Ethanol Steam Reforming for Hydrogen Production Over Hierarchical Macroporous Mesoporous SBA-15 Supported Nickel Nanoparticles

Abstract

The influence of complementary macropores, present in hierarchical macroporous mesoporous SBA-15, on the performance of supported Ni nanoparticles for ethanol steam reforming has been investigated. The increased open nature of the architecture, afforded through the incorporation of the secondary macropore network, enables superior metal dispersion. This, in turn, enhances catalytic hydrogen production performance through the generation of a greater density of active sites.

Recent Status in Catalyst Modification Strategies for Hydrogen Production from Ethanol Steam Reforming

“…The obtained NiOMC catalyst could completely convert ethanol at temperature higher than 350 °C and the maximum H 2 production was achieved at 5.3 mol/mol ethanol at 500 °C. Additionally, compared with the porous carbon materials, the use of framework material equipped with uniform connected mesoporous property and well‐defined periodic structures rendering the remarkable superiority in thermal stability and reactant mobility [181–185] . Just like the MCM‐41 and SBA‐15 supported Ni‐based catalysts provided higher hydrogen production and less carbon deposition compared with Ni was loaded on the nonporous material (MMT and Al 2 O 3 ) during chemical looping steam reforming of ethanol [186–188] .…”

“…Additionally, compared with the porous carbon materials, the use of framework material equipped with uniform connected mesoporous property and well-defined periodic structures rendering the remarkable superiority in thermal stability and reactant mobility. [181][182][183][184][185] Just like the MCM-41 and SBA-15 supported Ni-based catalysts provided higher hydrogen production and less carbon deposition compared with Ni was loaded on the nonporous material (MMT and Al 2 O 3 ) during chemical looping steam reforming of ethanol. [186][187][188] Wang et al [189] adopted sol-gel and incipient wetness impregnation (SIWI) technology to prepare the Ni-hierarchical beta zeolite catalyst, and such sample exhibited 100 % EtOH conversion and 76 % H 2 yield scarcely any drop in 32 h at 550 °C.…”

A mini review on recent progress of steam reforming of ethanol

“…Parlett et al prepared a multi-level porous SBA-15 carrier with both macropores and mesopores, and then loaded Ni nanoparticles. 80 The extremely high specific surface area and a large number of pores ensure a high dispersion of Ni. When the loading amount of Ni reaches 10 wt%, it can still maintain an ultra-fine particle size of ∼3 nm, providing many active sites, which result in high activity.…”

Hydrogen Production by Ethanol Reforming on Supported Ni–Cu Catalysts

“…In general, transition metals such as Ni, Co, Pt, Pd, and Rh are often used to catalyze the production of hydrogen from ethanol due to their good activity and selectivity. − Ni is widely used as a catalyst thanks to its high activity in C–C bond cleavage, however, its use is limited by various disadvantages. − The reactivity of Cu is limited for hydrogen production from ethanol but good for dehydrogenation − and the WGS reaction. In addition, mixing in Ni and Cu can reduce CO production and improve coking resistance for hydrogen production in ethanol using silica (SiO 2 ) as a carrier.…”