Search Results - "Hermann Gies"
-
1
Cu-exchanged Al-rich SSZ-13 zeolite from organotemplate-free synthesis as NH3-SCR catalyst: Effects of Na+ ions on the activity and hydrothermal stability
Published in Applied catalysis. B, Environmental (15-11-2017)“…[Display omitted] •Al-rich Cu-SSZ-13 zeolite from organotemplate-free synthesis is a superior NH3-SCR catalyst.•Na+ ions can enhance hydrothermal stability of…”
Get full text
Journal Article -
2
The crystal structure of synthetic kenyaite, Na2Si20O40(OH)2·8H2O
Published in Journal of solid state chemistry (01-08-2021)“…A synthetic kenyaite sample possessing the chemical composition Na16[Si160O320(OH)16]·64H2O per unit cell was structurally analysed using X-ray powder data…”
Get full text
Journal Article -
3
Understanding the effect of spatially separated Cu and acid sites in zeolite catalysts on oxidation of methane
Published in Nature communications (28-03-2024)“…Unraveling the effect of spatially separated bifunctional sites on catalytic reactions is significant yet challenging. In this report, we investigate the role…”
Get full text
Journal Article -
4
Effects of Al distribution in the Cu-exchanged AEI zeolites on the reaction performance of continuous direct conversion of methane to methanol
Published in Applied catalysis. B, Environmental (15-05-2023)“…The effects of the organic structure-directing agent (OSDA) with or without Na cations for the synthesis of AEI zeolite on the location and content of the Al…”
Get full text
Journal Article -
5
The structure of RUB-56, (C6H16N)8 [Si32O64(OH)8]·32 H2O, a hydrous layer silicate (2D-zeolite) that contains microporous levyne-type silicate layers
Published in Zeitschrift für Kristallographie. New crystal structures (01-06-2024)“…Si , monoclinic, 2/ (no. 12), = 16.2532(14) Å, = 13.3020(7) Å, = 16.7771(14) Å, = 96.476(10)°, = 3604.07(3) Å , = 1, ) = 0.031, = 2.44, ) = , ) = ,…”
Get full text
Journal Article -
6
Dual Templating for AFX/LEV Intergrowth Zeolite
Published in Chemistry letters (05-02-2022)“…Zeolite composed of an intergrowth structure based on AFX and LEV framework types was successfully synthesized by dual-templating strategy using…”
Get full text
Journal Article -
7
Synthesis of novel aluminoborosilicate isomorphous to zeolite TUN and its acidic and catalytic properties
Published in Microporous and mesoporous materials (01-08-2021)“…The novel TUN-type aluminoborosilicate zeolite (denoted as [Al, B]-TUN), which consists of a three-dimensional pore system with 10-ring, has been…”
Get full text
Journal Article -
8
The structure of RUB-1, (C8H16N)6[B6Si48O108], a boron containing levyne-type zeolite, occluding N-methyl-quinuclidinium in the cage-like pores
Published in Zeitschrift für Kristallographie. New crystal structures (26-10-2023)“…Si , trigonal, (no. 166), = 12.8892(1) Å, = 22.3058(2) Å, = 3209.23(4) Å , = 1, density = 2.02(2) g·cm , ) = 0.038, Chi = 2.86, T = 293 K…”
Get full text
Journal Article -
9
Cu-Exchanged CHA-Type Zeolite from Organic Template-Free Synthesis: An Effective Catalyst for NH3‑SCR
Published in Industrial & engineering chemistry research (22-04-2020)“…A Cu-containing CHA-type zeolite was prepared via aqueous ion exchange of the CHA zeolite from organic template-free synthesis. The thus-obtained template-free…”
Get full text
Journal Article -
10
Bimetallic Zn and Hf on Silica Catalysts for the Conversion of Ethanol to 1,3-Butadiene
Published in ACS catalysis (05-06-2015)“…Silica-supported catalysts for the conversion of ethanol to 1,3-butadiene were investigated. The combination of Hf(IV) and Zn(II) resulted in a stable,…”
Get full text
Journal Article -
11
Catalytic applications of OSDA-free Beta zeolite
