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

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.

scholarly journals On the Spectral Quality of Time-Resolved CMOS SPAD-Based Raman Spectroscopy With High Fluorescence Backgrounds

2020 ◽  
Vol 20 (9) ◽  
pp. 4635-4645
Author(s):  
Jere Kekkonen ◽  
Tuomo Talala ◽  
Jan Nissinen ◽  
Ilkka Nissinen
Keyword(s):  
Raman Spectroscopy ◽  
Spectral Quality ◽  
Time Resolved ◽  
High Fluorescence

scholarly journals Microstructural evolution of metallurgical coke: Evidence from Raman spectroscopy

2020 ◽  
Vol 227 ◽  
pp. 103546
Author(s):  
Gerd Rantitsch ◽  
Anrin Bhattacharyya ◽  
Ahmet Günbati ◽  
Marc-Andre Schulten ◽  
Johannes Schenk ◽  
...  
Keyword(s):  
Raman Spectroscopy ◽  
Microstructural Evolution ◽  
Metallurgical Coke

Potential of Near-Infrared Fourier Transform Raman Spectroscopy in Food Analysis

1992 ◽  
Vol 46 (10) ◽  
pp. 1503-1507 ◽  
Author(s):  
Y. Ozaki ◽  
R. Cho ◽  
K. Ikegaya ◽  
S. Muraishi ◽  
K. Kawauchi
Keyword(s):  
Raman Spectroscopy ◽  
Fourier Transform ◽  
Fatty Acid ◽  
Raman Spectra ◽  
Food Analysis ◽  
Near Infrared ◽  
Egg White ◽  
Ft Raman Spectroscopy ◽  
Ft Raman

The 1064-nm excited Fourier transform (FT) Raman spectra have been measured in situ for various foods in order to investigate the potential of near-infrared (NIR) FT-Raman spectroscopy in food analysis. It is demonstrated here that NIR FT-Raman spectroscopy is a very powerful technique for (1) detecting selectively the trace components in foodstuffs, (2) estimating the degree of unsaturation of fatty acids included in foods, (3) investigating the structure of food components, and (4) monitoring changes in the quality of foods. Carotenoids included in foods give two intense bands near 1530 and 1160 cm−1 via the pre-resonance Raman effect in the NIR FT-Raman spectra, and therefore, the NIR FT-Raman technique can be employed to detect them nondestructively. Foods consisting largely of lipids such as oils, tallow, and butter show bands near 1658 and 1443 cm−1 due to C=C stretching modes of cis unsaturated fatty acid parts and CH2 scissoring modes of saturated fatty acid parts, respectively. It has been found that there is a linear correlation for various kinds of lipid-containing foods between the iodine value (number) and the intensity ratio of two bands at 1658 and 1443 cm−1 ( I1658/ I1443), indicating that the ratio can be used as a practical indicator for estimating the unsaturation level of a wide range of lipid-containing foods. A comparison of the Raman spectra of raw and boiled egg white shows that the amide I band shifts from 1666 to 1677 cm−1 and the intensity of the amide III band at 1275 cm−1 decreases upon boiling. These observations indicate that most α-helix structure changes into unordered structure in the proteins constituting egg white upon boiling. The NIR FT-Raman spectrum of old-leaf (about one year old) Japanese tea has been compared with that of its new leaf. The intensity ratio of two bands at 1529 and 1446 cm−1 ( I1529/ I1446), assignable to carotenoid and proteins, respectively, is considerably smaller in the former than in the latter, indicating that the ratio is useful for monitoring the changes in the quality of Japanese tea.

Raman studies of reactive DC-magnetron sputtered thin films of YBaCuO on MgO

1989 ◽  
Vol 4 (6) ◽  
pp. 1312-1319 ◽  
Author(s):  
K. C. Sheng ◽  
S. J. Lee ◽  
Y. H. Shen ◽  
X. K. Wang ◽  
E. D. Rippert ◽  
...  
Keyword(s):  
Thin Films ◽  
Raman Spectroscopy ◽  
Critical Temperature ◽  
Impurity Content ◽  
Superconducting Films ◽  
Annealing Process ◽  
Rapid Thermal Annealing Process ◽  
Zero Resistance ◽  
Thermal Annealing Process

Raman spectroscopy was employed to study Y–Ba–Cu–O films prepared by multilayer, reactive sputtering from separate Y, Cu, and Ba0.5Cu0.5 targets. A set of films having the composition YxBa2CuyOz with 0.7 < x < 1.8 and 2.8 < y < 3.5 and critical temperature with zero resistance, Tc(R = 0), ranging from 25 to 90 K was studied with the Raman technique. The correlation between Raman data and critical temperature, Tc, was investigated. This technique provides important information concerning the film crystallinity, homogencity, and impurity content (including other phases) which is useful in judging the quality of high Tc superconducting films. We also found that the rapid thermal annealing process is a very efficient way to reduce chemical reactions between the film and the substrate.

