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Title: Northern Illinois Gas Company Supplemental Natural Gas Plant Startup
Author: Norman W. Merriam, Richard J. White
Source: American Gas Association 1975
Year Published: 1975
Abstract: Northern Illinois Gas Companys (NI-Gas) SNG Plant, located in Northeastern Illinois, consists of two identical units. Each is designed to produce 92 million cubic feet per day of Supplemental Natural Gas, using feedstock comprised of ethane, propane, butane, natural gasoline, and light naphtha. The normal plant capacity is 184 million cubic feet per day. The plant uses British Gas Corporations CRG process. Process design was done by Woodall-Duckham, with American Bechtel responsible for mechanical design and construction. The plant was brought on-stream in late 1974. It has been run at more than designed capacity and has demonstrated a thermal efRciency as high as 96 percent. The main process units were brought on line within two weeks after turnover from the contractor, and were brought to full capacity within a few days. The plant has had a good initial on-stream factor for a new plant.

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