| ZrO_2及SO_4~（2－）／ZrO_2超强酸催化剂的XRD分析 |
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| 引用本文： | 曾健青,钟炳,罗庆云,王琴.ZrO_2及SO_4~（2－）／ZrO_2超强酸催化剂的XRD分析[J].燃料化学学报,1994(2). |
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| 作者姓名： | 曾健青 钟炳 罗庆云 王琴 |
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| 作者单位： | 中国科学院山西煤炭化学研究所 |
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| 摘 要： | 用ＸＲＤ技术从定性和定量上对ＺｒＯ＿２，特别是超强酸催化剂的物相和四方相ＺｒＯ＿２的含量进行了详细的考察。结果表明，的引入使的晶化温度比ＺｒＯ＿２大约提高了１００Ｋ，并且使亚稳态四方相ＺｒＯ＿２得以稳定。亚稳态四方相ＺｒＯ＿２的含量主要受处理液浓度和焙烧温度的影响。处理液浓度越大，四方相含量越高；焙烧温度越高；四方相含量越低。强酸性的Ｈ＿２ＳＯ＿４溶液比弱酸性的（ＮＨ＿４）＿２ＳＯ＿４溶液对四方相的生成更有利。在无定形ＺｒＯ＿２、四方相ＺｒＯ＿２和单斜相ＺｒＯ＿２上的稳定性依次减小。
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| 关 键 词： | 硫酸根，二氧化锆，晶相结构，XRD，超强酸 |
INVESTIGATION OF ZrO_2AND SI /ZrO_2SUPERACID CATALYSTS BY XRD |
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| Zeng Jianqing, Zhong Bing, Luo Qingyun, Wang Qin.INVESTIGATION OF ZrO_2AND SI /ZrO_2SUPERACID CATALYSTS BY XRD[J].Journal of Fuel Chemistry and Technology,1994(2). |
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| Authors: | Zeng Jianqing Zhong Bing Luo Qingyun Wang Qin |
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| Abstract: | The crystal structures of ZrO_2,particularly SO2/ZrO_2 superacid catalystswere studied in detail by XRD technioue. It was found that the incorporation of SO sup-Dresspd the crvstalization and increased the crystalization temperature of ZrO_2.There is aclose relation between the tetragonal ZrO_2 content and calcination temperature and modifingsolution(H_2SO_4 or(NH_4)_2SO_4)concentration. The higher the calcination temperation is,the lower will be the tetragonal content.The higher the modifing solution concentration is,the higher will be the tetragonal content.Strongly acidic H_2SO_4 is preferable to weakly acidic(NH_4)_2SO_4 for the formation of tetragonal ZrO_2.The stability of active sites on ZrO_2 is in thefollowing order:amorphous ZrO_2>tetragonal ZrO_2>monoclinic ZrO_2. |
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| Keywords: | XRD ZrO_2 sulfate acid superacid tetragonal ZrO_2 |
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