---
title: Waste Gas
slug: waste-gas
docTags: 
createdAt: 2025-02-14T22:36:02.583Z
---

:::hint{type="info"}
If you produce [pig iron](docId\:A4fOrqBn_T6qpIN4-l5Mo) and/or [crude steel](docId\:A4fOrqBn_T6qpIN4-l5Mo), you must attribute emissions from the generated waste gas. These emissions contribute to the direct emissions. 

Click [here](docId\:D2ZsuoqnHQioQFUE5YQPU) to learn more about the CBAM rules for waste gases.
:::

:::::WorkflowBlock
:::WorkflowBlockItem
Right-click on the screen and select** CBAM > Production Process**

![](https://api.archbee.com/api/optimize/x8OHL8j_3t12U2ealHN0O/Zy2wYAJyev1LZ4oiwsNPK_image.png)
:::

:::WorkflowBlockItem
Select any good under the aggregated goods categories of **Pig Iron **or **Crude Steel**

![](https://api.archbee.com/api/optimize/x8OHL8j_3t12U2ealHN0O/jJjJX5TVIqQtYWzQ7NS45_image.png)
:::

:::WorkflowBlockItem
Select the **Measurement Unit**

![](https://api.archbee.com/api/optimize/x8OHL8j_3t12U2ealHN0O/04eiTHC26VRA9QBzqPY7K_image.png)
:::

:::WorkflowBlockItem
Indicate the amount of waste gas generated in the specified unit

![](https://api.archbee.com/api/optimize/x8OHL8j_3t12U2ealHN0O/urVgUG4BFpvMj-kUqlxVE_image.png)
:::

::::WorkflowBlockItem
Input the **Waste Gas Emission Factor**

:::hint{type="info"}
According to [equation 54](docId\:nMVRCWOq2rBDvKRVifvn_), input the standard emission factor of natural gas **56,1 tCO2/TJ**.
:::

![](https://api.archbee.com/api/optimize/x8OHL8j_3t12U2ealHN0O/yac4XDcFqfrhRgzKvnn4A_image.png)
::::

:::WorkflowBlockItem
Click **Next**

![](https://api.archbee.com/api/optimize/x8OHL8j_3t12U2ealHN0O/Xcp4_xrozvhrqyWuEgeQg_image.png)
:::

:::WorkflowBlockItem
Click on the black dot at the edge of the **Production Process** and drag the line to connect it to one of the black dots on the **Self Electricity **and/or **Production Process**

![](https://api.archbee.com/api/optimize/x8OHL8j_3t12U2ealHN0O/sgbzIz-m68KYOqxkp3gip_image.png)
:::

:::WorkflowBlockItem
Select **Waste Gas** as the type of output

![](https://api.archbee.com/api/optimize/x8OHL8j_3t12U2ealHN0O/0Hhm9gJeEShFqyvyWXyEn_image.png)
:::

:::WorkflowBlockItem
Enter the **Quantity **of **Waste Gas** you want to send to the **Self Electricity** unit

![](https://api.archbee.com/api/optimize/x8OHL8j_3t12U2ealHN0O/gCF52ODnDjyFWd9bQgwyL_image.png)
:::

:::WorkflowBlockItem
Click **Add**

![](https://api.archbee.com/api/optimize/x8OHL8j_3t12U2ealHN0O/wPUFXBSDl7uayvINar6X7_image.png)
:::

::::WorkflowBlockItem
Emissions are calculated based on the amount of waste gas exported to each process

:::hint{type="info"}
In the below example, emissions from the production process are calculated using [equation 54](docId\:nMVRCWOq2rBDvKRVifvn_), taking into account the amount of waste gas exported to each process, the standard emission factor of natural gas (56.1 tCO2/TJ), and the correction factor (***Corr**`η`* = 0,667). 

Simultaneously, emissions from the waste gas imported to each process are calculated using [equation 53](docId\:nMVRCWOq2rBDvKRVifvn_), where the correction factor is not applied. Hence, the attributed emissions are higher than those deducted from the originating process (blast furnace).
:::

![](https://api.archbee.com/api/optimize/x8OHL8j_3t12U2ealHN0O/9vBGG7f7CaE0HtXK709Qx_image.png)
::::
:::::