Synthesis of calcium-based, Al2O3-stabilized sorbents for CO2 capture using a co-precipitation technique
Synthesis of calcium-based, Al2O3-stabilized sorbents for CO2 capture using a co-precipitation technique
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DOI：
10.1016/j.ijggc.2013.01.046
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发表时间：
2013-07
影响因子：
3.9
通讯作者：
A. Kierzkowska;L. Poulikakos;M. Broda;C. Müller
中科院分区：
文献类型：
--
作者：
A. Kierzkowska;L. Poulikakos;M. Broda;C. Müller
采用共沉淀法合成了ca基、al2o3稳定的co2捕集剂。采用扫描电子显微镜、x射线衍射和n2吸附分析对吸附剂的化学组成和形貌进行了表征。在热重分析仪上研究了合成材料的循环co2吸收量，并与石灰石进行了比较。研究发现，钙前驱体和沉淀剂强烈影响沉淀吸附剂的化学组成和形态，进而影响它们的循环co2吸收能力。以Ca(NO3)2为钙前驱体合成的吸附剂，在pH 9.7下用（NH4） 2co3沉淀，经过30次煅烧和碳化，吸附剂的循环co2吸收量为0.36g /g，优于石灰石吸附剂的0.20g /g。
Co-precipitation was employed to synthesize Ca-based, Al2O3-stabilized sorbents for CO2capture. The chemical composition and morphology of the sorbents were characterized using scanning electron microscopy, X-ray diffraction and N2adsorption analysis. The cyclic CO2uptake of the materials synthesized was studied in a thermo-gravimetric analyzer and compared to limestone. It was found that the calcium precursor and precipitation agent strongly influenced the chemical composition and morphology of the precipitated sorbents and, in turn, their cyclic CO2uptake capabilities. The sorbent which was synthesized using Ca(NO3)2as the calcium precursor, and precipitated with (NH4)2CO3at pH 9.7 showed the best cyclic CO2uptake capability, viz. 0.36gCO2/g sorbent after 30 cycles of calcination and carbonation, a value which compares favorably to the CO2uptake of limestone of 0.20gCO2/g sorbent.