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Now showing items 1-25 of 25
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2020)
On our route towards a more sustainable future, the use of stranded and underutilized natural gas to produce chemicals would be a great aid in mitigating climate change, due to the reduced CO2 emissions in comparison to ...
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2020)
In catalysts for CO2 hydrogenation, the interface between metal nanoparticles (NPs) and the support material is of high importance for the activity and reaction selectivity. In Pt NP-containing UiO Zr-metal–organic frameworks ...
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2020)
A challenge in converting CO2 into hydrocarbons (HC) via methanol (MeOH) is the gap between the optimal temperature for each step (i.e. ≤250 °C for MeOH and ≥350 °C for HC). The focus of this study is to elucidate the cause ...
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2020)
Metal–organic frameworks (MOFs) show great prospect as catalysts and catalyst support materials. Yet, studies that address their dynamic, kinetic, and mechanistic role in target reactions are scarce. In this study, an ...
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2020)
Herein, we report the discovery of a toroidal inorganic cluster of zirconium(IV) oxysulfate of unprecedented size with the formula Zr70(SO4)58(O/OH)146⋅x(H2O) (Zr70), which displays different packing of ring units and thus ...
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2020)
Reactions between alkenes and methanol or dimethyl ether (DME) on zeolite catalysts are involved in industrial processes that are highly relevant for the transition to renewable carbon sources, such as the Methanol-To-Hydrocarbons ...
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2020)
The direct conversion of methane to methanol has the potential of substantially reducing methane emissions and flaring, as such a process might provide an alternative for remote natural gas locations. In this report, we ...
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2019)
Bimetallic nanocatalysts are key enablers of current chemical technologies, including car exhaust converters and fuel cells, and play a crucial role in industry to promote a wide range of chemical reactions. However, owing ...
(Journal article / Tidsskriftartikkel / AcceptedVersion; Peer reviewed, 2019)
Functionalization of metal-organic frameworks (MOFs) with noble metals is a promising way for producing new versatile catalysts that will combine the outstanding porosity and specific surface area of MOFs with high catalytic ...
(Journal article / Tidsskriftartikkel / AcceptedVersion; Peer reviewed, 2019)
The successful synthesis of metal−organic framework (MOF) compounds relies on an intricate interplay between the components of the synthesis liquor at the given synthesis conditions. Herein, we explore the interdependence ...
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2019)
This contribution clarifies the overoxidation-preventing key step in the methane-to-methanol (MTM) conversion over copper mordenite zeolites. We followed the methane-to-methanol conversion over copper mordenite zeolites ...
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2018)
A one pot catalytic system which involves Cu and an alkoxide co-catalyst has been used for methanol (MeOH) synthesis at low temperature. Up to about 92% syngas conversion per pass and more than 90% selectivity to MeOH (the ...
(Journal article / Tidsskriftartikkel / AcceptedVersion; Peer reviewed, 2018)
Two series of Zn-ZSM-5 catalysts were prepared by ion exchanging two commercial zeolites with different Si/Al ratios (40 and 15) with increasing Zn loadings. The nature of the Zn sites in the zeolite was studied by ...
(Journal article / Tidsskriftartikkel / AcceptedVersion; Peer reviewed, 2018)
The deactivation of zeolite catalyst H-ZSM-5 by coking during the conversion of methanol to hydrocarbons was monitored by high-energy space- and time-resolved operando X-ray diffraction (XRD) . Space resolution was achieved ...
(Journal article / Tidsskriftartikkel / SubmittedVersion, 2018)
In the present study, a series of H-ZSM-22 mesoporous catalysts resulting from three different desilication treatments (NaOH treatment, treatment using mixtures of NaOH/CTAB and using mixtures of NaOH/TBAOH) and sequential ...
(Journal article / Tidsskriftartikkel / SubmittedVersion, 2018)
We review the structural chemistry and reactivity of copper-exchanged molecular sieves with chabazite (CHA) topology, as an industrially applied catalyst in ammonia mediated reduction of harmful nitrogen oxides (NH3-SCR) ...
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2018)
Cu nanoparticles are known to be very active for methanol (MeOH) synthesis at relatively low temperatures, such that smaller particle sizes yield better MeOH productivity. We aimed to control Cu nanoparticle (NP) size and ...
(Journal article / Tidsskriftartikkel / SubmittedVersion, 2017)
A variety of synthetic procedures have been used to obtain zeolite ZSM-23 (MTT) catalysts with crystallite sizes ranging from the micrometer to nanometer scale. When the acidic zeolite is used as catalyst for the Methanol ...
(Journal article / Tidsskriftartikkel / AcceptedVersion; Peer reviewed, 2017)
The synthesis, characterization and catalytic performance of offretite with four distinct crystal morphologies (oval, hexagonal, broccoli-like, and spherical) are presented. As a member of the ABC-6 family of zeolite ...
(Journal article / Tidsskriftartikkel / AcceptedVersion; Peer reviewed, 2017)
Cu-exchanged zeolites possess active sites that are able to cleave the C–H bond of methane at temperatures ≤200 °C, enabling its selective partial oxidation to methanol. Herein we explore this process over Cu-SSZ-13 ...
(Journal article / Tidsskriftartikkel / AcceptedVersion; Peer reviewed, 2017)
ZSM-5 is a widely used zeolite catalyst and is employed industrially for the methanol to gasoline (MTG) process. Even so, deactivation of ZSM-5 by coke formation constitutes a major technical and also fundamental challenge. ...
(Journal article / Tidsskriftartikkel / AcceptedVersion; Peer reviewed, 2017)
Catalyst deactivation during the methanol-to-hydrocarbons (MTH) reaction was investigated using five different commercially prepared microporous catalysts, including Mordenite, ZSM-22, ZSM-5, zeolite Beta and SAPO-34. The ...
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2017)
Methanol syntheses at low temperature in a liquid medium present an opportunity for full syngas conversion per pass. The aim of this work was to study the role of solvents polarity on low-temperature methanol synthesis ...
(Journal article / Tidsskriftartikkel / AcceptedVersion; Peer reviewed, 2015)
Zeolites are crystalline aluminosilicates that are widely used as shape-selective catalysts in the refinery and petrochemical industries. By synthesizing a series of structurally related zeolite catalyst and applying them ...
(Journal article / Tidsskriftartikkel / AcceptedVersion; Peer reviewed, 2008)
Zeolites with the CHA topology have been synthesized with Si/Al ratios ranging from 15 to 133. ICP-AES analysis shows that the Si/Al ratio in the material is close to linearly related to the Si/Al ratio in the reaction ...