Scalable Preparation of Bimetallic Cu/Ni-Based Oxygen Carriers for Chemical Looping

Abstract

Chemical looping is a promising combustion technology utilizing the cyclic oxidation and reduction of a metal oxide to transport oxygen for a variety of applications related to carbon capture and storage (CCS). The scalable manufacture of a suitable oxygen carrier is a pivotal aspect of this research field. This work surveys the experimental preparation of CuO and CuO/NiO on SiC and SiO2 substrates for chemical looping with oxygen uncoupling (CLOU) applications. A novel impregnation method that enhances the metal–support interaction to increase dispersion and reduce CuO sintering has been developed in this work. Particles prepared using this method, termed “selective adsorption wet coimpregnation”, exhibited agglomeration resistance and high reactivity over many regeneration cycles. CuO/NiO@SiO2 oxygen carrier (33 wt % CuO, 1 mol of Ni/99 mol of Cu) showed no signs of agglomeration up to 975 °C in fluidized bed testing, cycling between CuO and Cu2O. Thermogravimetric analysis showed no loss in oxygen transport capacity or decrease in kinetics over 100 cycles.

Effect of Ni, La, and Ce Oxides on a Cu/Al2O3 Catalyst with Low Copper Loading for Ethanol Non‐oxidative Dehydrogenation

“…The presence of carbon in the samples was not observed. According to the literature 65, the loss of carbon is found at temperatures in the range of 400–600 °C. No weight loss of the sample was observed on our samples in this range.…”

A Review on Recent Progress in the Integrated Green Hydrogen Production Processes

“…To overcome these drawbacks, bimetallic oxygen carriers such as Ni-Fe, Fe-Co, Cu-Ni, Fe-Ca, Fe-Cu, Co-Ni, etc. [34,[50][51][52][53] as well as oxide perovskite materials with a general formula of ABO 3 (such as LaNiO 3 , CaMn 0.375 Ti 0.5 Fe 0.125 O 3−δ , etc.) [54,55].…”