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首页> 外文期刊>RSC Advances >Microwave catalyzed carbothermic reduction of zinc oxide and zinc ferrite: effect of microwave energy on the reaction activation energy
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Microwave catalyzed carbothermic reduction of zinc oxide and zinc ferrite: effect of microwave energy on the reaction activation energy

机译：微波催化氧化锌和锌铁氧体的碳热还原：微波能量对反应活化能的影响

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Recently, more attention has been paid to the use of microwave (MW) energy in accelerating chemical reactions. The effect of microwave energy on the reduction of zinc oxide and zinc ferrite was investigated. The results indicated that the temperatures required to initiate zinc oxide and zinc ferrite reduction under MW heating were 550 and 450 °C, respectively, while under conventional thermal (CT) heating, were 950 and 850 °C, respectively. Apparently, the MW reaction had a negative standard Gibbs free energy (Δ G ) at a lower temperature (～400 °C) when compared to the CT reaction. Additionally, the activation energy ( E _(a) ) substantially decreased from 223.7 and 221.1 kJ mol ~(?1) under CT heating to 64.8 and 32.9 kJ mol ~(?1) under MW heating for Zn oxide and zinc ferrite, respectively. The enhancement in zinc reduction under MW energy was due to the rapid and bulk heating phenomena of MWs as well as the interactions occurring between the electromagnetic MW pattern and the molecules of heated materials.
机译：最近，在加速化学反应时，使用微波（MW）能量的更多关注。研究了微波能量对氧化锌和锌铁素体还原的影响。结果表明，在MW加热下引发氧化锌和锌铁氧体降低所需的温度分别为550和450℃，而在常规的热（CT）加热下，分别为950和850℃。显然，与CT反应相比，MW反应在较低温度（〜400℃）下具有负标准GIBBS自由能（δg）。另外，在CT加热的CT加热下的223.7和221.1kjmol〜（α1）分别在MW加热下，分别在CT加热下的223.7和221.1kJmol〜（α1）下显着降低至64.8和32.9kJmol〜（α1）。 。 MW能量下锌的增强是由于MWS的快速和散装加热现象以及电磁MW图案和加热材料分子之间发生的相互作用。

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