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首页> 外文期刊>Chemosphere >Enhanced Dechlorination Of Chlorobenzene And In Situ Dry Sorption Of Resultant Cl-compounds By Cao And Na_2co_3 Sorbent Beds Incorporated With Fe_2o_3
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Enhanced Dechlorination Of Chlorobenzene And In Situ Dry Sorption Of Resultant Cl-compounds By Cao And Na_2co_3 Sorbent Beds Incorporated With Fe_2o_3

机译：Ca和Na_2co_3与Fe_2o_3结合的吸附剂床增强氯苯的脱氯作用及所得Cl化合物的原位干式吸附

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摘要

The dechlorination of C_6H_5Cl and the in situ dry sorption of Cl-compounds produced by C_6H_5Cl decomposition in an alkaline sorbent of CaO or Na_2CO_3 incorporated with Fe_2O_3 were studied. A sample gas containing C_6H_5Cl at an initial concentration of 500 ppm balanced by either N_2, O_2 (5%)-N_2 or H_2O (10%)-N_2 carrier gas was introduced into a lab-scale quartz tube reactor where CaO or Na_2CO_3 sorbent was packed with Fe_2O_3. Subsequently, the effect of Fe_2O_3 addition to CaO or Na_2CO_3 on the removal of C_6H_5Cl, achieved by the decomposition of C_6H_5Cl as well as the dry sorption of Cl-compounds produced by C_6H_5Cl decomposition, was investigated.rnIt was found that the decomposition of C_6H_5Cl in CaO or Na_2CO_3 sorbent bed incorporated with Fe_2O_3 occurred in the lower temperatures, compared to the case when only CaO or Na_2CO_3 sorbent bed was used. Thus, Fe_2O_3 was found to play a catalytic role in the oxidative decomposition of C_6H_5Cl. Further, the decomposition of C_6H_5Cl in a bed containing only Fe_2O_3 was promoted by the presence of O_2 and H_2O in the reaction atmosphere. Moreover, a higher amount of Cl was absorbed in the combined CaO/ Fe_2O_3 and Na_2CO_3/Fe_2O_3 beds, compared to the absorption of Cl-compounds in only CaO or Na_2CO_3 sorbent bed. Finally, the comparison of CaO and Na_2CO_3 sorbents showed that the decomposition of C_6H_5Cl and the in situ dry sorption of the resultant Cl-compounds in the combined Na_2CO_3 and Fe_2O_3 beds were higher than those in the combined CaO and Fe_2O_3 beds.
机译：研究了在掺有Fe_2O_3的CaO或Na_2CO_3的碱性吸附剂中，C_6H_5Cl的脱氯作用和C_6H_5Cl分解产生的Cl化合物的原位干吸附。将包含浓度为500 ppm的C_6H_5Cl且由N_2，O_2（5％）-N_2或H_2O（10％）-N_2载气平衡的样气引入实验室规模的石英管反应器，在该反应器中，CaO或Na_2CO_3吸附剂装满Fe_2O_3。随后，研究了通过将Ca_6H_5Cl分解以及C_6H_5Cl分解产生的Cl化合物的干吸附而实现的，在CaO或Na_2CO_3中添加Fe_2O_3对去除C_6H_5Cl的作用.rn与仅使用CaO或Na_2CO_3吸附剂床的情况相比，与Fe_2O_3结合的CaO或Na_2CO_3吸附剂床在较低的温度下发生。因此，发现Fe_2O_3在C_6H_5Cl的氧化分解中起催化作用。此外，反应气氛中O_2和H_2O的存在促进了仅含有Fe_2O_3的床中C_6H_5Cl的分解。此外，与仅在CaO或Na_2CO_3吸附剂床中吸收Cl-化合物相比，在组合的CaO / Fe_2O_3和Na_2CO_3 / Fe_2O_3床中吸收了更高量的Cl。最后，CaO和Na_2CO_3吸附剂的比较表明，Na_2CO_3和Fe_2O_3组合床中C_6H_5Cl的分解和所得Cl化合物的原位干吸附均高于CaO和Fe_2O_3组合床中的。

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