An Efficient Chiral Porous Catalyst Support -Hypercrosslinked Amino Acid Polymer

2021 ◽  
Author(s):  
Yaodong Wang ◽  
Lijia Liu ◽  
Kexiao Sang ◽  
Yudan Wang ◽  
Chunhong Zhang ◽  
...  
Keyword(s):  
Amino Acid ◽  
Catalyst Support ◽  
Porous Catalyst

In Situ NMR Imaging Studies of the Drying Kinetics of Porous Catalyst Support Pellets

1998 ◽  
Vol 102 (17) ◽  
pp. 3090-3098 ◽  
Author(s):  
Igor V. Koptyug ◽  
Vladimir B. Fenelonov ◽  
Ludmila Yu. Khitrina ◽  
Renad Z. Sagdeev ◽  
Valentin N. Parmon
Keyword(s):  
Catalyst Support ◽  
Drying Kinetics ◽  
Nmr Imaging ◽  
Imaging Studies ◽  
Porous Catalyst ◽  
Kinetics Of ◽  
In Situ Nmr

scholarly journals NMR Investigation into the Influence of Surface Interactions on Liquid Diffusion in a Mesoporous Catalyst Support

2019 ◽  
Vol 63 (3-4) ◽  
pp. 319-327 ◽  
Author(s):  
Neil Robinson ◽  
Carmine D’Agostino
Keyword(s):  
Catalyst Support ◽  
Nmr Relaxation ◽  
Primary Alcohols ◽  
Mesoporous Catalyst ◽  
Porous Catalyst ◽  
Self Diffusion ◽  
Non Invasive ◽  
Diffusion Characteristics ◽  
Diffusion Dynamics ◽  
Nmr Diffusion

AbstractPulsed field gradient NMR diffusion measurements provide a non-invasive measure of the mass transport (self-diffusion) characteristics of liquids confined to porous catalyst materials. Here we explore the ability of this technique to probe the diffusive behaviour of a series of short-chain primary alcohols within a mesoporous catalyst support material; through the comparison of our results with highly surface-sensitive NMR relaxation data, we show that the evaluation of bulk-pore diffusion dynamics may provide a simple and indirect method to access and explore surface interaction phenomena occurring at the catalyst-liquid interface.

Graphene‐Like Hydrogen‐Bonded Melamine–Cyanuric Acid Supramolecular Nanosheets as Pseudo‐Porous Catalyst Support

2021 ◽  
pp. 2007368
Author(s):  
Jun‐Xi Wu ◽  
Partha Pratim Bag ◽  
Yan‐Tong Xu ◽  
Li Gong ◽  
Chun‐Ting He ◽  
...  
Keyword(s):  
Cyanuric Acid ◽  
Catalyst Support ◽  
Porous Catalyst ◽  
Hydrogen Bonded

Influence of Wood Flour Additive on Porous Structure and Strength Properties of Moulded Alumina

2015 ◽  
Vol 670 ◽  
pp. 139-143 ◽  
Author(s):  
Tatiana Bugrova ◽  
Anastasia Tatarkina ◽  
Ilya Zhukov ◽  
Grigory Mamontov
Keyword(s):  
Low Temperature ◽  
Porous Structure ◽  
Pore Volume ◽  
Wood Flour ◽  
Catalyst Support ◽  
Strength Properties ◽  
Porous Catalyst ◽  
Preparation Conditions ◽  
Granule Strength ◽  
20 Nm

The moulded Al2O3 materials prepared by mixing of thermochemically activated aluminum trihydroxide (TCA ATH) with wood flour were proposed to be used as promising porous catalyst support for various processes. A series of Al2O3 supports with different wood flour loading (0, 2 and 5 %wt.) were studied by SEM, low-temperature N2 sorption, XRD, granule strength and water-absorbing capacity. It was shown that supports were characterized by porous structure with mesopore sizes of 2-20 nm and specific surface area of 159-186 m2/g. The increase of the amount of wood flour leads to increase of the share of pore volume with wider than 10 nm and the decrease of the strength of alumina granules. Thus, optimization of preparation conditions allows obtaining alumina materials with desired porous structure.

Preparation of Porous Catalyst Support with Gangue of Bauxite Tailing

2011 ◽  
Vol 284-286 ◽  
pp. 1358-1361
Author(s):  
Da Cheng Liu ◽  
Shi Zhe Liu ◽  
Bin Hao ◽  
Yue Li
Keyword(s):  
Solid Waste ◽  
Chemical Stability ◽  
Total Mass ◽  
Sintering Temperature ◽  
Catalyst Support ◽  
Mass Ratio ◽  
Mineral Phase ◽  
Porous Catalyst ◽  
The Masses ◽  
Bauxite Tailing

Porous catalyst support was prepared using gangue of bauxite tailing which was a solid waste material. It was found that the mass ratio of gangue of bauxite and knar clay was 4: 1. The masses of cellulose and water were individually 1 wt% and 25 wt% of the total mass of gangue of bauxite tailing and knar clay. The pore forming agent M was optimum among the selected pore forming agents. The pore forming agent M didn’t residue in support after sintering so that the support wasn’t polluted. The appropriate addition of the pore forming agent M was 4%, and the catalyst support with the porosity of 41.3% was preparated. The appropriate sintering temperature and holding time were 1250 °C and 2.0 h, respectively. Mullite and quartz were the main mineral phase of the porous catalyst support and the catalyst support have good chemical stability and heat-resisting property.

The staining pattern of the tropomyosin sequence is displayed in a new paracrystal

1986 ◽  
Vol 44 ◽  
pp. 150-151
Author(s):  
M.K. Lamvik ◽  
L.L. Klatt
Keyword(s):  
Amino Acid ◽  
Amino Acid Sequence ◽  
Staining Pattern ◽  
Banding Patterns ◽  
Mass Thickness ◽  
New Form

Tropomyosin paracrystals have been used extensively as test specimens and magnification standards due to their clear periodic banding patterns. The paracrystal type discovered by Ohtsuki1 has been of particular interest as a test of unstained specimens because of alternating bands that differ by 50% in mass thickness. While producing specimens of this type, we came across a new paracrystal form. Since this new form displays aligned tropomyosin molecules without the overlaps that are characteristic of the Ohtsuki-type paracrystal, it presents a staining pattern that corresponds to the amino acid sequence of the molecule.

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