Topic
Carbochemistry
About: Carbochemistry is a research topic. Over the lifetime, 1010 publications have been published within this topic receiving 16626 citations.
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01 Jan 1992
TL;DR: In this article, some of the aspects of the organic chemistry of coal at temperatures above 300°C were discussed, focusing mainly on reaction mechanisms, and not on details of specific coal conversion processes.
Abstract: This chapter discusses some of the aspects of the organic chemistry of coals at temperatures above 300°C. The intention is to provide an introduction to some of the concepts of organic reaction chemistry that may be important in the behavior of coals during high temperature processing in reductive (e.g. hydrogenation) or neutral (pyrolytic) environments. To maintain a focus on general aspects of the chemistry of coal, the discussion centers mainly on reaction mechanisms, and not on details of specific coal conversion processes.
2 citations
Patent•
22 Jul 2008TL;DR: In this article, a method for jointly gasifying a mixture of at least two different fuels having different degrees of coalification, including those of differing coal qualities such as brown coals and stone coals, is presented.
Abstract: A method for gasification of fuel in an entrained flow of a gasification reactor. The method includes jointly gasifying a mixture of at least two different fuels having different degrees of coalification, including those of differing coal qualities such as brown coals and stone coals. The method also includes pulverizing the coals forming the mixture in specific grain bands and drying the coals forming the mixture to a specific residual water content.
2 citations
01 Dec 2010
TL;DR: In this article, the run-of-mine (ROM) coal was crushed to 75 mm and detailed float and sink tests were carried out on the fraction 75-0.5mm basically to study the cleaning potentiates of the coal on washing.
Abstract: Coking coal is an essential prerequisite for production of Iron & Steel through blast furnace route. Systematic R&D studies on the availability of desired quality coking coal from indigenous resources have become imperative to minimize the dependence on imported coals. The Low Volatile Coking Coal (LVCC) constitutes about 50% of the total coking coal reserves in India. These coals are characterized by high ash content and difficult in cleaning potential. The present paper highlights the R&D investigations carried on a typical LVC coal of Bharat Coking Coal Limited. The run-of-mine (ROM) coal was crushed to 75 mm and detailed float and sink tests were carried out on the fraction 75–0.5mm basically to study the cleaning potentiates of the coal on washing. The coal fines were subjected to standard laboratory flotation tests to study the flotation behavior. Combined cleans was generated at 17.5% ash level and characterized for finding its utilization in metallurgical industries. The characterization studies revealed that the coal after suitable beneficiation may be used as a blendable coal for metallurgical purposes.
2 citations
TL;DR: In this article, an FeS phase diagram at temperatures relevant to coal gasification and with equilibrium sulfur potentials exhibited, for the most part, as hydrogen sulfide to hydrogen mole ratios were presented.
2 citations
01 Jul 2012
TL;DR: In this article, the effect of minerals on the gasification reactivity of coal has been studied by TGA using CO2 as a gasifying agent and surface properties such as, true density apparent density, porosity surface area of different gravity cut samples have also been measured to find out the impact of gravity separation on gasification reaction.
Abstract: Minerals in coals cause operational problems in various coal utilization technology as well as act as diluents towards its heat value. Indian coals contain higher percentage of mineral matter compared to foreign coal due to its formation through drift origin. Efficient utilization of high ash coal in environment friendly manner is the driving force for the development of clean coal technology. Coal gasification offers practical means meeting stringent environment controlled parameters for producing power, chemicals, liquid fuels and clean energy on a single platform. It is well accepted that gasification technology has sufficient potential for sustainable development of clean coal technology. Gasification reactivity depends on the coal properties and operational parameters as well as minerals present in coal. Minerals not only create operational problems but on the other side also catalyze the gasification and combustion reaction. Therefore to understand the effect of minerals on the gasification reactivity, present paper proposes to study the variation of gasification reactivity with various gravity cuts such as, 1.4-1.5;1.6-1.7; and 1.8-1.9 of a selected coal. Gasification reactivity has been studied by thermo gravimetric analyzer (TGA) using CO2 as gasifying agent. Surface properties such as, true density apparent density, porosity surface area of different gravity cut samples have also been measured to find out the effect of gravity separation on gasification reactivity.
2 citations