Modularized system and method for urea production using stranded natural gas

摘要

A modular system and method for producing urea from stranded natural gas includes removal of foreign particulate matter to obtain a substantially homogeneous gas. The gas is processed by controlling the quality of the stranded natural gas to maintain a substantially homogenous mixture The resultant gas stream is further cleaned and compressed to a high pressure of about 3,000 psi. The resultant ammonia stream is processed in a bypass recycling loop system at 30% conversion rate at a high pressure of about 6,000 to 7,000 psi. The equipment associated with each of the process steps may be skid mounted for portability and/or contained within the footprint of a standard 48-foot flatbed trailer.

主权项

1. A method for producing urea from a stranded natural gas feedstock, the method comprising the steps of:
i. capturing at a stranded natural gas source site a natural gas feedstock that includes at least two stranded natural gas feedstocks each coming from a different stranded natural gas source; ii. blending at the stranded natural gas source site the at least two captured stranded natural gas feedstocks with one another to form a blended natural gas feedstock having a BTU content less variable than a BTU content of the at least two captured stranded natural gas feedstocks; iii. removing moisture and potential disruptive inorganics and organics from the blended natural gas feedstock; iv. reformulating the clean blended natural gas feedstock; v. recovering a CO2 stream from the reformulated natural gas feedstock; and vi. combining the recovered CO2 stream with a NH3 stream to form the urea.