Reaction Activity of CaO Particles Prepared by Calcination of Some CaCO3 Materials
Reaction Activity of CaO Particles Prepared by Calcination of Some CaCO3 Materials
复制标题
部分CaCO3材料煅烧制备CaO颗粒的反应活性
DOI：
10.1252/jcej.37.815
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发表时间：
2004
影响因子：
0.8
通讯作者：
H. Kage
中科院分区：
文献类型：
--
作者：
Shokrat Abliz;O. Fujioka;H. Ogura;H. Kage
从世界能源和环境问题的角度来看，化学热泵技术的发展及其实际应用是必要的。提出了一种利用可逆氧化钙/水反应体系的化学热泵，以提高热能利用率。本文研究了石灰、扇贝和珊瑚粉三种CaCO_3材料对CaO/Ca（OH）_2水化/脱水反应的活性，探讨了扇贝和珊瑚粉作为石灰石替代物的可能性，并通过煅烧三种CaCO_3材料制备了CaO颗粒作为反应物。采用强制对流密闭系统反应器，研究了石灰、珊瑚粉和扇贝粉组成基本相同，但水化转化率不同的CaCO 3源对CaO/Ca（OH）2体系水化和脱水反应活性的影响。特别是扇贝粉的反应性与其他两种材料相比相当低。然而，这些水化转化率之间的差异消失的重复的水化/脱水反应。通过重复反应制备的三种材料的水化转化率与作者提出的模型计算的水化转化率吻合较好。扇贝经重复反应制得的CaO的反应能力几乎与石灰和珊瑚煅烧制得的CaO一样高。
From the viewpoints of energy and environmental problems in the world, development of chemical heat pump technology and its practical uses are required. A chemical heat pump using a reversible calcium oxide/water reaction system has been proposed to promote thermal energy utilization. In this report three CaCO3 materials, namely, lime, scallop and coral powder, were examined on the reactivity of the hydration/dehydration of CaO/Ca(OH)2 and the possibility of scallop and coral as the alternates of limestone was discussed.CaO particles used as a reactant were prepared by the calcination of the three CaCO3 materials. The difference of the CaCO3 resource in the hydration and the dehydration reactivity of the CaO/Ca(OH)2 system was studied by the use of a closed system reactor with forced convection.The compositions of the lime, coral and scallop powder were almost the same, while hydration conversions of the three materials were different from each other. Especially the reactivity of the scallop powder was considerably low in comparison with the other two materials. However, the difference among these hydration conversions disappeared by the repetition of hydration/dehydration reactions. The hydration conversions of three materials prepared by the repetition of reactions agreed well with one calculated by a model proposed by the authors. CaO made from the scallop with reaction repetition has almost as high a reaction capacity as CaO made by calcination of lime and coral.
影响因子：
0.4
作者：
裕直 小倉;光俊 宮崎;仁樹 松田;昌信 架谷;梁取 美智雄;正義 平松
通讯作者：
裕直 小倉;光俊 宮崎;仁樹 松田;昌信 架谷;梁取 美智雄;正義 平松