PYROLYSIS CHARACTERISTICS OF CORN STALK HEMICELLULOSE IN A TUBULAR REACTOR
The pyrolysis characteristics of corn stalk hemicellulose were investigated in a tubular reactor at different temperatures, with the focus mainly on the releasing profile and forming behaviors of pyrolysis products (gas, char, and tar). The products obtained were further identified using various approaches (including GC, SEM, and GC-MS) to understand the influence of temperature on product properties and compositions. It was found that the devolatilization of hemicellulose mainly occurred at low temperatures (<500°C), and produced large amounts of tar. A higher reactor temperature was conducive to the yield of gas products, accompanied by a reduction of tar because of the secondary cracking of volatiles. The CO2 evolved out easily and reached a relatively large yield of 129.2ml/g at 550°C, while CO and H2 mainly released at higher temperature (700~900°C). The tar was mainly composed of a range of oxygenated compounds, including ketones, furans, carboxylic acids, and alcohols, and their contents were influenced by the final temperature. An in-depth analysis of the properties of the product generated at different temperatures is favorable for a better understanding of the mechanism of hemicellulose pyrolysis.
pyrolysis hemicellulose tubular reactor tar
Lv Gaojin Wu Shubin Lou Rui
State Key Laboratory of Pulp and Paper Engineering,South China University of Technology, Guangzhou,510640, China
国际会议
广州
英文
65-68
2010-11-08（万方平台首次上网日期，不代表论文的发表时间）