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Recent Trends in Natural Gas and City Gas Distribution Network
Published in Anirbid Sircar, Gautami Tripathi, Namrata Bist, Kashish Ara Shakil, Mithileysh Sathiyanarayanan, Emerging Technologies for Sustainable and Smart Energy, 2022
Namrata Bist, Anirbid Sircar, Kriti Yadav
Hydrogen can be blended with methane in certain proportions and may act as a transportation fuel for vehicles. Hydrogen compressed natural gas is the name of the mixture (HCNG). CNG emits very little HC and CO2, as well as very little SOx and PM, rendering it a “clean” fuel. Natural gas also has a major research octane rating of 130, which is an added benefit. This implies that a natural gasoline engine can run at compression ratios with banging than a petrol engine, enhancing thermal performance.
Hydrogen
Published in Arumugam S. Ramadhas, Alternative Fuels for Transportation, 2016
Fernando Ortenzi, Giovanni Pede, Arumugam Sakunthalai Ramadhas
A good opportunity in the short-term can be represented by the utilization of blends of hydrogen with other fuels, first of all with natural gas (HCNG). When used in an ICE, even the addition of a small amount of hydrogen to natural gas (5–30% by volume that means ∼1.5–10% by energy) leads to many advantages, because of some particular physical and chemical properties of the two fuels.
Dual fuel engines fueled with three gaseous and biodiesel fuel combinations
Published in Biofuels, 2018
N. R. Banapurmath, V. S. Yaliwal, R. S. Hosmath, M. R. Indudhar, Suresh Guluwadi, Saurabh Bidari
Utilization of hydrogen and natural gas blends in internal combustion engines was started in the early 1990s. Blending of hydrogen with CNG provides a hydrogen-enriched natural gas called hydrogen enriched compressed natural gas (HCNG). HCNG combines the advantages of both hydrogen and methane; 5–30% (by volume) addition of hydrogen in CNG improves the composition and properties of base fuel CNG. From Dalton's partial pressure law, hydrogen fraction is decided by the partial pressure of the two fuels in the HCNG tank. The influence of gas composition on engine behavior can be adequately characterized by the Wobbe index. If the Wobbe index remains constant, change in the gas composition will not lead to a noticeable change in the air–fuel ratio and combustion rate [32,41,47]. The use of hydrogen in internal combustion (IC) engines is very attractive to propel hydrogen economy. Hydrogen is a carbon free gaseous fuel when used in IC engines; it reduces all carbon-based emissions such as smoke, hydrocarbon and carbon monoxide. It also increases brake thermal efficiency, since its burning velocity, reactivity and diffusivity is much higher [41]. Hydrogen addition to CNG or producer gas is a very effective method to improve the burning velocity of the gaseous fuel. However, addition of hydrogen in producer gas is not addressed in this paper.
Thermodynamic and experimental analysis of hydrogen addition to CNG in a spark ignition engine for emission reduction
Published in Energy Sources, Part A: Recovery, Utilization, and Environmental Effects, 2020
Fereshteh Khodamrezaee, Ali Keshavarz
The mixture of Hydrogen and CNG (HCNG) considers an alternative fuel, which enhance the CNG flame speed and flammability in lean burn condition, and therefore decreases engine exhaust emissions. In addition, HCNG fuel shortens the combustion duration and enhances the engine efficiency.