A Ni-Ba unsupported catalyst has been developed to be used as a dual function material (DFM) for a new CO₂ storage and in-situ regeneration (CO₂-SR technology), consisting in a CO₂ storage step followed by a CH₄ regeneration phase, working in alternating, cyclic and isothermal regime. The heterometallic mixed-oxide catalyst -NiO.BaO- used in this technology was prepared by an ultrasonic assisted coprecipitation using 1:1 atomic ratio (Ni:Ba) and colloidal silica as an agent promoting surface area and improving mechanical properties. The solid obtained maintains the fcc-structure at higher temperatures, demonstrates high reducibility as a bulky catalyst and presents a connected and balanced strong basic sites and CH₄ activation centres. It showed a CO₂-storage net capacity of 0.232 mmolCO₂ g⁻¹ and a CO₂ and CH₄ removal rate of 13.97 % and 11.04 % respectively, with a remarkable selectivity to hydrogen as an enriched-synthesis gas (H₂+CO) stream at 600 °C.

已开发出Ni-Ba无载体催化剂，可用作双重功能材料（DFM），用于新的CO ₂储存和原位再生（CO ₂ -SR技术），包括在CO ₂储存步骤后进行CH _4个再生阶段，处于交替，循环和等温状态。该技术中使用的杂金属混合氧化物催化剂-NiO.BaO-是通过超声辅助共沉淀法制备的，使用1：1原子比（Ni：Ba）和胶体二氧化硅作为促进表面积和改善机械性能的试剂。获得的固体保持FCC在较高温度下的结构，显示出作为大体积催化剂的高还原性，并呈现出相互连接且平衡的强碱性位点和CH ₄活化中心。其显示的CO ₂储存净容量为0.232 mmolCO ₂  g ^-1，CO ₂和CH _4的去除率分别为13.97％和11.04％，并且对作为富集合成气（H ₂ + CO ）在600°C下流。