Coffee Beans in the Secondary

[Forestgrover]

Do you guys have any idea how much residual sugar might be in coffee beans? I transferred the beer to the secondary (once bubbles were between 90-120 seconds apart) and added a half pound of coffee beans. It looks like there is another small krausen forming in between the beans.

Anyone had any experience with this?

 

[Jakemo]

Coffee beans don't have sugar in them, but my bet is that the "krausen between the beans" would be the residual CO2 in the beer being released by the presence of the beans. Just a hunch, don't quote me as scripture