Method for the integration of liquefied natural gas and syngas production

A method for a production of liquefied natural gas (“LNG”), the method comprising the steps of:

• a) operating a syngas production facility that is configured to convert a first natural gas stream into a syngas stream, wherein the syngas production facility is further configured to produce a pressurized steam, wherein the pressurized steam is fed to a steam turbine, wherein during said operating step, the syngas production facility uses a second natural gas stream at a lower pressure than the first natural gas stream;
• b) cooling and liquefying a third natural gas stream using refrigeration provided by at least two different sources to produce an LNG product stream;
• c) providing a first source for the refrigeration used in step b) by expanding the second natural gas stream in a natural gas expander and then warming the second natural gas stream, prior to being used in the syngas production facility in step a), against the third natural gas stream;
• and
• d) providing a second source for the refrigeration used in step b) using a nitrogen refrigeration cycle, wherein the nitrogen refrigeration cycle comprises a nitrogen recycle compressor and at least one turbine, wherein the nitrogen recycle compressor is driven by the steam turbine of the syngas production facility.