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Title: Sng Gas Measurement
Author: Kenneth J. Fulk
Source: 1975 Appalachian Gas Measurement Short Course
Year Published: 1975
Abstract: Substitute natural gas (SNG) manufacture is a new industry in the United States. The first gas produced was in early 1973. Today there are several plants producing substitute gas with others under construction or in the process of being started. Like some of the other plants the Columbia LNG Corporation uses the proprietary British Gas Council catalytic rich gas (CRG) process for hydrocarbon gasification. It is a process that uses a special nickel oxide catalyst that in the presence of steam converts hydrocarbon feedstocks into methane, the primary constituent of natural gas. The produced gas has a final heating value over 1000 BTU/SCF and is interchangeable with pipeline natural gas. As far as measurement of the gas is concerned, it can be measured using standard gas measurement equipment. The only real difference between the two is that the minor or trace components of each are different and must be accounted for in their measurement. As shown in Table 1 natural gas historically has contained minor amounts of ethane, propane, and other compounds. The minor compounds in substitute natural gas are primarily hydrogen and carbon dioxide.

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