基于3D打印技术的甲烷水蒸气重整研究

doi:10.11896/cldb.23020015

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Abstract Natural gas(the main composition of natural gas is methane) reforming is one of the most efficient and cleanest utilization of natural gas. The obtained reformed gas, mainly consisting of H₂, can be supplied as fuels to solid oxide fuel cells for efficiently power generating. Reactor loaded with catalysts is necessary for methane steam reforming. The 3D-printed porous structure exhibits outstanding stability at elevated tempe-rature and excellent resistance to the highly oxidizing condition, which can obviously improve the stability of the methane reforming reactor. In this work, Ni-CeO₂/γ-Al₂O₃ catalysts were loaded onto the 3D-printed porous structure and metallic foams via impregnation. The catalyst morphology, element distribution, phase structure and thermal stability were obtained through characterization methods such as SEM, XRD and TG. Accordingly, the effects of temperature, slurry ratio and the reactor structure on methane steam reforming were studied. Resultantly, an optimized catalyst recipe was obtained as 3.5wt% PVA, 19wt% Ni, 16wt% CeO₂ and 2.5wt% γ-Al₂O₃. The reforming tests showed that without catalysts, the hydrogen concentration of 3D-printed Inconel625 porous reactor and Ni foam was as low as 13vol% at a temperature below 700 ℃;while above 800 ℃, the 3D-printed Inconel625 porous reactor and Fe foam presented similar reforming performance, but the 3D-printed reactor showed a better repeatability. Moreover, with catalyst loading, the NCA-I (3D-printed Inconel625 porous reactor) samples always showed a lowered reforming performance than NCA-N (Ni foam) and NCA-F (Fe foam), which is mainly due to the existence of Cr that brings Cr₂O₃ film to the exposed surface during the reforming process and thus hinders the contact between the reaction gas and the active surface. However, the NCA-I samples showed excellent stability that no obvious embrittlement and fracture were observed after reforming test, which shows the potential to effectively improve the stability of reforming reactors.

Key words： steam reforming of methane reator catalyst Ni-CeO₂/γ-Al₂O₃ 3D printing

Published: 25 May 2024 Online: 2024-05-28

CLC number:

TK91

Fund:National Key R & D Program of China (2022YFB4003603), the Guangdong Academy of Sciences Project to Build a First-class Scientific Research Institution in China(2019GDASYL-0102007), and Guangdong Academy of Sciences International Science and Technology Coo-peration Platform Construction in China(2022GDASZH-2022010203-003).

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	LI Cong
	YU Ran
	LIU Taikai
	DENG Chunming
	DENG Changguang
	LIU Min

Cite this article:

LI Cong,YU Ran,LIU Taikai, et al. Study of Methane Steam Reforming Based on 3D-Printing Technology[J]. Materials Reports, 2024, 38(10): 23020015-9.

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http://www.mater-rep.com/EN/10.11896/cldb.23020015 OR http://www.mater-rep.com/EN/Y2024/V38/I10/23020015

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