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Selective hydrocracking of tetralin for light aromatic hydrocarbons

Paper ID Volume ID Publish Year Pages File Format Full-Text
53798 46984 2016 10 PDF Available
Title
Selective hydrocracking of tetralin for light aromatic hydrocarbons
Abstract

•Tetralin hydrocracking was studied as a model reaction for PAHs upgrading to BTX.•Various metals having different hydrogenation activity were loaded on H-Beta.•Ni-Sn/H-Beta and CoMo-S/H-Beta exhibited highly selective hydrocracking behavior.•The catalysts showed BTX and BTX+C9A yields of ∼48.1 and ∼55.5 wt%, respectively.

Hydrocracking (HYC) of tetralin was studied in a fixed-bed down-flow reactor under 4 MPa as a model reaction for polyaromatic hydrocarbons (PAHs) conversion to light aromatic hydrocarbons such as BTX and C9 aromatics. HYC catalysts were prepared by supporting various metals, (Ni, Ni-Sn and CoMo-S) possessing different hydrogenation (HYD) activity, on H-Beta. HYC of tetralin over Ni/H-Beta catalysts with various Ni contents (1-10 wt%) resulted in a non-selective HYC behavior to give low BTX yield but high yields of gaseous and naphtha products due to strong HYD activity of Ni. The HYD activity of Ni was suppressed by forming Ni-Sn intermetallic compounds by Sn addition. Thus, Ni-Sn/H-Beta catalysts showed BTX and BTX+C9A (C9 aromatics) yields as high as 48.1 wt% and 53.1 wt%, respectively. The BTX and BTX+C9A yields corresponded to about 75 and 83% of the theoretical yield, respectively. CoMo-S/H-Beta, whose metal showed the lowest HYD activity, also exhibited BTX (47.4 wt%) and BTX+C9A (55.5 wt%) yields comparable to those obtained over Ni-Sn/H-Beta. Besides metallic function in HYC catalysts, H2/tetralin molar ratio greater than 4 and H-Beta with a moderate acidity are desirable to achieve a highly selective HYC of tetralin into BTX with high yield at low hydrogen consumption.

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Keywords
Polyaromatic hydrocarbons; Tetralin hydrocracking; BTX; Ni-Sn/H-Beta; CoMo/H-Beta
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Selective hydrocracking of tetralin for light aromatic hydrocarbons
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Publisher
Database: Elsevier - ScienceDirect
Journal: Catalysis Today - Volume 265, 1 May 2016, Pages 144–153
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