Generating hydrogen from refinery waste and consumer waste plastic for supply to hydroprocessing

A system comprising:

• an electrolysis unit configured to receive a water stream and electrical power derived from a renewable energy source, the electrolysis unit configured to use the electrical power to perform electrolysis on the water stream to produce an oxygen stream comprising oxygen and a hydrogen stream comprising hydrogen;
• a gasification unit configured to receive a gasification feed stream comprising consumer waste plastics, a waste stream from a hydrocarbon refinery, or both, the gasification unit configured to partially oxidize the gasification feed stream using at least a portion of the oxygen stream produced by the electrolysis unit to produce a syngas stream comprising carbon dioxide, carbon monoxide, and hydrogen;
• a water-gas shift unit configured to receive the syngas stream from the gasification unit, the water-gas shift unit configured to react at least a portion of the carbon monoxide of the syngas stream with water to produce additional carbon dioxide and hydrogen, thereby producing a shifted syngas stream, wherein the shifted syngas stream has a greater hydrogen content in comparison with the syngas stream;
• a hydroprocessing unit configured to receive a hydrocarbon feed stream, at least a portion of the hydrogen of the shifted syngas stream, and a first portion of the hydrogen stream produced by the electrolysis unit, the hydroprocessing unit configured to react the hydrocarbon feed stream with the hydrogen of the shifted syngas stream and the first portion of the hydrogen stream to remove non-carbon impurities from the hydrocarbon feed stream and break carbon-carbon bonds in the hydrocarbon feed stream, thereby producing a hydroprocessing product stream comprising a saturated hydrocarbon;
• and
• a hydrogenation unit configured to receive at least a portion of the carbon dioxide of the shifted syngas stream and a second portion of the hydrogen stream produced by the electrolysis unit, the hydrogenation unit configured to hydrogenate at least the portion of the carbon dioxide of the shifted syngas stream using the second portion of the hydrogen stream, thereby producing a product stream comprising a hydrocarbon, an oxygenate, or both.