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  1. Ujjwal Thakur

    How do I convert the concentration

    How do I convert the concentrations of given substances to volume fractions? NH3 : 64 mg/l Water: 136 g/m3 H2S: 6 g/m3 Thank you!
  2. Ujjwal Thakur

    Energy density in steam reforming process

    Will the energy density (LHV) of the product gas obtained after steam methane reforming increase? For example, if methane (LHV: 42 MJ/kg)is catalytically reformed with steam and oxygen in a fixed bed reactor, will the LHV of product gas be higher? or is it that the energy density will remain...
  3. Ujjwal Thakur

    Auto-thermal steam reforming

    Correct. It will lie within the limits and will partially oxidize, incomplete combustion generating heat (mildly exothermic). When this is coupled with highly endothermic tar cracking and steam reforming. The incomplete combustion must be so regulated just to reach upto 800-900°C, if I am not...
  4. Ujjwal Thakur

    Auto-thermal steam reforming

    Okay. Even if the feed air is below the sub-stoichoimetric level for partial oxidation?
  5. Ujjwal Thakur

    Auto-thermal steam reforming

    I am in doubt about the chance of explosion of mixture. What you said is absolutely correct. However, I have read researches about the catalytic partial oxidation where no burner is used. The problem here is I am using a spouted bed reactor( which is conical silo) the feed strea will enter the...
  6. Ujjwal Thakur

    Auto-thermal steam reforming

    Since the temperature would be 900°C and yes the mixture will be above above LFL as you said, it will autoignite above the catalyst bed. The reactor is run under vacuum condition, does this auto-ignition can cause explosion? Or if the oxygen is kept below the LOC, it would be safe. In the...
  7. Ujjwal Thakur

    Auto-thermal steam reforming

    Thank you. Since its a test in pilot scale I have no external heat, the temperature is achieved by applying air in the dolomite bed. Spouted bed reactors are type of fluidized bed reactor and conical bottom for spout. Providing air to syngas+steam mixture without igniting would be safe or not...
  8. Ujjwal Thakur

    Auto-thermal steam reforming

    Does that mean, I have to ignite the reactants? I am providing air as a oxygen source ( in desired amount) to partially oxidize it.
  9. Ujjwal Thakur

    Auto-thermal steam reforming

    Thank you for the response. Yes, I meant the spark ignition. Yes, I am using a dolomite catalyst for the tar conversion and syngas production. Since steam reforming is a endothermic process, I am also planning to partially oxidize the pygas to reach the desired temperature of 900°C. But I am...
  10. Ujjwal Thakur

    Auto-thermal steam reforming

    Hello Everyone!! I got a small question. So for the purpose of testing my experiment, I am building a small industrial scale reactor for steam reforming of pyrolysis gas in combination with partial oxidation with air. This test would be done in small scale with 25 m3/h of pygas, 30 m3/h of steam...
  11. Ujjwal Thakur

    Pyrolysis of aluminum waste

    Why pyrolysis of aluminium waste in a fluidized bed reactor with air generating so many boulders and crystallites in the outlet line? Is it because of aluminum oxide or Zinc/tin oxide formation. The inpout material has (99.99% aluminum) + plastic waste.
  12. Ujjwal Thakur

    clogging problem_burning pyrolysis gas

    Hi all, I have an question. For the process of pyrolysis, we are using a fluidized bed reactor with pyrolysis drum. The drum is with sieve, and is filled with sand. Sand is heated with air and natural gas burner. The pyrolysis obtained is burned at the top of the reactor and then the heat is...
  13. Ujjwal Thakur

    Reformimg of pyrolysis gas with steam and air

    Thank you very much for the kind response. I would take care of that. Yeah we are providing air at the reactor to provide autothermal heat for the steam reforming reactions. Yeah you are right for the certain H2/CO ratio as well. Thank you
  14. Ujjwal Thakur

    Reformimg of pyrolysis gas with steam and air

    Thank you very much for your response. I would like to know adding a premix fuel ( pyrolysis gas + air) seems little dangerous, what do you suggest?
  15. Ujjwal Thakur

    Reformimg of pyrolysis gas with steam and air

    Hello Everyone! I have a question related to reforming process. In a process to pre-reform pyrolysis gas (from plastic waste) with steam to obtain hydrogen rich synthesis gas (CO+H2). I am entering high temperature (500°C) pyrolysis gas( 3.5% methane and 7-8% other short chain geseous...

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