What are the low-carbon fuels?

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Many businesses have made it a priority to reduce their carbon footprint. Multiple ways to reduce carbon dioxide (CO2) emissions are available to business owners. 

One is to purchase carbon offsets—pay someone else to reduce emissions on your behalf. Another is to use less energy, for example, have employees travel less often, or by improving the energy efficiency of a building. Using low-carbon and alternative fuels is a third option which has become viable for an increasing number of businesses. Low-carbon fuels can be used as a substitute for traditional fossil fuels in many applications. For example, vehicles of all types, including personal cars, trucks, off-road vehicles, ships, and more can run on low-carbon fuels. Purchasing electricity made from low-carbon fuels or renewable energies is also a way to reduce a business’ carbon footprint. 

Are natural gas and propane low-carbon fuels?

That’s right—despite their fossil origin, natural gas and propane are low-carbon fuels—in comparison to traditional alternatives. Both have a lower emission factor than gasoline and diesel. This means that burning a certain amount or natural gas or propane will release less CO2 than burning the equivalent amount of gasoline or diesel. Fuels with higher carbon contents release more CO2 when they are burned. Natural gas consists primarily of methane. One molecule of methane contains a single atom of carbon. As a result, methane has a lower carbon-to-energy content than other fossil fuels. 

Engines used as mechanical drives in oilfield operations are prime candidates for natural gas operation. Oil wells almost always produce natural gas in addition to oil. When an extraction site doesn’t have infrastructure to collect and transport the available natural gas, the unwanted natural gas is flared. Instead, using this excess natural gas an alternative to diesel for the mechanical drives saves money, reduces emissions, and helps secure the fuel supply. 

Conversions of coal-fired power-plants to natural gas are also a major trend in the power generation sector. You may have read about a local coal power-plant closing? Chances are, it’s being replaced with a natural gas-fired combined cycle power plant. 

What are CNG, LNG, LPG; are they low-carbon fuels?

Tractor-trailers, hauler trucks, dumpster trucks, buses and other commercial vehicles, and even ships can be converted to run on either compressed natural gas (CNG), liquefied natural gas (LNG), or liquefied petroleum gas (LPG, a form of propane). 

This allows the owner to lower the emissions of the converted vehicles without breaking the bank. With the right use case, fuel conversions also provide several other benefits. You can read more about these benefits of alternative fuels and fuel-flexibility.

What are biogas and renewable natural gas?

Gaseous hydrocarbons can also be readily produced from biomass. Like renewable diesel and biodiesel, these fuels are CO2-neutral. Significant amounts are created through natural fermentation in bogs and in the digestive tract of mammals, particularly cows. Bacteria eat organic matter, breaking it down and releasing methane, CO2 and hydrogen sulfide. The resulting gas is known as biogas. 

Biogas is also an unintentional product of fermentation occurring in landfills. In the United States, landfills are required to collect biogas to prevent its emission into the atmosphere. The requirement exists because methane, when it is not burned, is a much stronger greenhouse gas than CO2. While some landfills flare off the collected biogas, others use it productively. Biogas can be used as-is in specially designed internal combustion engines to generate electricity. More simply, it can be burned in a furnace or a boiler for heat. 

How is biogas produced?

In certain use-cases, biogas can also have negative carbon intensity value. This is because the capture and productive use of biogas prevents carbon emissions.

It is also possible to separate the methane from the other, unwanted constituents. Renewable natural gas is then obtained. Renewable natural gas is fully interchangeable with natural gas and can be injected into natural gas pipelines or used on its own.  

Biogas and natural gas are also produced industrially at wastewater treatment plants and livestock operations. Most commonly, biomass—sewage sludge or cow manure—is fermented in large tanks known as digesters, generating biogas. To promote fermentation, the digesters can be heated using waste heat from biogas-fueled on-site generators—a classical use case for combined heat and power. According to the U.S. Department of Energy, about 1,300 wastewater treatment plants in the United States produce biogas by fermentation and use it on-site. 

Running gas generators on biogas or renewable natural gas is a great way to produce CO2 free electricity from renewable resources. Contrary to renewable electricity produced by solar panels and wind turbines, which is inherently variable, renewable electricity produced in a generator using biogas and renewable natural gas is available on-demand. This makes biogas and renewable gas great decarbonization options for facilities which require an always-available source of power on-site for backup, prime or continuous power purposes. This is why many data centers, hospitals, industrial facilities and more are exploring or investing in biogas and renewable gas generators.

What is hydrotreated vegetable oil; is it renewable diesel?

Diesel-like fuels can be manufactured without the use of any fossil resources. Hydrotreated Vegetable Oil (HVO) is one common type. HVO is obtained by processing lipids such as vegetable oil, tallow or used cooking oil, which is made of paraffinic hydrocarbon. The fuel is derived from the same feedstocks used to produce biodiesel. However, instead of using the transesterification process, HVO is produced via the hydrotreated process. HVO is sometimes referred to as renewable diesel, or green diesel. 

