Method for preparing nano metal catalyst

• Main Authors: SHI LEI, WANG YUXIN
• Format: Patent
• Language: English
• Published: 30.09.2015
• Subjects: ACYCLIC OR CARBOCYCLIC COMPOUNDS; CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOIDCHEMISTRY; CHEMISTRY; CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION ORPROCESSING OF GOODS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; METALLURGY; ORGANIC CHEMISTRY; PERFORMING OPERATIONS; PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS; TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINSTCLIMATE CHANGE; THEIR RELEVANT APPARATUS; TRANSPORTING

The invention discloses a method for preparing a nano metal catalyst, and relates to a catalyst preparation method. The method fully utilizes the elements such as silicon, carbon and trace metals contained in rice husks, uses SiO2 generated after calcinating a silicon source in the rick husks as a carrier of the catalyst, and uses organic matters and a carbon source as a reducing agent during the calcination of the catalyst. Under the condition of low temperature calcination, metal oxides can be reduced to a metal Cu simple substance through the reducing agent without additional reducing processes, so that energy is reduced; the trace element K contained in the rice husks is used as an auxiliary of the catalyst, so that the activity of the catalyst is remarkably improved; when being used in the low temperature methanol synthesis reaction, the catalyst shows good reaction activity and selectivity of methanol. According to the invention, the nano metal catalyst is a reduced state metal Cu-based catalyst, and no additional reducing process is required; the prepared catalyst shows relatively high Cu metal dispersion degree and relatively small metal Cu particles.