An integrated system, comprising: a component comprising a cryogenic distillation tower for separating contaminants comprising carbon dioxide from an input feed stream; a liquefied natural gas ("LNG") regasification system comprising a LNG storage tank, a heat exchanger, wherein the heat exchanger is coupled to a first line and to a first LNG line, wherein the first line is coupled to the component for separating contaminants to direct a first feed stream of the first line from the heat exchanger to the component for separating contaminants, and wherein the heat exchanger is configured to cool the first feed stream of the first line, wherein the first LNG line is coupled to the LNG storage tank to direct a LNG stream from the LNG storage tank to the heat exchanger to act as a cooling fluid stream for the first feed stream, wherein the heat exchanger is configured to function as a vaporizer for the LNG stream, wherein the heat exchanger is configured to heat the LNG stream of the LNG regasification system using the first feed stream as heat source; and a second heat exchanger coupled to a second line and to a second LNG line, wherein the second line is coupled to the cryogenic distillation tower to direct a second feed stream from the cryogenic distillation tower to the second heat exchanger, wherein the second heat exchanger is configured to cool the second feed stream of the second line, wherein the second LNG line is coupled to the LNG storage tank to direct a second LNG stream from the LNG storage tank to the second heat exchanger to act as a cooling fluid stream for the second feed stream, wherein the second heat exchanger is configured to function as a vaporizer for the second LNG stream, wherein the second heat exchanger is configured to heat the second LNG stream of the LNG regasification system using the second feed stream as heat source; and wherein lines (15, 63) are provided that combine the second feed stream and the second LNG stream downstream of the second heat exchanger. a component comprising a cryogenic distillation tower for separating contaminants comprising carbon dioxide from an input feed stream; a liquefied natural gas ("LNG") regasification system comprising a LNG storage tank, a heat exchanger, wherein the heat exchanger is coupled to a first line and to a first LNG line, wherein the first line is coupled to the component for separating contaminants to direct a first feed stream of the first line from the heat exchanger to the component for separating contaminants, and wherein the heat exchanger is configured to cool the first feed stream of the first line, wherein the first LNG line is coupled to the LNG storage tank to direct a LNG stream from the LNG storage tank to the heat exchanger to act as a cooling fluid stream for the first feed stream, wherein the heat exchanger is configured to function as a vaporizer for the LNG stream, wherein the heat exchanger is configured to heat the LNG stream of the LNG regasification system using the first feed stream as heat source; and wherein the first line is coupled to the component for separating contaminants to direct a first feed stream of the first line from the heat exchanger to the component for separating contaminants, and wherein the heat exchanger is configured to cool the first feed stream of the first line, wherein the first LNG line is coupled to the LNG storage tank to direct a LNG stream from the LNG storage tank to the heat exchanger to act as a cooling fluid stream for the first feed stream, wherein the heat exchanger is configured to function as a vaporizer for the LNG stream, wherein the heat exchanger is configured to heat the LNG stream of the LNG regasification system using the first feed stream as heat source; and a second heat exchanger coupled to a second line and to a second LNG line, wherein the second line is coupled to the cryogenic distillation tower to direct a second feed stream from the cryogenic distillation tower to the second heat exchanger, wherein the second heat exchanger is configured to cool the second feed stream of the second line, wherein the second LNG line is coupled to the LNG storage tank to direct a second LNG stream from the LNG storage tank to the second heat exchanger to act as a cooling fluid stream for the second feed stream, wherein the second heat exchanger is configured to function as a vaporizer for the second LNG stream, wherein the second heat exchanger is configured to heat the second LNG stream of the LNG regasification system using the second feed stream as heat source; and wherein lines (15, 63) are provided that combine the second feed stream and the second LNG stream downstream of the second heat exchanger. wherein the second line is coupled to the cryogenic distillation tower to direct a second feed stream from the cryogenic distillation tower to the second heat exchanger, wherein the second heat exchanger is configured to cool the second feed stream of the second line, wherein the second LNG line is coupled to the LNG storage tank to direct a second LNG stream from the LNG storage tank to the second heat exchanger to act as a cooling fluid stream for the second feed stream, wherein the second heat exchanger is configured to function as a vaporizer for the second LNG stream, wherein the second heat exchanger is configured to heat the second LNG stream of the LNG regasification system using the second feed stream as heat source; and wherein lines (15, 63) are provided that combine the second feed stream and the second LNG stream downstream of the second heat exchanger.