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The behaviour of particle bound phosphorus during the combustion of phosphate doped coal

机译：磷掺杂煤燃烧过程中颗粒结合磷的行为

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The aim of the investigations described in this paper is to provide basic information on the interaction of phosphorus compounds with fly ash. The information shall give better knowledge on the deactivation of DeNO_x-catalysts by phosphorus during co-combustion of sewage sludge or meat and bone meal. For the investigations, hard coal is doped with mineral or organic phosphates and sodium chloride. The fuel is burned in a plug flow reactor. Fly ash aerosols are collected at 900℃ and 420℃. Enrichments of dopants on fine par-ticulate matter indicate nucleation or condensation. This may significantly contribute to catalyst deactivation due to the high mobility and penetration capability of the small particles into the catalyst pores. The results show that the phosphorus concentration on the sub-micron particles is widely independent of the flue gas temperature. A strong relation of calcium and phosphorus is observed for the addition of both phosphates while sodium chloride shows an indirect influence only. Derived reactions of flue gas particles with sub-micron calcium phosphates indicate a contribution to catalyst deactivation at usual operating temperatures.
机译：本文所述研究的目的是提供有关磷化合物与粉煤灰相互作用的基本信息。该信息应使人们更好地了解污水污泥或肉和骨粉共燃烧过程中磷对DeNO_x催化剂的钝化作用。为了进行调查，硬煤中掺有矿物或有机磷酸盐和氯化钠。燃料在活塞流反应器中燃烧。在900℃和420℃下收集粉煤灰气溶胶。细颗粒物上掺杂物的富集表明成核或凝结。由于小颗粒的高迁移率和渗透能力，这可能极大地促进了催化剂的失活。结果表明，亚微米颗粒上的磷浓度与烟气温度广泛无关。两种磷酸盐的添加都观察到钙和磷之间的密切关系，而氯化钠仅显示出间接影响。烟气颗粒与亚微米磷酸钙的衍生反应表明，在通常的操作温度下，催化剂失活是有原因的。

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