The reaction of hydrogen sulfide with trona and calcium oxide in the presence of char started as soon as microwave energy was applied. However, with conventional heating, the reaction started only when the bed temperature reached approximately 540-degrees-C. Char absorbing microwave energy is rapidly heated to very high temperatures, enhancing the H2S reaction with oxides contained in char or oxides added to char in the reaction. A 100% conversion of trona was achieved but the maximum conversion of calcium oxide was only 79%. The minimum content of char required to induce the reaction of H2S with trona using microwave energy was 20% of char-trona mixture. When the trona content in the mixture of char-trona mixture was greater than 50%, an additional conversion of H2S occurred to produce some amount of elemental sulfur that was deposited in the bed. This clearly demonstrates that char combined with microwave induces H2S reaction with mineral oxides.