sulfur dioxide negative value

Question

I've inserted an elementary flow of sulfur dioxide in the input flow. The sulfur dioxide value becomes negative after running the LCIA of the product system. Suppose the sulfur dioxide is released to the environment, instead, the result shown the sulfur dioxide is absorbed.

Answer 1

So but why did you enter the SO2 as input? This means the SO2 is consumed (and thus yields a negative value in the calculation). Enter it as output, this will reflect that the SO2 is released. Good luck!

Comments

ok in the vulcanisation you have of course sulphur input but probably not SO2. But from your description, you model until the rubber compound. It is then ok if you do not have SO2 emissions since these will occur later once the rubber compound product is incinerated, at end of life.