Patent ID: 9259728
Filing Date: 2016-02-16
CPC Classification: B01J,C01B,C10G,Y02P

Claim Text:
1. A catalyst having metal catalyst nanoparticles supported on a cellulose catalyst support prepared from natural cellulose fibers, comprising: a cellulose catalyst; and the metal catalyst nanoparticles deposited directly onto the surface of the cellulose catalyst support by chemical vapor deposition or impregnation, wherein the cellulose catalyst support is treated by: (1) irradiating an electron beam of 10 to 500 kGy to the natural cellulose fibers, (2) the natural cellulose fibers treated with the electron beam are cut to a length of 1˜2 mm in a state of being impregnated in liquid nitrogen and are then heated from 500 to 1500° C. at a rate of 5 to 20° C./min under in an atmosphere composed of a 1:1 mixture of hydrogen and nitrogen, the temperature being maintained at 500 to 1500° C. for 0.5 to 2 hours to carbonize the natural cellulose fibers, (3) the heat-treated natural cellulose fibers are immersed in 0.1˜0.5 M aqueous sulfuric acid solution and then subjected to sweeping in 10˜60 cycles at −0.15˜1.3 V at a sweep rate of 50 mV/s, (4) the swept natural cellulose fibers are then immersed in a 30% nitric acid solution and chemically treated at 100˜150° C. and through a series of electron beam treatment, heat treatment, and chemical treatment, the cellulose catalyst support has pores with an inner channel size of up to 10 μm and a BET surface area of 230-383 m