Xylitol production from lignocellulosics: Are corn biomass residues good candidates?

Irmak, Sibel; Canısağ, Hazal; Vokoun, Conner; Meryemoğlu, Bahar

doi:10.1016/j.bcab.2017.07.010

Cited by 31 publications

(26 citation statements)

References 12 publications

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“…Xylitol is a pentose sugar alcohol with important applications because of its strong sweetening properties and capacity to inhibit microbial growth, as well as for its low calorie content, and lack of carcinogenic and cariostatic properties. It has been widely used as a replacement for sucrose in the food and pharmaceutical industries (Aguirre‐Zero, Zero, & Proskin, ; Imark, Canisag, Vokoun, & Meryemoglu, ; Lynch & Milgrom, ; Ronda, Gómez, Blanco, & Caballero, ). In addition, xylitol is considered one of the 12 major high added‐value intermediates that can be produced from biomass, due to it is being a building block for a variety of basic chemicals (Werpy & Petersen, ).…”

Section: Introductionmentioning

confidence: 99%

Xylitol production on sugarcane biomass hydrolysate by newly identified Candida tropicalis JA2 strain

Morais

Pacheco

Trichez

et al. 2019

Yeast

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Xylitol is a building block for a variety of chemical commodities, besides being widely used as a sugar substitute in the food and pharmaceutical industries. The aim of this work was to develop a microbial process for xylitol production using sugarcane bagasse hydrolysate as substrate. In this context, 218 non-Saccharomyces yeast strains were screened by growth on steam-exploded sugarcane bagasse hydrolysate containing a high concentration of acetic acid (8.0 g/L). Seven new Candida tropicalis strains were selected and identified, and their ability to produce xylitol on hydrolysate at low pH (4.6) under aerobic conditions was evaluated.The most efficient strain, designated C. tropicalis JA2, was capable of producing xylitol with a yield of 0.47 g/g of consumed xylose. To improve xylitol production by C. tropicalis JA2, a series of experimental procedures were employed to optimize pH and temperature conditions, as well as nutrient source, and initial xylose and inoculum concentrations. C. tropicalis JA2 was able to produce 109.5 g/L of xylitol with a yield of 0.86 g/g of consumed xylose, and with a productivity of 2.81 g·L·h, on sugarcane bagasse hydrolysate containing 8.0 g/L acetic acid and177 g/L xylose, supplemented with 2.0 g/L yeast nitrogen base and 4.0 g/L urea. Thus, it was possible to identify a new C. tropicalis strain and to optimize the xylitol production process using sugarcane bagasse hydrolysate as a substrate. The xylitol yield on biomass hydrolysate containing a high concentration of acetic acidobtained in here is among the best reported in the literature.

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Section: Introductionmentioning

confidence: 99%

Xylitol production on sugarcane biomass hydrolysate by newly identified Candida tropicalis JA2 strain

Morais

Pacheco

Trichez

et al. 2019

Yeast

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“…The BET results exclude the textual effect on performance enhance of the EG reduction method on Pt/AC. XRD patterns (refer to Figure 4.6), reveal that the peak intensity of platinum in Pt/AC with further reduction was much larger than the ones in fresh Pt/AC, especially for Pt (111), Pt (200) and Pt (220) [352]. This intensity difference indicates that the particle size of the Pt/AC after post-treatment is larger than the fresh one.…”

Section: Optimization Of Jm Pt/ac Via Ethylene Glycol Reductionmentioning

confidence: 96%

“…Furfural yield of 72% could be accomplished over zeolite embedded siliceous TUD-1 mesoporous matrix [197,198]. Xylitol can be produced from xylose, xylans or raw biomass feedstock [199][200][201][202], which plays an important role in cosmetic, pharmaceutical industry and food additive industry.…”

Section: )5-hydroxymethylfurfural (Hmf) Hmf Has Been Examined Extenmentioning

confidence: 99%

Biomass conversion and upgrading over carbon catalyst

Chen¹

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Biomass conversion and upgrading are promising solutions for energy shortage and environment problems. Located in Southeast Asia, Singapore is surrounded by abundant biomass resource in its neighboring countries. However, most of the biomass feedstock is underutilization. Cellulose, which represents the most abundant biomass resource, has been examined over noble metal supported carbon catalyst as an example of biomass conversion. As a Johnson Matthey (JM) supported program, we examined cellulose hydrogenation over Pt/AC produced from JM by the trial-and-error method. After tuning the reaction conditions, a sorbitol yield up to 25% is obtained. We also proposed a novel and effective catalyst optimization method which can further improve the sorbitol yield to 50% by further reducing the Pt/AC in ethylene glycol. This catalytic performance improvement is attributed to the effect of particle size according to XRD and TEM results. CV scans of the Pt/AC indicate that the decline of platinum's oxidation and reduction activity after EG treatment may suppress the side reactions during cellulose hydrogenation, hence improve sorbitol yield. Ruthenium has been proved as an ideal catalyst in biomass conversion, especially for cellulose hydrogenation. However, studies of such reactions are extremely time-consuming due to the numerous side reactions and the complexity of interactions among reaction parameters. In this work, we introduced multivariate analysis method for the study of cellulose hydrogenation. The effect of temperature, hydrogen pressure, catalyst amount and ruthenium loading were comprehensively explored based on a response surface design III (RSD). Among all the 26 hydrogenation reactions, the highest sorbitol yield of 71.9% was obtained. The reaction data was then used to produce a regression model which shows strong statistical significance and high accuracy. Though this model, we evaluated the effectiveness of all the reaction parameters. It was found that ruthenium loading and temperature were the two main driving forces for sorbitol yield. High sorbitol yield could only be obtained while ruthenium loading and temperature were well tuned. The synergistic effects among reaction parameters were well presented with the help of contour plots and surface plots generated from the model. Lastly, a prediction formula according to the reaction data was constructed to predict the sorbitol yield under other reaction conditions. Sorbitol, which is the main product of cellulose hydrogenation, has been examined over sulfonated carbon catalysts as an example of biomass upgrading. The sulfonated carbon catalysts show high catalytic activity towards the synthesis of isosorbide from sorbitol, with a yield up to 60% with negligible performance loss for five consecutive runs. The sulfuric groups are identified as the main active sites for sorbitol dehydration. The physical and chemical properties of the catalysts are evaluated by advanced and extensive characterization techniques, such as XRD, TEM, SEM, BET, FTIR, EA, EDAX, TG...

