Effect of Fe substitution on the partial oxidation of methane to syngas over La$_{0.7}$Sr$_{0.3}$Co$_{1-y}$Fe$_{y}$O$_{3-\delta}$ perovskites

Authors

ADILAH ALIYATULMUNA
PERRY BURHAN
BAMBANG PRIJAMBOEDI
HAMZAH FANSURI
IRMINA KRIS MURWANI

DOI

10.3906/kim-1811-26

Abstract

In this research, a series of La$_{0.7}$Sr$_{0.3}$Co$_{1-y}$Fe$_{y}$O$_{3-\delta }$ ($y =$ 0.0--0.4) was successfully synthesized by a solid-state reaction method and syngas production studies were performed using gas chromatography. Thermogravimetric analysis characterized the concentration of Fe$^{3+}$, which gave a low H$_{2}$/CO ratio over La$_{0.7}$Sr$_{0.3}$Co$_{1-y}$Fe$_{y}$O$_{3-\delta }$ without the presence of molecular oxygen. All samples possessed a purely rhombohedral structure. The incorporation of more Fe increased the lattice parameter and changed XRD peaks of the La$_{1-x}$Sr$_{x}$Co$_{0.8}$Fe$_{0.2}$O$_{3}$ from sharp and single to double. Among the catalyst powders tested for syngas production activity, La$_{0.7}$Sr$_{0.3}$Co$_{0.6}$Fe$_{0.4}$O$_{3-\delta }$ ($y =$ 0.4) had the low molar ratio of H$_{2}$/CO with high content of Fe$^{3+}$ at 850 \textdegree C.

Keywords

Cobalt, Fe$^{3+}$, H$_{2}$/CO, nonstoichiometry, solid-state reaction

First Page

741

Last Page

749

Recommended Citation

ALIYATULMUNA, ADILAH; BURHAN, PERRY; PRIJAMBOEDI, BAMBANG; FANSURI, HAMZAH; and MURWANI, IRMINA KRIS (2019) "Effect of Fe substitution on the partial oxidation of methane to syngas over La$_{0.7}$Sr$_{0.3}$Co$_{1-y}$Fe$_{y}$O$_{3-\delta}$ perovskites," Turkish Journal of Chemistry: Vol. 43: No. 3, Article 1. https://doi.org/10.3906/kim-1811-26
Available at: https://journals.tubitak.gov.tr/chem/vol43/iss3/1