Martin Gräbner
English | 2014 | ISBN: 3527336907 | ISBN-13: 9783527336906 | 384 pages | PDF | 10,5 MB

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Description
Coal gasification is the process for production of syngas, a mixture of hydrogen, carbon monoxide and dioxide, from coal and water. It is a clasical example for the interaction of basic chemistry, chemical engineering, ecological and economic aspects. This monograph provides the reader with the neccessary basic scientific background and displays with industry-proven examples efficiency, but also boundaries of models.Special emphases are a comprehensive overview on latest technology developments, and the introduction of an innovative, new order scheme for evaluation of the gasification process at one glance - the ternary diagram. As the use of poor, ash-rich coal gained substantial interest within the last years, a systematic thermoynamic and exergetic comparison between a baseline coal and a coal of elevated ash content is another key part of the book.
Table of Contents
Preface
INTRODUCTION

COAL GASIFICATION IN A GLOBAL CONTEXT
Applications of Coal Gasification
The Three Generations of Coal Gasifiers
Typical Feedstock and Products
Main Markets for Coal Gasification
Challenges and Opportunities for Coal Gasification
Environmental Aspects

COAL CHARACTERIZATION FOR GASIFICATION
Coal as Gasification Feedstock
Petrographic Coal Analysis
Coal Classification
Coal Sampling
Proximate Analysis
Fischer Assay
Ultimate Analysis
Heating Values
Caking Properties
Reactivity
Mineral Matter and Ash Analysis
Relevant Physical Properties

FUNDAMENTALS
Terms and Definitions
Gasification Reactions
Pyrolysis Reactions
Gasification Parameters
Classifying Gasification Methods

COAL GASIFICATION MODELING
Introduction
Balancing of Gasification Systems
Thermodynamic Modeling
Kinetic Modeling
CFD Modeling of Coal Gasifiers
Generic Models for Case Studies

COAL GASIFICATION TECHNOLOGY SURVEY
Entrained-Flow Gasifiers
Fluid-Bed Gasifiers
Moving-Bed Gasifiers

THERMODYNAMIC PROCESS ASSESSMENT
Introduction of a Ternary Gasification Diagram
Diagrams for Pittsburgh#8 Coal
Diagrams for South African Coal
Technology Potential Analysis
Influence of the Ash Content
Other Gasification Systems
Conclusions

EXERGETIC PROCESS ASSESMENT
Exergy Calculations
Exergetic Analysis
Conclusions of Process Assessment

CONCEPT STUDY: THE INTERNAL CIRCULATION (INCI) GASIFIER
Introduction
Basic Principle
Detailed Process Description
Thermodynamic Modeling of the INCI Gasifier
Next Development Steps

TRENDS FOR GASIFICATION DEVELOPMENT