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“Blue” hydrogen—produced through steam methane reforming (SMR) of natural gas or coal gasification, but with CO 2 capture and storage—is being described as having low or zero carbon emissions. For our default assumptions (3.5% Even if true though, the use of blue hydrogen appears difficult to justify on climate grounds.
Overview of the bluegas catalytic coal methanation process. The projects would be developed using GreatPoint’s proprietary bluegas technology, which utilizes catalytic hydromethanation to create pure hydrogen and substitute natural gas (SNG) that is pipeline-ready in a single-stage gasification process. Click to enlarge.
Technology warming potential (TWP) for three sets of natural gas fuel-switching scenarios. (A) A) CNG light-duty cars vs. gasoline cars; (B) CNG heavy-duty vehicles vs. diesel vehicles; and (C) combined-cycle natural gas plants vs. supercritical coal plants using low-CH 4 coal. Source: Alvarez et al. Click to enlarge.
Overview of the Bluegas catalytic coal methanation process. billion from Wanxiang to finance and construct the first phase of a coal-to-natural gas facility that ultimately will have an annual production capacity of one trillion cubic feet (1 Tcf) (30 billion cubic meters) per year. Click to enlarge. pure methane).
Researchers from SRI International (SRI) are developing a methane-and-coal-to-liquids process that consumes negligible amounts of water and does not generate carbon dioxide. If biogas is substituted for conventional natural gas, total GHG emissions can further significantly reduced (190 gCO 2 /mile). Lifecycle GHG comparison.
Genscape reported that January 2013 coal-fired power generation in the US surged 8.9% This increase to 140,080 GWH resulted from higher demand for electricity, higher gas prices, and lower levels of generation from nuclear plants and renewable technologies. Coal and gas had equal power sector output levels in April of last year.
In regions where the share of coal-based electricity is relatively low, EVs can achieve substantial GHG reduction, the team reports in a paper in the ACS journal Environmental Science & Technology. According to the 12 th Five-Year Plan of the China Coal Industry (2011?2015) Credit: ACS, Huo et al. Click to enlarge.
However, they also noted, high PTW efficiencies and the moderate fuel economies of current compressed natural gas vehicles (CNGVs) make them a viable option as well. The study investigated the the WTW energy and emissions from the use of natural gas in CNGVs with a range of CNGV fuel economy and natural gas compressor efficiency.
The US Department of Energy (DOE) has selected 8 research projects for funding that will focus on gasification of coal/biomass to produce synthetic gas (syngas) as a pathway to producing power, hydrogen, fuel or chemicals. will blend coal and biomass to develop a feedstock for co-gasification. Clean Coal Briquette Inc.
Australia-based underground coal gasification (UCG) company Linc Energy ( earlier post ) has signed an exclusive agreement with the UK-based alkaline fuel cell technology company AFC Energy Plc and its related company, B9 Coal ( earlier post ). A downside of AFCs has been CO 2 contamination of the electrolyte, reducing efficiency.
Comparison of coal consumption and CO 2 emissions for co-production and separate production of liquids and power. Conventional CTL plant gasifies coal to produce a syngas which is then converted in a Fischer-Tropsch reactor to products. Tags: Coal-to-Liquids (CTL) Emissions. Source: Mantripragada and Rubin.
This study incorporates the near-term global warming potential of methane leakage emissions of natural gas and natural gas-derived hydrogen pathways. Natural gas does not offer climate benefits compared to gasoline and diesel, and many biofuel pathways do not, either. Source: The ICCT.
Under van Wijk’s concept, a plant would produce methanol from natural gas on the North Slope using the proposed GigaMethanol technology. If the entire daily output of North Slope gas (4.5 Atlas uses Lurgi’s MegaMethanol technology, which allows the cost-effective production of methanol from natural gas. Source: EMRE.
(MHI) has achieved a turbine inlet temperature of 1,600 °C—which it calls the world’s highest—with the company’s advanced J-Series gas turbine. The gas turbine that marked the achievement is the 60 hertz (Hz) M501J, which MHI developed in the spring of 2009. 2 Power Station of Kansai Electric Power Co.,
billion went to traditional sources—such as coal and oil—and $2.3 billion went to carbon capture and storage, which is designed to reduce greenhouse gas emissions from coal-fired power plants. More than half the subsidies for renewables—$16.8 Of the fossil fuel subsidies, $70.2 ELI Senior Attorney John Pendergrass.
NOAA’s updated Annual Greenhouse Gas Index (AGGI), which measures the direct climate influence of many greenhouse gases such as carbon dioxide and methane, shows a continued steady upward trend. NOAA scientists created the AGGI recognizing that carbon dioxide is not the only greenhouse gas affecting the balance of heat in the atmosphere.
All large-scale energy systems have environmental impacts, and the ability to compare the impacts of renewable energy sources is an important step in planning a future without coal or gas power. Wind beats coal by any environmental measure, but that doesn’t mean that its impacts are negligible. Source: Miller and Keith (2018a).
The US Department of Energy’s National Energy Technology Laboratory (NETL) has issued a new Funding Opportunity Announcement (FOA) soliciting research projects that will address key challenges related to the utilization of coal-biomass mixtures for co-production of power and hydrogen, fuels, and/or chemicals.
Results of a lifecycle analysis by a team at the University of Michigan suggest that multiple types of natural gas-powered vehicles—i.e., Results of a lifecycle analysis by a team at the University of Michigan suggest that multiple types of natural gas-powered vehicles—i.e., —Dai and Lastoskie.
