H2S-resistant CeO2-NiO-MgO-Al2O3 LDH-derived catalysts for steam reforming of toluene

Recently, biomass gasification has garnered a lot of attention due to its potential produce hydrogen-rich syngas. In this research paper, H2S resistant catalysts for steam reforming toluene as model tar compound is studied on CeO2-NiO-MgO-Al2O3 (Ce-NMA) hydrotalcite-derived synthesized by homogeneous urea hydrolysis. A family Ce-NMA were with different Ce loading: 0Ce-NMA, 5Ce-NMA, 10Ce-NMA, 15Ce-NMA and 20Ce-NMA. Among all the catalysts, performance improved up 15Ce-NMA, which showed most stable in presence poison. The H2-TPR XPS that ceria reducibility facilitating electron transfer nickel. gave conversion 82%, whereas 20Ce-NMA 96% conversion. However, recovery was very quick (30-45min) against 20Ce-NMA, deactivated 40% took 2 h recover performance. reduced Ni0/Ni2+ ratio constantly increased increasing loading Ce3+/Ce4+ redox pairs, aided reduction Ni2+ Ni0. TG/DTA analysis revealed highest amount carbon formed over 0Ce-NMA meaning only effective till certain amount. demonstrated lower deposition compared Raman type varied graphitic decreased but suddenly leading higher activity catalyst.