A new MAS NMR probe for in situ investigations of hydrocarbon conversion on solid catalysts under continuous-flow conditions

1995 ◽  
pp. 1423 ◽  
Author(s):  
Michael Hunger ◽  
Thomas Horvath
Keyword(s):  
Continuous Flow ◽  
Mas Nmr ◽  
Hydrocarbon Conversion ◽  
Flow Conditions ◽  
Solid Catalysts

scholarly journals Biofilm dynamics: linking in situ biofilm biomass and metabolic activity measurements in real-time under continuous flow conditions

2020 ◽  
Vol 6 (1) ◽  
Author(s):  
Kyle B. Klopper ◽  
Riaan N. de Witt ◽  
Elanna Bester ◽  
Leon M. T. Dicks ◽  
Gideon M. Wolfaardt
Keyword(s):  
Real Time ◽  
Metabolic Activity ◽  
Continuous Flow ◽  
Control Strategies ◽  
Mass Function ◽  
Flow Conditions ◽  
Carbon Dioxide Evolution ◽  
Activity Measurements ◽  
The Internet Of Things

Abstract The tools used to study biofilms generally involve either destructive, end-point analyses or periodic measurements. The advent of the internet of things (IoT) era allows circumvention of these limitations. Here we introduce and detail the development of the BioSpec; a modular, nondestructive, real-time monitoring system, which accurately and reliably track changes in biofilm biomass over time. The performance of the system was validated using a commercial spectrophotometer and produced comparable results for variations in planktonic and sessile biomass. BioSpec was combined with the previously developed carbon dioxide evolution measurement system (CEMS) to allow simultaneous measurement of biofilm biomass and metabolic activity and revealed a differential response of these interrelated parameters to changing environmental conditions. The application of this system can facilitate a greater understanding of biofilm mass–function relationships and aid in the development of biofilm control strategies.

Continuous Flow Hyper-Polarized 129Xe-Mas Nmr Studies of Microporous Materials.

2003 ◽  
Vol 775 ◽  
Author(s):  
Andrei Nossov ◽  
Flavien Guenneau ◽  
Marie-Anne Springuel-Huet ◽  
Valérie Montouillout ◽  
Jean-Pierre Cognec ◽  
...  
Keyword(s):  
Continuous Flow ◽  
Nmr Spectra ◽  
Magic Angle Spinning ◽  
Mas Nmr ◽  
Magic Angle ◽  
Original Design ◽  
Nmr Studies ◽  
Powder Samples ◽  
Angle Spinning

Summary:A Magic Angle Spinning (MAS) NMR probe has been designed allowing the in-situ measurements of NMR spectra of working catalyst. The probe was built following the original design of M. Hunger [Hunger, 1995 #2]. It allows the magic angle spinning of powder samples up to 3.5 kHz, under gas flowing conditions, and at temperatures up to 573K.

Direct observation of DME carbonylation in the different channels of H-MOR zeolite by continuous-flow solid-state NMR spectroscopy

2015 ◽  
Vol 51 (94) ◽  
pp. 16868-16870 ◽  
Author(s):  
Ting He ◽  
Pengju Ren ◽  
Xianchun Liu ◽  
Shutao Xu ◽  
Xiuwen Han ◽  
...  
Keyword(s):  
Solid State ◽  
Nmr Spectroscopy ◽  
Direct Observation ◽  
Solid State Nmr ◽  
Continuous Flow ◽  
Mas Nmr ◽  
Solid State Nmr Spectroscopy

Surface acetyl intermediates on HMOR zeolites (CH3CO-Z) were detected during DME carbonylation using in situ continuous-flow 13C MAS NMR spectroscopy.

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