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Optimum design and characteristics of potassium-based sorbents using SiO2 for post-combustion CO2 capture
Renewable Energy ( IF 9.0 ) Pub Date : 2019-12-01 , DOI: 10.1016/j.renene.2018.10.057
Min Sun Cho , Soo Chool Lee , Ho Jin Chae , Yong Mok Kwon , Hyun Ji Kim , Min Young Ryu , Joong Beom Lee , Jae Chang Kim

Abstract SiO2 is a common material and is used in various industrial fields. However, the potassium-based sorbents using SiO2 as a support have the low CO2 capture capacities. In this study, the CO2 sorption and regeneration properties of potassium-based sorbents using SiO2 as a support were investigated to determine the cause of the low CO2 capture capacities. In addition, an optimum design method of the potassium-based sorbents using SiO2 as a support having excellent performance was proposed. The CO2 capture capacities of the sorbents decreased as the calcination temperature increased from 500 °C to 700 °C owing to the disappearance of the active material (K2CO3) through the formation of inactive components, such as K2Si2O5 and K2Si4O9. On the other hand, the potassium-based sorbent using SiO2 calcined at 500 °C had a high CO2 capture capacity of 152.3 mg CO2/g sorbent and excellent regeneration properties under the process simulation conditions. Control of the calcination temperature and the mole ratio of K2CO3 to SiO2 was important for obtaining the sorbents with a high CO2 capture capacity. Consequently, SiO2 can be used as a support or additive material in the design of potassium-based sorbents with a high CO2 capture capacity and excellent regeneration properties for post-combustion CO2 capture by controlling the amount of inactive component formed in the calcination process.

中文翻译:

使用 SiO2 进行燃烧后 CO2 捕集的钾基吸附剂的优化设计和特性

摘要 SiO2 是一种常见的材料,用于各种工业领域。然而,使用 SiO2 作为载体的钾基吸附剂的 CO2 捕获能力较低。在这项研究中,研究了使用 SiO2 作为载体的钾基吸附剂的 CO2 吸附和再生特性,以确定 CO2 捕获能力低的原因。此外,提出了一种性能优异的以SiO2为载体的钾基吸附剂的优化设计方法。由于活性材料 (K2CO3) 通过形成非活性组分(如 K2Si2O5 和 K2Si4O9)而消失,吸附剂的 CO2 捕获能力随着煅烧温度从 500 °C 升高到 700 °C 而降低。另一方面,使用 SiO2 在 500 °C 下煅烧的钾基吸附剂在工艺模拟条件下具有 152.3 mg CO2/g 吸附剂的高 CO2 捕获能力和出色的再生性能。控制煅烧温度和 K2CO3 与 SiO2 的摩尔比对于获得具有高 CO2 捕获能力的吸附剂很重要。因此,通过控制煅烧过程中形成的非活性组分的量,SiO2 可用作设计钾基吸附剂的载体或添加剂材料,该吸附剂具有高 CO2 捕集能力和优异的燃烧后 CO2 捕集再生性能。控制煅烧温度和 K2CO3 与 SiO2 的摩尔比对于获得具有高 CO2 捕获能力的吸附剂很重要。因此,通过控制煅烧过程中形成的非活性组分的量,SiO2 可用作设计钾基吸附剂的载体或添加剂材料,该吸附剂具有高 CO2 捕集能力和优异的燃烧后 CO2 捕集再生性能。控制煅烧温度和 K2CO3 与 SiO2 的摩尔比对于获得具有高 CO2 捕获能力的吸附剂很重要。因此,通过控制煅烧过程中形成的非活性组分的量,SiO2 可用作设计钾基吸附剂的载体或添加剂材料,该吸附剂具有高 CO2 捕集能力和优异的燃烧后 CO2 捕集再生性能。
更新日期:2019-12-01
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