Comparison of degradation features of lignin to phenols over Pt catalysts prepared with various forms of carbon supports. Issue 21 (9th February 2016)

• Record Type: Journal Article
• Authors: Park, Jeesu; Oh, Shinyoung; Kim, Jae-Young; Park, Shin Young; Song, In Kyu; Choi, Joon Weon
• Is Part Of: RSC advances. Volume 6:Issue 21(2016)
• Page Start: 16917
• Page End: 16924
• Publication Date: 2016-02-09
• Subjects: Chemistry -- Periodicals; 540.5
• DOI: 10.1039/c5ra21875f
• Languages: English
• ISSNs: 2046-2069

Abstract

Abstract : Soda lignin separated from wheat straw was successfully depolymerized to produce a phenol-rich oil fraction over various carbon-supported platinum (Pt) catalysts. Abstract : Soda lignin separated from wheat straw was successfully depolymerized to produce a phenol-rich oil fraction over various carbon-supported platinum (Pt) catalysts. Three different supports (mesoporous carbon (STC), porous carbon (TC), and microporous carbon (DC)) were prepared; 5 wt% Pt on commercial activated carbon (Pt/C) was also used as a comparison. The surface characterizations of the catalysts were examined by FE-SEM, BET, XRD, XPS and HR-TEM. The Pt/C and Pt/STC proved to be superior catalysts for producing high yields of lignin-oil (Pt/C: 79.9 wt% and Pt/STC: 79.4 wt%) with low amounts of char (Pt/C: 4.2 wt% and Pt/STC: 7.6 wt%) compared to the other catalysts. This is due to the fine dispersion of Pt ( i.e., higher BET surface area) on these carbon supports. In addition, we found a high correlation between the BET surface area (Pt dispersion) and the molecular weight of the lignin-oil. The amounts of monomeric phenol compounds, which are mainly composed of 4-ethlyphenol, 4-methylguaiacol, and 4-propylguaiacol, were also higher with Pt/C (90.92 mg g −1 of lignin) and Pt/STC (78.06 mg g −1 of lignin) compared to the other samples.