scholarly journals Quality of graphene on sapphire: long-range order from helium diffraction versus lattice defects from Raman spectroscopy

RSC Advances ◽  
2016 ◽  
Vol 6 (25) ◽  
pp. 21235-21245 ◽  
Author(s):  
Gloria Anemone ◽  
Esteban Climent-Pascual ◽  
Hak Ki Yu ◽  
Amjad Al Taleb ◽  
Felix Jiménez-Villacorta ◽  
...  
Keyword(s):  
Raman Spectroscopy ◽  
Long Range ◽  
Range Order ◽  
Lattice Defects ◽  
New Method ◽  
Long Range Order ◽  
High Quality

We report a new method to produce high-quality, transparent graphene/sapphire samples, using Cu as a catalyst.

scholarly journals Raman spectroscopic analysis of an important Visigothic historiated manuscript

2016 ◽  
Vol 374 (2082) ◽  
pp. 20160041 ◽  
Author(s):  
Elizabeth A. Carter ◽  
Fernando Rull Perez ◽  
Jesús Medina Garcia ◽  
Howell G. M. Edwards
Keyword(s):  
Raman Spectroscopy ◽  
Spectroscopic Analysis ◽  
Santo Domingo ◽  
Santa Cruz ◽  
Organic Pigments ◽  
Raman Spectroscopic ◽  
Complete Work ◽  
Iron Gall ◽  
Raman Spectroscopic Analysis

Raman spectroscopy has been used to study fragments of early Visigothic historiated manuscripts from the important mediaeval library at Santo Domingo de Silos which were a part of a Beato dating from the tenth to the mid-eleventh centuries. These fragments are from some of the oldest manuscripts in the scriptorium of the monastery. In this study, a comparison is made between the pigments and inks used on these manuscripts and those used in a previous study of the unique Visigothic Beato de Valcavado in Santa Cruz, Valladolid, completed in the year 970, which is noted for its quality of execution as well as its content and is remarkable eschatologically in being identifiable as the complete work of only a single scribe. For comparative purposes, the pigments and inks used in the Silos Monastery Beato and a series of historiated early manuscripts from mediaeval times through to the Renaissance also held in the monastic library were analysed. Raman spectroscopy identified a range of mineral and organic pigments such as cinnabar, orpiment, minium, azurite and indigo. In addition, a number of admixtures were found, for example, indigo and orpiment to produce vergaut (green) and a mixture of cinnabar with iron-gall ink and cerussite to produce darker and lighter shades of red. Some interesting conclusions were drawn about the use of iron-gall and carbon-based inks. This article is part of the themed issue ‘Raman spectroscopy in art and archaeology’.

Changes in the Chemical Quality of Bone Grafts During Clinical Preparation Detected by Raman Spectroscopy

2016 ◽  
Vol 14 (4) ◽  
pp. 319-323 ◽  
Author(s):  
Alexander Wurm ◽  
Ruth Steiger ◽  
Christoph G. Ammann ◽  
David Putzer ◽  
Michael C. Liebensteiner ◽  
...  
Keyword(s):  
Raman Spectroscopy ◽  
Bone Grafts ◽  
Chemical Quality ◽  
Clinical Preparation

Dispersive Raman Spectroscopy for the Nondestructive and Rapid Assessment of the Quality of Southern Italian Honey Types

2016 ◽  
Vol 34 (19) ◽  
pp. 4479-4485 ◽  
Author(s):  
Anna Grazia Mignani ◽  
Leonardo Ciaccheri ◽  
Andrea Azelio Mencaglia ◽  
Rosa Di Sanzo ◽  
Sonia Carabetta ◽  
...  
Keyword(s):  
Raman Spectroscopy ◽  
Rapid Assessment

scholarly journals Spectral pre and post processing for infrared and Raman spectroscopy of biological tissues and cells

2016 ◽  
Vol 45 (7) ◽  
pp. 1865-1878 ◽  
Author(s):  
Hugh J. Byrne ◽  
Peter Knief ◽  
Mark E. Keating ◽  
Franck Bonnier
Keyword(s):  
Raman Spectroscopy ◽  
Spectral Data ◽  
Biomedical Applications ◽  
Biological Tissues ◽  
Spectral Quality ◽  
Post Processing ◽  
Factors Influencing ◽  
Infrared And Raman Spectroscopy ◽  
Processing Steps

This review presents the current understanding of the factors influencing the quality of spectra recorded and the pre-processing steps commonly employed to improve on spectral quality, as well as some of the most common techniques for classification and analysis of the spectral data for biomedical applications.

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