HIDROLISA PATI DARI KULIT SINGKONG (VARIABEL RATIO BAHAN DAN KONSENTRASI ASAM)

EKUILIBIUM ◽  
2013 ◽  
Vol 12 (1) ◽  
Author(s):  
Endang Mastuti
Keyword(s):  
Hydrochloric Acid ◽  
Acid Concentration ◽  
Reaction Rate ◽  
Animal Feed ◽  
Economic Value ◽  
Acid Catalyst ◽  
Operating Conditions ◽  
Starch Hydrolysis ◽  
Reaction Rate Constants ◽  
Cassava Peel

<p>Abstract: Cassava peel is generally used as animal feed and sometimes just thrown away. To<br />increase the economic value of cassava peels used as alternative materials to manufacture<br />glucose by hydrolysis. This study aims to determine the effect of material and the concentration<br />ratio of acid to the peel of cassava starch hydrolysis of the resulting reduction of glucose and<br />starch hydrolysis reaction rate constants of the cassava peel with hydrochloric acid catalyst.<br />Variables remained in the study was 250 ml volume of cooking and temperature 95<br />C (boiling<br />temperature). Variable is the ratio of materials that were reviewed (30 gr, 40 gr, 50 gr and 60 gr)and acid concentration (0.05 N, 0.1 N; 0.15 N; and 0.2 N). Glucose samples were analyzed by<br />using the Lane-Eynon. Data analysis showed the material and the larger the ratio of acid<br />concentration, the glucose formed higher. So also with increasing reaction time, glucose is<br />formed also higher. Operating conditions which result in maximum glucose in the ratio 5:1<br />material and acid concentration 0.2 N. In this study the reaction of first order reaction rate<br />constants obtained in ratio of materials from 0.0116 to 0.0172/min and at variable acid<br />concentrations from 0.0157 to 0.0252/min.<br />Keywords: Cassava peel, hydrolysis, hydrochloric acid<br />o</p>

scholarly journals Kinetics study the decomposition of the cellulose into cellulose nanocrystals by hydrothermal with hydrochloric acid catalyst

2019 ◽  
Vol 10 (1) ◽  
Author(s):  
Zulnazri Zulnazri ◽  
Rozanna Dewi ◽  
Sulhatun Sulhatun ◽  
Nasrun Nasrun
Keyword(s):  
Hydrochloric Acid ◽  
Cellulose Nanocrystals ◽  
Reaction Rate ◽  
Acid Catalyst ◽  
Reaction Rate Constant ◽  
X Ray Diffraction ◽  
Hydrothermal Conditions ◽  
Reaction Rate Constants ◽  
Ft Ir

The aim of this study was to hydrolyzed cellulose nanocrystals as cellulose-based biomass residues from oil palm by using hydrochloric acid under hydrothermal conditions. The characterization of cellulose nanocrystals was determined by FT-IR spectroscopy and X- ray diffraction. The infrared spectroscopy showed there has been a removal of lignin and hemicellulose in the spectrum. Crystallinity which reaches 78.59% was obtained by hydrolysis using hydrochloric acid catalyst 3 mol/L with a reaction time of 1 hour. Based on the graph of -ln CA/CA0 vs. time obtained that Cellulose nanocrystals forming reaction is of first order. The reaction rate constants to the formation of glucose (k2) is greater than the reaction rate constant to the formation of Cellulose nanocrystals (k1), which indicates that the phase of slow reaction is the reaction of the most influential on the overall reaction rate, the reaction of the formation of Cellulose nanocrystals.

PENGARUH KONSENTRASI KATALIS ASAM DAN KECEPATAN PENGADUKAN PADA HIDROLISIS SELULOSA DARI AMPAS BATANG SORGUM MANIS

EKUILIBIUM ◽  
2013 ◽  
Vol 12 (1) ◽  
Author(s):  
Enny Kriswiyanti
Keyword(s):  
Hydrochloric Acid ◽  
Sweet Sorghum ◽  
Reaction Rate ◽  
Acid Catalyst ◽  
Agitation Speed ◽  
First Order ◽  
Reaction Rate Constants ◽  
Glucose Levels ◽  
Hydrolysis Of Cellulose ◽  
Hydrolysis Of

<p>Abstract : Sweet sorghum stem residues contains high enough cellulose (36.92%)so it can be<br />hydrolyzed to glucose. In this research, hydrolysis of cellulose is carried out using hydrochloric<br />acid catalyst. This research aims to determine the effect of acid catalyst concentration and<br />agitation speed on the resulting reduction of glucose levels and determine the reaction rate<br />constant of hydrolysis of sweet sorghum stem residues. The observed variables were the<br />concentration of hydrochloric acid catalyst (0.5 N, 1 N, 1.5 N, 2 N) and the agitation speed (150<br />rpm, 200 rpm, 250 rpm, 300 rpm). Glucose samples were analyzed by using the Lane-Eynon<br />method. Data analysis showed the higher concentration of hydrochloric acid (HCl) and the<br />agitation speed, the levels of reduced glucose that is formed is also higher. In this study by<br />assuming a first order reaction, the reaction rate constants obtained at variable concentrations of<br />hydrochloric acid catalyst ranged from 0.0010 to 0.0033 / minute and at agitation speeds variable<br />ranged from 0.0023 to 0.0030 / minute.<br />Keywords : sweet sorghum stem residues, hydrochloric acid, hydrolysis, cellulose</p>

