Thermodynamic and mechanism study of syngas production via integration of nitrous oxide decomposition and methane partial oxidation in the presence of 10%NiO–La0.3Sr0.7Co0.7Fe0.3O3−δ
- 35 Downloads
10%NiO–La0.3Sr0.7Co0.7Fe0.3O3−δ (10%NiO-LSCF3773) was synthesized using the EDTAcitrate complexing method. Non-catalytic and catalytic nitrous oxide decomposition and methane partial oxidation using 10%NiO–LSCF3773 was experimentally studied, assuming that the reactions occurred separately in a membrane reactor at feed side and permeate side. The experimental results are in good agreement with the chemical equilibrium composition calculated using Aspen Plus, and the changes of standard Gibbs free energy of each relevant elementary reactions. The mechanism of the reactions was proposed to follow Eley–Rideal surface reaction. The optimal temperature was 800 °C, under atmospheric pressure, where (1) NO2 formation was not detected (2) no production of C2 + and C3 + (3) complete conversion of N2O, CH4 and O2 were achieved (4) high purity syngas was obtained with no significant amount of undesired products and (5) readily utilizable syngas at the ratio of two was achieved.
KeywordsNitrous oxide decomposition Partial oxidation of methane Chemical equilibrium Aspen plus NiO-doped LSCF
Grants from Thailand Research Fund (MSD5910030) and National Research Council of Thailand (KMUTNB-GOV-58-54) and (KMUTNB-GOV-59-43) are acknowledged for the support.
- 4.Vitousek PM, Aber JD, Howarth RW, Likens GE, Matson PA, Schindler DW, Schlesinger WH, Tilmen DG (1997) Human alteration of the global nitrogen cycle: sources and consequences. Ecol Appl 7:737–750Google Scholar
- 41.Smith JM, Van Ness HC, Abbott MM (2005) Introduction to chemical engineering thermodynamics, 7th edn. McGraw Hill, New YorkGoogle Scholar
- 42.Felder RM, Rousseau RW (2005) Elementary principles of chemical processes, 3rd edn. Wiley, New YorkGoogle Scholar
- 43.Yaws CL (1996) Handbook of thermodynamics diagram. Gulf Publishing Company, HoustonGoogle Scholar
- 44.Standard thermodynamic properties of chemical substances.Google Scholar
- 53.Li R, Yu C, Shen S (2002) Partial oxidation of methane to syngas using lattice oxygen of La1-xSrxFeO3 perovskite oxide catalysts instead of molecular oxygen. J Nat Gas Chem 117:137–144Google Scholar