Carboxyl-modified colloidal crystal templates for the synthesis of three-dimensionally ordered macroporous SMMN2O5 mullite and its application in NOx-assisted soot combustion
作者： Yongjie Chen , Chun Du , Yun Lang , Liwei Jia , Rong Chen
DOI: 10.1039/C8CY01663A
关键词:
摘要: The strict regulation of emission levels demands the development novel catalysts and techniques to remove soot from exhaust gas. Three-dimensionally ordered macroporous SmMn2O5 (3DOM SMO) mullite with large pore sizes interconnected frameworks were designed synthesized successfully by applying carboxyl-modified colloidal crystal templates, tested for combustion reaction. catalytic performance was evaluated using temperature-programmed oxidation (TPO) reaction technology under “loose” contact conditions. Meanwhile, physical chemical properties characterized means XRD, SEM, BET, XPS, O2-TPD H2-TPR. thermostability polymer templates investigated TG measurements. results SEM images showed that template CPMMA-5% exhibited desirable decomposition temperature hexagonal close-packed structure. 3DOM SMO prepared as overall highest activity combustion. corresponding T50 366 °C CO2 selectivity 99.5%. H2-TPR measurements indicated higher mobility better reducibility surface adsorbed oxygen on sample than other specimens, leading its enhanced performance.
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