Open AccessStudy of Ni(0)/La2O3 perovskite coated on monolith substrates as a promising catalyst for CO2 dry reforming with steam reforming of methane in syn-gas production
Author(s) -
Tri Tran Van,
Phuong Ngo Thuy,
Quan Ha Luu Manh,
Thuy Luong Ngoc,
Tuan Phan Trung,
N. Le Phuc
Publication year - 2021
Publication title -
xúc tác và hấp phụ
Language(s) - English
Resource type - Journals
ISSN - 0866-7411
DOI - 10.51316/jca.2021.018
Subject(s) - monolith , cordierite , space velocity , catalysis , calcination , methane , perovskite (structure) , chemical engineering , steam reforming , materials science , lanio , methane reformer , hydrogen production , chemistry , selectivity , organic chemistry , optoelectronics , dielectric , engineering , ferroelectricity
Coated monolith/foam catalysts are promising materials for chemistry applications due to structured reactor configuratiions providing low expansion coefficient, good thermal stability and low pressure loss. In this study, powedered Ni(0)/La2O3 catalysts in perovskite structures, were deposited on cordierite monolith substrates (2MgO-2Al2O3-5SiO2) by dip-coating method. The catalysts were characterized by N2 adsorption, XRD, TPR-H2 analysis. The activity of structured catalysts with various powder loadings (4, 8, 12, 20 and 30 wt %) were evaluated in combined Steam-CO2 reforming reaction (CH4/CO2/H2O = 2/1/2 vol%) at GHSV = 60.000 h-1. XRD and TPR results showed that the active phase LaNiO3 were mainly Ni and La2O3distributed on the surface of cordierite channels after air calcination of 850oC, 3 hours and hydrogen reduction of 600oC, 2 hours . The conversion of methane and CO2 on monolith catalysts, with proper active sites loadings of 12 – 20 wt%, were close to 80 vol% at 800oC. At the same reaction amount of active sites, the feedstock conversion on LaNiO3/monolith (12 %wt LaNiO3/monolith) was significantly higher than on corresponding powdered type, respectively 1.6 times of CH4, 1.8 times of CO2 conversion.