Trump can only be convicted of committing an actual statute crime, and the only penalty congress can impose is removal from office.
Disqualification from office would require conviction by a federal court after an impeachment conviction.
The congress has no power to enforce federal law.
However see post 62.
I thought so, too, but that is not true.
Article I, Section 3:
Judgment in Cases of Impeachment shall not extend further than to removal from Office, and disqualification to hold and enjoy any Office of honor, Trust or Profit under the United States; but the Party convicted shall nevertheless be liable and subject to Indictment, Trial, Judgment and Punishment, according to Law.