To develop a new process for reducing SO₂ to elemental sulfur, the reduction of SO₂ with carbon materials heated by electrical and microwave were investigated on a fixed bed experimental system. The effects of carbon species, temperature, SO₂ concentration and C/SO₂ molar ratio on SO₂ reduction were studied. The results showed that coconut shell activated carbon has the best reduction effect among the six carbon materials. With the increase of reaction temperature, the X_SO2 gradually increased. However, the Y_S rapidly decreased at 800°C and reached a minimum value of only 55 % at 900℃. The X_SO2 increased with the increase of C/S mole ratio, but the Y_S showed a different trend according to the different reaction temperature. By comparing the effects of microwave heating and electrical heating on the reduction of SO₂, the much lower temperature was required to obtain the same X_SO2 under microwave heating than that under electrical heating. Also for the S_S, the results obtained under microwave heating were higher than that of electrical heating. When the reaction temperature was 950℃, X_SO2 was about 98 % under both heating modes. However, Y_S under microwave heating was 95 %, while Y_S under electrical heating was only 85 %.

为了开发一种将SO ₂还原为元素硫的新方法，在固定床实验系统上研究了用电和微波加热的碳材料还原SO _2的方法。研究了碳的种类，温度，SO ₂浓度和C / SO ₂摩尔比对SO ₂还原的影响。结果表明，椰壳活性炭在六种碳材料中还原效果最好。随着反应温度的升高，X _SO2逐渐增加。然而，Y _S在800℃迅速下降，在900℃达到最小值的55％。该X _SO2随C / S摩尔比的增加而增加，但Y _S随反应温度的不同呈现出不同的趋势。通过比较微波加热和电加热对SO ₂还原的影响，与电加热相比，在微波加热下获得相同的X _SO2所需的温度要低得多。同样对于S _S，在微波加热下获得的结果高于电加热的结果。当反应温度为950℃时，两种加热模式下的X _SO2均约为98％。但是，微波加热下的Y _S为95％，而Y _S 在电加热下仅为85％。