Evaluation of Amberlyst15 for hydrolysis of alkali pretreated rice straw and fermentation to ethanol

Meena, S.; Navatha, S.; Devi, B.L.A. Prabhavathi; Prasad, R. B. N.; Pandey, Ashok; Sukumaran, Rajeev K.

doi:10.1016/j.bej.2015.03.009

Cited by 20 publications

(10 citation statements)

References 21 publications

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“…A preliminary investigation regarding the effect of the Amberlyst-70/Arundo donax L. weight ratio on the xylose recovery was carried out at 160 • C for 20 min, keeping constant the biomass loading (5 wt%) and ranging the Amberlyst-70/Arundo donax L. weight ratio between 0.1-0.3 wt/wt (runs 1-3, Tables 3 and 4). These reaction conditions were selected on the basis of previous literature research [40,41]. As reported in Table 3, the increase of the catalyst/substrate weight ratio from 0.1 to 0.3 wt/wt caused an increase of the biomass solubilisation, from 31.5 to 47.7 wt%, together with the improvement of sugars yields.…”

Section: Microwave-assisted Hydrolysis Of Giant Reed Hemicellulose Tomentioning

confidence: 99%

“…Therefore, common stainless steels cannot be adopted for the acid hydrothermal treatments, which instead require special alloys, such as various grades of Hastelloy, zirconium or other corrosion-resistant alloys, which ensure excellent corrosion resistance to acids, even at high severity conditions [37]. These issues drove the research towards the employment of low-cost acid solid catalysts, such as styrene-based sulfonic acid resins (Amberlysts) [38][39][40][41][42][43][44]. The use of these catalysts can provide a large number of advantages over the traditional homogeneous acid catalysts: (i) better reaction control, (ii) reduced formation of by-products, (iii) easy and safe operation with minor corrosion problems compared to homogeneous catalysis, (iv) advantageous recovery of the catalyst with less waste disposal.…”

Section: Introductionmentioning

confidence: 99%

“…However, also heterogeneous catalysts still present some problems, in particular the inefficient solid-solid interaction between the biomass and the catalyst, which implies hampered hydrolysis. For this reason, the acid solid catalysts, such as Amberlyst-15, zeolites and ad hoc synthesized carbon-based solid acids, were used in combination with ionic liquids [41,43], which are able to dissolve cellulose and even raw lignocellulosic biomasses, or as catalysts for substrates pretreated by ball-milling [42] or acid/alkali solutions [40,44], in this last case not solving the corrosion problem. Different raw feedstocks and heterogeneous catalysts were reported in the literature for the hydrolysis of hemicellulose and cellulose, as summarized in Tables 1 and 2, respectively.…”

Section: Introductionmentioning

confidence: 99%

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Multi-Step Exploitation of Raw Arundo donax L. for the Selective Synthesis of Second-Generation Sugars by Chemical and Biological Route

et al. 2020

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Lignocellulosic biomass represents one of the most important feedstocks for future biorefineries, being a precursor of valuable bio-products, obtainable through both chemical and biological conversion routes. Lignocellulosic biomass has a complex matrix, which requires the careful development of multi-step approaches for its complete exploitation to value-added compounds. Based on this perspective, the present work focuses on the valorization of hemicellulose and cellulose fractionsof giant reed (Arundo donax L.) to give second-generation sugars, minimizing the formation of reaction by-products. The conversion of hemicellulose to xylose was undertaken in the presence of the heterogeneous acid catalyst Amberlyst-70 under microwave irradiation. The effect of the main reaction parameters, such as temperature, reaction time, catalyst, and biomass loadings on sugars yield was studied, developing a high gravity approach. Under the optimised reaction conditions (17 wt% Arundo donax L. loading, 160 °C, Amberlyst-70/Arundo donax L. weight ratio 0.2 wt/wt), the xylose yield was 96.3 mol%. In the second step, the cellulose-rich solid residue was exploited through the chemical or enzymatic route, obtaining glucose yields of 32.5 and 56.2 mol%, respectively. This work proves the efficiency of this innovative combination of chemical and biological catalytic approaches, for the selective conversion of hemicellulose and cellulose fractions of Arundo donax L. to versatile platform products.

