Synthesis and characterization of A site doped lanthanum based perovskite catalyst for the oxidation of soot

13th Joint Conference on Chemistry

Akinlolu, Kayode^1 ; Omolara, Bangboye^1 ; Kehinde, Ogunniran^1 ; Shailendra, Tripathi^2

Covenant University, Km.10 Idiroko Road, Canaanland, Ota, Ogun State, Nigeria^1

CSIR-Indian Institute of Petroleum, Dehradun

248 005, India^2

关键词: Brunauer emmett tellers;    Citrate sol-gel method;    Inductively coupled plasma atomic emission spectroscopy;    Metal-based catalysts;    Soot oxidation;    Synthesis and characterizations;    Transmission electron;    X-ray powder diffractometers;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/509/1/012062/pdf
DOI  :  10.1088/1757-899X/509/1/012062

来源: IOP

【 摘 要 】

A sequence of La1-xCaxCoO3 (x=0, 0.2, 0.3, 0.4) perovskites catalysts (coded LAC 0, 1, 2, 3) were prepared by the modified citrate sol-gel method, and their catalytic activities for soot conversion were studied. The characterizations of the prepared catalysts were conducted by Brunauer-Emmett-Teller (BET), Inductively Coupled Plasma Atomic Emission Spectroscopy (ICP-AES), Thermogravimetric / Differential Thermogravimetric Analysis (TGA/DTG), Scanning Electron Microscopy (SEM), X-ray powder Diffractometer (XRD) and Transmission Electron Microscopy (HRTEM). It was observed that upon the introduction of Ca into the parent perovskite system, the surface area of the prepared catalyst increased. The catalytic performance evaluation of the prepared catalysts showed that upon the doping of Ca into the A-site of LaCoO3, there was about 30% improvement in the catalytic activity for soot oxidation. The best catalytic performance with soot conversion at T50 of 484°C was obtained on La0.8Ca0.2CoO3 (LAC2). The Ca doped LaCoO3 gave a better catalytic performance when compared with the classical Pt/Al2O3. This depicts that the non-noble metal based catalyst is a possible replacement for the noble metal based catalyst.