CAJ | 학술논문

为降低烟气脱汞成本，提高活性焦脱汞性能，以内蒙古锡林浩特褐煤为原料制备活性焦并进行化学改性，分析载硫、Na2 S溶液和ZnCl2溶液浸渍等改性方法对活性焦结构及性能的影响，研究改性方法、吸附温度、负载量和汞渗透量对活性焦脱汞性能的影响。结果表明，活性焦改性后，比表面积和孔容积有所降低，载Na2 S、硫、ZnCl2活性焦对汞的吸附量比原始活性焦分别提高了60%、113%和140%；吸附温度升高，化学反应变快，活性焦的初始脱汞效率由75.8%提高至95%以上，但穿透时间并不呈比例增加；当ZnCl2负载量由5%提高至15%后，50%穿透率对应时间由75 min延长至120 min，活性焦对汞的吸附值由10.1μg/g增至17.5μg/g。随着汞渗透量的增加，活性焦脱汞效率有所提高，50%穿透率的对应时间由110 min缩短至95 min，最终总吸附值仅由14.4μg/g增至16.2μg/g。
위강저연기탈홍성본，제고활성초탈홍성능，이내몽고석림호특갈매위원료제비활성초병진행화학개성，분석재류、Na2 S용액화ZnCl2용액침지등개성방법대활성초결구급성능적영향，연구개성방법、흡부온도、부재량화홍삼투량대활성초탈홍성능적영향。결과표명，활성초개성후，비표면적화공용적유소강저，재Na2 S、류、ZnCl2활성초대홍적흡부량비원시활성초분별제고료60%、113%화140%；흡부온도승고，화학반응변쾌，활성초적초시탈홍효솔유75.8%제고지95%이상，단천투시간병불정비례증가；당ZnCl2부재량유5%제고지15%후，50%천투솔대응시간유75 min연장지120 min，활성초대홍적흡부치유10.1μg/g증지17.5μg/g。수착홍삼투량적증가，활성초탈홍효솔유소제고，50%천투솔적대응시간유110 min축단지95 min，최종총흡부치부유14.4μg/g증지16.2μg/g。
In order to reduce mercury removal cost from flue gas and improve mercury removal performance of activated coke,the Xilinhot lignite was chosen to prepare activated coke which was further modified by a series of chemical methods. The influence of sulfur,Na2 S, ZnCl2 impregnating on the structure and properties of activated coke was studied. Further more,the effects of modified methods,adsorbent temperature,capacity and mercury infiltration capacity on activated coke mercury removal performance were researched. The results showed that,after modification,the specific surface area and pore volume of activated coke decreased. Compared to the original activated coke,mer-cury adsorption of AC-Na2 S,AC-S and AC-ZnCl2 was respectively increased by 60%,113% and 140%. With the proportion of modifier to activated coke increased,the mercury adsorption capacity increased. With the adsorption temperature increased,the chemical reaction became faster,the initial efficiency of mercury removal could be increased from 75. 8% to above 95%,while the penetrate time didn’t in-crease proportional. When the ZnCl2 content in activated coke increased from 5% to 15%,the time which was needed to achieve 50% pen-etration rate increased from 75 minutes to 120 minutes,the mercury adsorption capacity of AC-ZnCl2 increasedfrom 10. 1 μg/g to 17. 5μg/g. With the increase of mercury infiltration capacity,the mercury removal efficiency increased,the time which was needed to achieve 50% penetration rate decreased from 110 minutes to 95 minutes. Finally ,the total adsorption increased from 14. 4 μg/g to 16. 2 μg/g.