scholarly journals Influence of the Heating Rate on the Quality of Metallurgical Coke

ACS Omega ◽  
2021 ◽  
Author(s):  
María F. Vega ◽  
Elvira Díaz-Faes ◽  
Carmen Barriocanal
Keyword(s):  
Heating Rate ◽  
Metallurgical Coke

Influence of Freeze-Drying Modes on the Quality of Live Plague Vaccine

2019 ◽  
Vol 35 (4) ◽  
pp. 73-78
Author(s):  
S.E. Gostischeva ◽  
D.V. Rostovtseva ◽  
G.F. Ivanova ◽  
A.V. Kostrominov ◽  
M.V. Pilipenko
Keyword(s):  
Heating Rate ◽  
Freeze Drying ◽  
Eutectic Point ◽  
Freezing Temperature ◽  
Freezing Time ◽  
Residual Moisture ◽  
High Viability ◽  
Plague Vaccine ◽  
Selection Of

The optimization of the drying schedule has been carried out to improve the quality indicators of the live plague vaccine. Based on the data obtained on the eutectic point of the vaccine suspension, the freezing temperature and freezing time were set to -50 °С and 6-7 h, respectively. A pressure of 40 mTorr over the surface of the drying suspension and 20 mTorr during the desorption were shown to be the best conditions for sublimation. The drying tests with different options for the shelf heating rate, vacuum depth and duration of intermediate temperature indicators were carried out to develop the improved freeze-drying mode providing the selection of the most adapted bacteria. A vaccine lyophilized under the developed conditions has low residual moisture (up to 2%) and high viability index that persists over the whole shelf life. lyophilization, sublimation, eutectic, live plague vaccine, residual moisture, viability

Analysis of Bio-Oil Produced by Co-Pyrolysis of Mahua Seed and Polystyrene

2015 ◽  
Vol 787 ◽  
pp. 771-775
Author(s):  
Debalaxmi Pradhan ◽  
R.K. Singh
Keyword(s):  
Heating Rate ◽  
Fossil Fuel ◽  
Synergetic Effect ◽  
Blend Ratio ◽  
Yield And Quality ◽  
Bio Oil ◽  
Quality Of Products ◽  
Temperature Heating

TheProduction of biofuel from biomass sources is believed to reduce the reliance of fossil fuel and its cost. This investigation was aimed to produce and characterize the bio-oil obtained from co-pyrolysis. Two different feed stocks were used for co-pyrolysis; one is Mahua seed (MS) and the other one is Polystyrene (PS). The effect in addition of plastic to biomass in pyrolysis process were investigated on the yield and quality of products. Experiments were conducted in a semi-batch pyrolysis reactor under various parameters of temperature, heating rate and blending ratio. The results indicated that a temperature of 525 °C, and blend ratio of 1:1is maximumwith a heating rate of 20 °C/min. The yield of bio-oil obtained from the co-pyrolysis was found to be approximately 71%, which was higher about 22% than that of yield obtained from pyrolysis of Mahua seed (MS) alone. Further the bio-oil was characterized using different spectroscopic and chromatographic analyses. The analysis of the results for characterization of bio-oil indicated that the synergetic effect increased the bio-oil yield and its quality.

Elaboration of indices complex and additional criterion of coals and charges quality evaluation for production and prediction of required and high quality coke

2021 ◽  
Vol 77 (6) ◽  
pp. 651-664
Author(s):  
Yu. A. Zolotukhin ◽  
N. S. Andreichikov ◽  
A. Ya. Eremin ◽  
T. F. Kraskovskaya ◽  
V. V. Kuprygin
Keyword(s):  
Coke Quality ◽  
Metallurgical Coke ◽  
Quality Prediction ◽  
Material Base ◽  
Technological Properties ◽  
High Quality ◽  
Petrographic Composition ◽  
Wide Range ◽  
A Charge

