Abstract
Direct thermochemical liquefaction of microcrystalline cellulose was carried out using sub- and supercritical solvents in a batch reactor. The decomposition efficiency of dodecane and m-xylene widely used in petrochemical industries was compared to that of methanol and 1,4-dioxane. At 400 °C, the conversion in methanol was the highest (92 wt% including gaseous products), but the operating pressure was too high. m-Xylene at the same temperature showed the conversion of 71.5 wt% with a lower number of products and milder pressure. Hydrogen contributed to the increase of the total conversion by 3-8% in m-xylene and methanol, compared with the results without adding any additional gas or with nitrogen pressurization. An acid-modified silica catalyst led to a significant increase of conversion in the supercritical methanol, but its effect was negligible in the aprotic solvents. The product compounds and property of solid residue depended on the supercritical solvents applied. The thermal-treated char after liquefaction in m-xylene, dodecane and 1,4-dioxane was an effective adsorbent for CO2 adsorption, showing the level comparable with activated carbons.
| Original language | English |
|---|---|
| Pages (from-to) | 175-186 |
| Number of pages | 12 |
| Journal | Journal of Supercritical Fluids |
| Volume | 95 |
| DOIs | |
| Publication status | Published - 2014 Jan 1 |
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All Science Journal Classification (ASJC) codes
- Physical and Theoretical Chemistry
- Chemical Engineering(all)
- Condensed Matter Physics
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Direct thermochemical liquefaction of microcrystalline cellulose by sub- and supercritical organic solvents. / Koriakin, Anton; Van Nguyen, Hai; Kim, Doo Wook; Lee, Chang-Ha.
In: Journal of Supercritical Fluids, Vol. 95, 01.01.2014, p. 175-186.Research output: Contribution to journal › Article
TY - JOUR
T1 - Direct thermochemical liquefaction of microcrystalline cellulose by sub- and supercritical organic solvents
AU - Koriakin, Anton
AU - Van Nguyen, Hai
AU - Kim, Doo Wook
AU - Lee, Chang-Ha
PY - 2014/1/1
Y1 - 2014/1/1
N2 - Direct thermochemical liquefaction of microcrystalline cellulose was carried out using sub- and supercritical solvents in a batch reactor. The decomposition efficiency of dodecane and m-xylene widely used in petrochemical industries was compared to that of methanol and 1,4-dioxane. At 400 °C, the conversion in methanol was the highest (92 wt% including gaseous products), but the operating pressure was too high. m-Xylene at the same temperature showed the conversion of 71.5 wt% with a lower number of products and milder pressure. Hydrogen contributed to the increase of the total conversion by 3-8% in m-xylene and methanol, compared with the results without adding any additional gas or with nitrogen pressurization. An acid-modified silica catalyst led to a significant increase of conversion in the supercritical methanol, but its effect was negligible in the aprotic solvents. The product compounds and property of solid residue depended on the supercritical solvents applied. The thermal-treated char after liquefaction in m-xylene, dodecane and 1,4-dioxane was an effective adsorbent for CO2 adsorption, showing the level comparable with activated carbons.
AB - Direct thermochemical liquefaction of microcrystalline cellulose was carried out using sub- and supercritical solvents in a batch reactor. The decomposition efficiency of dodecane and m-xylene widely used in petrochemical industries was compared to that of methanol and 1,4-dioxane. At 400 °C, the conversion in methanol was the highest (92 wt% including gaseous products), but the operating pressure was too high. m-Xylene at the same temperature showed the conversion of 71.5 wt% with a lower number of products and milder pressure. Hydrogen contributed to the increase of the total conversion by 3-8% in m-xylene and methanol, compared with the results without adding any additional gas or with nitrogen pressurization. An acid-modified silica catalyst led to a significant increase of conversion in the supercritical methanol, but its effect was negligible in the aprotic solvents. The product compounds and property of solid residue depended on the supercritical solvents applied. The thermal-treated char after liquefaction in m-xylene, dodecane and 1,4-dioxane was an effective adsorbent for CO2 adsorption, showing the level comparable with activated carbons.
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U2 - 10.1016/j.supflu.2014.08.017
DO - 10.1016/j.supflu.2014.08.017
M3 - Article
AN - SCOPUS:84907924239
VL - 95
SP - 175
EP - 186
JO - Journal of Supercritical Fluids
JF - Journal of Supercritical Fluids
SN - 0896-8446
ER -