Abstract: With silica as the carrier and bismuth nitrate pentahydrate as the precursor,Bi2O3/silica catalyst is prepared by an equal volume impregnation method.The performance of the catalyst in removing hydrogen from tail chlorine is studied in a fixed bed reactor under different reaction temperature,calcination temperature and different Bi2O3 loading amounts.The catalyst before and after the reaction is characterized by means of XRD,SEM,EDS and BET.Experimental results show that Bi2O3/silica catalyst that loads 3% of Bi2O3 and is calcined at 550℃ has the best catalytic effect at 50℃,leading to 97.8% of average hydrogen conversion rate.
[1] Pugh D,Bosauder P,Parnell M.Hazardous area classifications using computational fluid dynamic modelling[J].Appita:Technology,Innovation,Manufacturing,Environment,2017,70(2):116-123. [2] Peantong S,Tangjitsitcharoen S.A study of using hydrogen gas for steam boiler in cholor-alkali manufacturing[J].IOP Conference Series:Materials Science and Engineering,2017,215:012018. [3] Wang H H,Lu T T,Li Y N,et al.Study on low-temperature catalytic dehydrogenation reaction of tail chlorine by Pd/Al2O3[J].Journal of Chemistry,2016,5:1-6. [4] Klausde B,Brigitte L.Removal of chlorine from hydrogen gas mixtures by conversion in the presence of platinum or palladium catalysts:WO1994003394A1[P].1992-08-04. [5] Pieters W J M,Wenger F.Removal of low concentrations of hydrogen from chlorine gas:US4224239A[P].1980-09-23. [6] Liu X,Xue L,Chen X Q,et al.Iron oxide and Fe2O3/Al2O3 used to catalyze removing hydrogen from tail chlorine at low temperature[J].Quim.Nova,2019,42:319-328. [7] 路亭亭,刘茜,李玉娜,等.负载型金-银双金属催化剂低温催化尾氯脱氢性能[J].太原理工大学学报,2016,49(2):224-227. [8] 薛玲,张彤,赵斌,等.Fe2O3-Co3O4/Al2O3催化剂催化含氯尾气脱氢性能研究[J].应用化工,2020,49(10):2432-2436. [9] Zhang T,Xue L,Xue J W,et al.Cobaltosic oxide catalysts for catalytically removing hydrogen from tail chlorine[J].Acta Chimica Slovenica,2020,67(1):336-347. [10] Ishchenko E V,Gulyaev R V,Kardash T Y,et al.Effect of Bi on catalytic performance and stability of MoVTeNbO catalysts in oxidative dehydrogenation of ethane[J].Applied Catalysis A:General,2017,534:58-69. [11] Ting S W,Cheng S A,Tsang K Y,et al.Low activation energy dehydrogenation of aqueous formic acid on platinum-ruthenium-bismuth oxide at near ambient temperature and pressure[J].Chemical Communications,2009,47:7333-73335. [12] Witońska I,Królak A,Karski S.Bi modified Pd/support (SiO2,Al2O3) catalysts for hydrodechlorination of 2,4-dichlorophenol[J].Journal of Molecular Catalysis:A,Chemical,2010,331(1-2):21-28. [13] Rolly G S,Sermiagin A,Meyerstein D,et al.Silica support affects the catalytic hydrogen evolution by silver[J].European Journal of Inorganic Chemistry,2021,30:3054-3058. [14] Kim M Y,Kyriakidou E A,Choi J S,et al.Enhancing low-temperature activity and durability of Pd-based diesel oxidation catalysts using ZrO2 supports[J].Applied Catalysis B-Environmental,2016,187:181-194. [15] Parida K M,Pradhan A C.Fe/meso-Al2O3:An efficient photo-Fenton catalyst for the adsorptive degradation of phenol[J].Industrial & Engineering Chemistry Research,2010,49(18):8310-8318.