There is a significant interest in converting eggshells into value-added products. Therefore, the goal of this research is to synthesize and study iron-impregnated eggshells as a catalyst for partial oxidation of methane. The objectives of this research were to test the effects of iron loading, flow rate, oxygen concentration, and temperature on methane oxidation. The catalysts were synthesized using ferric chloride hexahydrate at various loadings and tested in a heated stainless-steel reactor under different experimental conditions. The reaction products included C₂–C₇ hydrocarbons, carbon monoxide, and carbon dioxide depending on the reaction conditions. Results indicated that iron loading beyond 5 wt% caused a decrease in methane conversion. A decrease in oxygen concentration enhanced methane conversion with a substantial drop in the production of CO₂. Besides, an increase in temperature resulted in a decrease in methane conversion with a simultaneous increase in the production of CO₂ via overoxidation. The reusability experiments indicated that the catalyst was active for four reaction cycles. Our results indicate that eggshells can be used as catalyst support for methane partial oxidation and can simultaneously solve the waste disposal problems faced by the poultry industry.

中文翻译：

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回收的蛋壳作为铁浸渍的氧化钙催化剂的前驱物，用于甲烷的部分氧化

将蛋壳转化为增值产品引起了极大的兴趣。因此，本研究的目的是合成和研究铁浸渍的蛋壳作为甲烷部分氧化的催化剂。这项研究的目的是测试铁负载，流速，氧气浓度和温度对甲烷氧化的影响。使用六水合氯化铁在不同的负载量下合成催化剂，并在不同的实验条件下在加热的不锈钢反应器中进行测试。反应产物包括C ₂ -C ₇烃，一氧化碳和二氧化碳取决于反应条件。结果表明，铁负载量超过5重量％会导致甲烷转化率降低。氧气浓度的降低提高了甲烷的转化率，而CO ₂的生成量却大幅度下降。此外，温度升高导致甲烷转化率降低，同时由于过氧化而增加了CO ₂的产量。可重用性实验表明该催化剂在四个反应循环中均具有活性。我们的结果表明，蛋壳可以用作甲烷部分氧化的催化剂载体，并且可以同时解决家禽业面临的废物处理问题。