BROWSE

Related Scientist

Ryoo, Ryong's photo.

Ryoo, Ryong
나노물질 및 화학반응 연구단
more info

ITEM VIEW & DOWNLOAD

Importance of pore size and Lewis acidity of Pt/Al2O3 for mitigating mass transfer limitation and catalyst fouling in triglyceride deoxygenation

Cited 0 time in webofscience Cited 0 time in scopus
57 Viewed 0 Downloaded
Title
Importance of pore size and Lewis acidity of Pt/Al2O3 for mitigating mass transfer limitation and catalyst fouling in triglyceride deoxygenation
Author(s)
Oh, Myungwon; Jin, Mingyu; Lee, Kyungho; Jeong-Chul Kim; Ryong Ryoo; Minkee Choi
Publication Date
2022-07-01
Journal
Chemical Engineering Journal, v.439
Publisher
Elsevier B.V.
Abstract
© 2022 Elsevier B.V.The deoxygenation of triglycerides via hydrotreating is a promising route for producing hydrocarbon fuels from renewable biomass. Because triglycerides are bulky esters possessing multiple C=C bonds, mass transfer limitation and coke deposition within the pore space of catalysts are significant problems. In this study, the catalytic effects of porous structure and surface acidity of Pt/Al2O3 were rigorously investigated in triglyceride deoxygenation. Pt was supported on a series of Al2O3 materials with various crystal structures (γ, θ, and α), pore sizes (3.3–28.6 nm), and Lewis acid amounts (0–337 µmol g−1), which were prepared by sol–gel synthesis. The γ- and θ-Al2O3 phases containing appreciable pentacoordinated Al sites effectively stabilized highly dispersed Pt particles (1.3–1.5 nm) via strong metal-support interactions and exhibited high catalytic activities. Conversely, Pt on α-Al2O3 without pentacoordinated Al sites exhibited very poor dispersion (> 12.6 nm), resulting in low catalytic activity. The results also showed that large mesopores (pore diameter > ∼12 nm) were essential to obtain maximum catalytic activity without mass transfer limitation and to suppress catalyst deactivation by fouling. When comparing the γ- and θ-Al2O3 phases, the latter generally showed inhibited formation of heavy products and coke owing to its larger pore size and smaller amount of Lewis acid sites that can catalyze undesirable oligomerization of unsaturated fatty acids. Consequently, Pt on θ-Al2O3 with extra-large mesopores (pore diameter: 28.6 nm) simultaneously exhibited the highest deoxygenation activity, selectivity toward diesel-range paraffins, and long-term stability.
URI
https://pr.ibs.re.kr/handle/8788114/11352
DOI
10.1016/j.cej.2022.135530
ISSN
1385-8947
Appears in Collections:
Center for Nanomaterials and Chemical Reactions(나노물질 및 화학반응 연구단) > 1. Journal Papers (저널논문)
Files in This Item:
There are no files associated with this item.

qrcode

  • facebook

    twitter

  • Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.
해당 아이템을 이메일로 공유하기 원하시면 인증을 거치시기 바랍니다.

Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.

Browse