Study on pyrolysis behavior and gas formation rate of washed rice straw

Journal article

Authors/Editors

Strategic Research Themes

No matching items found.

Publication Details

Author list: Thitima Sornpitak;Nakorn Worasuwannarak

Publication year: 2019

Journal: Journal of Sustainable Energy and Environment (1906-4918)

Volume number: 10

Issue number: 4

Start page: 91

End page: 95

ISSN: 1906-4918

URL: http://www.jseejournal.com/journal.php?id=44

Abstract

Three washing techniques namely water at room temperature, hot water, and hydrochloric acid were applied to rice straw to remove the inorganic matters. The ash content and elemental composition of washed rice straw were examined in detail. Then, the pyrolysis behaviors and gas formation rate during the pyrolysis of washed biomass were examined using TGA and TG-MS techniques. It was found that water could easily remove alkali metal and Cl, but water could not remove alkaline earth metals. On the other hand, hydrochloric acid could significantly remove alkali and alkaline earth metals. However, silicon cannot be removed by washing because of the strong bonding between amorphous silica and biomass matrix. Washing significantly affected the pyrolysis behavior of biomass. The weight change curves during the pyrolysis of washed biomass increased by approximately 20ฐC in temperature. It was found that the amount of tar produced during the pyrolysis increased significantly, whereas the amount of H2O decreased significantly by washing. From these measurements, the effect of inorganic matters on the pyrolysis behavior of biomass was examined in detail.

Keywords

gas formation rate., pyrolysis behavior, washing