Effect of Ce, Zr on cyclic performance of CaO-based CO<sub>2</sub> sorbents

ZHANG Lei; ZHANG Li; YAN Yunfei; YANG Zhongqing; GUO Mingnü

doi:10.11949/j.issn.0438-1157.20141071

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Effect of Ce, Zr on cyclic performance of CaO-based CO₂ sorbents

更新时间：2025-12-10

- Effect of Ce, Zr on cyclic performance of CaO-based CO₂ sorbents
- CIESC Journal Issue 2, Pages: 612-617(2015)
- 作者机构：
  
  1. 低品位能源利用技术及系统教育部重点实验室(重庆大学),重庆,400044
  2. 重庆大学动力工程学院,重庆,400044
- 作者简介：
- 基金信息：
- DOI：10.11949/j.issn.0438-1157.20141071
  CLC： K09
- Online First：05 February 2015，
  
  Published：05 February 2015
- 稿件说明：
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ZHANG Lei, ZHANG Li, YAN Yunfei, et al. Effect of Ce, Zr on cyclic performance of CaO-based CO₂ sorbents[J]. CIESC Journal, 2015, (2): 612-617. DOI: 10.11949/j.issn.0438-1157.20141071.
DOI：

ZHANG Lei, ZHANG Li, YAN Yunfei, et al. Effect of Ce, Zr on cyclic performance of CaO-based CO₂ sorbents[J]. CIESC Journal, 2015, (2): 612-617. DOI: 10.11949/j.issn.0438-1157.20141071. DOI：

摘要

利用湿法混合-煅烧法将元素Ce、Zr掺杂到CO2钙基吸附剂中

利用热重分析仪(TGA)研究了24种改性钙基吸附剂吸附CO2的循环特性。研究发现:CeO2散布在CaO晶粒之间可抑制晶粒融合

对吸附剂烧结有一定的阻碍作用;CeO2可明显提高吸附剂在扩散控制阶段对CO2的吸附速率

原因在于CeO2中丰富的氧空位可促进CO2以离子迁移的方式穿过表面产物层到达内部与CaO反应;吸附剂中CeO2含量越高

稳定性越强;ZrO2与CaO高温化合成具有高塔曼温度的CaZrO3

均匀分散在CaO晶粒间

构成稳固的支撑骨架

有效抑制了吸附剂烧结。

Abstract

CaO-based sorbents with Ce and Zr as dopants were prepared by the method of wet mixing and subsequent calcination. The cyclic CO2 sorption/desorption performance of 24 sorbents was tested with thermogravimetric analyzer (TGA). CeO2 could increase CO2 sorption rate in the diffusion-controlled regime because the large quantity of oxygen vacancies in CeO2 could facilitate CO2 diffusion through the produced CaCO3 layer and then react with the uncreated CaO. Dispersion of CeO2 on CaO could also inhibit agglomeration of CaO crystal and its sintering at high temperature. Stability of CaO in sorption/desorption cycle increased with increasing amount of CeO2 in the sorbents. With a high Tammann temperature

the newly produced CaZrO3 from zirconia and calcium oxide could serve as a supporting framework and effectively restrain sintering.

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Effect of Ce, Zr on cyclic performance of CaO-based CO2 sorbents

DOI：10.11949/j.issn.0438-1157.20141071

摘要

Abstract

关键词

Keywords

references

Effect of Ce, Zr on cyclic performance of CaO-based CO₂ sorbents