镍
沸石
催化作用
二氧化碳重整
硅酸盐
甲烷
材料科学
金属
化学工程
无机化学
多孔性
合成气
化学
冶金
有机化学
复合材料
工程类
作者
Sungjoon Kweon,Young Woo Kim,Chae‐Ho Shin,Min Bum Park,Hyung‐Ki Min
标识
DOI:10.1016/j.cej.2021.133364
摘要
The preparation of porous nickel silicates has received considerable attention because of its potential as a catalyst for various applications, such as dry reforming of methane (DRM), CO2 hydrogenation, and water–gas shift. In this study, we first synthesize the nickel silicate *BEA-type zeolite (Ni-BEA) via the interzeolite transformation of nickel silicate MWW within 12 h. The presence of Ni in the tetrahedral framework of the *BEA structure is experimentally demonstrated using diverse analytical methods. The extraction of framework Ni at high temperatures generates uniform metallic Ni clusters within the pores of the *BEA structure. Ni-BEA exhibits the highest conversions of CH4 and CO2 and stability for DRM among the employed catalysts owing to the significant quantity of highly dispersed Ni clusters in the three-dimensional large-pore system. The synthesis of metallosilicate *BEA by interzeolite transformation and in-situ generation of uniform metal clusters can be expanded to the other metal-zeolite catalysts.
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