Methods for reducing formation of carbon disulfide in steam cracking processes to produce olefins

A method for producing olefins, the method comprising:

• passing a hydrocarbon feed comprising one or more hydrocarbons to a hydrocarbon cracking unit;
• passing a hydrogen sulfide containing stream to the hydrocarbon cracking unit, where:
• the hydrogen sulfide containing stream comprises hydrogen sulfide and a dilution gas;
• a concentration of hydrogen sulfide gas in the hydrogen sulfide containing stream is less than or equal to 10,000 ppmw;
• and
• a flow rate of the hydrogen sulfide containing stream to the hydrocarbon cracking unit is sufficient to produce a molar concentration of elemental sulfur in the hydrocarbon cracking unit of from 10 ppm to 200 ppm;
• cracking at least a portion of the hydrocarbon feed in the hydrocarbon cracking unit to produce a cracker effluent;
• and
• contacting the cracker effluent with a quench fluid in a quench unit to produce at least a cracked gas and a first pygas, wherein the cracked gas comprises at least one olefin product and the first pygas has a concentration of carbon disulfide less than 50 ppmw based on the total mass flow rate of the first pygas.