CNG,LNG,PNG,LPG…. Petrochemicals and hydrocarbons dominate modern civilization, but they were not the first fossil fuels to power human progress. Industrial Revolution is widely associated with the invention and commlz of the steam engine by James Watt around 1776. This yr is also significant for intellectual development—Adam Smith’s “The Wealth of Nations” was published the same yr, laying the foundation of modern economics. These parallel deve marked the beginning of fossil fuel–driven economic growth. Coal was the primary fuel that powered this transformation. It enabled the replacement of manual labour , acce indus productivity and eco growth. Petroleum had been known to humans for centuries, its widespread use began only with the advent of the internal combustion engine in the late 19th Cen. Its impor grew significantly during the 2nd World War. Petroleum’s high energy density made it suitable for mobility, and even today, replacing it remains a challenge despite advancement in EV. Recent geopolitical conflicts in the ME, remind us of the continued strategic imp oil and gas. In such times, discussion around CO₂ emiss & net zero targets often take a back seat. Why petroleum popular? One reason is energy density and convenience. Petro products have a calorific value of around 10,000 kcal/kg, whereas coal averages about 5,000 kcal/kg. In addition, petroleum fuels are easier to handle, transport, and use efficiently. Another factor is the uneven global distribution of oil reserv, which adds geopolitical complexity. Geologically: Coal is related Carboniferous Era —a time when vast swamp forests exits and these forests, buried under sediments and trans to coal. On contrary petroleum does not belong to a single geological era. It formed across multiple periods, primarily from marine microorganisms buried in ocean basins over million of yrs. Today, we are familiar with LPG, PNG, CNG, and LNG. What are the diff? 1.LPG (Liquified Petroleum Gas): Mainly propane (C₃H₈) and butane (C₄H₁₀), liquefied under moderate pressure. 2.PNG (Piped Natural Gas): Primarily methane (CH₄), supplied in gaseous form through pipelines. 3.CNG (Compresed Natural Gas): Methane stored at high pressure. 4.LNG (Liquified Natural Gas): About 95% CH4 , liquefied at very low temp for storage and transport. Carbon footprint perspective, LPG and natural gas (~ 25% H2) are cleaner than liquid fuels like petrol and diesel (~14% H2) , as they contain a higher % H2. Coal is mainly carbon, about 3–5% hydrogen, making it the most Carbon int fossil fuel. Countries that have shifted from coal-based thermal power to natural gas—have gained env advd on CO2 emiss, even though both remain fossil fuels. At present situation during shortage of H-C along with summer demand India again has to depend on coal and increase thermal power generation as electricity will be used in different pur and it’s good that Indian railways is mostly electrified. #Powerplantchemistry
