High Temperature CaO/Y2O3 Carbon Dioxide Absorbent with Enhanced Stability for Sorption-Enhanced Reforming Applications
High Temperature CaO/Y2O3 Carbon Dioxide Absorbent with Enhanced Stability for Sorption-Enhanced Reforming Applications
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DOI：
10.1021/ie2015334
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发表时间：
2011-10
影响因子：
4.2
通讯作者：
V. Derevschikov;A. I. Lysikov;A. Okunev
中科院分区：
文献类型：
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作者：
V. Derevschikov;A. I. Lysikov;A. Okunev
为提高吸附强化重整用高温CO2吸收剂的稳定性，采用混合盐前驱体焙烧和载体湿法浸渍两种方法合成了氧化钇负载氧化钙催化剂。根据X射线衍射仪的数据，CaO不与氧化钛基质发生相互作用。然而，CaO的引入极大地改变了一次氧化钇颗粒的形貌。随着CaO浓度的增加，较小的气孔逐渐堵塞，氧化钇载体逐渐烧结。重碳分解循环的CO2吸收率随CaO含量的增加而增加，当CaO含量为19.9wt%时，CO2吸收率达到9.6wt%。CaO重碳化程度从49%到77%不等。CaO/Y2O3吸收剂在过热情况下非常稳定，即使在1350°C下焙烧后，也能在长时间的分解-再碳化循环中保持其容量。这种新型材料耐湿，在空气中储存时仍保持其强度。根据测试，CaO/Y2O_3可以认为是...
To improve the stability of high temperature CO2 absorbent for sorption enhanced reforming applications yttria supported CaO were synthesized using two methods: calcination of mixed salt precursors and wet impregnation of yttria support. According to XRD data, CaO does not interact with the yttria matrix. However, introduction of CaO drastically changes the morphology of primary yttria particles. Increase in CaO concentration results in gradual plugging of the smaller pores and sintering of yttria support. The CO2 absorption uptake in recarbonation-decomposition cycles increases with increase in CaO content and reach 9.6 wt % at CaO content of 19.9 wt %. CaO recarbonation extent varies from 49 to 77%. CaO/Y2O3 absorbents are extremely stable under overheating and maintain their capacity in long series of decomposition-recarbonation cycles even after calcination at 1350 °C. The novel material resists moisture and retains its strength during storage in the air. According to tests, CaO/Y2O3 can be considered...