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Stabilized Ni-based catalysts for bio-oil hydrotreatment: Reactivity studies using guaiacol

Paper ID Volume ID Publish Year Pages File Format Full-Text
54384 47008 2014 11 PDF Available
Title
Stabilized Ni-based catalysts for bio-oil hydrotreatment: Reactivity studies using guaiacol
Abstract

•P-/Mo-containing agents were used to modify sol–gel catalyst NiCu/SiO2–ZrO2•The modified catalysts were tested in hydrodeoxygenation (HDO) of guaiacol•Modification resulted in the significant improvement of catalysts bulk crushing strength•The catalysts stability to corrosion in acidic medium has been improved as well

The development of catalysts possessing high activity and high stability in the catalytic hydrotreatment of pyrolysis oils (bio-oil) is of great interest. NiCu bimetallic catalytic systems are very attractive for use in hydrotreatment process due to their low price and high activity in hydrogenation, hydrodeoxygenation and hydrocracking reactions. In the present work P-/Mo-containing agents were used to modify bimetallic catalytic system NiCu/SiO2–ZrO2 to improve its mechanical strength and stability in acidic medium. The modified catalysts were tested in hydrodeoxygenation (HDO) of guaiacol—a well-known model compound of bio-oil. HDO process has been carried out in an autoclave at 320 °С, 17 MPa initial hydrogen pressure, reaction time 1 h. It was shown that phosphorus and molybdenum addition to the catalysts composition results in the decrease of guaiacol conversion and deoxygenation degree. The yield of undesirable gaseous reaction products (mainly methane) and coking of the catalyst were lower for the modified catalysts in contrast to the initial NiCu/SiO2–ZrO2 system. The catalysts treatment in glacial acetic acid at 118 °C showed that modification by P and Mo gives a significant improvement of catalysts stability in acidic medium (mass loss decreases from 53 wt.% to 1 wt.%). Also a significant improvement of bulk crushing strength has been observed for PMo-modified samples (from 0.5 MPa to 1.2 MPa).

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Keywords
Bio-oil; Hydrotreatment; Hydrodeoxygenation; Guaiacol; Modified Ni-based catalyst
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Stabilized Ni-based catalysts for bio-oil hydrotreatment: Reactivity studies using guaiacol
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Publisher
Database: Elsevier - ScienceDirect
Journal: Catalysis Today - Volumes 220–222, March 2014, Pages 21–31
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Catalysis
Get Full-Text Now
Don't Miss Today's Special Offer
Price was $35.95
You save - $31
Price after discount Only $4.95
100% Money Back Guarantee
Full-text PDF Download
Online Support
Any Questions? feel free to contact us