The present work studied the transformation behavior of K involving the change of water-insoluble K and K2CO3 during biomass pyrolysis. KCl-loaded cellulose samples were used as fuels with the aim to determine the key reactions involved during K transformation. For comparision, KCl-loaded char samples were used as fuels to eliminate the effect of organics in cellulose on K transformation. The total amounts of K, and water-soluble K, Cl?, and CO32? in the fuels and in the obtained solid residues were quantified. The quantification results indicated that, during the pyrolysis of the KCl-loaded cellulose, the reactions between KCl and active functional groups which are produced from organic matter in cellulose during pyrolysis lead to a certain amount of water-insoluble K formed above 300 °C and the water-insoluble K was transformed into K2CO3 above 600 °C. The reactions between KCl and the organic matter in the cellulose were governed by both the availability of active functional groups produced during cellulose pyrolysis and the amount of KCl. The presence of O2 promoted the generation of K2CO3.
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机译：本文研究了水不溶性钾和K 2 CO 3 的变化对钾的转化行为的影响。在生物质热解过程中。负载KCl的纤维素样品用作燃料，目的是确定K转化过程中涉及的关键反应。为了进行比较，将氯化钾负载的炭样品用作燃料，以消除纤维素中有机物对钾转化的影响。 K，水溶性K，Cl ？ 和CO 3 <对燃料和所得固体残留物中的sup> 2？ 进行了定量。定量结果表明，在KCl负载的纤维素热解过程中，KCl与热解过程中纤维素中有机物产生的活性官能团之间的反应导致一定的水不溶性K在300°C和更高的温度下形成。在高于600°C的温度下，水不溶性K转化为K 2 CO 3 。 KCl与纤维素中有机物之间的反应受纤维素热解过程中产生的活性官能团的可用性和KCl的量的控制。 O 2 的存在促进了K 2 CO 3 。
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