| 面向异丁烷脱氢介孔γ-Al2O3基催化剂的合成及其高催化性能 |
| Synthesis and Catalytic Performance of Mesoporous γ-Al2O3 Catalyst for Isobutane Dehydrogenation |
| 作者 | 单位 | E-mail | | 刘越洋 | 大连理工大学精细化工国家重点实验室, 吸附与无机膜研究所, 大连 116012 | | | 郑小琴 | 大连理工大学精细化工国家重点实验室, 吸附与无机膜研究所, 大连 116012 | | | 杨建华 | 大连理工大学精细化工国家重点实验室, 吸附与无机膜研究所, 大连 116012 | yjianhua@dlut.edu.cn | | Waseem Raza | 大连理工大学精细化工国家重点实验室, 吸附与无机膜研究所, 大连 116012 | | | 鲁金明 | 大连理工大学精细化工国家重点实验室, 吸附与无机膜研究所, 大连 116012 | | | 殷德宏 | 大连理工大学精细化工国家重点实验室, 吸附与无机膜研究所, 大连 116012 | | | 张艳 | 大连理工大学精细化工国家重点实验室, 吸附与无机膜研究所, 大连 116012 | |
|
| 摘要: 采用溶剂蒸发自组装法调控载体形貌及孔道结构，成功制备了有序介孔氧化铝载体。以铬氧物种为活性组分，碱金属钾为助剂，采用浸渍法制备负载型催化剂，用于异丁烷催化脱氢反应，研究了反应温度、原料流速、催化剂粒径等因素对催化性能的影响。采用X射线粉末衍射、透射电子显微镜、N2物理吸附、氢气程序升温还原及热重等表征方法探讨了载体形貌、孔道结构与催化性能的构效关系，结果表明，低温下有利于控制异丙醇铝的水解和缩合及介孔γ-Al2O3的研制。与常规的γ-Al2O3相比，所制备的介孔γ-Al2O3的有更大的比表面积和良好的有序性，在600℃、101.325kPa、GHSV=1 000 h-1的条件下，10%（w/w） Cr2O3/γ-Al2O3催化剂性能最佳，异丁烷的转化率达63.1%，异丁烯的选择性达到85.5%。与传统的催化剂相比，介孔Cr2O3/γ-Al2O3催化剂具有大的比表面积，高度分散的活性组分，优良的催化性能和良好的抗积碳能力。 |
| 关键词: 异丁烷脱氢 异丁烯 氧化铝 催化剂 Cr2O3/γ-Al2O3 |
| 基金项目: |
| Abstract: A thermal stability and ordered mesoporous γ-Al2O3 was synthesized via the improved evaporation induced self-assembly strategy. As the carrier, a series mesoporous Cr2O3/γ-Al2O3 catalysts with various Cr content (1%~15% (w/w)) had been successfully prepared by impregnation method. The mesoporous γ-Al2O3 and the catalysts were characterized by X-ray diffraction (XRD), transmission electron microscope (TEM), H2 temperature programmed reduction (H2-TPR) and investigated for isobutane catalytic dehydrogenation. The results showed that low temperature process took control of isopropanol aluminum hydrolytic and condensation rate effectively. Mesoporous γ-Al2O3 owns larger surface areas and pore volume and increased channel order. Under given condition (600℃, 101.325 kPa, GHSV=1 000 h-1), 10%Cr2O3/γ-Al2O3 catalyst had the best performance, where the conversion of isobutane reached up to 63.1% and the selectivity of isobutene reached up to 85.5%. Compared to the conventional catalyst, the mesoporous Cr2O3/γ-Al2O3 catalyst possesses the advantages of larger specific surface area, highly dispersed active components, excellent catalytic property and very strong coking-resistance. |
| Keywords: isobutane dehydrogenation isobutene alumina catalyst Cr2O3/γ-Al2O3 |
| 投稿时间：2016-09-05 修订日期：2017-05-10 |
| 摘要点击次数: 2368 |
| 全文下载次数: 1495 |
| 刘越洋,郑小琴,杨建华,Waseem Raza,鲁金明,殷德宏,张艳.面向异丁烷脱氢介孔γ-Al2O3基催化剂的合成及其高催化性能[J].无机化学学报,2017,33(8):1357-1364. |
| 查看全文 查看/发表评论 下载PDF阅读器 |
| Support information: |
|
|
|
|
|
|
