双功能
合成气
焦炭
材料科学
化学工程
等温过程
非阻塞I/O
冶金
催化作用
化学
有机化学
热力学
物理
工程类
作者
Rui Han,Shuang Xing,Yang Wang,Lifei Wei,Zhiyong Li,Chenglong Yang,Chunfeng Song,Qingling Liu
标识
DOI:10.1016/j.seppur.2022.122808
摘要
Calcium Looping coupling with CH4 dry reforming (CaLDRM) is a promising technology to achieve CO2 capture and in-situ conversion to syngas, thereby attracting much attention recently. However, the significant coke deposition and reduced activity of the Ni-CaO based bifunctional materials hinder its practical application. In this work, low-cost MgO was utilized to promote Ni-CaO bifunctional material, which successfully drives cyclic CO2 capture and conversion. On the one hand, MgO act as a stabilizer to inhibit CaO sintering, acquiring excellent CO2 capture ability and cycle stability. After 20 cycles, the 10 wt% MgO promoted Ni-CaO bifunctional materials (Ni-Ca10Mg) maintained the CO2 capture capacity of 0.53 gCO2/gmaterial, much higher than the unmodified material. On the other hand, MgO can form NiO-MgO solid solution with NiO, bringing fine Ni particle sizes and abundant oxygen species. Thanks to the effect of NiO-MgO solid solution, Ni-Ca10Mg demonstrated stable CO2 conversion and syngas yield during the isothermal CaLDRM cycles, while the coke depositions are only 0.0395 gcoke/gmaterial after 10 CaLDRM cycles, corresponding to 37.2 % of unmodified material.
科研通智能强力驱动
Strongly Powered by AbleSci AI