How to add an emoji tag to the page's title tag?

Question

I'm using this library to add emojis to my page. It works great. But, now I want to add an emoji the page's title but it doesn't work.

The emoji tag looks like this:

<i class="em em-rocket">

If I do this:

  <title>Seif Rocks <i class="em em-rocket"></i></title>

It looks like this without showing the emoji:

Seif Rocks <i class="em em-rocket"></i>

Is it possible to add an HTML tag to the title tag?