Guangdong Province Key Laboratory of Efficient and Clean Energy Utilization, School of Electric Power, South China University of Technology, 510640 Guangzhou, China.
Guangdong Province Key Laboratory of Efficient and Clean Energy Utilization, School of Electric Power, South China University of Technology, 510640 Guangzhou, China.
Bioresour Technol. 2019 Jan;271:251-257. doi: 10.1016/j.biortech.2018.09.109. Epub 2018 Sep 21.
Performance of natural and modified calcium-based sorbents for heavy metals for food waste under oxy-fuel combustion in a lab-scale tubular furnace was carried out. The effects of furnace temperature, sorbents type, and CO/O ratio on adsorption of heavy metals were investigated. Increasing the furnace temperature helped fixing Al in the bottom ash, but increased the volatilization of Zn. The results showed that heavy metals captured by sorbents highly depended on the metals types. Nature and modified CaO had excellent performance for Al capture while CaCO could not absorb Al. Neither CaCO or CaO could not use as sorbents for the Cr capture. CO/O ratio highly affected the capture of Cr and Zn but had no influence on Al, and the decrease of CO/O ratio would help capturing Cr and Zn. This work contributes to the heavy metals controlled by Ca-based sorbents during municipal solid waste oxy-fuel combustion.
在实验室规模的管式炉中，对含氧燃料燃烧下食品废物中天然和改性钙基吸附剂对重金属的性能进行了研究。考察了炉温、吸附剂类型和 CO/O 比对重金属吸附的影响。提高炉温有助于固定底灰中的 Al，但增加了 Zn 的挥发。结果表明，吸附剂捕获的重金属高度依赖于金属类型。天然和改性 CaO 对 Al 的捕集性能优异，而 CaCO 不能吸收 Al。CaCO 或 CaO 都不能用作 Cr 的吸附剂。CO/O 比对 Cr 和 Zn 的捕集有很大影响，但对 Al 没有影响，降低 CO/O 比有助于捕集 Cr 和 Zn。这项工作有助于控制城市固体废物含氧燃料燃烧过程中 Ca 基吸附剂对重金属的控制。
