fast coke deposition at low times on stream (1-4 h), which causes a signicant activity decay, and aer which a subsequent pseudosteady catalytic activity state was attained.…”

Section: Introductionmentioning

confidence: 99%

Dynamics of carbon formation during the catalytic hydrodeoxygenation of raw bio-oil

Hita

Cordero-Lanzac

Bonura

et al. 2020

Sustainable Energy Fuels

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Section: Introductionmentioning

confidence: 99%

Dynamics of carbon formation during the catalytic hydrodeoxygenation of raw bio-oil

Hita

Cordero-Lanzac

Bonura

et al. 2020

Sustainable Energy Fuels

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“…In this case, two temperatures (305 • C and 350 • C) were selected to obtain HTL oils with distinct characteristics in terms of polymerization and functionalization degree, oxygen content, and monomer content. Experimental conditions for the HDO reaction (100 bar initial H 2 pressure, 375-450 • C) are in line with those for the HDO of typical lignocellulosic biomass and technical lignins [20,[23][24][25][26].…”

Section: Introductionmentioning

confidence: 88%

“…alcohols, formic acid). Examples of catalysts are sulfided NiMo and CoMo catalyst formulations and noble metals on supports, of which the latter have shown to be more active and present higher stability in a watercontaining reaction medium [23][24][25][26].…”

Section: Introductionmentioning

confidence: 99%

Hydrothermal liquefaction versus catalytic hydrodeoxygenation of a bioethanol production stillage residue to platform chemicals: A comparative study

Hita

Ghoreishi

Santos

et al. 2021

Fuel Processing Technology

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Biobased chemicals like phenols and aromatics are preferably produced from cheap biomass waste streams. In this work, we have explored the potential of a eucalyptus-derived second generation bioethanol production stillage (BPS) residue for this purpose. A comparative study between a hydrothermal liquefaction (HTL) and a catalytic hydrodeoxygenation (HDO) step, as well as a 2-step HTL-HDO approach is reported, targeting at valueadded low molecular weight platform chemicals (mainly alkylphenols and aromatics). HDO was observed to be a more suitable strategy than HTL for the production of organic oils enriched in valuable monomers. The direct HDO of the BPS using a commercial Ru/C catalyst at 450 • C and 100 bar H 2 pressure led to an organic product oil (30.7 wt%) with a total monomer yield of 25.2 wt% (13.2 wt% of alkylphenolic+aromatics), compared to a 53.2 wt% of a product oil with 10.0 wt% monomers for the HTL step (305 • C). A 2-step HTL-HDO strategy was compared with the direct HDO approach. Comparable alkylphenolic+aromatic yields were obtained through this approach based on initial BPS intake (13.2 wt% vs 12.3 wt% for the direct HDO and HTL-HDO approach, respectively). Lower HTL temperatures (305 • C) for the first step are preferred to prevent over hydrogenation in the subsequent HDO step. As such, HTL appears a suitable pre-treatment for BPS and can (i) solve the issues related to the feeding of solids in pressurized continuous reactors for HDO and (ii) prevent coke formation during the HDO step, thus improving catalyst stability and durability.

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“…For example, fast pyrolysis provides a flexible platform to produce biofuels and bioproducts because of its ability to decompose biomass to organic fractions with distinct characteristics (12). Previous studies have shown that these fractions can be upgraded into gasoline, ethanol, sugars (13)(14)(15), biocement (16), bioasphalt (17), lignocoal (18), aromatics (19), and other commodity and specialty chemicals. Bio-oil is the primary product from fast pyrolysis, and it contains hundreds of organic compounds (20).…”

Section: Abstract Fast Pyrolysis Hydroprocessing Anaerobic Digestimentioning

confidence: 99%

Application of Hydroprocessing, Fermentation, and Anaerobic Digestion in a Carbon-Negative Pyrolysis Refinery

Ganguly

Martin

Brown

et al. 2020

ACS Sustainable Chem. Eng.

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This study investigates the economic and environmental benefits of integrating hydroprocessing, fermentation, and anaerobic digestion into a pyrolysis refinery. Two scenarios were developed for upgrading and/or utilizing the primary products of pyrolysis (bio-oil, gas, and char). The first (hydroprocessing) scenario hydroprocesses whole bio-oil into gasoline and diesel. The second (fractionation) scenario fractionates bio-oil into sugars for fermentation to cellulosic ethanol and residual phenolic oil as the primary product. Both scenarios use the gaseous product of pyrolysis for process heat in the plant and employ biochar to enhance anaerobic digestion of manure for power generation. The fast pyrolysis plant processes 2000 ton/day of corn stover while the anaerobic digester employs 430 ton/day of manure to generate power. The hydroprocessing scenario produces gasoline at a minimum fuel-selling price (MFSP) of $2.77 per gallons of gasoline while the fractionation scenario produces ethanol and phenolic oils (diesel) as a transportation fuel for $1.2 per gallon ($1.41 per GGE). Sensitivity analysis indicates that the MFSP for both scenarios is highly sensitive to the fixed capital cost. Fixed capital costs for the hydroprocessing and fractionation scenarios were estimated to be $643 and $288 million, respectively. Fuel production rates for the hydroprocessing and fractionation scenarios are 60.5 and 16 million GGE per year, respectively. Life cycle greenhouse gas emissions were calculated as −9.6 and −16.6 g CO2,eq per MJ for the hydroprocessing and fractionation scenarios, respectively. LCA emissions are sensitive to byproduct credits derived from biochar sequestration and power generation. This study shows that both systems produce transportation fuels at competitive market prices with an additional reduction in atmospheric CO2 levels compared to fossil fuel sources.

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Enhanced production of phenolics and aromatics from raw bio-oil using HZSM-5 zeolite additives for PtPd/C and NiW/C catalysts

Cited by 49 publications

References 52 publications

Dynamics of carbon formation during the catalytic hydrodeoxygenation of raw bio-oil

Dynamics of carbon formation during the catalytic hydrodeoxygenation of raw bio-oil

Hydrothermal liquefaction versus catalytic hydrodeoxygenation of a bioethanol production stillage residue to platform chemicals: A comparative study

Application of Hydroprocessing, Fermentation, and Anaerobic Digestion in a Carbon-Negative Pyrolysis Refinery

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