Process for preparing nickel based catalysts for SCR of natural gas

摘要

The present invention relates to a method for preparing a nickel-based catalyst for steam carbon dioxide reforming (SCR) of natural gas using steam and carbon dioxide, more particularly to a method for preparing a nickel-based catalyst represented by Ni/η-Al2O3, which is prepared by supporting nickel on a spherical η-alumina support having many acid sites at high density by repeating impregnation and drying tens of times.;The catalyst prepared according to the present invention exhibits superior catalytic activity when used in steam carbon dioxide reforming reaction (SCR) even under harsh conditions of high temperature and high pressure and hardly exhibits carbon deposition due to superior durability.

主权项

1. A method for preparing a nickel-based catalyst for steam carbon dioxide reforming (SCR), comprising:
preparing an alumina sol by adding an organic binder and a dispersing agent to an aluminum precursor solution and stirring at 50-90° C. at pH 3-6 and then converting the alumina sol to an alumina gel by heating at 50-90° C.; preparing an η-alumina support by drying the alumina gel at 150-230° C., shaping into a spherical shape and sintering under nitrogen flow; and preparing a nickel-based catalyst represented by Ni/η-alumina by supporting nickel on the η-alumina support by repeating a procedure of impregnating the η-alumina support in a nickel precursor solution and drying at 50-100° C. 10-20 times and then sintering under air flow.