Double-shell hollow copper-zinc-based catalyst for preparing methanol from CO2 at low temperature and preparation method thereof

• Main Authors: LI JIE, XIA YUDONG, XU YANGZHOU, HAN HAN, LI XIAOJUN
• Format: Patent
• Language: Chinese; English
• Published: 10.06.2022
• Subjects: ACYCLIC OR CARBOCYCLIC COMPOUNDS; CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOIDCHEMISTRY; CHEMISTRY; METALLURGY; ORGANIC CHEMISTRY; PERFORMING OPERATIONS; PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL; THEIR RELEVANT APPARATUS; TRANSPORTING

The invention discloses a double-shell hollow copper-zinc-based catalyst for preparing methanol from CO2 at low temperature and a preparation method of the double-shell hollow copper-zinc-based catalyst. The method comprises the following steps: carrying out solvothermal reaction on a mixed solution of copper nitrate, zinc nitrate, an auxiliary agent and glutamic acid, and calcining to obtain the double-shell hollow Cu/ZnO-Ba (Ca) catalyst. The catalyst provided by the invention has more effective active sites, and enough gaps and gaps exist among metal particles, so that methanol is promoted to circulate in a shell, and a low-temperature methanol path is favorably realized. Meanwhile, the alkali or alkaline earth metal auxiliary agent can increase the specific surface area and alkaline sites of the catalyst, promote dispersion of Cu particles and enhance the synergistic effect of Cu-ZnO, CO2 can be adsorbed and activated at low temperature, and then the space time yield of methanol is increased. 本发明公开了一种用于CO