Evaluation of Organometallic Compounds for Use in a Quick-Cycle PSA System forNitrogen Separation from Natural Gas. Final Report, July 1992-September 1993

摘要

This work on separation of N2 from natural gas has involved the technical andeconomic feasibility of nitrogen rejection from natural gas using nitrogen-selective adsorbents and hollow fiber modules with rapid-cycle, low-pressure-drop pressure swing adsorption (PSA). Here rapid means approximately 0.1 s cycle time. Nitrogen-selective adsorbents within the modules ensure that methane and other hydrocarbons in natural gas are delivered to the pipeline with little or no further compression and that nitrogen is rejected to the atmosphere. The principal objective of this study was to synthesize and test the zeolite-encapsulated organometallic compounds that would be used in these modules. This work encompassed the following tasks: (1) synthesis and characterization of novel adsorbents; and (2) process design and economic evaluation. Several adsorbents were synthesized, using organometallic complexing agents and zeolite NaY, and a problem was encountered with deactivation by the zeolite pore environment.