Potassium Solubility of the Fly Ash from Corn Straw Power Plant

Xiao Qiang Wang; Shi Yong Wang; Xu Zhao; Wen Yan Li; Chang Qing Dong; Li Zhao

doi:10.4028/www.scientific.net/AMR.860-863.534

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Unconventional Type of Biomass Suitable for the Production of Biofuels
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Experimental Research of Biomass Pyrolysis Characteristics at Low Temperature
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Preparation of Activated Carbon from Formic Acid Hydrolysis Residue by Chemical Activation of ZnCl₂
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Potassium Solubility of the Fly Ash from Corn Straw Power Plant
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Economic Analysis of Biogas Cogeneration Systems of Medium-Sized Breeding Plants
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Marginal Land-Based Biomass Energy Production in Yellow River Delta
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Pyrolytic Behavior and Kinetic Analysis of Wheat Straw and Lignocellulosic Biomass Model Compound
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A Research on the Performance of a Common Rail Diesel Engine Fueled with Different Blending Ratio of Biodiesels
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HomeAdvanced Materials ResearchAdvanced Materials Research Vols. 860-863Potassium Solubility of the Fly Ash from Corn...

Potassium Solubility of the Fly Ash from Corn Straw Power Plant

Abstract:

The industry of biomass power in China has been growing tremendously in recent years, but it is faced with many challenges now. The low efficiency of straw combustion in the boiler results in that the carbon content in the fly ash could reach 15~30%. The ash is also rich in silica, potassium, calcium and has a lot of microelements. A kind of fly ash from a biomass power plant mainly uses corn straw as feedstock was studied. XRF analysis showed that the contents of K₂O, CaO and MgO in the ash were 7.22%, 13.61% and 7.22%, respectively. Leaching experiments were conducted to evaluate the solubility of nutritive elements K, Ca and Mg in the ash. The results indicated that acid could enhance the solubility compared with pure water. Under the optimal conditions of filtrate final pH neutral, leaching time 20min, ratio of liquid to solid (L/S) 2, reaction temperature 40°C and stirring time 1min just for homogenization, 36.9% of K, 42.8% of Ca and 10.1% of Mg in the ash could be extracted. These dissolution rates were still very low, that means, the thorough extraction is not very easy and further research should be continued to make the straw power industry ecological and sustainable.