Enhanced hydroprocessing process with ammonia and carbon dioxide recovery

A process for capturing carbon dioxide, the process comprising the steps of:

• mixing a hydrogen stream and a feedstock stream to produce a mixed stream, wherein the feedstock stream comprises hydrocarbons, wherein the hydrogen stream comprises hydrogen;
• introducing the mixed stream to a hydroprocessing unit, the hydroprocessing unit configured to process the hydrocarbons to produce light products in a primary reactor, wherein the pressure of the mixed stream is between 10 bars and 200 bars;
• reacting the hydrocarbons and the hydrogen in the primary reactor of the hydroprocessing unit to produce a hydroprocessing product stream and a carbon dioxide stream, wherein the hydroprocessing product stream comprises light products, wherein the carbon dioxide stream comprises carbon dioxide and gas contaminants, wherein the hydroprocessing unit is further configured to produce ammonium bisulfide, wherein the gas contaminants are selected from the group consisting of oxygen, nitrogen, nitrogen oxides, sulfur oxides, and combinations of the same;
• introducing a water stream to the hydroprocessing unit, wherein the water stream comprises water;
• collecting the ammonium bisulfide produced in the hydroprocessing unit in the water of the water stream to produce a sour water;
• introducing the sour water to a waste water unit;
• processing the sour water in the waste water unit to produce an ammonia stream, a hydrogen sulfide stream, and a stripped water stream, wherein the ammonia stream comprises ammonia, wherein the waste water unit separates the ammonia bisulfide from sour water stream and then converts the ammonium bisulfide to ammonia;
• introducing the ammonia stream to a carbon dioxide recovery system;
• introducing the carbon dioxide stream to the carbon dioxide recovery system;
• and
• separating carbon dioxide from the carbon dioxide stream using the ammonia in the ammonia stream to produce a carbon dioxide product.