methane

methane
Name	Methane
Chemical formula	CH4
Molar mass	16.04 g·mol−1
Appearance	colorless, odorless gas
Density	0.656 kg·m−3 (gas at 0 °C)
Melting point	−182.5 °C
Boiling point	−161.5 °C
Solubility	22.7 mg·L−1 (20 °C, water)

methane

Introduction

Methane is a simple hydrocarbon and the principal component of natural gas; it appears in discussions of United Nations Framework Convention on Climate Change, Intergovernmental Panel on Climate Change, European Commission energy policy, United States Environmental Protection Agency, and World Health Organization assessments. Industrial contexts linking Shell plc, ExxonMobil, Gazprom, Chevron Corporation, and BP highlight methane’s role in global markets, while scientific studies from institutions such as Massachusetts Institute of Technology, University of Cambridge, California Institute of Technology, National Aeronautics and Space Administration, and European Space Agency investigate its chemical behavior and planetary distribution.

Chemical Properties and Structure

Methane’s molecular geometry is tetrahedral, a topic addressed in textbooks from Royal Society of Chemistry, American Chemical Society, University of Oxford Press, Springer Nature, and Wiley. Quantum mechanical descriptions using methods developed at Los Alamos National Laboratory, Lawrence Berkeley National Laboratory, Max Planck Society, CERN, and Oak Ridge National Laboratory explain its bonding and vibrational modes relevant to spectra used by Infrared Astronomical Satellite, James Webb Space Telescope, Hubble Space Telescope, Very Large Telescope, and Keck Observatory. Thermodynamic data cited in compilations by International Union of Pure and Applied Chemistry, National Institute of Standards and Technology, IUPAC, NIST Chemistry WebBook, and CRC Press give values for enthalpy, entropy, and heat capacity; kinetic studies from California Institute of Technology and Princeton University examine reaction pathways with radicals such as hydroxyl in atmospheres studied by NOAA, NASA Goddard Space Flight Center, European Centre for Medium-Range Weather Forecasts, Met Office, and National Oceanic and Atmospheric Administration.

Production and Sources

Major anthropogenic and natural sources are documented by agencies including International Energy Agency, Food and Agriculture Organization of the United Nations, United Nations Environment Programme, World Bank, and US Geological Survey. Fossil-fuel extraction by companies like TotalEnergies, Eni, ConocoPhillips, Occidental Petroleum, and Sinopec produces methane via venting and fugitive emissions; agriculture practices tied to Dairy Farmers of America, Cargill, JBS S.A., Archer Daniels Midland, and Kraft Heinz contribute through enteric fermentation and manure management. Natural geologic emissions occur in regions studied by United States Geological Survey, Geological Survey of Canada, Norwegian Petroleum Directorate, Petroleum Geo-Services, and events like the Siberian permafrost thaw and seeps off Gulf of Mexico and North Sea continental shelves. Biogenic production involves microbial consortia described in work from Max Planck Institute for Marine Microbiology, Woods Hole Oceanographic Institution, Scripps Institution of Oceanography, Smithsonian Institution, and Monterey Bay Aquarium Research Institute.

Environmental Impact and Climate Role

Methane is a potent greenhouse gas discussed in reports by the Intergovernmental Panel on Climate Change, United Nations Environment Programme, World Meteorological Organization, European Environment Agency, and US Environmental Protection Agency. Atmospheric lifetime and radiative forcing metrics are central to mitigation frameworks under the Paris Agreement, Kyoto Protocol, Glasgow Climate Pact, Montreal Protocol discussions, and national commitments submitted to United Nations Framework Convention on Climate Change. Climate models from Hadley Centre, Goddard Institute for Space Studies, National Center for Atmospheric Research, IPSL, and Lawrence Livermore National Laboratory simulate feedbacks involving permafrost in Siberia, methane hydrates in the Arctic Ocean, and wetlands mapped by Global Wetlands Project and Ramsar Convention inventories. Policy responses from European Green Deal, Inflation Reduction Act, UK Climate Change Act, China’s Five-Year Plan, and India’s National Action Plan on Climate Change include methane-specific strategies promoted by coalitions like the Global Methane Pledge.

Uses and Applications

Methane’s principal commercial use as a fuel and chemical feedstock is integral to energy systems overseen by International Energy Agency, traded on markets such as New York Mercantile Exchange, ICE Futures Europe, Tokyo Commodity Exchange, Shanghai Futures Exchange, and regulated by entities like Federal Energy Regulatory Commission and Ofgem. Industrial applications by corporations including BASF, Dow Chemical Company, DuPont, INEOS, and LyondellBasell employ methane as a feedstock for hydrogen production, methanol synthesis, and ammonia manufacture relevant to Haber–Bosch process facilities and fertilizer producers like Yara International and CF Industries. Emerging technologies developed at Siemens Energy, Bloom Energy, Ballard Power Systems, Plug Power, and General Electric explore methane reforming, fuel cells, power-to-gas, and carbon capture linked to projects funded by European Investment Bank and World Bank.

Detection, Measurement, and Regulation

Detection and quantification methods are advanced by satellite missions such as Sentinel-5P, TROPOMI, GHGSat, Envisat, Orbiting Carbon Observatory-2 and ground networks operated by NOAA, European Monitoring and Evaluation Programme, National Atmospheric Emissions Inventory, Environmental Protection Agency, and research programs at Imperial College London, ETH Zurich, University of Tokyo, Columbia University, and Princeton University. Leak detection and repair technologies commercialized by FLIR Systems, Spectris, Siemens Energy, Honeywell, and ABB Group combine optical gas imaging, cavity ring-down spectroscopy, and tunable diode laser absorption spectroscopy validated in field trials coordinated with regulators such as US Environmental Protection Agency, European Commission, Environment and Climate Change Canada, Australian Department of Climate Change, Energy, the Environment and Water, and Ministry of Ecology and Environment (China). International standards from International Organization for Standardization, American Society for Testing and Materials, International Electrotechnical Commission, and reporting frameworks under Task Force on Climate-related Financial Disclosures guide measurement, reporting, and verification for mitigation policies like emissions trading schemes implemented in European Union Emissions Trading System and regional programs in California Cap-and-Trade Program.

Category:Hydrocarbons