Reactivity Improvement of Ca-Based CO2 Absorbent Modified with Sodium Humate in Cyclic Calcination/Carbonation | Zendy

Luhan Chen | Zendy; Zhiguo Sun | Zendy; Jinqiu Xu | Zendy; Menglu Wang | Zendy; Jiaming Fan | Zendy; Li Zhang | Zendy

AI Assistant Blog Pricing

Home ZAIA Blog

Open Access

Reactivity Improvement of Ca-Based CO₂ Absorbent Modified with Sodium Humate in Cyclic Calcination/Carbonation

Author(s) -

Luhan Chen,

Zhiguo Sun,

Jinqiu Xu,

Menglu Wang,

Jiaming Fan,

Li Zhang

Publication year - 2020

Publication title -

acs omega

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.779

H-Index - 40

ISSN - 2470-1343

DOI - 10.1021/acsomega.0c00487

Subject(s) - carbonation , calcination , sorbent , sodium , materials science , chemistry , nuclear chemistry , chemical engineering , mineralogy , inorganic chemistry , adsorption , catalysis , metallurgy , composite material , organic chemistry , engineering

The Ca-based sorbent cyclic calcination/carbonation reaction (CCCR) is a high-efficiency technique for capturing CO 2 from combustion processes. The CO 2 capture ability of CaO modified with sodium humate (HA-Na) (HA-Na/CaO) in long-term calcination/carbonation cycles was investigated. The enhancement mechanism of HA-Na on CCCR was proposed and demonstrated. The effects of carbonation temperature, reaction duration, and the addition amount of HA-Na on the carbonation rate of the CaO adsorbent were also studied. HA-Na/CaO is allowed to react 20 min at the optimum conditions for calcination (920 °C, 100% N 2 ) and for carbonation (700 °C, 15% CO 2 , 85% N 2 ), respectively. HA-Na plays a key role in the CCCR process, and the carbonation conversion rate is lifted obviously. The maximum conversion rate of HA-Na/CaO is 23% higher than that of CaO in the first cycle. After 20 cycles, the conversion rate of HA-Na/CaO is still 0.28, while that of CaO is only 0.15. The carbonation conversion rate for HA-Na/CaO is improved by 86% compared to CaO. In addition, the characteristics of calcined sorbents are analyzed by scanning electron microscopy (SEM), X-ray diffraction (XRD), and Brunauer-Emmett-Teller (BET) methods.

The content you want is available to Zendy users.

Already have an account? Click here to sign in.

Having issues? You can contact us here

Accelerating Research