WFRF:(Åmand Lars Erik 1957)
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Effect of pH on Kraft Lignin Depolymerisation in Subcritical Water
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- Belkheiri, Tallal, 1985 (author)
- Chalmers tekniska högskola,Chalmers University of Technology
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- Mattsson, Cecilia, 1970 (author)
- Chalmers tekniska högskola,Chalmers University of Technology
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- Andersson, Sven-Ingvar, 1943 (author)
- Chalmers tekniska högskola,Chalmers University of Technology
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- (creator_code:org_t)
- 2016-06-06
- 2016
- English.
- In: Energy & Fuels. - : American Chemical Society (ACS). - 1520-5029 .- 0887-0624. ; 30:6, s. 4916-4924
- Journal article (peer-reviewed)
Abstract
Subject headings
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- Softwood kraft lignin was depolymerized using subcritical water (623 K and 25 MPa) in a continuous small pilot unit. ZrO2 and K2CO3 were used as catalysts, and phenol was used as capping agent to suppress repolymerization. The effect of pH was investigated by adding KOH in five steps to the feed. The yield of water-soluble organics increased with pH. The yield of bio-oil was also influenced by the pH and varied between 28 and 32 wt %. The char yield on the zirconia catalyst showed a minimum at pH 8.1. The yield of suspended solids was low at pH below 8.1 but increased at higher pH values. The oxygen content in the bio-oil was only 15 wt %, compared to about 26 wt % in the kraft lignin.
Subject headings
- TEKNIK OCH TEKNOLOGIER -- Kemiteknik (hsv//swe)
- ENGINEERING AND TECHNOLOGY -- Chemical Engineering (hsv//eng)
Keyword
- chemicals
- hydrogen
- supercritical water
- Engineering
- catalytic depolymerization
- ethanol
- pyrolysis
- degradation
- near-critical water
- alkali lignin
- Energy & Fuels
- conversion
Publication and Content Type
- art (subject category)
- ref (subject category)
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