摘要
以Na2SiO3.9H2O为硅源,H2PtCl6为铂源,水热法一步合成了Pt质量分数约1%的Pt/SBA-15和Pt/SBA-16催化剂.采用XRF、XRD、HRTEM等方法对样品进行了表征.在微型固定床反应器中考察了催化剂的甲烷催化燃烧性能.结果表明:合成的Pt/SBA-15和Pt/SBA-16样品分别具有SBA-15和SBA-16的高度有序的介孔结构;通过这种简便、低成本的方法可将Pt颗粒高分散地引入到样品的孔道内;催化剂表现出了较好的甲烷催化燃烧性能,在常压、原料气为含3.5%CH4的空气和GHSV=6000mL/(gcat.h)的反应条件下,在大约580℃下甲烷即可完全转化.
Pt/SBA-15 and Pt/SBA-16 with Pt content approximating to 1% were hydrothermally synthesized using Na2SiO3·9H2O as the silica source and H2PtCl6 as the platinum source. The prepared materials were characterized by means of X-ray fluorescence spectrophotometer （ XRF）, X-ray powder diffraction （ XRD）, high resolution trans- mission electron microscope （HRTEM） and N2 adsorption-desorption isotherms. The performances of the samples in the methane catalytic combustion were evaluated. The results indicated that the synthesized materials maintained mesoporous structure of SBA-15 and SBA-16, and platinum crystallite particles have beenwere confined into their channels by using this facile and inexpensive synthetic method. The samples showed good catalytic performances for methane catalytic combustion, At 0.1 MPa, about 580 ℃, air with 3.5% CH4as reactant and GHSV = 6 000 mL/（gcat·h）, methane can be oxidized completely.
出处
《分子催化》
EI
CAS
CSCD
北大核心
2008年第4期368-373,共6页
Journal of Molecular Catalysis(China)
基金
国家自然科学基金项目(20376005)
