Technical Market Support

Gasification Behaviour of Australian Coals

Technical Market Support » Future Technologies

Published: September 03Project Number: C9066

Get ReportAuthor: David Harris, Daniel Roberts, Daniel Henderson | CCSD, CSIRO Energy Technology

Entrained-flow gasification has been identified as the most efficient and environmentally-friendly technology for producing low cost electricity (together with other fuel and chemical options) from coal and other carbonaceous feedstocks. This project addresses coal and power industry needs to understand the suitability and performance of Australian bituminous coals for use in the leading new Integrated Gasification Combined Cycle (IGCC) power generation technologies based on entrained flow slagging gasifiers. These technologies will provide the basis for the transition to future coal based power systems capable of operating with near zero emissions.

The results discussed in this report comprise gasification conversion data for a commercially realistic suite of Australian coals under conditions that are relevant to entrained-flow gasification technologies. Gasification performance parameters such as conversion levels, gas quality indices, char structural parameters and gas compositions are measured as a function of coal type, reaction stoichiometry and residence times. These performance parameters are measured and analysed to further the understanding of high pressure gasification processes, as well as begin to identify criteria that will be used in test procedures which will be required to assess coals for use in entrained-flow gasification.

Optimum gasification performance (high conversion levels with maximum calorific value of syngas) is obtained in a specific range of oxygen:carbon ratios. For the coals tested in this report, this optimum stoichiometry was approximately 90-100% (of theoretical oxygen required for carbon conversion to CO). The effects of changing this ratio on coal conversion were similar for all coals, irrespective of their rank. Gasification efficiency (a measure of the conversion of the energy in the coal to energy in the gas) was best for coals with large volatile yields and/or high char reactivities. This observation, however, is also related to the amount of conversion achieved by these coals under these experimental conditions and thus is not solely an indication of the coal's effect on syngas quality. Planned tests at higher temperatures will achieve higher conversion levels of char and thus provide a more realistic indication of coal quality effects on syngas calorific values.

Volatile matter release strongly affected the levels of conversion achievable by a coal at 1100°C (the temperature used for most of the experiments used in this work). Even at these low temperatures, however, char reactivity plays an important role. Based on preliminary high-temperature experiments it is expected that as reaction temperatures are increased, the relative importance of char reactivity will increase. It is also likely that under true gasification conditions, the most significant coal properties affecting gasification conversion performance will be volatile yields and the interaction of char reactivity and char structure.

All fourteen coals in the CCSD Reference Coal Bank have been examined in this first major 'rangefinding' research project with the pressurised entrained-flow reactor (PEFR) facility. This work provides the first high temperature, high pressure coal conversion data for Australian black coals under gasification conditions. It begins to draw together existing bench-scale data (in particular on coal pyrolysis and char reactivity) to allow the development of test criteria for entrained flow gasification. Future work at higher temperatures, and with controlled environments of gasification reactants, will begin to deconvolute some of the important and complex reactions which is required for the development of reliable gasification conversion models applicable to Australian coals. It will also enable the development of procedures suitable for more routine application and for testing of coals for use in entrained flow gasification.


Health and safety, productivity and environment initiatives.

Recently Completed Projects

C28026Measuring The Height Of Fracturing Above Extracted Longwall Panels To Improve Reliability Of Groundwater Impact Predictions

Longwall mining is a mining method widely used in the Australian und...

C25059Development Of An Intrinsically Safe, Integrated Wireless Communications Network With A Distributed Array Of Geotechnical Sensors

For over 20 years, SCT Operations (SCT) have provided a range of ind...

C26051An On-Machine Bolting And Geotechnical Monitoring System

The primary objective of this project was to investigate how laser s...


Open Cut

Safety, productivity and the right to operate are priorities for open cut mine research.

Recently Completed Projects

C27046Estimation Of True Deformation Vector From Slope Radar Monitoring

Slope deformation radar monitors are now widely used in open cut coa...

C29003Wear Debris Removal From Dragline Commutators

The original aim of this project was to establish a method of removi...

C28037Local Scale Dispersion Modelling To Support ACARP Emission Factors

There remains significant concern in the industry regarding the accu...

Open Cut

Coal Preparation

Maximising throughput and yield while minimising costs and emissions.

Recently Completed Projects

C27032Coal Grain Analysis Applications Handbook

This Handbook sets out recommended practices for using coal grain an...

C26012Improved Flotation Recovery Via Controlling Froth Behaviour

There is no real-time measurement for coal flotation performance, ma...

C27012Towards Better Fine Coal Classification

It is well recognised that the efficient classification of fine coal...

Coal Preparation

Technical Market Support

Market acceptance and emphasising the advantages of Australian coals.

Recently Completed Projects

C26039Nanoporosity In Cokes: Their Origin, Control And Influence On CO2 Reactivity

This project using the outcomes of previous project C24060, examine...

C28063A Comprehensive Technical Review Of High-Efficiency Low-Emission (HELE) Pulverised Coal Combustion Technologies For Power Generation

Research and development has been undertaken worldwide to realise co...

C28064Carbon Structure Transformation During Coking Of Australian Coking Coals: Better Understanding The Coke Formation

Carbon structures of coke that are formed during the plastic layer a...

Technical Market Support

Mine Site Greenhouse Gas Mitigation

Mitigating greenhouse gas emissions from the production of coal.

Recently Completed Projects

C26004CFD Modelling Of Reverse Thermal Oxidisers For VAM Abatement - CFD Modelling Of Fixed-Bed RTO Devices

The project is part of a larger multi‐phase program of study a...

C27058Technological Assessment Of A Recycle Reactor For VAM Abatement

Underground coal mining emits high volumes of methane, diluted in ve...

C27008Selective Absorption Of Methane By Ionic Liquids

The connection of a ventilation air methane (VAM) abatement plant di...

Mine Site Greenhouse Gas Mitigation

Low Emission Coal Use

Step-change technologies aimed at reducing greenhouse gas emissions.

Recently Completed Projects

C17060BGasification Of Australian Coals

Four Australian coals were trialled in the Siemens 5 MWth pilot scale ga...

C17060AOxyfuel Technology For Carbon Capture And Storage Critical Clean Coal Technology - Interim Support

The status of oxy-fuel technology for first-generation plant is indicate...

C18007Review Of Underground Coal Gasification

This report consists of a broad review of underground coal gasification,...

Low Emission Coal Use

Mining And The Community

The relationship between mines and the local community.

Recently Completed Projects

C16027Assessing Housing And Labour Market Impacts Of Mining Developments In Bowen Basin Communities

The focus of this ACARP-funded project has been to identify a number...

C22029Understanding And Managing Cumulative Impacts Of Coal Mining And Other Land Uses In Regions With Diversified Economies

The coal industry operates in the context of competing land-uses that sh...

C23016Approval And Planning Assessment Of Black Coal Mines In NSW And Qld: A Review Of Economic Assessment Techniques

This reports on issues surrounding economic assessment and analysis ...

Mining And The Community


National Energy Research,Development & Demonstration Council (NERDDC) reports - pre 1992.

Recently Completed Projects

1609-C1609Self Heating of Spoil Piles from Open Cut Coal Mines

Self Heating of Spoil Piles from Open Cut Coal Mines

1301-C1301Stress Control Methods for Optimised Development...

Stress Control Methods for Optimised Development and Extraction Operations

0033-C1356Commissioned Report: Australian Thermal Coals...

Commissioned Report: Australian Thermal Coals - An Industry Handbook