Million standard cubic feet per day

A plant is to be designed to produce 20 million standard cubic feet per day (0.555 x 106 standard m3/day) of hydrogen of at least 95 per cent purity. The process to be employed is the partial oxidation of oil feedstock.1-3... 

Air Products plans on constructing a new hydrogen production plant in Port Arthur, Texas to supply 110 million standard cubic feet per day of hydrogen to Premcor Refining and others on Air Product s Gulf Coast hydrogen pipeline system. 

Equations (3.32) and (3.33) display how to calculate molar rates starting with gas in million standard cubic feet per day (mmscfd) and liquid in gallons per minute (gpm). 

Please note the gas and oil rates are given in Fig. 4.11 as mass rates. The computer program on the CD accompanying this book presents a more user-friendly input in barrels per day for oil and water and million standard cubic feet per day for gas. 

Kvaemer Oil Gas, Norway, has introduced a process for manufacturing carbon black that generates substantial quantities of byproduct hydrogen. In 1998 the process was installed in Montreal, Quebec (Canada) to produce 20,000 tonnes of carbon black and 50 million Nm3 per year (5.2 million standard cubic feet per day) of hydrogen. The process appears to be economic only when the carbon black can also be sold as an end product.40... 

Process design and economic evaluation of a 760 million standard cubic feet per day gas flowrate (MMSCFD) H2 plant with CO2 separation to provide a carbon-free "clean fuel" showed the potential for over 30% capital cost savings in the syngas production step... 

K Kelvin MMSCFD Million Standard Cubic Feet per Day... 

Feed gas reduced from 1,460 Million Standard Cubic Feet per Day (MMSCFD) to 600 MMSCFD immediately following cold section trip... 

The largest H2 plants that are under constmction have capacities of200 million standard cubic feet per day and operate on natural gas. Hydrogen can be produced from water and high-temperature heat (see below). A 1600-MW(t) reactor would be required to produce the energy to manufacture 200 million standard cubic feet per day—assuming 50% efficient conversion of thermal energy to H2. By the time the AHTR could be deployed, its proposed size [2000+ MW(t)] will match the production capacity requirements of a conventional H2 plant. 

Large compressor stations (at least 100 million standard cubic feet per day (MMscfd) of gas) These stations have veiy large compressors powered by reciprocating engines or combustion turbines that bum gas from the pipeline. 

Experience has demonstrated that nuclear energy production in small units on a small scale is not economically viable. If nuclear energy is to be used for economic H2 production, the H2 demand must match the scale of H2 production from a nuclear reactor. The newest world-class H2 plants that are under construction have capacities of 200 million standard cubic feet per day—equivalent to a l,600-MW(th) reactor. The size of H2 plant, in terms of energy flows, are rapidly approaching the size of large nuclear power plants. Large plants are now on H2 pipeline systems and the scale of H2 demand and the scale of nuclear power plants match. 

Production of 137 million standard cubic feet per day (scf/d) of synthetic natural gas (SNG) from coal gas produced in 14 Lurgi gasifiers at the Dakota (formally known as the Great Plains) coal gasification project in North Dakota... 

Replacement of conventional gas-actuated valves to control flow from gas wells with no-loss systems eliminated cold venting of methane from a large production operation. This change gave the business unit an additional 5 million standard cubic feet per day of sales gas. 

A comparison of capital cost estimates from the two economic studies that provide such information is given in Table 16-7. The data are given as dollars per million standard cubic feet per day (MMscfd) plant capacity. Results of the two studies are not directly comparable because the Schaack and Chan estimates are based on a grass-roots plant and include such incidental items as heated process buildings for water-based processes, truck loading dock and shelter where needed, and a water well with pump. The Houghton and BucklLn estimates (U.S. dollars) are based on the principal items of equipment only and a more recent time period. 

In the past the liquefaction of natural gas used a classic cascade cycle. The process required 120,000 horsepower for liquefaction of over 150 million standard cubic feet per day. Provisions are made for some of these cycles to use seawater for cooling. Later, baseload LNG plants utilized mixed refrigerant cycles, such as Air Products and Chemicals, Inc. s propane precooled mixed refrigerant system. Baseload plant capacities range from about 70mmscf/day to about 350mmscf/day of LNG. Baseload plants move LNG from remote sites by ship to populated areas. For example, Indonesia supplies LNG to Japan for electric power generation. ... 

The amount of gas used by field engines is usually in the 0.5-2.0-MMscfd (million standard cubic feet per day) range—too small to make treatment of the gas by refrigeration economical. As a consequence, many engine users are forced to live with the problem gas and the resulting low reliability and high maintenance costs. 

MMscfd Million standard cubic feet per day. Used to describe flow rates for gaseous hydrocarbon and industrial chemical process or pipeline streams, especially in the natural gas and gas processing industries. 

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