The interaction effect of catalyst and ash on diesel soot oxidation by thermogravimetric analysis

被引：53

作者：

Fang, Jia ^{[1
,2
]}

Shi, Rong ^{[2
]}

Meng, Zhongwei ^{[1
,2
]}

Jiang, Yuan ^{[2
]}

Qin, Zihan ^{[2
]}

Zhang, Qian ^{[2
]}

Qin, Yuan ^{[2
]}

Tan, Jie ^{[2
]}

Bai, Weilian ^{[2
]}

机构：

[1] Xihua Univ, Sch Energy & Power Engn, Key Lab Fluid & Power Machinery, Minist Educ, Chengdu 610039, Sichuan, Peoples R China

[2] Xihua Univ, Sch Automobile & Transportat, Vehicle Measurement Control & Safety Key Lab Sich, Chengdu 610039, Sichuan, Peoples R China

来源：

FUEL | 2019年 / 258卷

基金：

中国国家自然科学基金;

关键词：

Soot oxidation; Catalyst; Ash; Thermogravimetric analysis; PARTICULATE FILTER; CARBON-BLACK; EMISSION CHARACTERISTICS; CHEMICAL-COMPOSITION; REGENERATION; PERFORMANCE; COMBUSTION; MATTER; REACTIVITY; KINETICS;

D O I：

10.1016/j.fuel.2019.116151

中图分类号：

TE [石油、天然气工业]; TK [能源与动力工程];

学科分类号：

0807 ; 0820 ;

摘要：

The interaction effect of catalyst and ash on commercial carbon black (Printex U, PU) oxidation is investigated using non-isothermal thermogravimetric analysis (TGA). The presence of commercial catalysts TiO2 and CeO2 decrease the start, peak and end temperatures of soot oxidation, and increase the comprehensive oxidation index. Compared with PU/TiO2 mixture, PU/CeO2 mixture has lower activation energy and higher comprehensive oxidation index because CeO2 has the higher oxygen storage and better active oxygen generation capacities. The impact of CeO2 is shown to be the most significant at 1:5 wt ratio between soot and catalyst among various ratios. Compared with pure PU, the comprehensive oxidation index for 1:5 wt ratio of PU/CeO2 increases from 0.97*10(-7) %(2) min(-2) degrees C-3 to 1.58*10(-7) %(2) min(-2) degrees C-3. The comprehensive oxidation index can further increase by adding ashes. Compared with PU/CeO2/Al2O3, PU/CeO2/MgO and PU/CeO2/CaSO4 mixtures, PU/CeO2/ZnO mixture has the maximum comprehensive oxidation index. The most significant impact of potential ash on PU/CeO2 is observed with 1:5:5 wt ratio of PU/CeO2/ZnO among soot, catalyst and ash, which has the maximum comprehensive oxidation index 2.41*10(-7) %(2) min(-2) degrees C-3. The comprehensive oxidation index of 1:5:5 wt ratio of PU/CeO2/ZnO increases by 148% compared with pure PU. This work is beneficial to demonstrate the interaction mechanism of the catalyst and ash on soot oxidation process under O-2/N-2 atmosphere.

引用

页数：8

共 30 条

[1] Understanding Chemical Composition and Phase Transitions of Ash from Field Returned DPF Units and Their Correlation with Filter Operating Conditions [J].