scholarly journals Hydrolysis of Straw in Ionic Liquids with Acid as Catalyst under Microwave Irradiation

2015 ◽  
Vol 2015 ◽  
pp. 1-6 ◽  
Author(s):  
Yuanjing Zhang ◽  
Gang Wei ◽  
Guangyi Yu ◽  
Ning Qiao
Keyword(s):  
Ionic Liquids ◽  
Microwave Irradiation ◽  
Reducing Sugar ◽  
Raw Material ◽  
Conventional Heating ◽  
Acid Catalysts ◽  
Mass Ratio ◽  
Corn Straw ◽  
Experimental Conditions ◽  
Hydrolysis Of

With ionic liquids as solvents and corn straw as raw material, different processes of lignocellulose pretreatment with acid as catalyst were studied under conventional heating/microwave irradiation and the reducing sugar was measured. The results indicated that acid can accelerate hydrolysis reaction of corn straw into reducing sugar with ionic liquids as solvent, and microwave irradiation was more efficient in pretreatment of corn straw than conventional heating. The influences of different acid catalysts, the concentration of acid, temperature, mass ratio of straw/[Bmim]Cl, and the amount of refill water were mainly tested, and the optimum experimental conditions are thus determined.

scholarly journals HIDROLISIS RUMPUT LAUT (Glacilaria sp.) MENGGUNAKAN KATALIS ENZIM DAN ASAM UNTUK PEMBUATAN BIOETANOL

Jurnal Kimia ◽  
2016 ◽  
Author(s):  
Yohanes Armawan Sandi ◽  
Wiwik Susanah Rita ◽  
Yenni Ciawi
Keyword(s):  
Gas Chromatography ◽  
Hydrochloric Acid ◽  
Sulphuric Acid ◽  
Ethanol Concentration ◽  
Reducing Sugar ◽  
Optimum Concentration ◽  
Raw Material ◽  
Optimum Length ◽  
Hydrolysis Of

The aim of this research is to determine the effect of enzyme and acids concentration on the yield of glucose produced in the hydrolysis of Glacilaria sp. in the production of bioethanol. The concentrations of cellulase used were 200 units/mL, 400 units/mL, 600 units/mL, 800 units/mL and the concentration of sulphuric acid (H2SO4) and hydrochloric acid (HCl) used were 1%, 3%, 5%, 7% (w/v). The concentration of reduction sugar was determined using Anthrone and analyzed using UV-Vis spectrophotometry and the determination of ethanol concentration was carried out by using gas chromatography. The results showed that the contents of reducing sugar produced by sulphuric acid (H2SO4) hydrolysis were 26,19%; 36,69%; 41,40%; 45,0% (v/v), by hydrochloric acid (HCl) were 12,12%; 14,03%; 15,17%; 16,50% (v/v), and by cellulase enzyme were 46,15%; 46,73%; 47,68%; 48,25% (v/v). Optimum concentration of reducing sugar produced by hydrolysis using 800 units/mL cellulase was 48,25% (v/v). The optimum length of fermentation to produce bioethanol using Glacilaria sp. as raw material was 5 days. In the fermentation, inoculum with a concentrations of 5% and 10% (w/v) produced 0,85% and 1,51% (v/v) ethanol.

Reducing Sugar Production from Agricultural Wastes by Acid Hydrolysis

2016 ◽  
Vol 675-676 ◽  
pp. 31-34
Author(s):  
Achara Kleawkla ◽  
Pannarai Chuenkruth
Keyword(s):  
Sulfuric Acid ◽  
Corn Stover ◽  
Agricultural Waste ◽  
Sugar Content ◽  
Reducing Sugar ◽  
Agricultural Wastes ◽  
Raw Material ◽  
Hydrolysis Time ◽  
Industrial Processing ◽  
Hydrolysis Of

