System and methods for producing oil and/or gas

A method comprising:

• oxidizing a first portion of a sulfur compound in a first reaction zone to yield sulfur dioxide;
• reacting at least a portion of the sulfur dioxide with a second portion of sulfur compound in a second reaction zone to yield sulfur;
• and
• reacting at least a portion of the sulfur with one or more hydrocarbons in a third reaction zone to yield a carbon disulfide formulation;
• further comprising heat exchanging at least a portion of the carbon disulfide formulation with at least a portion of the hydrocarbons, cooling the carbon disulfide formulation, and heating the hydrocarbons.