FP6 BIGPOWER SSA PROJECT

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GASIFICATIONof WOODCHIPS AND HAZELNUT SHELLS IN
A DOWNDRAFT GASIFIERGüzide YINESOR

• FP6 BIGPOWER SSA PROJECT
• BIOGASTECH WORKSHOP
• 9-11th APRIL 2008 GEBZE TURKEY

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OBJECTIVES

• To design a new lab-scale downdraft fixed bed
  gasifier
• To examine operation of new lab-scale downdraft
  fixed bed gasifier
• To collect data from the experimental system
• To observe the effect of operation parameters (ER
  and fuel type (woodchips and hazelnut shells)) on
  gas composition and heating value

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• FIXED BED GASIFIERS

UPDRAFT
CROSSDRAFT
DOWNDRAFT
Open-core
Throat
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THROAT TYPE DOWNDRAFT GASIFIER

• ADVANTAGES
• Suitable for biomass gasification
• Low Tar Yield
• High Carbon Conversion
• Low Ash Carry Over
• Simple Construction and Operation
• DISADVANTAGES
• High Gas Exit Temperature
• Uniformly Sized Feed Stock
• Limited Moisture Content of Feed (H2Olt30)

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LABORATORY SCALE TEST FACILITY (at MRC ENERGY
INSTITUTE LABORATORY)
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TECHNICAL SPECIFICATIONS OF THE DOWNDRAFT
GASIFIER
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TECHNICAL SPECIFICATIONS OF THE GAS CLEANING
SYSTEM
Online gas analyzer
Gas-out
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CHARACTERISATION OF WOODCHIPS
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WOODCHIPS GASIFICATION TEST RESULTS TEMPERATURE
DISTRIBUTION IN THE GASIFIER
Woodchips at ER0.35
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WOODCHIPS GASIFICATION TEST RESULTS GAS
COMPONENTS
Woodchips ER0.35
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THE EFFECTS OF ER ON GAS COMPOSITION AND THE
HEATING VALUE OF GAS
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WOODCHIPS HAZELNUT SHELLS

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PRODUCER GAS CHARACTERISTICS
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WOODCHIPS HAZELNUT SHELLS
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THE FLAME OF THE DOWNDRAFT GASIFIER SYNGAS
Flame of syngas which is obtained for 30
minutes
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CONCLUSIONS

• A 10 kg capacity of laboratory scale fixed bed
  downdraft gasifier is designed and manufactured
  for different type of biomass fuels.
• A suitable gas cleaning system is chosen and
  implemented to the gasifier exit. A biggest
  portion of gas is directly send to the flare,
  rest of the gas is sent to the suitable gas
  cleaning system for gas analyzing.
• The composition of gas is analyzed by an online
  gas analyzer after the suitable gas cleaning
  system.
• During the tests period, approximately 1 hour
  continuous operation is obtained for 10 kg of
  biomass fuels.
• Gasifier works very well with woodchips and
  hazelnut shells
• No ash agglomeration is observed in the reactor
• Tests are done with any blockage in the throat
  region.
• Around 24 CO and 14 H2 is produced
  successfully, The lower heating value of the gas
  is calculated as 5,3 MJ/Nm3.
• The temperature of the throat is obtained above
  1000 oC as expected.