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Controllable growth of Na2CO3 fibers for mesoporous activated alumina ball modification towards the high-efficiency adsorption of HCl gas at low temperature

机译:Na 2 CO 3 纤维的可控生长用于介孔活性氧化铝球的改性,从而在低温下高效吸附HCl气体

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To fundamentally solve the problem of chlorine corrosion in blast furnace gas (BFG) systems, a supported adsorbent is used for HCl removal at low temperature. In this paper, three alkaline substances, Ca(OH)2, NaOH, and Na2CO3, were separately coated on the surface of activated alumina balls (AABs) by wetness impregnation method, using the as-active components. These materials were measured by XRF, XRD, SEM, TEM, and N2 adsorption to characterize textural properties. The modification experiments indicated that Na2CO3 fibers can be obtained on the surface of AABs by adjusting the loading amounts, impregnation time, and drying conditions. The fibers' structure contributes to the gas phase diffusion in the product layer, greatly improving the conversion of Na2CO3 (>0.98). The highest value of HCl adsorption capacity reaches 3.56 mmol g?1 when the Na2CO3 loading amount is 20 wt%, five times the adsorption capacity of pure AABs. The kinetics of HCl removal by the Na2CO3 fiber-modified AABs is controlled by the interfacial chemical reaction.
机译:为了从根本上解决高炉煤气(BFG)系统中的氯腐蚀问题,使用了负载型吸附剂在低温下去除HCl。本文研究了三种碱性物质,Ca(OH) 2 ,NaOH和Na 2 CO 3 ,使用活性成分通过湿法浸渍法分别涂覆在活性氧化铝球(AAB)的表面上。通过XRF,XRD,SEM,TEM和N 2 吸附法对这些材料进行了测量,以表征织构性质。改性实验表明,通过调节负载量可以在AAB表面获得Na 2 CO 3 纤维量,浸渍时间和干燥条件。纤维的结构有助于产物层中的气相扩散,大大提高了Na 2 CO 3 的转化率小>(> 0.98)。 Na 2 CO <时,HCl吸附容量的最大值达到3.56 mmol g ?1 sub> 3 的负载量为20 wt%,是纯AAB吸附容量的五倍。 Na 2 CO 3 纤维改性AAB去除HCl的动力学受界面化学反应的控制。

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