Conversion of Ethanol-Lignin from Pine Wood in a Supercritical Ethanol in the Presence of Borate-Containing Alumina Catalysts

Full text (.pdf)
Issue
Химия. Chemistry. 2018 11 (1)
Authors
Sharypov, Victor I.; Beregovtsova, Natalia G.; Baryshnikov, Sergei V.; Miroshnikova, Angelina V.; Lavrenov, Alexandr V.; Kuznetsov, Boris N.
Contact information
Sharypov, Victor I.: Institute of Chemistry and Chemical Technology SB RAS FRC “Krasnoyarsk Science Center SB RAS” 50/24 Akademgorodok, Krasnoyarsk, 660036, Russia; ; Beregovtsova, Natalia G.: Institute of Chemistry and Chemical Technology SB RAS FRC “Krasnoyarsk Science Center SB RAS” 50/24 Akademgorodok, Krasnoyarsk, 660036, Russia; Baryshnikov, Sergei V.: Institute of Chemistry and Chemical Technology SB RAS FRC “Krasnoyarsk Science Center SB RAS” 50/24 Akademgorodok, Krasnoyarsk, 660036, Russia; Miroshnikova, Angelina V.: Institute of Chemistry and Chemical Technology SB RAS FRC “Krasnoyarsk Science Center SB RAS” 50/24 Akademgorodok, Krasnoyarsk, 660036, Russia; Lavrenov, Alexandr V.: Institute of Hydrocarbons Processing SB RAS 54 Neftezavodskaya, Omsk, 644040, Russia; Kuznetsov, Boris N.: Institute of Chemistry and Chemical Technology SB RAS Federal Research Center “Krasnoyarsk Science Center SB RAS” 50/24 Akademgorodok, Krasnoyarsk, 660036, Russia; Siberian Federal University 79 Svobodny, Krasnoyarsk, 660041, Russia
Keywords
pine ethanol-lignin; supercritical ethanol; conversion; borate-containing catalysts; liquid products; composition
Abstract

The influence of temperature on the conversion of ethanol-lignin in supercritical ethanol and on the yield and composition of the products formed was studied. In the absence of catalysts, the highest yield (60 wt.%) of liquid products of thermal conversion of ethanol-lignin was obtained at the temperature of 300 °C. According to GC-MS data, the ethanol-soluble products mainly consist of phenols, methoxyphenols and ethyl esters of carboxylic acids. The increase of the temperature of ethanol-lignin conversion to 400 °C intensifies the transformation of liquid ethanol-soluble products into solid and gaseous substances and leads to a decrease in ethanol-soluble products the content of methoxyphenols by 3 times and of carboxylic acid esters by 2 times. The use of catalysts, based on borate-containing alumina in the process of ethanol-lignin conversion in a supercritical ethanol at the temperature 300 °C increases the yield of products, boiling up to 180 °C by 3,4-3,6 times and rises the yield of methoxyphenols by 1,4-1,7 times in comparison with a non-catalytic process

Pages
81-92
Paper at repository of SibFU
http://elib.sfu-kras.ru/handle/2311/70992