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Oxidative Coupling of Methane using A2B2O7 catalysts

Grant number: 19/10980-9
Support type:Scholarships in Brazil - Post-Doctorate
Effective date (Start): July 01, 2019
Effective date (End): June 30, 2022
Field of knowledge:Engineering - Chemical Engineering - Chemical Process Industries
Principal Investigator:Elisabete Moreira Assaf
Grantee:Davi Domingos Petrolini
Home Institution: Instituto de Química de São Carlos (IQSC). Universidade de São Paulo (USP). São Carlos , SP, Brazil
Associated research grant:15/06246-7 - Biorefinery concept applied to biological wastewater treatment plants: environmental pollution control coupled with material and energy recovery, AP.TEM
Associated scholarship(s):19/26419-4 - Oxidative coupling of methane using A2B2O7 catalysts, BE.EP.PD

Abstract

Studies exploring the enhancement of catalytic systems for the conversion of methane into higher value-added chemicals have been received attention due to large natural gas reserves and the reduction of fossil fuel. In this perspective, the oxidative coupling of methane demonstrates to be interesting to produce ethylene, for example. It is known that ethylene plays a key role in the production of most petrochemicals. Among the various catalysts applied for this reaction, the A2B2O7 compounds appear to have excellent thermal stability, resistance to sintering of substituted metals and high oxygen mobility, which offers great potential for the oxidative coupling reaction. On this way, we intend to perform the oxidative coupling reaction of the methane on A2B2O7 type catalysts, making modifications in the method of preparation, in the ratio/substitution of the cations according to the formula La2-xMxCe2O7 (M = Sr, Ca or Pr, for instance) and La2Ce2-xMxO7 (M = Mg or Mn, for instance) to modify the acid-base properties, facilitate the surface oxygen mobility, obtain a catalyst with stability over the reaction time and to clarify the identity and function of the active sites in the catalytic performance. The reaction parameters such as temperature, pressure and space velocity will also be evaluated with the objective of optimizing the catalytic activity and selectivity to ethylene.