What is biodiesel; is biodiesel a low-carbon fuel?

Biodiesel is a distinct fuel. It is made using a chemical process known as transesterification. The transesterification process results in molecules called fatty acid methyl esters, or FAME. Biodiesel consist primarily of these FAME molecules. Fuels meeting the industry standard for renewable diesel can be used as drop-in replacements for fossil diesel. Biodiesels, in contrast, must be blended with fossil diesel to be used in most vehicles. 

When renewable diesel and biodiesel burn, they merely return carbon to the atmosphere—the same carbon atoms that the plants used as feedstock withdrew from the atmosphere. They are, accordingly, net-CO2 free fuels, or CO2-neutral

What are power-to-x and e-fuels?

This is a rapidly emerging category of synthetic low-carbon or no-carbon fuels. E-fuels are manufactured from inorganic feedstock, primarily CO2 and water, using renewable electricity, such as solar, wind, or hydropower. The category includes a variety of hydrocarbon fuels such as e-methanol, e-diesel and e-methane, as well as non-hydrocarbon fuels such as ammonia. Don’t forget to check out what are power-to-x and e-fuels with more details and examples.

What about hydrogen?

Hydrogen burns without releasing any carbon. Not all hydrogen, however, is low-carbon. Most hydrogen produced in the world today is manufactured via the steam methane reforming process. This process uses methane as a feedstock and generates a lot of CO2 (unless the methane feedstock is coming from biogas, in which case the process is CO2-neutral). 

Another process, electrolysis, allows to produce hydrogen from water. Electrolysis is energy-intensive, but when it is conducted using renewable electricity, the result is fully CO2-free hydrogen, or “green hydrogen.” 

A variety of applications that use green hydrogen are commercially available or in development stages, including locomotives, personal vehicles, gas turbines, internal combustion generators, and more. Green hydrogen can also be used as a feedstock for other e-fuels. 

Finding the right alternative fuel for your business

You went through a range of alternative and low-carbon fuels. As you seek to fulfill the needs of your business, it is important to remember there is not a one-size fits all answer. 

Beyond the fuel itself, here are a few others you can take into consideration in finding the right fit for your business: Availability of these fuels across your locations, the local regulations your equipment needs to comply with, and your specific use case.

As you have noticed, these additional considerations are more local and unique to your business. You can access more information and discuss these further by reaching out to a partner local to your business.  

Aytek Yuksel - Cummins Inc

Aytek Yuksel

Aytek Yuksel is the Content Marketing Leader for Cummins Inc., with a focus on Power Systems markets. Aytek joined the Company in 2008. Since then, he has worked in several marketing roles and now brings you the learnings from our key markets ranging from industrial to residential markets. Aytek lives in Minneapolis, Minnesota with his wife and two kids.

How is the United States investing in clean energy?

GR hero

Our planet is facing a dire crisis: carbon dioxide concentrations in the atmosphere continue to soar above record highs. If gone unaddressed, the collective stress of climate change will produce an irreparable impact. Our health, energy, water, and food ecosystems are at risk. 

As it stands, there are many long-term effects of climate change. In North America, climate change is forecasted to cause decreasing snowpack in the western mountains. It will also lead to a 5–20% increase in yields of rain-fed agriculture and great intensity of heat waves. In fact, over the last five years, the United States has incurred roughly $120 billion a year in damages as a result of natural disasters caused by extreme weather and climate events.

Beyond natural catastrophes, climatic risks to the United States will have a cascading effect on the country’s interconnected ecosystems. Reduced labor and overall economic productivity, and altered crop yields, will disproportionately harm lower-income and marginalized populations. These groups lack the resources to prepare or cope with extreme weather and climate events.

The world is investing in clean energy innovation

Combating the intensifying climate crisis requires a strategic combination of research and development (R&D), innovation, technology — and bold attempts.

Around the globe, countries are investing in clean energy to contribute to a livable planet now and for generations to come. In 2022, the US passed the Inflation Reduction Act, which includes a historic $370 billion investment to address the climate crisis. The Inflation Reduction Act provides tax credits and incentives to power homes, businesses, and communities with clean energy by 2030. The Act will increase investments in the fastest-growing power generation technologies, solar and wind. It will also advance cost-saving clean energy projects and protect two million acres of national forests. These initiatives are in addition to substantial tax credits and rebates offered to families and businesses in the United States.
Consequently, a stronger clean energy economy will contribute to overall economic growth and competition. As a result, there will be millions of new well-paying jobs for Americans to make clean energy.

It is possible to start decarbonizing now

Governmental policy strategies and investments in decarbonization technologies are part of the solution to produce increasingly cheap, dependable, and clean energy.