Coal raw material base of coking is the main factor characterizing the quality of coke. Therefore, it is very important to know technological properties and peculiarities of coals behavior in a charge during coking process for coals charge batching and coke quality control. One of the priority directions in study coals and charges is petrographic and reflectogram analysis, which enable to obtain data related to evaluation genuine (one-valued) technological properties of coals, coal blends and charges at production of coke of required quality. Using a broad material of study, including the one carried out by the authors of the article, a wide range of application of reflectogram analysis of coals, coals blends and charges in the coking production was shown. It was demonstrated also that application of the analysis enabled to exclude the problem of “twins”, to define the degree of genetic coals recoverability and coals grades or types relation in the mixtures for the coking. Based on the elaborated by the authors reflectogram criteria of charges for coking, a strategy of coals batching was proposed, which ensures production of metallurgical coke of required and high quality and safe running of coke ovens. Based on wide experimental studies of plastic-tough properties of coal charges, porosity of coke, its X-ray structure characteristics, strength and reaction ability, theoretical ideas were formed about mechanism of interaction in a charge of petrographically nonuniform coals comprising it during coking process, by using the proposed by the authors indices of coals nonuniformity. The indices of coals, comprising the charge, nonuniformity, differ by metamorphism degree (σR) and petrographic composition (σСК), explaining regularities of forming of quality of coke from the charge with participation of petrographically nonuniform coals. The package of the factors noted by the authors, revealed in the process of the study of coals, coals blends and charges, as well as quality of coke obtained from them, enabled to elaborate a complex index of charges coking ability (К.п.к.Vo), which enables to considerably simplify the mathematical model of coke quality prediction and to increase its reliability. Mathematical models of coke quality prediction were verified and implemented at several plants of Russia.

Influence of heating rate on quality of needle coke in calcining

1983 ◽  
Vol 19 (9) ◽  
pp. 437-440
Author(s):  
M. M. Akhmetov ◽  
N. N. Karpinskaya ◽  
N. N. Shipkov
Keyword(s):  
Heating Rate ◽  
Needle Coke

scholarly journals Production and quality of blast furnace coke in Ukraine

2007 ◽  
Vol 1 (2) ◽  
pp. 91-96
Author(s):  
Yevgen Kovalov ◽  
Keyword(s):  
Coke Quality ◽  
Coke Production ◽  
Raw Material ◽  
Metallurgical Coke ◽  
Material Base ◽  
Preparation Methods ◽  
Blast Furnace Coke ◽  
Coal Charge ◽  
Furnace Coke

This research displays the state of metallurgical coke production in Ukrainew with special attention to the raw material base for production of coke and its quality. Besides the following essay deals with the detailed analysis of preparation methods of coal charge for coking, including thermal treatment and stamp charging and formulates the main ways of upgrading coke quality considering the rational technology of coking.

scholarly journals QUALITY OF Eucalyptus urograndis CHARCOAL PRODUCED IN THE SOUTHERN REGION OF TOCANTINS

FLORESTA ◽  
2019 ◽  
Vol 49 (4) ◽  
pp. 691
Author(s):  
Raquel Marchesan ◽  
Daniela Mendonça ◽  
Ana Carolina Caixeta Dias ◽  
Renata Carvalho da Silva ◽  
José Fernando Pereira ◽  
...  
Keyword(s):  
Heating Rate ◽  
Eucalyptus Grandis ◽  
Basic Density ◽  
Calorific Value ◽  
Fixed Carbon ◽  
Tree Plantation ◽  
Final Temperature ◽  
Good Energy ◽  
Eucalyptus Urograndis

The objective of this work was to determine the quality of the Eucalyptus urophilla x Eucalyptus grandis clone charcoal, defining the basic density and wood retractability, apparent density, breaking index, charcoal yield, condensable and non-condensable gas yield, AQI and calorific values, comparing the results of different trunk positions and in two different heating ramps, ramp 1 (R1) with a heating rate of 1.25 ºC/min, final temperature of 450ºC and total of 6 hours, and ramp 2 (R2) with a heating rate of 1.19 ºC/min, final temperature of 500ºC and total time of 7 hours. The six evaluated trees were from a six-year-old cloned tree plantation located in the municipality of Gurupi, in the south of Tocantins state. The specimens for the characterizations were made from wooden discs removed from three trunk positions (base, DBH, top). The Eucalyptus urograndis wood presented basic density considered average (0.47 g/cm³) and good dimensional stability. The charcoal presented an expected yield and high calorific value influenced by the final temperature of the heating ramps, high fixed carbon content, acceptable ash content, as well as a low breaking rate. The results were satisfactory and identified the species as a good energy source.

scholarly journals Reduction of Thermographic Phosphors Data to Heat Rates

2004 ◽  
Author(s):  
P. R. Crim ◽  
D. G. Walker ◽  
S. W. Allison ◽  
S. Goedeke
Keyword(s):  
Heat Flux ◽  
Heating Rate ◽  
Heat Fluxes ◽  
Single Shot ◽  
Temperature Dependent ◽  
Thermographic Phosphors ◽  
Free Parameters ◽  
A New Technique ◽  
Intensity Decay

Thermographic phosphors have emerged as a new technique for measuring heat fluxes, which relies on the temperature dependent intensity decay of thermographic phosphors. However, instead of reducing the intensity data to temperatures, heating rate is estimated. It has been shown that the heating rate can provide significantly better heat flux estimates than temperature measurements. Because the technique is new, little is known about the quality of heating rate estimates. Further, the heating rate estimation depends on the introduction of additional free parameters, which increases the uncertainty of the estimates. The analysis presented here indicates that sample rates must be one to two orders of magnitude greater than the frequency at which the heat flux must be known. Also, the sensitivity of the intensity to higher-order derivatives is small suggesting that derivatives beyond the heating rate are not accessible with single-shot data.

