Hydrodeoxygenation of pyrolysis oil in a microreactor

Joshi, Narendra; Lawal, Adeniyi

doi:10.1016/j.ces.2012.01.052

Cited by 79 publications

(53 citation statements)

References 25 publications

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“…Due to the strong shear force generated by centrifugal forces in the CCCS, liquid-liquid mixing is enhanced considerably, accelerating reactions with fast kinetics that are limited by mass transfer. [134] Typically, microreactors have been used for single liquid phase and biphasic (gas-liquid or liquid-liquid) catalytic transformation of biomass derivatives to valuable products using homogeneous or heterogeneous catalysts (e. g., the (biphasic) synthesis of furans from sugars, [135][136][137][138][139][140][141][142][143][144] (aerobic) oxidation, [144][145][146][147][148][149] and hydrogenation of biomass derivatives [144,[150][151][152][153] ). [126] Another intensified reactor configuration for multiphase (gasliquid or liquid-liquid) catalytic biomass transformation is the spinning disc reactor, consisting of a rotating disc around which fluids are fed.…”

Section: Process Intensification For Biomass Conversionmentioning

confidence: 99%

“…[2] Furthermore, it has a high oxygen content (40-50 wt%) giving it a low heating value and making it unattractive to use directly as a biofuel. [152] Commercially available catalyst particles were modified by grinding and sieving to reduce particle size and facilitate their incorporation into the microreactor by gravitational filling. HDO reaction performance is often expressed in the extent of HDO (amount of oxygen removed) and space time consumption (STC) of H 2 (amount of H 2 consumed per reaction time and catalyst weight).…”

Section: Hydrodeoxygenation Of Pyrolysis Oil To Biofuelsmentioning

confidence: 99%

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Catalytic Transformation of Biomass Derivatives to Value‐Added Chemicals and Fuels in Continuous Flow Microreactors

2019

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Biomass as a renewable and abundantly available carbon source is a promising alternative to fossil resources for the production of chemicals and fuels. The development of biobased chemistry, along with catalyst design, has received much research attention over recent years. However, dedicated reactor concepts for the conversion of biomass and its derivatives are a relatively new research field. Continuous flow microreactors are a promising tool for process intensification, especially for reactions in multiphase systems. In this work, the potential of microreactors for the catalytic conversion of biomass derivatives to value-added chemicals and fuels is critically reviewed. Emphases are laid on the biphasic synthesis of furans from sugars, oxidation and hydrogenation of biomass derivatives. Microreactor processing has been shown capable of improving the efficiency of many biobased reactions, due to the transport intensification and a fine control over the process. Microreactors are expected to contribute in accelerating the technological development of biomass conversion and have a promising potential for industrial application in this area.

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Section: Process Intensification For Biomass Conversionmentioning

confidence: 99%

Section: Hydrodeoxygenation Of Pyrolysis Oil To Biofuelsmentioning

confidence: 99%

Catalytic Transformation of Biomass Derivatives to Value‐Added Chemicals and Fuels in Continuous Flow Microreactors

2019

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“…Catalytic cracking is a method that involves the addition of a catalyst to the pyrolysis process. This process has received a lot of attention because of the significant increase in hydrocarbon fuel obtained [7]. Zhang et al [5] have determined that catalytic cracking is a cheaper method than hydrodeoxygenation, but the results do not seem promising because of high coke production during the process (8-25 wt %) and the poor quality of the fuels obtained.…”

Section: Introductionmentioning

confidence: 99%

Pyrolysis of mixtures of palm shell and polystyrene: An optional method to produce a high‐grade of pyrolysis oil

Abnisa

Daud

Sahu

2013

Env Prog and Sustain Energy

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This research attempted to demonstrate a simple method to produce high‐grade pyrolysis oil by maximizing the use of biomass wastes. In this study, the results of pyrolysis of palm shell alone are compared with pyrolysis of palm shell/polystyrene mixtures (1:1 weight ratios). Pyrolysis was carried out in a fixed‐bed reactor under the following conditions: a temperature of 500°C, a nitrogen flow rate of 2 L/min, and reaction time of 60 min. The results showed that the final oil yield of palm shell pyrolysis was about 46.13 wt %. By mixing the palm shell with polystyrene, the yield of oil increased to about 61.63%. In these experiments, the high heating value was low (11.94 MJ/kg) for oil from pyrolysis of palm shell. By contrast, the high heating value was a high 38.01 MJ/kg for oil from pyrolysis of material mixtures. In addition, by using this method, more waste matter can be consumed as raw material for pyrolysis oil production, which also benefits waste management and energy security in Malaysia. © 2013 American Institute of Chemical Engineers Environ Prog, 33: 1026–1033, 2014

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“…Several nickel-based catalysts were used to lower the oxygen content and increase the H/C ratio. [38][39][40] Although no product compositions were reported, HDO of these pyrolysis oils over nickel catalysts has been shown to result in the formation of mainly ring-hydrogenated products. 41 For the production of BTX and phenol from lignin a two-step process is desired, however, which combines a high depolymerization activity with a HDO catalyst that does not show ring-hydrogenation activity.…”

Section: Reaction Optimizationmentioning

confidence: 99%

Liquid-phase reforming and hydrodeoxygenation as a two-step route to aromatics from lignin

2013

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A two-step approach to the conversion of organosolv, kraft and sugarcane bagasse lignin to monoaromatic compounds of low oxygen content is presented. The first step consists of lignin depolymerization in a liquid phase reforming (LPR) reaction over a 1 wt% Pt/γ-Al 2 O 3 catalyst at 225°C in alkaline ethanolwater. The first LPR step resulted in a decrease in lignin molecular weight of 32%, 57% and 27% for organosolv, kraft and bagasse lignin, respectively. GC analysis of the depolymerized lignin reaction mixture furthermore showed the formation of alkylated phenol, guaiacol and syringol-type products in 11%, 9% and 5% yields from organosolv, kraft and bagasse lignin, respectively. The lignin-oil that was isolated by extraction of the ethanol-water solution was subjected to a subsequent hydrodeoxygenation (HDO) reaction in the second conversion step. HDO of the lignin-oil was performed in dodecane at 300°C under 50 bar hydrogen pressure over CoMo/Al 2 O 3 and Mo 2 C/CNF catalysts. GC analysis of the product mixture obtained after the two-step LPR-HDO process revealed the formation of, amongst others, benzene, toluene, xylenes and ethylmethylbenzenes. Of the total observed monomeric products (9%), 25% consisted of these oxygen-free products. Notably, such products cannot be obtained by direct HDO of lignin. HDO of the lignin-oil at 350°C resulted in the conversion of all tris-oxygenated products, with 57% of the observed monomeric products now identified as mono-oxygenated phenolics.

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Hydrodeoxygenation of pyrolysis oil in a microreactor

Cited by 79 publications

References 25 publications

Catalytic Transformation of Biomass Derivatives to Value‐Added Chemicals and Fuels in Continuous Flow Microreactors

Catalytic Transformation of Biomass Derivatives to Value‐Added Chemicals and Fuels in Continuous Flow Microreactors

Pyrolysis of mixtures of palm shell and polystyrene: An optional method to produce a high‐grade of pyrolysis oil

Liquid-phase reforming and hydrodeoxygenation as a two-step route to aromatics from lignin

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