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Gasification good ideas

History of my PhD: how projects born and die and good ideas survive

Giulio Allesina

on 21 March 2013

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Transcript of Gasification good ideas

A Scientific Approach Gasification? Ing. Giulio Allesina The 15 seconds contradiction Experimental and analytical investigation
of downdraft stratified gasifiers Why gasification? Outline Introduction 1st Experimental
campaign Micro Stratos 1 2 3 Experimental

Modeling Biomass
prediction CO 2 C + O2 = CO2 + 393kJ/mol
C + 1/2O2 = CO + 123.1kJ/mol C + H2O = CO + H2 -􀀀 118.5 kJ/mol
C + CO2 = 2CO 􀀀 - 159.9kJ/mol CO2 + H2 = CO + H2O - 40.9kJ/mol C + 2H2 = CH4 + 87.5kJ/mol Ongoing
Researches Influence of diameter Calorimetric Analysis
of gasification efficiency Calorimetric gas analysis Gas Cleaning Engines power output & Biomass consumption ---> System control unit
Biomass moisture content ---> PCE MB 200 moisture meter
Temperatures ----> 6 N-type TC
Gas flow ----> Pitot Tube
Air flow ----> Differential manometer + air inlet calibration Model A B 1st Experimental Campaign & Model 2nd Experimental Campaign & Model Thermal stratigraphy and superficial temperature 4 seconds loading 15 seconds loading Wang + Reed Model Results Wang’s Dynamic Model Wang’s Dynamic Model 3. Methanogenesis 4. Steam reforming

C + 2 H2 --> → CH4 CH4 + H2O --> →CO + 3 H2 Wang’s Dynamic Model Reed’s Model 1. Boudouard reaction 2. Water-gas reaction
C + CO2 →-> 2 CO C + H2O -> →CO + H2 Wang’s Dynamic Model Model 2 Elemental analysis +
Moisture meter 1: biomass gasification 2.a Langmuir - Hinshelwood
reactions model 2.b Langmuir - Rideal
reactions model 3. equations system Wang + Reed Models 4 seconds loading Channeling model Ongoing researches Integrated projects ER Wang+ Reed
low ER model Wang+ Reed
high ER model A1 A2 Pirometer Lab scale stratified reactor Diameter in modeling Lab scale stratified reactor Calorimetric approach: Lab scale stratified reactor 'Old but gold' Tar sampling @ U.B.C. G.E.K. 'Stratos' On-field biodiesel production Conclusion 1 Modeling:

- Three different models for stratified reactors were tested.

- For large reactors a specific model were developed and validated

- Integrated models for biodiesel production were proposed


- Stratified reactors from lab scale to medium scale were investigated

- An innovative method for efficiency evaluation was proposed, with possibility to be used for gas analysis

- A micro scale gasifier was designed and built, now it is used for feasibility studies Technology review:

- Stratified reactors can process many biomass types non- homogeneous fuels with some limitations in moisture content

- These reactors are simple. The manufacture is easy, making the stratified reactors suitable for application in underdeveloped countries

- Instabilities in gas quality and presence of slagging need to be taken into account during the power plant design

- Large gasifiers are affected by channeling issues. Conclusion 2 2nd Experimental
campaign Inception
model On field biodiesel
production Tar sampling Tutor: Ch.mo professor Paolo Tartarini
Co-tutor: Dr. Ing. Alberto Muscio Biochar C H O + 1.03 O2 = 0.72 H2O + CO2 (+20MJ/kg) 1.44 0.66 Inception Ongoing
Researches Thermal stratigraphy and superficial temperature
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