CNG Acid gas removal process. Technical progress report 2, 1 December 1983-29 February 1984

Development work on the CNG acid gas removal process under DOE Contract No. AC21-83MC20230 continued during the period December 1, 1983 through February 29, 1984. Two tasks were active during this time: Task 1 hydrogen sulfide absorber (design and construction of hydrogen sulfide absorber); and Task 4 technology transfer. Within Subtask 1.1, the flow sheet of the integrated hydrogen sulfide absorber and the carbon dioxide triple-point crystallizer is reviewed. Control objectives of the hydrogen sulfide absorber and control strategies were established and are discussed. Within Subtask 1.2, detailed engineering designs have been completed for the absorption column, the light ends flasher, cooler/condenser, and the liquid carbon dioxide surge tank. This equipment is now in various stages of construction. Other process equipment specified and placed on order includes the main gas compressor, recycle light ends gas compressor, liquid carbon dioxide absorbent pump, and the concentrated acid gas stream pump. Within Task 4, two papers discussing the CNG acid gas removal technology have been prepared. One paper will be presented in the Acid and Sour Gas Symposium at the AIChE Winter National Meeting, Atlanta, Georgia. The other paper will be presented at the Eleventh Energy Technology Conference, Washington, DC. 10 figs., 5more » tabs.« less