School of Environment, Tsinghua University, Beijing 100084, China.
J Environ Sci (China). 2013 Apr 1;25(4):735-40. doi: 10.1016/s1001-0742(12)60142-9.
The influence of CO2 content and presence of SO2 on the sequestration of CO2 by municipal solid waste incinerator (MSWI) fly ash was studied by investigating the carbonation reaction of MSWI fly ash with different combinations of simulated flue gas. The reaction between fly ash and 100% CO2 was relatively fast; the uptake of CO2 reached 87 g CO2/kg ash, and the sequestered CO2 could be entirely released at high temperatures. When CO2 content was reduced to 12%, the reaction rate decreased; the uptake fell to 41 g CO2/kg ash, and 70.7% of the sequestered CO2 could be released. With 12% CO2 in the presence of SO2, the reaction rate significantly decreased; the uptake was just 17 g CO2/kg ash, and only 52.9% of the sequestered CO2 could be released. SO2 in the simulated gas restricted the ability of fly ash to sequester CO2 because it blocked the pores of the ash.
研究了 CO2 含量和 SO2 存在对城市固体废物焚烧（MSWI）飞灰中 CO2 捕集的影响，通过考察不同模拟烟气组合下 MSWI 飞灰的碳酸化反应来研究这一影响。飞灰与 100% CO2 的反应相对较快；CO2 的吸收率达到 87 g CO2/kg 灰，并且捕集的 CO2 可以在高温下完全释放。当 CO2 含量降低到 12%时，反应速率降低；CO2 的吸收率降至 41 g CO2/kg 灰，其中 70.7%的捕集 CO2 可以释放。在 12% CO2 存在 SO2 的情况下，反应速率显著降低；CO2 的吸收率仅为 17 g CO2/kg 灰，其中 52.9%的捕集 CO2 可以释放。模拟气体中的 SO2 限制了飞灰捕集 CO2 的能力，因为它堵塞了灰的孔隙。