Strong communities and vibrant economies depend on a healthier planet. As a global power technology leader, Cummins is in a unique position to power customer success by leading during this energy transition. We intent to do so by providing customers with the right technology at the right time, understanding of their needs and applications.

We think of this journey to carbon neutrality in two distinct and complementary ways. First, by innovating zero-emission solutions and introducing them in markets and applications where the infrastructure, development and deployment are ready. Secondly, by advancing internal combustion engines through efficiency improvement and by running them on cleaner alternative fuels for a well-to-wheels solution.

Through Destination Zero, we are advancing low- and no-carbon platforms. This includes diesel and natural gas engines, hybrid, and electric platforms, as well as powertrain components, controls, and related technologies.

Join Cummins in powering a better tomorrow

Cummins environmental sustainability strategy includes goals timed for 2030. Progress toward the reduction of carbon emissions from company plants and facilities — in addition to our products — is in full swing. For more than one hundred years, we have brought technological solutions to market. As a power solutions leader, we will continue to power a more prosperous world for today and tomorrow. Are you ready to consider investing in new power solutions?

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Traci Kraus

Traci Kraus is a Director of Government Relations where she leads US federal advocacy for Cummins. She focuses on energy, climate, hydrogen, transportation and budget legislative and regulatory issues. 

Prior to joining Cummins, Traci worked for former U.S. Senator Russ Feingold.  She has a Master’s in Public Administration from the George Washington University and B.A.s in Government and Politics and Communication from the University of Maryland in College Park. She is originally from Chicago, and now lives outside of Washington, D.C. with her husband, Aaron and two children Liam (8) and Sloane (5).

Twelve ways to prepare for winter power outages

home generator in the snow

When a freak winter storm struck Texas in February 2021, the state’s power grid couldn’t handle it. Nearly five million people suddenly found themselves without electricity in freezing temperatures, causing a humanitarian crisis. 

The worst power outage in Texas’ history was a wake-up call. Winter power outages can be serious even if you live in a typically warm climate. 

Here are some time tips in case your family ever finds itself without power in the middle of winter:

  1. Add insulation to your attic — In addition to helping keep the cold out and the heat in, the proper amount of insulation can help prevent ice dams from forming on the edges of your roof, which can lead to water damage inside your home.
  2. Stock up on non-perishable food and water — Stow enough food that does not need to be cooked and water for everyone in the family  Make sure you have a manual can opener, too.
  3. Don’t use a gas stove or oven for heat — During a power outage your home has less airflow. This increases the risk of carbon monoxide poisoning if you run the stove or oven continuously. Gas stoves are designed for intermittent, short-term use and don’t have all the safety features of a gas furnace.
  4. Use a wood-burning fireplace if you have one — Just make sure you have enough seasoned firewood on hand and your chimney regularly cleaned and inspected.
  5. Download our Power Outage Ultimate Checklist — It provides in-depth information about what to do before, during and after an outage. It even shows you what to do for children, pets and family members with medical needs. You can download it here.
  6. Dress in layers — Wear a polypropylene base layer, then add a warm shirt and a sweater or cardigan. Wear synthetic or wool insulated pants instead of jeans or khakis. Cotton fabric is not a good insulator. Make sure you have warm mittens, woolen socks and a knit cap also.
  7. Buy flashlights and extra batteries —Make sure you have enough for every family member. If the temperature gets too cold inside, alkaline batteries won’t perform very well. Either keep them close to your body (to keep them warm) until you need to use them or invest in some lithium-ion batteries, which perform better in the cold.
  8. Keep mobile phones charged and gas tanks full — Your phones and your vehicles are your lifelines to the outside world. If you have an EV, make sure it’s fully charged.
  9. Protect your pipes — As water freezes, it expands. This can burst the pipes in your home. Add insulation to your exposed pipes. During a power outage, you can also open each faucet to allow a slow drip. This water flow will help keep the water from freezing in the pipes.
  10. Winterproof your home — Seal doors and windows to reduce drafts so you keep as much heat indoors as possible.
  11. Invest in a whole-home standby generator — For the ultimate peace of mind, consider one of the Cummins QuietConnect™ home standby generators. In the event of a power outage, your generator will automatically switch on and keep your home powered. 
  12. Install carbon monoxide detectors with battery backups — Place them in central locations on every floor so if any carbon monoxide gets in the home, you are immediately alerted.

Power outages are always inconvenient. But winter power outages can be downright scary. To see the different ways that Cummins can help keep your family warm and cozy during a winter power outage, visit us at cummins.com/na/generators/home-standby/whole-house-and-portable or find a local dealer at cummins.com/na/generators/home-standby/find-a-dealer.

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Cummins Inc.

