The Influence of Temperature on the Shape, Quality, and Activity of the Recycled Oyster Shell Catalyst for the Oxidative Coupling of Methane Process
Main Article Content
Abstract
Hundreds of catalysts have been explored and developed for the oxidative coupling of methane process, most of which come from commercial chemicals, rare metals, and expensive materials that are not available and contain toxic chemicals. With the richness of nature, sources from biomass and sustainable materials are gradually being developed as substitutes. This work focuses on the conditions for synthesizing CaO from oyster shells, an abundant and available raw material, as well as a waste source that has not yet been fully utilized. The catalysts synthesized from these oyster shells were treated under different conditions to produce materials with different characteristics. All synthesized catalysts from oyster shells have a higher selectivity for hydrocarbons than the commercial CaO powder. Oyster shells heated up to 950 °C under continuous air flow were the most active catalyst, achieving a hydrocarbon selectivity of approximately 70.3% when the reaction was carried out at 750 °C. This exceptional selectivity comes from the strong basicity available in oyster shells, which increases the oxygen mobility and easily helps react. The catalysts were also evaluated for stability at 750 °C for 225 min with good results.
Keywords
Alkali metals, catalysts, methane, oyster shells, sustainable source
Article Details
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