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Published on: October 7, 2018
Effect of torrefaction on rice straw physicochemical characteristics and particulate matter emission behavior during
Xingping Kai1, Yuxia Meng2, Tianhua Yang2
1Key Laboratory of Clean Energy of Liaoning, College of Energy and Environment, Shenyang Aerospace University, Shenyang 110136, PR China; Key Laboratory of Ocean Energy Utilization and Energy Conservation of Ministry of Education, School of Energy and Power Engineering, Dalian University of Technology, Dalian 116024, China.
Abstract:
In this work, the effects of different torrefaction temperatures and durations on the physicochemical properties of rice straw (RS), and the emission characteristic of PM10 (particulate matter with aerodynamic diameters of ≤10 µm) during torrefied RS combustion, were investigated. Results indicate that the release of Cl and K, and decomposition of the organic matrix demonstrated a promoting effect during torrefaction. However, the removal of Cl and K did not reduce the emission of PM1. The emission concentration of PM1 and PM1-10 generated from torrefied RS was enhanced, and the yields of PM1-10 was much higher than those of PM1. The concentrations of K and Cl in PM1-10 increased with torrefaction temperature, combined with the microstructure, indicating that the torrefaction pretreatment promoted the heterogeneous condensation of KCl vapour to form PM1-10.
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