Coal Fleet Retirements in the USA

The coal power industry is under pressure from numerous fronts. Against a background of soft demand, competitive natural gas prices and growing capacity from renewables, the coal power industry is facing a series of major environmental regulations that are forcing power plant owners to either invest in major upgrades or shut down underperforming plants. New…

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Current Policies Supporting Renewable Natural Gas

What is remarkable from this list is how little policy support there is for RNG compared to other renewable energy sources and biofuels. The most significant Federal support comes from the Renewable Fuels Standard which is intended to support ethanol, including both corn ethanol and cellulosic ethanol. Production of cellulosic ethanol has been extremely disappointing,…

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How Dangerous is LNG?

Liquefied natural gas (LNG) is often regarded as extremely dangerous and toxic with container ships called floating bombs. But is this perception accurate? The historical reality is that LNG has the best safety record of all common fuel types and is completely non-toxic. Of course natural gas vapors are flammable and present safety hazards that…

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How Much RNG Can We Produce?

Renewable natural gas (RNG) is methane produced from biomass that is cleaned to pipeline quality standards and blended with fossil natural gas. RNG, also known as biomethane, is carbon-neutral and chemically identical to fossil natural gas allowing it to be blended without restriction. Renewable natural gas is produced from a variety of (mostly waste) resources…

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Renewable Natural Gas vs. Cellulosic Ethanol

The EPA has long promoted cellulosic ethanol as the future of biofuels, but technical challenges have kept production far below targets. A recent rule change allows RNG, renewable natural gas, to qualify as cellulosic biofuel even though RNG is not cellulosic, but this helps EPA appear to be meeting their goals. RNG growth has been…

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Need for a Renewable Gas Standard

The use of natural gas is growing throughout the world as new drilling techniques have opened up vast shale resources and low cost gas is flooding the market. The environmental advantages of natural gas over other fossil fuels have put it in a favored position as emissions regulations continue to tighten around the world. But…

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Reverse Combustion Equation

This equation describes the idea of reverse combustion with renewable methane, carbon capture and oxy-combustion. This is also known as chemical looping and is a form of using renewable natural gas as energy storage. Combustion works by combining fuel (CH4) with oxygen to create heat (energy) plus carbon dioxide (CO2) and water (H2O). Typically the CO2…

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