Assessing the quality of metallurgical coke by Raman spectroscopy

2014 ◽  
Vol 130 ◽  
pp. 1-7 ◽  
Author(s):  
Gerd Rantitsch ◽  
Anrin Bhattacharyya ◽  
Johannes Schenk ◽  
Nils Keno Lünsdorf
Keyword(s):  
Raman Spectroscopy ◽  
Metallurgical Coke

scholarly journals Effects of Selected Parameters on the Bonding Quality and Temperature Evolution Inside Plywood During Pressing

Polymers ◽  
2020 ◽  
Vol 12 (5) ◽  
pp. 1035 ◽  
Author(s):  
Pavlo Bekhta ◽  
Ján Sedliačik ◽  
Nataliya Bekhta
Keyword(s):  
Heating Rate ◽  
Phenol Formaldehyde ◽  
Temperature Evolution ◽  
Efficient Production ◽  
Pressing Pressure ◽  
Bonding Quality ◽  
Pressing Time ◽  
Temperature Time ◽  
Required Quality

This research optimizes the process of plywood production to determine its effectiveness in reducing energy and adhesive consumption for more efficient production with the required quality. The influence of selected parameters including veneer treatment (non-densified and densified), plywood structure, temperature, time and pressure of pressing, on the bonding quality and temperature evolution within the veneer stacks during hot pressing was investigated. Rotary-cut, non-densified and densified birch veneers and phenol formaldehyde (PF) adhesive were used to manufacture plywood samples. The effect of pressure and time of pressing on bonding quality of the plywood was determined. Bonding quality was evaluated by determining the shear strength of the plywood samples. The temperature evolution inside the veneer stacks was measured for birch veneers for different pressing temperatures and pressures for different numbers of veneer layers. The heating rate of the veneer stacks increased as the pressing temperature increased and decreased markedly with an increasing number of veneer layers. At a high pressing pressure, the heating rate of the densified veneer stacks was faster than that of non-densified veneers at the same pressure. The use of densified veneers for the production of plywood can lead to a shorter pressing time (17–50% reduction), lower glue consumption (33.3% reduction) and a lower pressing pressure (22.2% reduction) without negatively impacting the bonding strength of the plywood.

scholarly journals STUDI EKSPERIMENTAL GASIFIKASI UPDRAFT SEKAM PADI DAN BATUBARA KUALITAS RENDAH BERKATALIS BENTONIT UNTUK PRODUKSI SYNGAS

INFO-TEKNIK ◽  
2020 ◽  
Vol 20 (1) ◽  
pp. 81
Author(s):  
Akhmad Syarief ◽  
Maidi Maidi
Keyword(s):  
Heating Rate ◽  
Rice Husk ◽  
Gas Filtration ◽  
Filtration Process ◽  
Coal Quality ◽  
Gasification Process

This Research aims to determine the amounts generated in the gas liquefactiongas process rice husk with lowcoal quality at temperatures at 500 ° C and to know the speed of the updraft gasification process rice husk and the low coal quality of Bentonite catalyst. This research uses updraft type gasification where the gas that can be generated from the gasifer section will flow into the flowmeter and will be accommodated in the urine bag. In this study obtained syngas results on the process of updraft rice husk gasification and low quality coal berkatalis bentonit. Most Syngas produce on sample A SP 200 gr: BB 0 gr: B 100 gr equal to 36,72L. In sample B 180gr: 20gram: 100gr at 31,47L. In the sample C 140gr: 60gr: 100gr At 27.3L. and the lowest volume of syngas produced on the D sample 100gr: 100gr: 100gr at 24.28L. The heating rate that can be used in the gas filtration process and the low quality coal catalyzed bentonite is obtained at the highest heating rate in sample A 200gr: 0gr: 100gr at 16.89 ° C / min. In sample B 180gr: 20gr: 100gr at 15.25 ° C / min. In sample C 140gram: 60 grams: 100 grams of 13.13 ° C / min The lowest heating rate was obtained in D 100gr: 100gr: 100gr at 11.26 ° C / min.

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