Which preposition should be used after the verb “request”? [duplicate]

3 is out: one might request an item from a person, but not generally a behavior.

2 is correct but the "of" is unnecessary.

1 just sounds better than the others because it is less wordy.

However, the most direct is, "Please refrain from shouting." Why make it complicated?

There is another obvious one to add to your list:

“I would like to request you refrain from shouting.”

I think there are people who use all three forms you suggested. It's a little difficult to say which one is correct but as kajaco said 3. sounds a bit odd.

How about this:

I would like to request that you to refrain from shouting.