Sugar is very important raw material of many industries such as food, beverage and renewable energy. In this research, pretreatment and hydrolysis of agricultural wastes to produce reducing sugars for an ethanol production were investigated. The rice stalk and corn stover from agricultural wastes were firstly pretreated with sodium hydroxide at 121 °C in different time as 20 30 and 40 minutes for removal of lignin. After that, the condition of hydrolysis using sulfuric acid of the pretreated rice stalk and corn stover was optimized. The optimum condition that obtained the highest reducing sugar content from rice stalk and corn stover of 76.12 and 136.25 mg/ml were using 1.0 % v/v sulfuric acid at temperature of 121 °C for a hydrolysis time of 40 minutes. This research made value adding in the industrial processing, decrease environmental problem and reduce global warming crisis by optimized utilization of agricultural waste.

scholarly journals Functional acidic ionic liquids as effective solvents for the fractionation of lignocelluloses

BioResources ◽  
2019 ◽  
Vol 14 (2) ◽  
pp. 4721-4732
Author(s):  
Shi Jia Dong ◽  
Bi Xian Zhang ◽  
Peng Zhang ◽  
Kun Yang Wu ◽  
Xin Miao He ◽  
...  
Keyword(s):  
Ionic Liquids ◽  
Lignin Degradation ◽  
Degradation Products ◽  
Reducing Sugar ◽  
Alkaline Extraction ◽  
Enzymatic Conversion ◽  
Acidic Ionic Liquids ◽  
Lignin Degradation Products ◽  
High Yields ◽  
Hydrolysis Of

There is increasing interest in the application of ionic liquids for the pretreatment and fractionation of lignocelluloses. In this study, a series of functional acidic ionic liquids (ILs) with various heterocyclic organic cations were synthesized. Corn stalks were successfully fractionated into lignin, hemicelluloses, and cellulose when ultrasonically pretreated with ILs at 70 °C for 3 h, and subsequently treated with alkaline extraction. High yields of IL-isolated lignin (18.3% to 19.6%) and (8.3% to 14.6%) were obtained using ILs in the absence and presence of water, respectively. The yield of cellulose ranged from 40.0 to 77.0% from IL treatments, whereas the yield of hemicelluloses ranged from 1.1% to 17.3%. Enzymatic hydrolysis of the isolated cellulose residual produced 89.2% to 94.9% reducing sugar with 77.8% to 86.1% glucose, which corresponded to 80.5% to 91.4% enzymatic conversion of cellulose. Syringol and vanillin were found as the main lignin degradation products.

scholarly journals Hydrolysis of Soybean By-Products to Prepare Reducing Sugar in Ionic Liquids

2014 ◽  
Vol 26 (24) ◽  
pp. 8475-8478 ◽  
Author(s):  
X.M. Hu ◽  
B.X. Zhang ◽  
S.J. Dong ◽  
Y. Zhao ◽  
Y.F. Gao
Keyword(s):  
Ionic Liquids ◽  
Reducing Sugar ◽  
Hydrolysis Of ◽  
By Products

scholarly journals SELEKSI SENYAWA PENGHIDROLISIS UNTUK MENGHASILKAN GULA REDUKSI DARI LIMBAH KULIT ARI KEDELAI SEBAGAI BAHAN FERMENTASI BIOETANOL

Jurnal BIOMA ◽  
2017 ◽  
Vol 13 (1) ◽  
pp. 1-8
Author(s):  
Siska Handayani ◽  
Zulkifliani Zulkifliani ◽  
Adisyahputra Adisyahputra ◽  
Devitra Sakarani
Keyword(s):  
Block Design ◽  
Hydrolysis Product ◽  
Secondary Data ◽  
Reducing Sugar ◽  
Raw Material ◽  
Randomized Block Design ◽  
Two Factors ◽  
Post Hoc ◽  
Hydrolysis Of ◽  
Reducing Sugar Concentration

