Skeletal Nickel Catalyst for the Methanation Reaction Developed by Laser-Engineered Net-Shaping Technology

Kuo Yan,Zaiwen Lin,Meng Chen,Yuren Wang,Xu Li,Xiaolong Wang,Heng Jiang,Jun Wang

doi:10.3390/catal12020208

Abstract

Here, we report a skeletal nickel catalyst prepared by cumulative processing. The Ni, Al, and CoCrMo multi-component alloys were printed by a dual-powder laser-engineered net-shaping system, and alloy samples with different components were obtained through high-throughput design. After leaching in 5 mol/L NaOH at 40 °C for 2 h, the specific surface area of the catalyst increased with increasing Al content. Increasing the leaching temperature and prolonging the leaching time also effectively increased the specific surface area of the catalyst. After leaching at 80 °C for 12 h, the specific surface area was 42.36 m2/g. After cleaning and hydrogen-reduction treatment at 400 °C, the catalyst showed high catalytic activity. The highest conversion rate of CO reached 89.56%, and the selectivity of CH4 remained above 98% for a long time.

Highlights

Environmental issues are currently among the main challenges faced by mankind, and clean energy is receiving widespread attention
We investigated the effect of different Ni/Al powder ratios and different NaOH leaching conditions on the catalyst specific surface area to better understand the characteristics of 3D-printed skeletal nickel catalysts
We investigated the possibility of using laser-engineered net-shaping (LENS) technology to prepare reached 89.54%

Summary

Introduction

Environmental issues are currently among the main challenges faced by mankind, and clean energy is receiving widespread attention. The skeletal nickel-based catalyst developed by Raney [5,6] has a wide range of applications in the field of SNG. It is low-cost and simple to prepare, and it shows a good catalytic effect. Catalyst material coatings are deposited on metal or ceramic support structures by relatively novel coating techniques, such as thermal spraying and plasma spraying [14,15] These methods are limited and can only grow on substrates with simple geometries, which are not applicable to reactors with complex structures.

Experimental Section

Results and Discussion

With at increasing

Conclusions