Hydrogen in methanol catalysts by neutron imaging

Terreni, Jasmin; Billeter, Emanuel; Sambalova, Olga; Liu, Xiaochun; Trottmann, Matthias; Sterzi, Andrea; Geerlings, Hans; Trtik, Pavel; Kaestner, Anders; Borgschulte, Andreas

doi:10.1039/d0cp03414b

Cited by 12 publications

(18 citation statements)

References 77 publications

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“…As sketched in Fig. 1, CO formation proceeds via two steps (adsorption and dissociation) [1,10], while several more are needed to produce methanol and subsequently dimethyl ether. Thermodynamically, the reversed gas-water shift reaction yielding CO is endothermic and becomes exothermic with simultaneous water sorption.…”

Section: Resultsmentioning

confidence: 99%

“…The same measurement procedures were performed on macroscopic 1:1 mixtures of a commercial Cu/ZnO/Al 2 O 3 catalyst with zeolite 5 Åand zeolite 3 Å, respectively, under identical experimental conditions. The characterisation of the commercial catalyst used (Alfa Aesar, Germany) was published in [1]; the zeolites pellets of mm size were purchased from Sigma Aldrich. For discussion, we show only the space-time yields of the steady-state and at maximum rates including sorption enhancement (Fig.…”

Section: Catalysismentioning

confidence: 99%

“…Methanol as a renewable fuel can be produced by reduction of CO 2 with hydrogen over Cu/ZnO/Al 2 O 3 catalysts [1][2][3]. The high thermodynamic stability of CO 2 results in a relatively low driving force of the reaction [4].…”

Section: Introductionmentioning

confidence: 99%

“…However, the high pressure needed impedes the analysis of the reaction mechanism by operando DRIFTS. This is not a general challenge, but for the methanol case the signal from high gas density of reactants ( CO 2 ) and products (CO) drown out the weak signal from the catalyst surface [1]. Recently, the general applicability of inelastic neutron scattering (INS) as a postmortem analysis method revealing insights into the reaction mechanism of methanol synthesis has been demonstrated by Kandemir et al [16].…”

Section: Introductionmentioning

confidence: 99%

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Neutron Insights into Sorption Enhanced Methanol Catalysis

et al. 2021

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Sorption enhanced methanol production makes use of the equilibrium shift of the $$\hbox {CO}_2$$ CO 2 hydrogenation reaction towards the desired products. However, the increased complexity of the catalyst system leads to additional reactions and thus side products such as dimethyl ether, and complicates the analysis of the reaction mechanism. On the other hand, the unusually high concentration of intermediates and products in the sorbent facilitates the use of inelastic neutron scattering (INS) spectroscopy. Despite being a post-mortem method, the INS data revealed the change of the reaction path during sorption catalysis. Concretely, the experiments indicate that the varying water partial pressure due to the adsorption saturation of the zeolite sorbent influences the progress of the reaction steps in which water is involved. Experiments with model catalysts support the INS findings.

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Section: Resultsmentioning

confidence: 99%

Section: Catalysismentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Neutron Insights into Sorption Enhanced Methanol Catalysis

et al. 2021

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“…Crucially for catalysis, neutron imaging can be carried out at real temperatures [160][161][162]. The Sabatier reaction, Equation (10), typically runs at 250 • C and above and is catalysed by nickel.…”

Section: Neutron Imagingmentioning

confidence: 99%

Net Zero and Catalysis: How Neutrons Can Help

Parker

Lennon

2021

Physchem

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Net Zero has the aim of achieving equality between the amount of greenhouse gas emissions produced and the amount removed from the atmosphere. There is widespread acceptance that for Net Zero to be achievable, chemistry, and hence catalysis, must play a major role. Most current studies of catalysts and catalysis employ a combination of physical methods, imaging techniques and spectroscopy to provide insight into the catalyst structure and function. One of the methods used is neutron scattering and this is the focus of this Perspective. Here, we show how neutron methods are being used to study reactions and processes that are directly relevant to achieving Net Zero, such as methane reforming, Fischer–Tropsch synthesis, ammonia and methanol production and utilization, bio-mass upgrading, fuel cells and CO2 capture and exploitation. We conclude by describing some other areas that offer opportunities.

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