水稻秸秆与PVC塑料共气化过程中钾、钠、氯的迁移行为  

Transformation of K,Na and Cl elements in the co-gasification of rice straw and PVC

作　　者：杨天华[1] 丁一[1] 开兴平[1] 马静[1] 孙洋[1] 李润东[1] 

机构地区：[1]沈阳航空航天大学能源与环境学院辽宁省清洁能源重点实验室,辽宁沈阳110136

出　　处：《燃料化学学报》2014年第3期336-342,共7页Journal of Fuel Chemistry and Technology

基　　金：国家重点基础研究发展规划(973计划;2011CB201500);国家自然科学基金(51176130);辽宁省自然科学基金联合基金(2013024019)

摘　　要：采用固定床反应器,结合X射线衍射（XRD）表征和热力学计算研究了水稻秸秆与PVC塑料共气化过程中钾钠氯的迁移和状态变化.结果表明,混合物中氯的释放率与反应温度和PVC塑料的量（氯含量）有关.当反应温度为800～900℃时,PVC的量对混合物中氯元素释放率的影响最为显著;气化温度达900℃时,含PVC 20％（氯含量为11.5％）的水稻秸秆混合物中,氯元素的释放率较纯水稻上升了16.5％.与此同时,氯含量的增加也促进了钾钠在气相中的释放.气化温度为850℃时,当混合物中PVC比例大于20％（氯含量大于11.5％）时,氯对钾钠的气相析出有一定抑制作用;钾钠以KCl和NaCl的形式滞留在固相中,其含量随着混合物中PVC量的升高而降低.The co-gasification of rice straw with PVC was carded out in a fixed bed reactor; the transformation of K, Na and Cl elements was investigated through X-ray diffraction （XRD） and thermodynamic calculation. The results indicated that the release of chlorine is related to the operation temperature and PVC proportion in the co-gasification of rice straw and PVC. The content of PVC in the blend plays an important role in the release of Cl, especially at 800 -900 ℃ ; the amount of Cl released in gasification of the blend with 20% PVC （ 11.5% CI） is increased by 16.5%, compared with that of pure rice straw at 900 ℃. Meanwhile, the increase of CI content in the blend also prompts the release of K and Na. When the fraction of PVC is higher than 20% （ 〉 11.5% Cl）, the presence of Cl can restrain the release of K and Na at 850 ℃, which are retained in the ash as KCl and NaCl during the co-gasification of rice straw and PVC at 850 ℃ ; the content of which decreased with the increase of PVC countent in the blend.

关 键 词：水稻秸秆 PVC 共气化 氯 迁移 钾 钠 

分 类 号：TK6[动力工程及工程热物理—生物能]