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钙基吸附剂捕集生物质燃气中的二氧化碳

Keywords: 生物质燃气,CO2,钙基吸附剂,孔径,白云石

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Abstract:

生物质热解燃气中CO2的捕集,是提高燃气热值和实现碳减排的关键问题之一。为利用生物质热解燃气温度偏高的特点,拟通过化学吸附方法,捕集燃气中高浓度的CO2。为此,利用不同钙基前驱物制备了系列钙基固体吸附剂,系列钙基固体吸附剂对CO2的单次吸附和循环吸附实验结果表明,含钙和镁氧化物混合物的吸附剂具有较稳定的循环吸附特性以及较大的吸附负荷。孔结构特性分析表明,适宜于CO2吸附的有效孔径范围可能为小于4nm。因此,可以通过对天然白云石的改性获得合适孔径的钙镁基固体吸附剂,达到有效捕集生物质燃气中CO2的目的。

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