Study on the Characteristics of Pyrolysis Gas and Oil from Corn Stalk Pyrolysis

Abstract

In this paper, stem-skins, stem-pith, stem-leaves of corn stalks were separated and pyrolyzed to produce pyrolysis gas and oil on the temperature-controlled slide tube furnace. The gas yield, the gas component and the oil-producing rate of the skins, pith and leaves of corn stalkspyrolysis were studied under the different pyrolysis temperatures and residence time. The results show that the pyrolysis gas yield and the oil production rate wereeffected significantlyby the temperature. With the increase of pyrolysis temperature, the gas yield of the skins, pith and leaves of corn stalks increased, while the oil production rate decreased. The maximum pyrolysis gas yield isthestem-leaves, the second is the stem-pith, andthestem-skin was the smallest. When the temperature increased from 550 °C to 750 °C, the content of CO and H2increased with the increase of temperature, while the content of CO2 in pyrolysis gas decreased. The contents of C2H4and C2H6did not change obviously, and the total content was about 2%. When thepyrolysis residence time was extended from 10 min to 60 min at 650 °C, the pyrolysis gas production rate of biomass increased gradually. When residence time was 10min and 60min, the gas production rate of the stem-skin was 34.32% and 38.92%, respectively. The component of the gaseous product is affected by the residence time, while the effect of oil yield is not significant.