PENGARUH WAKTU HIDROLISA DAN KONSENTRASI ASAM PADA HIDROLISA PATI KENTANG DENGAN KATALIS ASAM

EKUILIBIUM ◽  
2014 ◽  
Vol 13 (2) ◽  
Author(s):  
Inayati Inayati
Keyword(s):  
Acid Concentration ◽  
Reaction Rate ◽  
Acid Catalyst ◽  
Glucose Production ◽  
Operating Conditions ◽  
Raw Material ◽  
Optimum Operating ◽  
Pseudo First Order Reaction ◽  
Glucose Content ◽  
Glucose Syrup

<p>Abstract: Potato has high content of carbohydrate (starch), so it can be used as raw material<br />for the glucose production. The basic principle to produce glucose from potatoes is hidrolysis of<br />polysaccharides (starch) into monosaccharides and disaccharides. In this work, potatoes were<br />converted into glucose syrup by hydrolysis using hydrochloric acid as catalyst. The aim of this<br />work is to study the effect of acid concentration on the reaction rate. Hydrolysis was carried out<br />with constant parameters, namely 20 gram of starch, 300 rpm of its rotational speed and the<br />operating temperature of 100°C, and variable parameters including acid concentration (0.5 N, 1<br />N, 1.5 N, and 2 N) and the hydrolyzing time (30 minutes, 60 minutes, 90 minutes, 120 minutes,<br />and 150 minutes). The glucose content were analyzed using the Lane-Eynon methode. The<br />data analysed showed the higher concentration of acid and time of hydrolysis caused higher<br />glucose formed. Optimum operating conditions was at 2 N HCL as catalyst. In this study, by<br />assuming a pseudo-first order reaction, the reaction rate constants obtained at range of 0.0047<br />to 0.0076/min.<br />Keywords: Potatoes, Starch, Hydrolysis, Acid concentration, Acid catalyst</p>

scholarly journals The green synthesis of a palm empty fruit bunch-derived sulfonated carbon acid catalyst and its performance for cassava peel starch hydrolysis

RSC Advances ◽  
2021 ◽  
Vol 11 (12) ◽  
pp. 6449-6455
Author(s):  
Iryanti Fatyasari Nata ◽  
Chairul Irawan ◽  
Meilana Dharma Putra ◽  
Cheng-Kang Lee
Keyword(s):  
Citric Acid ◽  
Green Synthesis ◽  
Acid Catalyst ◽  
Starch Hydrolysis ◽  
Empty Fruit Bunch ◽  
Carbon Acid ◽  
Cassava Peel

A sulfonated carbon acid catalyst (C–SO3H) was successfully generated from palm empty fruit bunch (PEFB) carbon via hydrothermal sulfonation via the addition of hydroxyethylsulfonic acid and citric acid.

Dissolution kinetics of sepiolite from Eskisehir (Turkey) in hydrochloric and nitric acids

Clay Minerals ◽  
1990 ◽  
Vol 25 (2) ◽  
pp. 207-215 ◽  
Author(s):  
H. Cetisli ◽  
T. Gedikbey
Keyword(s):  
Activation Energy ◽  
Acid Concentration ◽  
Rate Constants ◽  
Reaction Rate ◽  
Dissolution Kinetics ◽  
Particle Sizes ◽  
Initial Particle ◽  
Reaction Rate Constants ◽  
Apparent Activation Energies ◽  
Kinetics Of

AbstractDissolution kinetics of sepiolite from Eskisehir (Turkey) have been investigated at various temperatures and particle sizes using dilute hydrochloric and nitric acids. Dissolution reaction rate constants were calculated and apparent activation energies were dependent on acid concentration. For both acids, apparent activation energy values reached a minimum of ∼11 kcal/mol at an acid concentration of 0·75 M. For the second-order reaction which is independent of the acid concentration, the activation energy was 14·5 kcal/mol for both acids. The reaction rate constants were proportional to the acid concentrations, and inversely proportional to the square-root of the initial particle radii of the sepiolite.

