1.华东理工大学化工学院,上海市多相结构材料化学工程重点实验室,上海 200237
2.华东理工大学化学工程联合国家;重点实验室,上海 200237
何璐铭(1994—),男,硕士研究生,yjhyhlm@163.com
辛忠(1962—),男,博士,教授,xzh@ecust.edu.cn
收稿:2020-03-12,
修回:2020-06-09,
网络首发:2020-11-03,
纸质出版:2020-11-05
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何璐铭, 辛忠, 高文莉, 顾佳, 孟鑫. 静电纺丝法制备高活性多孔Ni/SiO2甲烷化催化剂[J]. 化工学报, 2020, 71(11): 5007-5015 DOI: 10.11949/0438-1157.20200251.
HE Luming, XIN Zhong, GAO Wenli, GU Jia, MENG Xin. Highly efficient porous Ni/SiO2 catalysts prepared by electrospinning method for CO methanation[J]. CIESC Journal, 2020, 71(11): 5007-5015 DOI: 10.11949/0438-1157.20200251.
何璐铭, 辛忠, 高文莉, 顾佳, 孟鑫. 静电纺丝法制备高活性多孔Ni/SiO2甲烷化催化剂[J]. 化工学报, 2020, 71(11): 5007-5015 DOI: 10.11949/0438-1157.20200251. DOI:
HE Luming, XIN Zhong, GAO Wenli, GU Jia, MENG Xin. Highly efficient porous Ni/SiO2 catalysts prepared by electrospinning method for CO methanation[J]. CIESC Journal, 2020, 71(11): 5007-5015 DOI: 10.11949/0438-1157.20200251. DOI:
以三嵌段共聚物P123为模板剂,采用静电纺丝法制备了多孔Ni/SiO
2
催化剂,考察其在CO甲烷化中的催化性能。采用N
2
物理吸脱附测试、扫描电子显微镜(SEM)、X射线衍射(XRD)、H
2
-程序升温还原(H
2
-TPR)、透射电子显微镜(TEM)、热重分析(TGA)对催化剂的结构性质进行表征。结果表明,静电纺丝法制备的多孔Ni/SiO
2
催化剂活性组分Ni在SiO
2
载体纤维上高度分散,比表面积大,Ni颗粒尺寸小,金属与载体相互作用强,在CO甲烷化反应中表现出优异的催化活性和稳定性。在温度450℃,压力0.1 MPa,质量空速15000 ml/(g·h)条件下,多孔Ni/SiO
2
催化剂CO转化率最高可达96.4%,CH
4
选择性可达86.4%。此方法为工业上制备高催化活性且无须二次成型的甲烷化催化剂提供了新思路。
Porous Ni/SiO
2
catalysts were prepared by electrospinning using P123 as template and the catalytic performance in CO methanation was evaluated. The synthesized catalyst was characterized by N
2
physisorption measurements
scanning electron microscopy (SEM)
X-ray diffraction (XRD)
hydrogen temperature-programmed reduction (H
2
-TPR)
transmission electron microscopy (TEM) and thermogravimetric analysis (TGA). The results showed that Ni particles were highly dispersed on the silica nanofibers. The presence of pore structure in electrospun fibers immensely increased the specific surface area. Moreover
the porous Ni/SiO
2
catalyst exhibited small particle size and strong metal-support interaction
which led to excellent catalytic activity with 96.4% CO conversion and 86.4% CH
4
selectivity at 450 °C under 0.1 MPa with a WHSV of 15000 ml/(g·h). The 100-hour lifetime test indicated that the porous Ni/SiO
2
catalyst had excellent stability. This method provides a new idea for the industrial preparation of methanation catalysts with high catalytic activity and without secondary molding.
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