Cummins, a global power technology leader, is a corporation of complementary business segments that design, manufacture, distribute and service a broad portfolio of power solutions. The company’s products range from internal combustion, electric and hybrid integrated power solutions and components including filtration, aftertreatment, turbochargers, fuel systems, controls systems, air handling systems, automated transmissions, electric power generation systems, microgrid controls, batteries, electrolyzers and fuel cell products.

Cummins ICE technologies to power customer success on path to zero emissions

semi on highway through the forest

This is the first of a series of articles on powertrain technologies Cummins is looking to introduce on the path to zero emissions by 2050.


Internal combustion engine (ICE) technologies are an important transitory step for the trucking industry as Cummins pursues net-zero carbon by 2050 under its Destination Zero strategy, which is to go further, faster to reduce the greenhouse gas (GHG) and air quality impacts of its products. 

Cummins’ ICE technologies focus on advanced diesel, gas and hydrogen, which will provide clean, cost-effective power to customers in the years ahead and help Cummins achieve an interim goal of lowering emissions from newly sold products by 25% by 2030.

“Many Australian and New Zealand trucking businesses – owner-operators, small, medium and even large fleets – who are vital to both countries’ road transport efficiency into the future, will only remain in business with affordable technologies to reduce their carbon footprint,” says Mike Fowler, director and general manager of on-highway business for Cummins Asia Pacific.

He says getting to zero emissions in the heavy-duty trucking industry will not be a “light switch event” and that the pathway to the target will require some transition through lower carbon solutions while the economic, operational and infrastructure challenges of zero emission vehicles are solved.

Importantly, the industry needs multiple solutions to meet the needs of all on and off-highway customers with their variety of duty cycles and operating environments. The pace of transition will not only be driven by customer requirements but also infrastructure investment and regulatory advancements.

“There are still significant efficiency gains Cummins can achieve with diesel internal combustion technology to further reduce greenhouse gas (CO2) emissions and atmospheric pollutants,” Fowler points out.

“Heavy-duty trucking today requires the power density and operational range that only diesel internal combustion can provide,” he adds. “This is particularly relevant in Australia with its challenging operating environment.”

A new big bore Cummins diesel engine in the pipeline will further reduce carbon emissions with fuel savings of more than 10% compared with Cummins’ current X15 Euro 6 engine.

Cummins Inc. president and CEO, Jennifer Rumsey, emphasized recently that an important step in getting to net-zero was about making existing technologies more efficient.

“We can make a big difference by improving the efficiency of diesel engines in the next decade. Those products will be out there for many years beyond that. We shouldn’t just focus on zero only, we need a combination of advancing zero and improving engine-based products that we have today.”

Cummins recently announced the development of natural gas and hydrogen internal combustion engines – designated X15N and X15H – which were showcased at the Advanced Clean Transportation (ACT) Expo, North America’s largest advanced transportation technology and clean fleet event, where they attracted a lot of attention.

Debuting a clean hydrogen-burning engine is one thing. Having the fuel infrastructure in place to support it is another. The good news in Australia is that Queensland, New South Wales and Victorian state governments recently announcing collaboration on a renewable ‘green’ hydrogen refuelling network for heavy trucks on the nation’s most critical roads and highways, starting with the Hume Highway, Pacific Highway and Newell Highway.

NSW aims to have 10,000 heavy vehicles powered by green hydrogen by 2030.

Both the X15H and X15N are based on an entirely new 15-litre design which offers a weight saving of around 200 kg over the current X15 diesel engine. 

They also highlight Cummins’ new ‘fuel-agnostic’ engine platform – an industry first – which offers different versions of the same base engine. The bottom-end of the engines looks the same, while unique cylinder heads are designed to accommodate a different low or zero carbon fuel.  Each engine within the platform can run on one specific fuel using familiar internal combustion engine technology.

Hydrogen is an energy dense, carbon-free fuel and offers benefits in terms of range, payloads and fast refuelling times. The hydrogen engine itself is not completely CO2-free in that small amounts of oil in the crankcase still make their way to the combustion chamber where they’re burned, emitting a small amount of carbon through the tailpipe. NOX levels drop substantially in hydrogen combustion versus conventional diesel, by at least 75% from today’s most stringent standards.
The hydrogen engine offers performance comparable to a diesel and is virtually a drop-in replacement for a traditional engine, the major modification to a truck’s architecture being the addition of a hydrogen fuel system.

The natural gas X15N is scheduled for release in 2024 and will be offered with peak ratings of 500 hp and 1850 lb ft of torque. The engine can achieve carbon negativity when fuelled with renewable natural gas – or biogas – using methane collected from organic waste as the primary fuel source.

Premier US fleet Werner Enterprises, which is focused on reducing its carbon footprint, will begin validation and integration of the X15H and X15N in its trucks in the second half of 2022.
 

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