Hydrogen production by steam reforming of methanol by Cu–Zn/CeAlO₃ perovskite

Abstract

In steam reforming of methanol (SRM), the efficacy of CeAlO3 perovskite as support for a bimetal catalyst was investigated. The CeAlO3 perovskite was synthesized employing a mesoporous silica (MCF) hard...

Renewable Hydrogen Production with Steam Reforming of Ethanol Using Siliceous Mesocellular Foam‐Supported Nickel Catalysts

“…The only difference in the synthesis method was that the former included ammonium fluoride as part of the dissolution process; at least this differentiating factor resulted in a smaller surface area and a larger pore size (18.23 nm vs 17 nm). The results by Ranjekar et al [ 17 ] have nonetheless revealed a very strong 97.4% ethanol conversion and 82.1% H 2 selectivity at 400 °C due to the presence of smaller active metal particles (7.3 nm) embedded within the porous network. Widyaningrum et al [ 45,47 ] studied Ni/MCF‐S catalysts to generate H 2 from pyrolysis of cellulose, finding that the H 2 selectivity was much higher as compared to using SBA‐15 of Al 2 O 3 supports, as the calculated Brunauer–Emmett–Teller (BET) surface area of 825 m 2 g −1 and pore diameter of 17 nm were higher.…”

“…These trends are generally in agreement with the findings of other researchers in the literature. [ 5,17 ] Furthermore, the CO generated could be subjected to the water–gas shift reaction (WGS), as shown in Equation () to generate even more H 2 . [ 16 ] Given the high‐temperature requirement to activate the reaction and the formation of carbonaceous products via C–C scission (such as via ethanol decomposition), these processes can expectedly favor sintering (i.e., metal particle compaction) and coke (i.e., solid carbon) formation to deactivate the Ni catalyst.…”

“…[ 29,32 ] Several silica support structures have been studied for Ni‐based ESR reactions [ 5,33–36 ] ; siliceous mesocellular foam (MCF‐S), like other popular silica support materials SBA‐15 [ 5,37–39 ] and MCM‐41, [ 40–42 ] has a mesoporous structure comprising large, uniformly sized spherical pores (>10 nm), which can disperse the Ni nanoparticles around and within the porous network. [ 43–46 ] Ranjekar et al [ 17 ] considered a Cu – Co – Ce/MCF – S catalyst to study the ESR reaction, which, to the best of our knowledge, remains the only example in the literature of MCF‐S being applied to this reaction. Their MCF surface area (634 m 2 g −1 ) compared to that calculated by Widyaningrum et al (825 m 2 g −1 ) [ 45 ] was much lower.…”

CuO‐modified LaNi0.4Al0.6O3−δ with improvement performance in MSR at low temperature

“…As an active oxide, perovskite has characteristics that inert oxides (such as Al 2 O 3 ) do not have. Therefore, perovskite has unique advantages and potential as a metal oxide support 11 . Although supports do not directly show catalytic activity, they can affect the catalytic activity of copper catalysts supported on them 12 .…”

Rice Husk Ash-Derived Ca-Mg-Modified Silicate as Support for Ni-Co for Hydrogen Production by Sorption-Enhanced Steam Reforming of Bioethanol

“… Due to varied reaction parameters and the composition of the catalysts involved, several reaction mechanisms have been hypothesized. We proposed in our prior work that the process starts with ethanol dehydrogenation to produce acetaldehyde, which is eventually converted to CH 4 and CO 2 .…”