PERFORMANCE EVALUATION OF SEVERAL SOLID HETEROPOLY COMPOUNDS AS FUNCTIONAL TRAPS FOR NOX REMOVAL
PERFORMANCE EVALUATION OF SEVERAL SOLID HETEROPOLY COMPOUNDS AS FUNCTIONAL TRAPS FOR NOX REMOVAL
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几种固体杂多化合物作为脱硝功能捕集器的性能评估
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发表时间：
2011
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评估了几种 Keggin 杂多酸/盐从气流中吸附 NOx 的活性。所有实验均在固定床反应器中进行。所检查的候选杂多酸/盐包括H4PVMo11O40、H5PV2Mo10O40、H6PV3Mo9O40、(NH4)3PW12O40、(NH4)3PMo12O40、K3PW12O40、K2HPW12O40、KH2PW12O40。结果表明，[PMo12O40]3-阴离子中的配位原子Mo被一个或多个V原子取代时，NOx吸附活性仅发生轻微变化；然而，首次发现纳米(NH4)3PW12O40与相同粒径的催化剂相比，NOx吸附效率提高了10.6%；无论引入的金属阳离子如何，H3PW12O40中的H +被金属阳离子取代往往会降低吸附活性。通过IR分析，发现NO通过相互作用被吸附
Several Keggin heteropoly acids/salts were evaluated concerning their activities in adsorbing NOx from gas stream. All experiments were conducted in a fixed-bed reactor. The candidate heteropoly acids/salts examined comprise H4PVMo11O40, H5PV2Mo10O40, H6PV3Mo9O40, (NH4)3PW12O40, (NH4)3PMo12O40, K3PW12O40, K2HPW12O40, KH2PW12O40. Results showed that substitution of coordination atom Mo in the [PMo12O40] 3- anion by one or more V atoms leads to only slight change in NOx adsorption activity; however, it is for the first time that nano (NH4)3PW12O40 was found to have an up to 10.6% enhancement in NOx adsorption efficiency in comparison with the same catalyst of normal particle size; substitution of H + in H3PW12O40 by metal cation tends to lower the adsorption activity, regardless of the metal cations introduced. By IR analysis, NO was found to be adsorbed via interaction