Correlation and prediction of azo dye degradation by nonlinear least-square regression in combined ozonation and ultrasonolysis processes

2011 ◽  
Vol 46 (3) ◽  
pp. 250-258 ◽  
Author(s):  
Masroor Mohajerani ◽  
Mehrab Mehrvar ◽  
Farhad Ein-Mozaffari
Keyword(s):  
Azo Dyes ◽  
Rate Constants ◽  
Reaction Rate ◽  
Synergetic Effect ◽  
Operating Conditions ◽  
Least Square ◽  
Combined Processes ◽  
Reaction Rate Constants ◽  
Least Square Regression ◽  
The Impact

Correlative reaction kinetics based on nonlinear least square regression were obtained to predict the degradation of p-aminophenol (PAP), C.I. Reactive Yellow 84 (RY84), C.I. Reactive Blue 19 (RB19), and C.I. Direct Red 23 (DR23) in combined ultrasonolysis and ozonation. Effects of ultrasonolysis and ozonation as individual processes, as well as the synergetic effect for the degradation of azo dyes, were studied by linear and nonlinear regression methods. An initial dye concentration correlation index (φ) for each compound was developed to study the effects of initial concentrations of organics on their reaction rate constants. Reaction rate constants for the azo dyes’ degradation in ozonation and ultrasonolysis alone and their combination were obtained for different operating conditions. Results showed that ultrasonolysis alone was almost ineffective for decolorization and mineralization of azo dyes, but the combination of ozonation and ultrasonolysis had a significant effect on their degradation. Both ozone dose and ultrasonic density had a direct effect on the reaction rate constants, where the impact of ozone was greater with respect to that of the ultrasound. The synergetic effect of combined processes as a function of ozone concentration and ultrasound density varied from 0 to 5, 0 to 4, and 0 to 35 for RY84, RB19, and DR23, respectively.

On the Accurate Determination of Reaction Rate Constants in Batch-Type Solar Photocatalytic Oxidation Facilities

1994 ◽  
Vol 116 (1) ◽  
pp. 19-24 ◽  
Author(s):  
J. F. Klausner ◽  
A. R. Martin ◽  
D. Y. Goswami ◽  
K. S. Schanze
Keyword(s):  
Rate Constant ◽  
Rate Constants ◽  
Photocatalytic Oxidation ◽  
Reaction Rate ◽  
Accurate Determination ◽  
Operating Conditions ◽  
Total System ◽  
Reaction Rate Constants ◽  
Batch Type

A rigorous analysis is presented which allows for the accurate determination of reaction rate constants in batch-type photocatalytic oxidation facilities as well as any other batch-type chemical process where the reaction kinetics are known. Experimental verification of the model is accomplished using an indoor facility which utilizes an ultraviolet (UV) lamp source for the destruction of 4-chlorophenol (4CP). It has been observed that the first-order reaction rate constant increases by about 50 percent with an order of magnitude increase in flow rate. Using the present analysis, it is demonstrated that the approximate method of determining rate constants (the product of the apparent rate constant and the ratio of the reactor volume to the total system volume) is useful over a surprisingly wide range of operating conditions.

STUDYING THE KINETIC CHARACTERISTICS OF THE EXTRACTION OF ANTHOCYANINS FROM THE SQUEEZE OF KRASNOSTOP ZOLOTOVSKY

2020 ◽  
Author(s):  
M.A. Egyan ◽  
Keyword(s):  
Reaction Rate ◽  
Sugar Content ◽  
Extraction Process ◽  
Efficiency Coefficient ◽  
Kinetic Characteristics ◽  
Reaction Rate Constants ◽  
Solids Content ◽  
Kinetics Of ◽  
Process Speed

The article shows studies characterizing the quality of the squeeze: the mechanical composition of the squeeze is determined, the structural moisture of each component is determined, the sugar content in the formed process of sedimentation of the juice and its acidity are determined refractometrically. The kinetics of anthocyanins extraction was determined in two ways, the solids content in the extract was calculated, and the reaction rate constants of the extraction process and the efficiency coefficient of ultrasonic amplification of the extraction process speed were calculated.

Studying dispersed and rheological properties of hydrocarbon-containing acid emulsions and their efficiency in removing asphalt-resin-paraffin deposits

2020 ◽  
pp. 128-139
Author(s):  
M. Yu. Shumakher ◽  
V. V. Konovalov ◽  
A. P. Melnikov
Keyword(s):  
Aqueous Solution ◽  
Hydrochloric Acid ◽  
Rheological Properties ◽  
Reaction Rate ◽  
Experimental Studies ◽  
Efficient Removal ◽  
Reservoir Properties ◽  
Hydrocarbon Solvents ◽  
Formation Zone ◽  
Effect Of The Composition

Currently, the treatment of the bottomhole formation zone with acidic compositions is one of the most common methods to intensify the oil inflow. The use of various modified acid compositions increases the efficiency of acid treatments on the bottomhole formation zone. Acid compositions, including those containing hydrocarbon solvents, which contribute to more efficient removal of organic colmatants, affect the reaction rate of the reagent with the rock and processing equipment, change the reservoir properties, etc.The article presents the results of experimental studies, which are aimed at establishing the effect of the composition of hydrocarbon-containing acidic emulsions consisting of an aqueous solution of hydrochloric acid, toluene and Neonol AF 9-10 on their dispersed and rheological properties, as well as their efficiency in removing paraffin deposits.

Sign in / Sign up

Export Citation Format

Share Document