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A series of CexZr0.50-xAl0.50O1.75(0.05≤x≤0.45) mixed oxides with different Ce/Zr ratio were prepared by co-precipitation method and characterized by means of X-ray diffraction(XRD),Brunauer-Emmet Teller method(BET),temperature-programmed reduction(H2-TPR) and oxygen pulsing technique.The XRD results showed that all samples kept the single CeO2 cubic fluorite structure after calcination at 600 and 1000 oC for 5 h.The results of BET revealed that CexZr0.50-xAl0.50O1.75 with Ce/Zr molar ratio 1/1 exhibited higher specific surface area(212 m2/g) and larger pore volume(0.40 ml/g).For all aged samples,CZA with Ce/Zr molar ratio 3/7 presented the highest specific surface area(104 m2/g) and pore volume(0.34 ml/g).The compounds could still keep prominent structural and textural stability with excellent redox properties even calcined at 1000 oC. 相似文献
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以氧化胺(OA)、椰油酰胺基丙基甜菜碱(CAB)、铵盐(AS)和表面活性剂(J-1)为原料,通过正交试验研制出一种新型抗甲醇气井泡排剂GF。室内评价实验主要采用罗氏-迈尔斯(Ross—Miles)方法,利用采气现场取回含甲醇气田地层水对该泡排剂的表面张力、抗甲醇能力、耐温性能以及抗矿化度能力等进行了研究。实验结果表明,当单体最佳质量配比为3:2:5:9时,研制的泡排剂GF可大幅降低溶液的表面张力,具有优良的抗矿化度能力和较好的耐温性能。泡排剂GF罗氏泡沫高度和15min携液量均高于现场泡排剂OA-12、BS-12和CT5—2B,说明泡排剂GF具有较强的抗甲醇能力,可满足天然气的开采需要,具有广阔的应用前景。 相似文献
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