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Section: Microwave-assisted Hydrolysis Of Giant Reed Hemicellulose Tomentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Multi-Step Exploitation of Raw Arundo donax L. for the Selective Synthesis of Second-Generation Sugars by Chemical and Biological Route

et al. 2020

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“…The attractiveness of the sector of conventional biofuels, that is, methyl esters and bioethanol, has been analysed by many authors starting from 2007, and the results have been published in many articles [63][64][65][66]. Since 2013, the sector of lignocellulosic bioethanol was also assessed.…”

Section: Comparison Of Attractiveness Of the Biofuel And Electric Carmentioning

confidence: 99%

Selected Aspects of Biofuels Market and the Electromobility Development in Poland: Current Trends and Forecasting Changes

et al. 2019

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This work presents basic information associated with markets of selected alternative fuels used in transport, such as methyl esters, conventional bioethanol and lignocellulosic bioethanol, and the market of electrical vehicles. Legal conditions, which stimulate development and regulate the mode of functioning of the liquid biofuel market until 2020 are discussed, based on provisions of EU directives. Data on biofuel production in Poland are presented, as well as biofuel consumption in the EU, the USA and Brazil in 2017. The most important conclusions of the proposal for a directive on the promotion of renewable energy sources in transport in EU member states in years 2021–2030 are discussed. The authors have also indicated the key legal and territorial conditions associated with the development of electromobility and present basic information on electric vehicles in Poland and Europe. The results of the research on the attractiveness of these sectors in 2018 are presented and compared with the results obtained in years 2007–2017. A score-based sector attractiveness method was used in the research.

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“…In order to economize the fermentation process, many kinds of residue or waste material in industry were employed as alterative medium component, such as corn fiber (Chen et al 2011), orange peels (Mohsin et al 2018), straw (Meena et al 2015), sugarcane bagasse hemicellulose (Tsigie et al 2011), and cane molasses (Liu et al 2008). These were successfully used for the production of bulk chemicals.…”

Section: Introductionmentioning

confidence: 99%

Effective utilization of wastewater for valuable validamycin A biosynthesis by Streptomyces hygroscopicus K2509 in plant-scale bioreactor

Zou

Wang²,

Mohsin

et al. 2018

Bioresour. Bioprocess.

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Background:The continuous escalation in wastewater production with declining dependency on conventional resources as a result of rapid urbanization, increasing global water scarcity and growing population have initiated many researchers to look out for efficient means of utilizing wastewater. In this regard, an effectual process economizing approach has been achieved, upon utilizing the discharged wastewater from validamycin A recovery process in fermentation medium as a replacement of costly tap water. Results:In this study, wastewater was successfully used as a fermentation medium for the production of validamycin A in plant-scale bioreactor. Moreover, a new strain Streptomyces hygroscopicus K2509 was screened showing a good production capability in this low-cost culture environment and showed maximum validamycin A production and productivity of 21.23 g/L and 0.29 g/L h, respectively. Execution of this study has managed the effective utilization of wastewater by reducing 12.42% production cost per kilogram of validamycin A in an environmental friendly way. Conclusion:The novel successful approach for using process wastewater even on being executed in plant-scale bioreactor was proved cost effective. In short, the presented effective way of utilizing wastewater in study will definitely serve as potentially cheap fermentation medium upon replacing tremendously used expensive tap water.

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Evaluation of Amberlyst15 for hydrolysis of alkali pretreated rice straw and fermentation to ethanol

Cited by 20 publications

References 21 publications

Multi-Step Exploitation of Raw Arundo donax L. for the Selective Synthesis of Second-Generation Sugars by Chemical and Biological Route

Multi-Step Exploitation of Raw Arundo donax L. for the Selective Synthesis of Second-Generation Sugars by Chemical and Biological Route

Selected Aspects of Biofuels Market and the Electromobility Development in Poland: Current Trends and Forecasting Changes

Effective utilization of wastewater for valuable validamycin A biosynthesis by Streptomyces hygroscopicus K2509 in plant-scale bioreactor

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