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PROTOTYPE FOR PRODUCING HYDROGEN
BY MEANS OF CLEAN WATER, AMMONIA AND RECYCLED ALUMINUM

LIFE11 ENV/ES/000593

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PROJECT

Objetives

The project's general objective is to design and construct a pilot plant to obtain hydrogen using A NEW PROCESS BASED ON THE REACTION BETWEEN ALUMINIUM AND AMMONIUM HYDROXIDE obtained from other industrial processes in order to optimize its efficiency for POWERING A FUEL CELL.

In order to achieve this objective, some specific work as the following has to be carried out:

  • Evaluating the requirements that the pilot plant would have to meet for hydrogen production to be viable from the technical point of view. Plan the trials necessary and also determining the analytical techniques for monitoring and validating them.
  • Studying the variables of the process with trials in the pilot plant in order to determine the critical variables that will influence the process so that they can be taken into account when designing the trials to be carried out.
  • Designing the prototype and putting it into operation.
  • Studying the final optimization of the design and operation of the prototype in order to determine the best operational parameters.
  • Evaluating the final results obtained by analysing all the information obtained. At the same time comparisons will be made between the various working options trialled and the conclusions will be written up.
  • Technically validating the process and disseminating the results. The results obtained will be disseminated as widely as possible, both at a national and international level, by publishing the results obtained in high impact journals and by participating in Congresses and Conferences attended by representatives of the most important industrial sectors.

Expected results

The basic objective of the project is to construct a pilot plant for producing hydrogen from waste ammonium hydroxide to establish:

  • Better conditions for mixing water / ammonium.
  • Optimize the characteristics / conditions for the aluminium filter work.
  • The regeneration of AFC (Alkaline Fuel Cells) with the gas supply produced in the aluminium filter. In order to achieve the following results/output:
  • 0% Production of greenhouse gases.
  • Efficiency of NH3 recovery > 80%
  • Energy efficiency of the hydrogen generation process: 100%
  • Estimated efficiency of the global energy generation process > 80%
  • Hydrogen production rate 1.6 g H2/sec.
  • Potency of fuel cell: 80 kW

Conclusions Achieved

  • OPTIMUM PILOT: T = 45° C; pH = 13.5; Agitation: 45Hz
  • Decrease of temperature: lower energy costs in heating, treatment and loss of NH3
  • pH = 13.5: NaOH as a catalyst: Compensates losses of NH3, can work to lower T° and decreases treatments debug
  • Particle size: [2-10] mm minimize clogging and impact by grinding
  • The pilot plant has been used to determine the kinetics of the process and solve future problems on an industrial scale

Current lines of work

  • Improve performance and reduce production losses H2 NH3
  • Reduce the cost of reagents and simplify the process: reduce or eliminate NH3, make products, reduce H2SO4 and cooling gas
  • Conditioning of Al (OH) 3 for sale
  • Extrapolation of manufacturing costs to industrial plants and economic evaluation of the investment required for the same

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