JAWAHARLAL NEHRU TECHNOLOGICAL UNIVERSITY HYDERABAD

Pre-Requisites

NIL

Course Objectives

Understand coal formation, properties, and their evaluation along with various

issues of coal washing

Course Outcomes

Students can understand the fundamentals of Processes of formation of coal,

properties and evaluation and coal preparation and washability characteristics of coal

UNIT - I

Introduction: Processes of formation of coal, Theories of origin of coal, Eras of coal formation, Indian Coalfields and its subsidiaries: Occurrence and distribution, coal bearing formations, coal type and rank variation, Characteristics of major coalfields, Coal production from different sectors.

UNIT - II

Coal petrography: Macro and micro lithotypes, Composition of macerals, application of coal petrography, Mineral matter in coal: Origin and chemical composition, Impact of mineral matter in coal process industry.

UNIT - III

Coal properties and their evaluation: proximate and ultimate analysis, calorific value, crossing and ignition point temperature, plastic properties (free swelling index, Caking index, Gray King Low Temperature Assay, Roga index, plastometry, dilatometry).

UNIT - IV

Physical properties like specific gravity, hard groove grindability index, heat of wetting, crossing point temperature of coal, Behavior of coal at elevated temperatures and products of thermal decomposition, Classification of coal - International and Indian classification, grading of Indian coals.

UNIT - V

Coal Washing: Principles, objectives, coal preparation, Washability characteristics; Selection, testing, storage and utilization of coking and non-coking coal, Use of coal by different industries.

TEXT BOOKS:

• 1. S. Sarkar, Fuels and Combustion, Orient Longman Private Ltd., 2nd edition, 1990.
• 2. O. P. Gupta, Elements of Fuels, Furnaces and Refractories, Khanna Publication, 3rd Edition, 1996.

REFERENCE BOOKS:

• 1. M. A. Elliot, Chemistry of Coal Utilization, Wiley, 1981.
• 2. D. Chandra, R. M. Singh, and M. P. Singh, Text Book of Coal, Tara Book Agency, 2000.