This study aims to determine the most effective compound used to hydrolyze soy husk waste to produce reducing sugar as raw material for bioethanol fermentation. The study was conducted at the Laboratory of Bioprocess PPPTMGB "LEMIGAS" in April-September 2015. The method used is experiment using a randomized block design consisting of two factors. The first factor is the type of compounds used in the process of hydrolysis, namely H2SO4, HCl, NaOH, and NH3. The second factor is the concentration of hydrolyze compound 0.2%, 0.4%. 0.6%, 0.8%, and 1% (v/v) and every treatment repeated 4 times. Parameters measured were content of reduced sugar hydrolysis product, and secondary data that content of cellulose and hemicellulose also the density of ethanol. Concentration of reducing sugar from hydrolysis of soybean husk is analyzed by two-way ANOVA test. ANOVA analysis result indicate that the best hydrolysis compounds in hydrolizing soybean husk is HCl with the optimum concentration is 0,4%. And there are interactions between treatment of compound used to hydrolyze as well as concentration on reducing sugar concentration (mg/mL) as product from soybean husk waste hydrolysis. Post-hoc test showed that HCl 0,4% produce the highest concentration of reducing sugar at 31.23 mg/mL.

Study on Sugar Production Conditions of Dilute Sulfuric Acid Hydrolysis of Corn Straw

2014 ◽  
Vol 1008-1009 ◽  
pp. 97-100
Author(s):  
Qing Sun ◽  
Shu He Huang ◽  
Bo Wang ◽  
Xiao Run Deng ◽  
Jia Sheng Yi ◽  
...  
Keyword(s):  
Sulfuric Acid ◽  
Reaction Time ◽  
Acid Hydrolysis ◽  
Acid Concentration ◽  
Sulfuric Acid Concentration ◽  
Sugar Yield ◽  
Corn Straw ◽  
Experimental Conditions ◽  
Dilute Sulfuric Acid ◽  
Hydrolysis Of

In this paper, through the study of reducing sugar conditions of corn straw hydrolysis under acidic condition, looking for the production of experimental conditions relatively reasonable. Mainly by dilute sulfuric acid hydrolysis of corn straw by single factor test, effects of sulfuric acid concentration, temperature, reaction time, particle size, ratio of solid to liquid five factors, effects on sugar yield of corn straw. The dilute sulfuric acid concentration 5%, ratio of solid to liquid was 1:14, when the reaction time is 140 min, particle fineness of 120 mesh, the reaction temperature is 100 °C, corn stalk sugar yield reached a maximum 20.11%.

scholarly journals Comparison of Dimethylformamide with Dimethylsulfoxide for Quality Improvement of Distillate Recovered from Waste Plastic Pyrolysis Oil

Processes ◽  
2020 ◽  
Vol 8 (9) ◽  
pp. 1024
Author(s):  
Su Jin Kim
Keyword(s):  
Mass Fraction ◽  
Raw Material ◽  
Pyrolysis Oil ◽  
Mass Ratio ◽  
Initial State ◽  
Simple Distillation ◽  
Experimental Conditions ◽  
Waste Plastic ◽  
Increase Rate

As a part of improving the quality of the distillate (distilling temperature 120–350 °C) recovered from waste plastic pyrolysis oil (WPPO) by simple distillation, the enrichment of paraffin components present in the distillate was compared by the equilibrium extraction of dimethylformamide (DMF) and dimethylsulfoxide (DMSO). Regardless of the solvent used, the concentration increase rate of the paraffin component in the raffinate relative to the raw material was reduced by increasing the mass fraction of water in the solvent in an initial state. On the other hand, it increased by increasing the mass ratio of the solvent to the raw material in an initial state. The enrichment performance of paraffin component in raffinate recovered by DMF was higher than that by DMSO under the same experimental conditions. Furthermore, the two solvents were compared by adding color and the waxing phenomena of recovered raffinate to assess the enrichment performance of paraffin components.

scholarly journals Hydrolysis Optimization of Beneng Taro Tubers (Xantoshoma undipes K. Koch) as Bioethanol Raw Material