Published in Journal of catalysis (01-12-2013)“…Beta zeolite from OSDA-free synthesis was investigated as catalyst in different types of reactions. In some reactions, its performance could be increased via…”
Get full text
Journal Article -
12
CHA-Type Zeolite Prepared by Interzeolite Conversion Method Using FAU and LTL-Type Zeolite: Effect of the Raw Materials on the Crystallization Mechanism, and Physicochemical and Catalytic Properties
Published in Catalysts (01-10-2020)“…The effect of the raw materials including parent zeolite as aluminosilicate sources and organic structure-directing agents (OSDAs) on the crystallization…”
Get full text
Journal Article -
13
Interlayer Expansion of the Layered Zeolite Precursor RUB-39: A Universal Method To Synthesize Functionalized Microporous Silicates
Published in Chemistry of materials (24-05-2011)“…Interlayer expansion reaction leads to a new family of microporous framework silicates using hydrous layer silicates as precursors. Using silylating agents…”
Get full text
Journal Article -
14
Protein Encapsulation in Mesoporous Silicate: The Effects of Confinement on Protein Stability, Hydration, and Volumetric Properties
Published in Journal of the American Chemical Society (06-10-2004)“…On the basis of the predictions of statistical−thermodynamic models, it is postulated that excluded volume effects may play a significant role in the…”
Get full text
Journal Article -
15
Methanol‐to‐Olefins Reaction over Large‐Pore Zeolites: Impact of Pore Structure on Catalytic Performance
Published in Chemie ingenieur technik (01-06-2021)“…In the methanol‐to‐olefins (MTO) reaction, product flexibility is important for meeting the fluctuating chemicals demands. In this paper, the catalytic…”
Get full text
Journal Article -
16
New zeolite-like RUB-5 and its related hydrous layer silicate RUB-6 structurally characterized by electron microscopy
Published in IUCrJ (01-05-2020)“…This study made use of a recently developed combination of advanced methods to reveal the atomic structure of a disordered nanocrystalline zeolite using exit…”
Get full text
Journal Article -
17
Interlayer Expansion of the Hydrous Layer Silicate RUB-36 to a Functionalized, Microporous Framework Silicate: Crystal Structure Analysis and Physical and Chemical Characterization
Published in Chemistry of materials (24-04-2012)“…The hydrous layer silicate RUB-36, (C6H16N)4 [H4Si36O76], has been used for an interlayer expansion reaction with dichlorodimethylsilane to interconnect…”
Get full text
Journal Article -
18
Crystal Structure of MCM-22 (MWW) and Its Delaminated Zeolite ITQ-2 from High-Resolution Powder X-Ray Diffraction Data: An Analysis Using Rietveld Technique and Atomic Pair Distribution Function
Published in Chemistry of materials (22-09-2009)“…The three-dimensional structure of crystalline, calcined pure siliceous MCM-22 (which has a chemical formula of Si72O144) and its delaminated derivative, ITQ-2…”
Get full text
Journal Article -
19
Adsorption of amino acids on the magnetite-(111)-surface: a force field study
Published in Journal of molecular modeling (01-02-2013)“…Magnetite (Fe 3 O 4 ) is an important biomineral, e.g., used by magnetotactic bacteria. The connection between the inorganic magnetite-(111)-surface and the…”
Get full text
Journal Article -
20
Synthesis and Structure of COE-11, a New Borosilicate Zeolite with a Two-Dimensional Pore System of 12-Ring Channels
Published in Chemistry an international journal (01-03-2023)“…The new zeolite, COE-11, was synthesized at 155 °C to 168 °C by hydrothermal synthesis from a reaction mixture of SiO2/tetraethylammonium…”
Get full text
Journal Article