化工进展ChemicalIndustryandEngineeringProgress2023年第42卷第7期CeO2/TiO2吸附剂煤气脱汞产物的浸出规律陆洋，周劲松，周启昕，王瑭，刘壮，李博昊，周灵涛（浙江大学能源清洁利用国家重点实验室，浙江杭州310027）摘要：基于金属氧化物脱汞吸附剂后续无害化处理要求，本文提出采用硫代硫酸钠（Na2S2O3）溶液浸出金属氧化物脱汞产物的新思路。CeO2/TiO2吸附剂（CeTi）吸附汞后得到含汞吸附剂（Hg-CeTi），利用汞程序升温脱附实验（Hg-TPD）确定其表面吸附态汞的赋存形态。随后探究Na2S2O3溶液对于Hg-CeTi表面脱汞产物的浸出能力，着重分析不同赋存形态的汞在Na2S2O3溶液中的迁移规律。Hg-TPD结果表明，模拟煤气中脱汞产物以HgCl2、HgO和HgS为主。由于硫代硫酸根（S2O2-3）与Hg2+的配合能力，HgO易从Hg-CeTi表面脱附并向液相迁移；HgCl2会在液相中与OH-反应生成HgO，再被Na2S2O3溶液浸出；对于两种不同晶型的HgS，提高Na2S2O3溶液浓度可促进HgS(black)向液相迁移，但对于更稳定的HgS(red)收效甚微。在1.0mol/L的Na2S2O3溶液中浸出1h后，汞浸出率可达97.3%，且剩余的汞以稳定的HgS形态存在。关键词：浸出；汞；吸附剂；稳定性；合成气；废物处置中图分类号：TK09；X511文献标志码：A文章编号：1000-6613（2023）07-3875-09LeachingmechanismofHg-absorptionproductsonCeO2/TiO2sorbentsinsyngasLUYang，ZHOUJinsong，ZHOUQixin，WANGTang，LIUZhuang，LIBohao，ZHOULingtao(StateKeyLaboratoryofCleanEnergyUtilization，ZhejiangUniversity,Hangzhou310027,Zhejiang,China)Abstract:Inviewoftherequirementsofthesubsequentinnocuitytreatmentofmetaloxideadsorbentsformercuryremoval,abrand-newideaofleachingHg-absorptionproductsfrommetaloxideusingsodiumthiosulfate(Na2S2O3)solutionwasproposedinthispaper.Mercury-containingadsorbents(Hg-CeTi)wasobtainedbyCeO2/TiO2sorbents(CeTi)aftermercuryadsorption.Mercurytemperature-programmeddesorption(Hg-TPD)wasusedtodeterminetheoccurrenceformofadsorbed-HgonthesurfaceofHg-CeTi.Then,theextractioncapacityofNa2S2O3solutionontheHg-absorptionproductsfromtheHg-CeTiwasstudied,andthemigrationmechanismofmercurywithdifferentoccurrenceformsinNa2S2O3solutionwasemphaticallyanalyzed.TheresultsofHg-TPDshowedthatHgCl2,HgOandHgSwerethemainHg-adsorptionproductsinthesyng...
