Effect of Fast Pyrolysis Conditions on Structural Transformation and Reactivity of Herbaceous Biomasses at High Temperatures

The results of the 29Si solid-state NMR study indicated that the silicates in rice husk chars were mainly amorphous No significant changes appeared in the 29Si solid-state NMR for Q2 , Q3 and Q4 branches of rice husk chars The presence of silicates in the rice husk affected the obtained char morphology by the formation of a glassy char shell due to the softening of the amorphous silicon oxides Silicates present in rice husk chars did not affect the reactivity in oxidation High alkali content in wheat straw increased the char reactivity.