# Análisis 54: Disociación química, formación NOx (11 reacciones): Modelo de equilibrio químico.

{% hint style="info" %}
Obtener las fracciones másicas de los productos de combustión del conjunto de reacciones de disociación siguiente:

* Reacción 1: 0.5 N<sub>2</sub> + 0.5 O<sub>2</sub> <--> NO
* Reacción 2: NO + 0.5 N<sub>2</sub> <--> N<sub>2</sub>O
* Reacción 3: 0.5 N<sub>2</sub> + O<sub>2</sub> <--> NO<sub>2</sub>
* Reacción 4: 2 NO<sub>2</sub> <--> N<sub>2</sub>O<sub>4</sub>
* Reacción 5: CO<sub>2</sub> <--> CO + 0.5 O<sub>2</sub>
* Reacción 6: H<sub>2</sub>O <--> H<sub>2</sub> + 0.5 O<sub>2</sub>
* Reacción 7: H<sub>2</sub>O <--> 0.5 H2 + OH
* Reacción 8: SO<sub>2</sub> + 0.5 O<sub>2</sub> <--> SO<sub>3</sub>
* Reacción 9: 0.5 O<sub>2</sub> <--> O
* Reacción 10: 0.5 H<sub>2</sub> <--> H
* Reacción 11: 0.5 N<sub>2</sub> <--> N

Para la combustión de una mezcla volumétrica del 70 % de CH<sub>4</sub>(g) y 30% de H<sub>2</sub>S(g) con un 200 % de aire estequiométrico, saliendo los productos de combustión a la temperatura de 1700 ºC.
{% endhint %}

Este caso ha sido resuelto previamente mediante el software EES:

* K1=0.01843708
* K2=4.84709
* K3=0.0000888
* K4=0.000000000932243
* K5=0.00101717
* K6=0.00023014
* K7=0.00012431
* K8=0.00810362
* K9=0.00052803
* K10=0.00132332
* K11=0.000000000585138
* P=100 "kPa"
* Po=100 "kPa"

**"Methane"**

* FM1=0.7
* Alfa0=1
* Beta0=4
* Alfa=FM1\*Alfa0
* Beta=FM1\*Beta0+FM2\*2

**"H2S"**

* FM2=1-FM1
* Gamma=FM2
* O2\_est=Alfa+Beta/4+Gamma
* lambda=2.0
* Air=O2\_est\*lambda

**"Mass balance"**

* N=NCO2 + NH2O + NO2 + NN2 + NNO + NN2O+ NNO2 + NN2O4 + NOH + NH2 + NSO2+ NSO3 + NO + NH+ NN

**"Mass balance C"**

* NCO2+NCO=Alfa

**"Mass balance H2O"**

* 2\*NH2O+2\*NH2+NH=Beta
* "2\*NH2O+2\*NH2=Beta"

**"Mass balance N2"**

* 2\*NN2+NNO + 2\*NN2O +NNO2 + 2\*NN2O4 +NN=3.76\*Air\*2

**"Mass balance O2"**

* 2\*Air=2\*NCO2+NCO+NH2O+NN2O + NNO + 2\*NO2 +4\*NN2O4 + 2\*NNO2 + NOH + 2\*NSO2+ 3\*NSO3 +NO

**"Mass balance S"**

* Gamma= NSO2+ NSO3
* YNO=NNO/N
* PNO=YNO\*P/Po
* YO2=NO2/N
* PO2=YO2\*P/Po
* YN2O=NN2O/N
* PN2O=YN2O\*P/Po
* YN2=NN2/N
* PN2=YN2\*P/Po
* K1=PNO/(PO2^0.5\*PN2^0.5)
* K2=PN2O/(PN2^0.5\*PNO)
* YNO2=NNO2/N
* PNO2=YNO2\*P/Po
* K3=PNO2/(PO2\*PN2^0.5)
* YN2O4=NN2O4/N
* PN2O4=YN2O4\*P/Po
* K4=PN2O4/(PNO2^2)
* YCO=NCO/N
* PCO=YCO\*P/Po
* YCO2=NCO2/N
* PCO2=YCO2\*P/Po
* K5=PCO\*PO2^0.5/PCO2
* YH2O=NH2O/N
* PH2O=YH2O\*P/Po
* YH2=NH2/N
* PH2=YH2\*P/Po
* K6=PH2\*PO2^0.5/PH2O
* YOH=NOH/N
* POH=YOH\*P/Po
* K7=POH\*PH2^0.5/PH2O
* YSO2=NSO2/N
* PSO2=YSO2\*P/Po
* YSO3=NSO3/N
* PSO3=YSO3\*P/Po
* K8=PSO3/(PSO2\*PO2^0.5)
* YO=NO/N
* POo=YO\*P/Po
* K9=(POo)/PO2^0.5
* YH=NH/N
* PH=YH\*P/Po
* K10=PH/PH2^0.5
* YN=NN/N
* PN=YN\*P/Po
* K11=PN/PN2^0.5

![](https://thermosuite.com/manual/54/media/image2.png)

![](https://thermosuite.com/manual/54/media/image3.png)

![](https://thermosuite.com/manual/54/media/image4.png)

![](https://thermosuite.com/manual/54/media/image5.png)

![](https://thermosuite.com/manual/54/media/image6.png)

![](https://thermosuite.com/manual/54/media/image7.png)

![](https://thermosuite.com/manual/54/media/image8.png)

![](https://thermosuite.com/manual/54/media/image9.png)

![](https://thermosuite.com/manual/54/media/image10.png)

![](https://thermosuite.com/manual/54/media/image11.png)

![](https://thermosuite.com/manual/54/media/image12.png)

![](https://thermosuite.com/manual/54/media/image13.png)

![](https://thermosuite.com/manual/54/media/image14.png)

![](https://thermosuite.com/manual/54/media/image15.png)

Este caso con THERMOCombustion:

<figure><img src="/files/UmXkEkrS7diKC50QRbj8" alt=""><figcaption></figcaption></figure>

<figure><img src="/files/y5fwIKIyPuRIcVoDMXSH" alt=""><figcaption></figcaption></figure>

![](https://thermosuite.com/manual/54/media/image19.png)

![](https://thermosuite.com/manual/54/media/image20.png)

![](https://thermosuite.com/manual/54/media/image21.png)

![](https://thermosuite.com/manual/54/media/image22.png)

![](https://thermosuite.com/manual/54/media/image23.png)

![](https://thermosuite.com/manual/54/media/image24.png)

![](https://thermosuite.com/manual/54/media/image25.png)

![](https://thermosuite.com/manual/54/media/image26.png)

![](https://thermosuite.com/manual/54/media/image27.png)

![](https://thermosuite.com/manual/54/media/image28.png)


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