Please use this identifier to cite or link to this item: http://ea.donntu.edu.ua:8080/jspui/handle/123456789/18480
Title: ЭКСТРАКТЫ ЖИДКОПОДВИЖНЫХ ПРОДУКТОВ, ПОЛУЧЕННЫХ ИЗ РАЗНОВОССТАНОВЛЕННЫХ УГЛЕЙ И ШИХТ НА ИХ ОСНОВЕ
Other Titles: EXTRACTS OF PLASTIC LAYER DERIVED FROM COALS OF DIFFERENT REDUCTIVITY AND BLENDS BASED ON THEM
Authors: Бутузова, Людмила Федоровна
Маковский, Руслан Васильевич
Маринов, Стефан
Бутузов, Геннадий Николаевич
Keywords: экстракты
спекание
пластический слой
уголь
шихты
caking ability
Plastic layer
Coal
Blend
extracts
Issue Date: 2013
Publisher: Донецк, ДонНТУ
Series/Report no.: Наукові праці ДонНТУ;Серія: Хімія і хімічна технологія, 2013. - Вип.2(21). - С.189-198
Abstract: Впервые подробно изучены экстракты пластического слоя жирных и газовых углей разных генетических типов по восстановленности (ГТВ) и шихт на их основе. Показано, что спекаемость углей предполагает наличие в пластическом состоянии определенной сбалансированности между подвижной и макромолекулярной фазами. Предложен новый показатель спекаемости - соотношение карбены+карбоиды/мальтены в экстрактах жидкоподвижных продуктов термофильтрации углей и шихт, которое коррелирует с выходом указанных продуктов, ответственных за процессы спекания. Выявлен оптимальный состав шихты (Га+Жв), который дает максимально высокий выход «пластического» слоя, насыщенного алифатическими компонентами.
Description: This paper presents the results of the first detailed study of extracts from the plastic layer of coals of different genetic types by reductivity (GTR) and their blends. Two pairs of the isometamorphic Denets coals formed under reductive (RC) and less reductive conditions (LRC) and different by their sulphur content accordingly were used as objects of research. It was coals of G and J-Grade (≈83–88% Cdaf) according to Ukrainian classification. The proximate, ultimate analysis of samples, including total sulfur (St) were determined by using standard methods (GOST 9414.3-93, 12113-94, 27314-91, 11022-95, 8606-93). The statistical analysis was performed using the Microsoft Excel and Origin 6.1 software package. Coals under investigations and blends on the basis of these coals were thermally treated up to 600°C using the method of centrifugal thermal filtration. This method enables one to separate primary products that form the plastic mass, immediately, thus preventing their secondary transformations. The amount and composition of fluid non-volatile products (FNP) largely determine the processes of caking and coking. Analysis of FNP of termal filtration was carried out by different protocols of extraction, adsorption chromatography, DRIFT- spectroscopy. The main part of the extracts of the investigated samples is composed of carbenes+carboids (24-91%) and maltenes. Quantity of carbenes+carboids increases during coalification processes and is much higher for blends, contained of middle-rank coal of reduced type. Obviously, their segregation at the early stages of thermal decomposition is very important for the formation of plastic layer and subsequent formation of the coke structure. DRIFT-spectroscopy analysis of the extracts revealed significant quantitative differences in the composition of components extracted from different coals and blends. The extracts obtained from J-Grade coals are characterized by a higher content of carbenes+carboids in comparison with G-Grade coals, which corresponds to their higher caking ability. It has been shown that the caking ability of coals requires some balance between the mobile and macromolecular phases in a plastic state. A new indicator of caking - the ratio of carbenes+carboids/maltenes in extracts of liquid products of coals and blends thermal filtration has been suggested. This indicator correlates with yield of plastic layer which are responsible for the caking process. The optimal composition of the blend, which gives the highest yield of "plastic" layer, saturated with aliphatic components has been cleared.
URI: http://ea.donntu.edu.ua/handle/123456789/18480
ISSN: 2074-6652
Appears in Collections:Випуск 2(21)

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