.. _sphx_glr_examples_surface_chemistry:

Surface chemistry
=================

The examples in this section demonstrate how *surface chemistry* can be included in a *Chemistry Set* and
applied to simulate chemical vapor deposition (CVD) and catalytic combustion processes in **PyChemkin**.



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    <div class="sphx-glr-thumbnails">

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    <div class="sphx-glr-thumbcontainer" tooltip="This example project presents a model for the CVD of silicon nitride (Si-N) in a steady-state PSR. The utilization of the simple PSR model is justified because the CVD process is operated under the &quot;kinetic limited&quot; condition and is running steadily. The CVD PSR is characterized by the volume, the substrate surface area, and the inlet precursor gas volumetric flow rate; consequently the reactor residence time remains constant even when the precursor stream composition or the reactor temperature is changed.">

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  .. image:: /examples/surface_chemistry/images/thumb/sphx_glr_SiC_cvd_thumb.png
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  :doc:`/examples/surface_chemistry/SiC_cvd`

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      <div class="sphx-glr-thumbnail-title">Simulating the chemical vapor deposition (CVD) process</div>
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    <div class="sphx-glr-thumbcontainer" tooltip="Catalytic combustion applications might utilize a two PFRs in series configuration for large fuel species. The first PFR is for pure gas-phase reactions called the pre-oxidizer, its main purpose is to partially break down the large hydrocarbon fuel species for the downstream catalytic combustor. The second PFR allows both gas-phase and surface reactions where the broken down fuel species are oxidized on the catalyst surface to generate heat.">

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  .. image:: /examples/surface_chemistry/images/thumb/sphx_glr_catalytic_combustion_thumb.png
    :alt:

  :doc:`/examples/surface_chemistry/catalytic_combustion`

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      <div class="sphx-glr-thumbnail-title">Simulating CH4 catalytic Combustion process</div>
    </div>


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    <div class="sphx-glr-thumbcontainer" tooltip="When there are multiple surface materials defined in the surface mechanism input file, all surface materials share the same gas phase (gas species and gas-phase reactions). Each surface material consists of its own surface phases, surface species, and surface reactions, and has independent global and local species orders/indices. Subsequently, you can access species and reaction properties one surface material at a time, and direct surface species interactions across different surface materials are not supported.">

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  .. image:: /examples/surface_chemistry/images/thumb/sphx_glr_multiple_materials_thumb.png
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  :doc:`/examples/surface_chemistry/multiple_materials`

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      <div class="sphx-glr-thumbnail-title">Processing a surface mechanism with multiple materials</div>
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    </div>


.. toctree::
   :hidden:

   /examples/surface_chemistry/SiC_cvd
   /examples/surface_chemistry/catalytic_combustion
   /examples/surface_chemistry/multiple_materials