Adsorption of sucrose on zeolites

Fornefett, Iris; Rabet, Davud; Buttersack, Christoph; Buchholz, Klaus

doi:10.1039/c5gc02832a

Cited by 22 publications

(6 citation statements)

References 59 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The mesoporous volume of the USY zeolite is higher in comparison to the HY2.5 zeolite due to the partial destruction of the structure during the aluminum extraction procedure performed by the supplier. The measured chemical and textural properties of the zeolites are similar to the characterization results obtained for these materials in the literature . The MCM‐41 solid did not present any microporosity as shown in Table and Figure SI‐2 (nitrogen sorption isotherms), also the obtained surface area, calculated using the α‐plot method, was around 1000 m 2 .g −1 which is in a good agreement with the results shown by Grün et al …”

Section: Resultssupporting

confidence: 89%

“…The measured chemical and textural properties of the zeolites are similar to the characterization results obtained for these materials in the literature. [63][64][65][66] The MCM-41 solid did not present any microporosity as shown in Table 1 and Figure SI-2 (nitrogen sorption isotherms), also the obtained surface area, calculated using the α-plot method, was around 1000 m 2 .g À 1 which is in a good agreement with the results shown by Grün et al [43]…”

Section: Dft Calculation Of the Frequencies Of Organonitrogen Compounsupporting

confidence: 88%

See 1 more Smart Citation

In Situ IR‐ATR Study of the Interaction of Nitrogen Heteroaromatic Compounds with HY Zeolites: Experimental and Theoretical Approaches

et al. 2019

View full text Add to dashboard Cite

In the present work, the liquid‐solid interaction of liquid N‐heteroaromatic compounds, commonly present in the petroleum feedstocks of the refineries, with Y zeolites used as hydrocracking catalysts was followed using IR‐ATR spectroscopy. The inhibition of the zeolitic acid sites by strongly basic pyridine and weakly basic indole was highlighted using a continuous flow IR‐ATR cell. Results were assessed by Density Functional Theory calculations to compute the vibrational frequencies of pyridine and indole according to the nature of the interaction sites: silanol groups or acidic OH groups. The study points out that IR‐ATR spectroscopy opens the way for investigating the interaction modes of low vapor pressure molecules (e. g. indole) that present an inherent difficulty to be operated in the gas phase. Moreover, the IR‐ATR makes possible the analysis of the little‐explored low wavenumber zone (<800 cm−1), that presents informative vibrational modes on the adsorption mode of N‐molecules. Hence, this work points out that for pyridine, the bands at 686 and 727 cm−1 are characteristic of pyridinium species formed over zeolitic OH groups, meanwhile, the signals at 703 and 750 cm−1, are associated to pyridine in interaction with silanol groups. The IR‐ATR study reveals that indole, a weakly basic compound, can be protonated on acidic Y zeolites as unambiguously evidenced by the formation of the bands at 1617, 1608, 1543 and 705 cm−1. Findings here exposed are crucial for studying inhibitory effects exerted by weak nitrogenated compounds on acidic materials during hydrocracking processes.

show abstract

Section: Resultssupporting

confidence: 89%

Section: Dft Calculation Of the Frequencies Of Organonitrogen Compounsupporting

confidence: 88%

In Situ IR‐ATR Study of the Interaction of Nitrogen Heteroaromatic Compounds with HY Zeolites: Experimental and Theoretical Approaches

et al. 2019

View full text Add to dashboard Cite

show abstract

“…To obtain high-quality saccharide, several separation techniques have been applied in the saccharides purification process, including vacuum evaporation [13], adsorption [14], precipitation by ethanol [15], ion exchange [16], chromatography [17] and membrane separation technology [18,19], as shown in Table 2. In comparison, membrane technology, i.e., nanofiltration (NF), is a promising technology for separation and purification of saccharides due to low energy consumption, reduced environmental impact and, in particular, the maintenance of the intrinsic properties of the product during the separation process [20].…”

Section: Introductionmentioning

confidence: 99%

Nanofiltration for separation and purification of saccharides from biomass

Tan

Luo

et al. 2021

Front. Chem. Sci. Eng.

View full text Add to dashboard Cite

Saccharide production is critical to the development of biotechnology in the field of food and biofuel. The extraction of saccharide from biomass-based hydrolysate mixtures has become a trend due to low cost and abundant biomass reserves. Compared to conventional methods of fractionation and recovery of saccharides, nanofiltration (NF) has received considerable attention in recent decades because of its high selectivity and low energy consumption and environmental impact. In this review the advantages and challenges of NF based technology in the separation of saccharides are critically evaluated. Hybrid membrane processes, i.e., combining NF with ultrafiltration, can complement each other to provide an efficient approach for removal of unwanted solutes to obtain higher purity saccharides. However, use of NF membrane separation technology is limited due to irreversible membrane fouling that results in high capital and operating costs. Future development of NF membrane technology should therefore focus on improving material stability, antifouling ability and saccharide targeting selectivity, as well as on engineering aspects such as process optimisation and membrane module design.

show abstract

“…Previous work has mainly focused on studying the mass transfer in single component systems, e.g. sugar molecules in aqueous solutions, [20][21][22][23][24][25][26] simple alcohols, ketones, and aromatics 27,28 or amino acids. 29 Relevant data is summarized in Table 1.…”

Section: Introductionmentioning

confidence: 99%

Mass transfer limitations in binderless ZSM‐5 zeolite granules during adsorption of flavour compounds from aqueous streams

Gernat

Rozenbroek

Brouwer

et al. 2020

J of Chemical Tech & Biotech

View full text Add to dashboard Cite

BACKGROUND: Recently, a new process concept has been proposed to selectively adsorb wort off-flavours, i.e. aldehydes, from alcohol-free beers with hydrophobic zeolites. RESULTS: In this work, we investigated the uptake of a mixture of wort flavour compounds (2-methylpropanal, 2-methylbutanal, 3-methylbutanal, furfural, and methional), from a model solution onto binderless hydrophobic ZSM-5 zeolite granules in order to quantify mass transfer parameters and identify bottlenecks. Subsequently, the homogenous solid diffusion model was employed to regress the effective diffusion coefficients for each molecule and experimental condition, which ranged between 10 −15 and 10 −13 m 2 s −1 , indicating strong intraparticle mass transfer limitation. Furthermore, it was found that the effective diffusion coefficient is inversely correlated to the molecules' hydrophobicity, expressed as the logD value and its isotherm affinity constant. CONCLUSION: These results give valuable insight to design and improve the adsorbent material and an off-flavour removal unit at industrial scale.

show abstract

Adsorption of sucrose on zeolites

Abstract: The adsorption of sucrose on FAU type zeolites was measured depending on the ratio of Si/Al and the solvent composition (ethanol–water).

Cited by 22 publications

References 59 publications

In Situ IR‐ATR Study of the Interaction of Nitrogen Heteroaromatic Compounds with HY Zeolites: Experimental and Theoretical Approaches

In Situ IR‐ATR Study of the Interaction of Nitrogen Heteroaromatic Compounds with HY Zeolites: Experimental and Theoretical Approaches

Nanofiltration for separation and purification of saccharides from biomass

Mass transfer limitations in binderless ZSM‐5 zeolite granules during adsorption of flavour compounds from aqueous streams

Contact Info

Product

Resources

About