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“…However, works related to the catalytic hydrogenation of real biomass or pentosane-rich hydrolysates are scarce Irmak et al, 2017). Chemical ) and…”

Section: Introductionmentioning

confidence: 99%

“…Since the content of monosaccharides in the hydrolysate is quite low (of ca. 0.8 wt.%), additional concentration and purification stages to obtain sugars-rich hydrolysates must be considered before the hydrogenation process (Irmak et al, 2017). The presence of other biomass components in the hydrolysates (e.g.…”

Section: Introductionmentioning

confidence: 99%

Wheat bran biorefinery: Valorization of hemicelluloses to sugar alcohols. Fractionation - Hydrolysis - Purification - Hydrogenation

Bastardo¹

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This is related to the type of bond existing between arabinose (linked by α-glycosidic bonds, weak) and xylose (linked by β-glycosidic bonds, strong) molecules. The easier access to the side chains (composed of arabinose) than to the backbone (composed of xylose) also explains the faster release of arabinose than xylose. Prior to the hydrogenation of sugars from wheat bran, a kinetic study with sugar model mixtures was carried out in Chapter 4 using ruthenium catalysts supported on H-ZSM-5 ABSTRACT 6 zeolites with different SiO2/Al2O3 ratio (23 and 80). Reaction temperature was varied from 80 to 120 ºC and time between 5 and 30 minutes. Likewise, the influence of catalyst loading was analyzed in the range 0-0.060 g Ru•g C-1. The acidity of the support (SiO2/Al2O3 ratio) played a crucial role in the reaction mechanism. Ru/H-ZSM-5 (80) resulted in higher conversion and selectivity than Ru/H-ZSM-5 (23), since low acidic supports promoted hydrogenation over secondary reaction pathways, such as isomerization. Experimental results showed that C5 sugars were faster hydrogenated than C6 sugars. Indeed, the optimum temperature for arabinose and xylose hydrogenation was 100 ºC, whereas 120 ºC was the most suitable temperature for glucose hydrogenation. In this sense, operating conditions could be tuned to maximize the yield of pentitols and/or hexitols. Additionally, experimental data was successfully reproduced by a pseudo-first order kinetic model with relatively low absolute deviations (< 11%) and high regression coefficients (> 0.950). The activation energy values were 47.9 kJ•mol-1 , 43.7 kJ•mol-1 and 92.0 kJ•mol-1 for the hydrogenation of arabinose, xylose and glucose, respectively, using Ru/H-ZSM-5 (80) as catalyst. In Chapter 5, the purification of wheat bran hydrolysates and the subsequent catalytic production of sugar alcohols was investigated. This hydrolysate was composed of xylose (5.6 g•L-1), arabinose (2.8 g•L-1), glucose (0.8 g•L-1), furfural (0.3 g•L-1), proteins (0.9 g•L-1), different inorganic elements (Mg, Ca, K, S) and some lignin derivatives. A purification strategy was defined to maximize the sugar content in this hydrolysate. The process was based on the selective recovery of sugars by anionic extraction with a boronic acid (hydroxymethyl phenylboronic acid) which was dissolved in an organic phase composed by a quaternary ammonium salt (Aliquat ® 336) and 1-octanol. The sugars were then back-extracted in an acidic solution which was further purified by means of ion exchange resins (Amberlyst ® 15 and Amberlite ® IRA-96). After this process, an aqueous ABSTRACT 7 phase with a purity in sugars of 90% (based on carbon balance) was obtained. It was free of inorganic salts and proteins and it had a lower content of sugar degradation products and lignin derivatives than the initial hydrolysate. Importantly, the organic phase was successfully recycled. Purified sugars were then hydrogenated over Ru/H-ZSM-5 (80). A high pentitols yield of ~70% with 100% selectivity was achieved at 100 ºC after 10 minutes wi...

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Xylitol production from lignocellulosics: Are corn biomass residues good candidates?

Cited by 31 publications

References 12 publications

Xylitol production on sugarcane biomass hydrolysate by newly identified Candida tropicalis JA2 strain

Xylitol production on sugarcane biomass hydrolysate by newly identified Candida tropicalis JA2 strain

Biomass conversion and upgrading over carbon catalyst

Wheat bran biorefinery: Valorization of hemicelluloses to sugar alcohols. Fractionation - Hydrolysis - Purification - Hydrogenation

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