The OXCO Process: The Direct Conversion of Natural Gas to Olefins and Liquid Fuels Using Fluidized-Bed Technology

1992 ◽  
pp. 429-462 ◽  
Author(s):  
J. H. Edwards ◽  
K. T. Do ◽  
R. J. Tyler
Keyword(s):  
Natural Gas ◽  
Fluidized Bed ◽  
Direct Conversion ◽  
Liquid Fuels

Direct conversion of carbon dioxide to liquid fuels and synthetic natural gas using renewable power: Techno-economic analysis

2019 ◽  
Vol 34 ◽  
pp. 293-302 ◽  
Author(s):  
Chundong Zhang ◽  
Ruxing Gao ◽  
Ki-Won Jun ◽  
Seok Ki Kim ◽  
Sun-Mi Hwang ◽  
...  
Keyword(s):  
Carbon Dioxide ◽  
Natural Gas ◽  
Economic Analysis ◽  
Direct Conversion ◽  
Liquid Fuels ◽  
Synthetic Natural Gas ◽  
Renewable Power

Methods to Improve Combustion Stability, Efficiency, and Power Density of a Small, Port-Injected, Spark-Ignited, Two-Stroke Natural Gas Engine

2017 ◽  
Author(s):  
Derek Johnson ◽  
Mahdi Darzi ◽  
Chris Ulishney ◽  
Mehar Bade ◽  
Nima Zamani
Keyword(s):  
Natural Gas ◽  
Power Density ◽  
Low Cost ◽  
Exhaust System ◽  
Combustion Stability ◽  
Liquid Fuels ◽  
Delivery Ratio ◽  
Resonance Theory ◽  
Indicated Mean Effective Pressure ◽  
Exhaust Systems

Two-stroke engines are often used for their low cost, simplicity, and power density. However, these engines suffer efficiency penalties due to fuel short-circuiting. Increasing power density has previously been an area of focus for performance two-stroke engines — such as in dirt bikes. Smaller-displacement engines have also been used to power remote controlled cars, boats, and aircraft. These engines typically rely on gasoline or higher-octane liquid fuels. However, natural gas is an inherently knock-resistant fuel and small natural gas engines and generators could see increased market penetration. Power generators typically operate at a fixed frequency with varied load, which can take advantage of intake and exhaust system tuning. In addition, stationary engines may not be subject to size restrictions of optimal intake and exhaust systems. This paper examines methods to improve combustion stability, efficiency, and power density of a 29cc air-cooled two-stroke engine converted to operate on natural gas. Initial conversion showed significant penalties on delivery ratio, which lowered power density and efficiency. To overcome these issues a tuned intake pipe, two exhaust resonators, and a combustion dome were designed and tested. The engine was operated at 5400 RPM and fueling was adjusted to yield maximum brake-torque (MBT). All tests were conducted under wide-open throttle conditions. The intake and exhaust systems were designed based on Helmholtz resonance theory and empirical data. The engine utilized a two-piece cylinder head with removable combustion dome. The combustion dome was modified for optimal compression ratio while decreasing squish area and volume. With all designs incorporated, power increased from 0.22 kW to 1.07 kW — a factor of 4.86. Efficiency also increased from 7% to 12%. In addition to these performance gains, the coefficient of variation (COV) of indicated mean effective pressure (IMEP) decreased from just above 11% to less than 4%.

Liquid Fuels from Natural Gas

2007 ◽  
pp. 153-170 ◽  
Author(s):  
James Speight
Keyword(s):  
Natural Gas ◽  
Liquid Fuels

scholarly journals Synthesis of Liquid Fuels from Natural Gas.

1997 ◽  
Vol 40 (4) ◽  
pp. 243-251 ◽  
Author(s):  
Tomoyuki INUI
Keyword(s):  
Natural Gas ◽  
Liquid Fuels

scholarly journals Natural gas: alternative source of liquid fuels

1986 ◽  
Author(s):  
G Jean ◽  
V Allenger ◽  
M Ternan
Keyword(s):  
Natural Gas ◽  
Liquid Fuels ◽  
Alternative Source

Sequential-Based Process Modeling of Natural Gas Combustion in a Fluidized Bed Reactor

2012 ◽  
Vol 26 (4) ◽  
pp. 2058-2067 ◽  
Author(s):  
Abolhasan Hashemi Sohi ◽  
Ali Eslami ◽  
Amir Sheikhi ◽  
Rahmat Sotudeh-Gharebagh
Keyword(s):  
Natural Gas ◽  
Fluidized Bed ◽  
Process Modeling ◽  
Fluidized Bed Reactor ◽  
Gas Combustion ◽  
Natural Gas Combustion
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