SO2 Retention by CaO-Based Sorbent Spent in CO2 Looping Cycles
SO2 Retention by CaO-Based Sorbent Spent in CO2 Looping Cycles
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DOI：
10.1021/ie9002365
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发表时间：
2009-06
影响因子：
4.2
通讯作者：
V. Manović;E. Anthony;D. Lončarević
中科院分区：
文献类型：
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作者：
V. Manović;E. Anthony;D. Lončarević
在合成气和烟气中捕集二氧化碳方面，基于cao的循环是一种很有前途的方法。该技术基于双流化床反应器中CaO的循环碳化和CaCO3的再生，以产生适合封存的纯CO2流。天然吸附剂的主要限制是随着反应循环次数的增加而丧失承载能力，从而导致需要额外的吸附剂，并导致使用的吸附剂浪费。本研究探讨了利用CO2循环产生的废吸附剂捕集SO2。调查了三种石灰石：凯利岩（加拿大），拉布兰卡（西班牙）和卡托维兹（波兰，上西里西亚）。碳化/煅烧循环在管式炉中进行，原始石灰石和样品经过不同时间的热处理（即烧结）。用热重分析仪（TGA）对废吸附剂样品进行硫酸处理。然后用汞孔法研究了所得吸附剂孔隙结构的变化。哈…
CaO-based looping cycles are promising processes for CO2 capture from both syngas and flue gas. The technology is based on cyclical carbonation of CaO and regeneration of CaCO3 in a dual fluidized-bed reactor to produce a pure CO2 stream suitable for sequestration. The main limitation of natural sorbents is the loss of carrying capacity with increasing number of reaction cycles, resulting in the need for extra sorbent, and subsequent spent sorbent waste. Use of spent sorbent from CO2 looping cycles for SO2 capture is investigated in this study. Three limestones were investigated: Kelly Rock (Canada), La Blanca (Spain), and Katowice (Poland, Upper Silesia). Carbonation/calcination cycles were performed in a tube furnace with both the original limestones and samples thermally pretreated for different times (i.e., sintered). The spent sorbent samples were sulfated in a thermogravimetric analyzer (TGA). The changes in the resulting sorbent pore structure were then investigated using mercury porosimetry. It ha...