2021 ◽  
Vol 4 (2) ◽  
pp. 58-65
Author(s):  
Fenti Visiamah ◽  
Wasinton Simanjuntak
Keyword(s):  
Saccharomyces Cerevisiae ◽  
Reducing Sugar ◽  
Raw Material ◽  
Optimum Amount ◽  
Hydrolysis Time ◽  
Hydrolysis Of

This study conducted to assess the most appropriate method or hydrolysis of beneng taro tuber to optimize the production of bioethanol to investigate the effect of pHs, times, and temperatures on reducing sugar produced. The concentration of reducing sugar was determined using a UV-Vis spectrophotometer.  The result obtained indicated that the optimum amount of reducing sugar (910,875 mg/L ) achieved at pH 10, hydrolysis time of 3 hours, and the temperature of 90 °C.  Fermentation of reducing sugar using the powdered bark of raru plant produced 0,18765 % (v/v) of bioethanol and fermentation using Saccharomyces cerevisiae produced 0,2116 % (v/v) of bioethanol.  

Evaluation of non-thermal effects by microwave irradiation in hydrolysis of waste-activated sludge

2014 ◽  
Vol 70 (4) ◽  
pp. 742-749 ◽  
Author(s):  
I. G. Byun ◽  
J. H. Lee ◽  
J. M. Lee ◽  
J. S. Lim ◽  
T. J. Park
Keyword(s):  
Microwave Irradiation ◽  
Activated Sludge ◽  
Thermal Effect ◽  
Oxygen Demand ◽  
Conventional Heating ◽  
Waste Activated Sludge ◽  
Molecular Formula ◽  
First Order Kinetics ◽  
Soluble Chemical Oxygen Demand ◽  
Hydrolysis Of

The activation energy (Ea) for waste-activated sludge (WAS) hydrolysis was compared between microwave irradiation (MW) and conventional heating (CH) methods to evaluate the non-thermal effect of MW. The microwave-assisted hydrolysis of WAS was assumed to follow the first-order kinetics on the basis of volatile suspended solids (VSS) conversion to soluble chemical oxygen demand (SCOD) for different initial VSS concentrations. By comparing the VSS decrement and the SCOD increment between MW and CH at different absolute temperatures of 323, 348 and 373 K, the average ratio of VSS conversion to SCOD was determined to range from 1.42 to 1.64 g SCOD/g VSS. These results corresponded to the theoretical value of 1.69 g SCOD/g VSS based on the assumption that the molecular formula of sludge was C10H19O3N. Consequently, the Ea of the MW-assisted WAS hydrolysis was much lower than that of CH for the same temperature conditions. The non-thermal effect of MW in the hydrolysis of WAS could be identified with the lower Ea than that of CH.

Microwave Extraction of Triterpene Glucoside from Fructus Leonuri

2013 ◽  
Vol 790 ◽  
pp. 555-557
Author(s):  
Gang Lv ◽  
Zhu Ming ◽  
Ye Shen ◽  
Tan Li ◽  
Xin Sun
Keyword(s):  
Microwave Radiation ◽  
Microwave Power ◽  
Extraction Rate ◽  
Raw Material ◽  
Conventional Heating ◽  
Experimental Conditions ◽  
Solid Ratio ◽  
Assisted Extraction ◽  
Novel Method ◽  
Fast Extraction

In the present study, a new method of microwave-assisted extraction (MAE) has been used to extract triterpene glucoside from Fructus Leonuri. Various experimental conditions, such as microwave radiation time, microwave power, liquid/solid ratio and grinding degree of material were investigated. Optimal conditions of MAE of triterpene glucoside were determined as: duration of microwave radiation 5min, microwave power 495W, size of raw material less than 0.15mm, and ratio of liquid to solid 30:1. Comparing with conventional heating extraction, MAE of triterpene glucoside from Fructus Leonuri showed advantages of less time and high extraction rate. The time used with MAE is only 5 min with 76.56% extraction rate, while the conventional extraction method took two hours with about 68.46% extraction rate. This novel method is suitable for fast extraction of triterpene glucoside from Fructus Leonuri.

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