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Study on Desulfurization Efficiency and Products of Ce-Doped Nanosized ZnO Desulfurizer at Ambient Temperature 被引量:13
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作者 李芬 闫波 +4 位作者 张杰 姜安玺 邵纯红 孔祥吉 王新 《Journal of Rare Earths》 SCIE EI CAS CSCD 2007年第3期306-310,共5页
Ce-doped nanosized ZnO desulfurizer was prepared by homogeneous precipitation,and its desulfurization efficiency at ambient temperature was investigated through dynamic experiments.The results showed that the desulfur... Ce-doped nanosized ZnO desulfurizer was prepared by homogeneous precipitation,and its desulfurization efficiency at ambient temperature was investigated through dynamic experiments.The results showed that the desulfurization activity of nanosized Ce-ZnO had improved greatly,compared to nanosized ZnO desulfurizer.Nanosized Ce-ZnO desulfurizer was characterized by XRD,TPD-MS,XPS,and TEM.The research results indicated that doping Ce decreased the particle size of the nanosized ZnO desulfurizer and ZnS was the principal desulfurization product.There were adsorption complexes of HS and S on the surface of desulfurizer as well.Only a small amount of vapor appeared in the tail gas on the condition of meeting the precision of desulfurization. 展开更多
关键词 nanosized ZnO Ce-doped desulfurization at ambient temperature rare earths
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Effect of Calcium Oxide Additive on the Performance of Iron Oxide Sorbent for High-Temperature Coal Gas Desulfurization 被引量:7
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作者 Huiling Fan Kechang Xie Ju Shangguan Fang Shen Chunhu Li 《Journal of Natural Gas Chemistry》 CAS CSCD 2007年第4期404-408,共5页
The effect of calcium oxide additive in iron oxide sorbent for hot gas desulfurization was investigated by XRD and TPR techniques.XRD characterization showed that CaO was highly dispersed after the calcination of sorb... The effect of calcium oxide additive in iron oxide sorbent for hot gas desulfurization was investigated by XRD and TPR techniques.XRD characterization showed that CaO was highly dispersed after the calcination of sorbents.Calcium sulfate formed in the desulfurization was decomposed and regenerated to CaO by reacting with CO before the next sulfidation process.Calcium participated in every sulfidation/regeneration cycle and contributed to the enhancement of sulfur capacity.The TPR results showed that the reduction temperature of the sorbent increased with the increase of the content of calcium.Calcium played a role of retarding reduction.Therefore,the addition of calcium oxide additive will benefit the utilization of iron oxide sorbent in strongly reducing atmospheres. 展开更多
关键词 calcium oxide iron oxide sorbent high temperature desulfurization
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Ambient temperature desulfurizer of nano-ZnO modified with cerium
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作者 李芬 闫波 +3 位作者 张杰 姜安玺 邵纯红 张彦平 《Journal of Harbin Institute of Technology(New Series)》 EI CAS 2008年第4期487-490,共4页
The compound nano-ZnO modified with Ce was prepared by homogeneous precipitation.IR,XRD and dynamic experiments show that the crystal size of nano-ZnO desulfurizer is decreased after being modified with Ce and its des... The compound nano-ZnO modified with Ce was prepared by homogeneous precipitation.IR,XRD and dynamic experiments show that the crystal size of nano-ZnO desulfurizer is decreased after being modified with Ce and its desulfurization activities are improved greatly.When calcined at 270 ℃,Ce distributes evenly on the ZnO particle surface as amorphous state oxides,and the amorphous ZnO·H2O also exists;when the calcining temperature is 570 ℃,the crystal CeO2 separates out and the amorphous structure of zinc oxide disappears,at the same time,the crystal is perfect and its size increases,but the desulfurization activities decrease.The desulfurization product of nano-ZnO modified with Ce was analyzed with XPS.The results show that the adsorption compound of HS,S and ZnS exists on the surface of the desulfurizer. 展开更多
关键词 modified with cerium desulfurization at ambient temperature NANO-ZNO hydrogen sulfide
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