Production of low-oxygen bio-oil via ex situ catalytic fast pyrolysis and hydrotreating

Iisa, Kristiina; French, Richard J.; Orton, Kellene A.; Dutta, Abhijit; Schaidle, Joshua A.

doi:10.1016/j.fuel.2017.06.098

Cited by 90 publications

(102 citation statements)

References 44 publications

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“…The water content in the samples was determined by Karl Fischer method (ASTM D6869). Density, total acid number and saponification number were determined using standardized methods 47 .…”

Section: Experimental Partmentioning

confidence: 99%

Catalytic hydrotreating of bio-oil and evaluation of main noxious emissions of gaseous phase

Doukeh

Bomboş

Bombos

et al. 2021

Sci Rep

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Bio-oil produced from biomass pyrolysis has the potential to become an alternative renewable fuel. However due to the high content of oxygenated compounds is unsuitable as transportation fuel. The objective of this work is to evaluate the catalytic activity of CoMo /γ-Al2O3-HMS in the hydrotreating process of biomass pyrolysis bio-oil. The prepared catalyst was characterized by different techniques (X-ray diffraction (XRD), transmission electron microscopy (TEM), Fourier transform infrared spectroscopy (FT-IR) and X-ray photoelectron spectroscopy (XPS)) analysis. The experiments were carried out in a flow fixed-bed reactor at the temperature range of 250–320 °C, pressure between 20–40 bar, and LHSV of 3 h-1. The results showed that at mild conditions of 320 °C and 40 bar, the catalyst is very active in the hydrotreating process leading to a decrease of total acid number of hydrotreated bio-oil with almost 89% and bio-oil conversion of 87.23%. In addition, in order to evaluate the harmful emissions resulted from combustion of gaseous phase obtained in the hydrotreating process a chemical modelling algorithm was developed.

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“…The water content in the samples was determined by Karl Fischer method (ASTM D6869). Density, total acid number and saponification number were determined using standardized methods 47 .…”

Section: Experimental Partmentioning

confidence: 99%

Catalytic hydrotreating of bio-oil and evaluation of main noxious emissions of gaseous phase

Doukeh

Bomboş

Bombos

et al. 2021

Sci Rep

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“…A plug-flow assumption was applied by the model in the membrane lumen, and the pressure drop was calculated by the Hagen-Poiseuille equation. The upwind finite difference method was applied to solve Equation (9). The validation of the models was investigated and discussed in previous works [23][24][25][26][27].…”

Section: Modeling Of Membrane Gas Separationmentioning

confidence: 99%

“…Hydrotreatment is one of the most efficient methods to modify the molecular structure of pyrolytic oil [7,8]. Through hydro-processing, impurities such as sulfur, oxygen and nitrogen could be removed [9]; proper hydrotreatment could also make pyrolytic oil lighter by converting heavy components, such as tars and heavy non-volatiles, into lighter oil cuts, to raise the quality of oils and enable them to be utilized as chemical materials [10]. Hydrogen is one of the key reactants in the hydrotreatment process, most of which was produced through reforming in a plant [11].…”

Section: Introductionmentioning

confidence: 99%

Conceptual Design of Pyrolytic Oil Upgrading Process Enhanced by Membrane-Integrated Hydrogen Production System

et al. 2019

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Hydrotreatment is an efficient method for pyrolytic oil upgrading; however, the trade-off between the operational cost on hydrogen consumption and process profit remains the major challenge for the process designs. In this study, an integrated process of steam methane reforming and pyrolytic oil hydrotreating with gas separation system was proposed conceptually. The integrated process utilized steam methane reformer to produce raw syngas without further water–gas-shifting; with the aid of a membrane unit, the hydrogen concentration in the syngas was adjusted, which substituted the water–gas-shift reactor and improved the performance of hydrotreater on both conversion and hydrogen consumption. A simulation framework for unit operations was developed for process designs through which the dissipated flow in the packed-bed reactor, along with membrane gas separation unit were modeled and calculated in the commercial process simulator. The evaluation results showed that, the proposed process could achieve 63.7% conversion with 2.0 wt% hydrogen consumption; the evaluations of economics showed that the proposed process could achieve 70% higher net profit compared to the conventional plant, indicating the potentials of the integrated pyrolytic oil upgrading process.

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“…For the CFP process, increasing the selectivity towards specific oxygenated compounds via catalytic upgrading and effective separations are two prerequisites for the production of oxygenated chemicals. Separation of individual chemical compounds is challenging because of the often-small content of each of the species in a soup of numerous compounds [12,13]. Phase behavior and related operations need to be strategically employed for the efficient separation of desired species.…”

Section: Introductionmentioning

confidence: 99%

Evaluation of experimental and predicted vapor-liquid equilibrium data for systems relevant to biomass fast pyrolysis and catalytic upgrading

Paulechka¹,

Diky²,

Dutta³

2021

Self Cite

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The experimental vapor-liquid equilibrium (VLE) data for the binaries relevant to the catalytic fast pyrolysis of biomass have been collected and analyzed using the NIST-COSMO-SAC and NIST-modified UNIFAC models. The existing inconsistencies in the experimental data and the predicted values are discussed. For VLE with furan derivatives, PTxy data are normally reported, and the predicted values are in good agreement with them. For phenolic compounds, the gas phase compositions are available for only 36 % of the points, most results originate from a few laboratories, and each system has been typically studied in a single laboratory. The binaries are identified where more experimental VLE data are required to evaluate quality of the existing experimental and predicted results.

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Production of low-oxygen bio-oil via ex situ catalytic fast pyrolysis and hydrotreating

Cited by 90 publications

References 44 publications

Catalytic hydrotreating of bio-oil and evaluation of main noxious emissions of gaseous phase

Catalytic hydrotreating of bio-oil and evaluation of main noxious emissions of gaseous phase

Conceptual Design of Pyrolytic Oil Upgrading Process Enhanced by Membrane-Integrated Hydrogen Production System

Evaluation of experimental and predicted vapor-liquid equilibrium data for systems relevant to biomass fast pyrolysis and catalytic upgrading

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