热再生是在废颗粒活性炭（GAC）上进行的，该活性炭已在水处理厂使用了大约四年，含钙量为1.8%。氧化是在650-950C的蒸汽、CO2或蒸汽加CO2中进行的。如前一篇文章所述，当同时使用蒸汽和二氧化碳时，再生产品的孔结构在高温（大于800摄氏度）下比在低温（小于750摄氏度）下保持更大的微孔体积。本文的工作将这种区别与反应速率限制的差异联系起来:在高温下，两种氧化剂同时使用时，水煤气变换反应（H2O+CO=H2+CO2）限制了总速率，而在低温下，C（O）气化步骤限制了总速率。水煤气变换反应产生的二氧化碳作为主要氧化剂。尽管蒸汽只是一种二次氧化剂，但它的存在也促进了氧化剂更广泛地转移到碳表面。

Thermal regenerations were conducted on a spent granular activated carbon (GAC) that had served in a water treatment plant for about four years, and contained 1.8 percent calcium. Oxidation was conducted in steam, CO2, or steam plus CO2 at 650-950C. As described in an earlier article, when both steam and CO2 were employed together, the regenerated product's pore structure maintained greater micropore volume at high temperatures (greater than 800C) than at low temperatures (less than 750C). The work herein has linked this distinction to differences in reaction rate limitations: at high temperatures, with both oxidants employed together, the water-gas shift reaction (H2O + CO = H2 + CO2) limited overall rate, whereas at low temperatures, the C(O) gasification step limited overall rate. The CO2 created by the water gas shift reaction served as the primary oxidant. Although steam served only as a secondary oxidant, its presence also facilitated more extensive oxidant transfer to the carbon surface.