An analysis of near-term spending plans on renewables by the biggest oil and gas companies shows that real investments in renewable energy will continue to pale in comparison to capex plans for greenfield fossil fuel projects. Good case in point: Italian multinational oil and gas giant Eni S.p.A. 2 Total SA.
By comparison, 69% of steel today is made at approximately 1,600 degrees Celsius (2,912 degrees Fahrenheit) using coal, emitting about two tons of carbon dioxide for every ton of steel produced. Conversion of iron ore into iron accounts for 90% of steelmaking emissions that may be eliminated using Electra’s process.
World primary energy demand by fuel in the IEA high gas scenario. Separately, the International Energy Agency (IEA) released its own report exploring the potential for a “golden age” of gas. Both reports also emphasized that although natural gas is the lowest carbon fossil fuel, it is still a fossil fuel. Source: IEA.
Rice University researchers have determined a more effective way to use natural gas to reduce climate-warming emissions would be in the replacement of existing coal-fired power plants and fuel-oil furnaces rather than burning it in cars and buses.
This material will be used in the steelmaking process to offset other high-quality metallics that come with higher greenhouse gas emissions. Electra uses renewable energy to refine low-grade iron ores into high-purity iron through electrochemical and hydrometallurgical processes. Electra’s process results in zero carbon dioxide emissions.
Consistent comparisons between emerging technologies such as EVs and their conventional counterparts are necessary to support policy development, sound research, and investment decisions.The production phase of EVs proved substantially more environmentally intensive. Hawkins et al. Click to enlarge.
Large scale production of methanol from natural gas and coal is a well-developed. In comparison, they noted, the technology for bio-chemical ethanol production from cellulosic biomass is not sufficiently developed yet. Methanol from non-renewable coal or natural gas could be used as a bridging.
Third, the analysis offers a novel comparison of drivetrain and energy carrier production pathways based on natural resource categories. The natural gas hybrid also resulted in the lowest WTW energy demand and GHG emissions of all natural-gas based pathways evaluated. Click to enlarge. Second, it is specific to Switzerland.
SPK fuels have been certified for jet aircraft use in blends up to 50%, and can be created via two primary pathways: Gas-to-liquids (GTL). Gasification of coal, natural gas, or biomass followed by Fischer-Tropsch (F-T) synthesis of the resultant syngas, with subsequent upgrading to a product slate that includes a synthetic jet fuel.
Renault’s comparison of the carbon footprint of EV and ICE vehicles over production, operation and end of life. The publication gives the opportunity for an “apples-to-apples” comparison between the environmental impacts of the two types of powertrains: same manufacturer, same model, same boundary conditions. Click to enlarge.
Researchers at Georgia Tech have compared medium-duty (MD) electric and diesel urban delivery trucks in terms of life-cycle energy consumption, greenhouse gas (GHG) emissions, and total cost of ownership (TCO). Is the electric truck cost-effective in comparison with the diesel truck? Credit: ACS, Lee et al. Click to enlarge.
They used a lot more coal than they originally admitted to, several hundred million tons more. Another major shift is that China has become a voracious energy importer, especially of coal and liquefied natural gas. Like the United States, China has become among the world’s largest importers of oil, gas and coal.
We are beginning to get a sense of regional variation in methane emissions from natural gas production. The gas fields we studied for this paper produced about 20% of the natural gas in the United States, and more than half the shale gas, so this moves us closer to understanding methane leaks from US natural gas production.
The goal of the agreement is to reduce the greenhouse gas (GHG) emissions in the ocean transportation of sustainable wood pellets. In December 2020, MOL reached a coal transport deal with Tohoku Electric Power Co., using a coal carrier equipped with a hard sail wind power propulsion system.
Analysts at the US Department of Energy’s (DOE) National Renewable Energy Laboratory (NREL) have developed harmonized meta-analyses of lifecycle greenhouse-gas emissions from coal, wind, solar and other energy technologies. Also helping with the findings were subcontractors and researchers from the DOE’s Brookhaven National Laboratory.
The US Geological Survey (USGS) has completed a geologically-based assessment of the oil and gas resource potential of the Arctic, the Circum-Arctic Resource Appraisal (CARA). Undiscovered natural gas is three times more abundant than oil in the Arctic and is largely concentrated in Russia, the researchers concluded. Earlier post.)
Improvements are measured by contrasting anticipated CO 2 -equivalent greenhouse-gas (GHG) emissions, with those of comparable vehicles. The comparison was made with the previous-generation Wrangler Unlimited, as powered by its only available engine—FCA’s award-winning 3.6-liter tons of coal burned in a power-generation plant.
The emissions increase in the United States in 2013 (+2.5%) was mainly due to a shift in power production from gas back to coal together with an increase in gas consumption due to a higher demand for space heating. The much lower emissions increase in China of 4.2% in 2013 and 3.4%
This year has brought a significant shift in the generating cost comparison between renewable energy and fossil fuels, according to detailed analysis by technology and region, published this week by Bloomberg New Energy Finance. In the US, coal and gas are still cheaper, at $65 per MWh, against onshore wind at $80 and PV at $107.
Researchers at Wakayama University in Japan have produced a mixture of hydrogen and carbon monoxide gas by irradiating a mixture of carbon powder and distilled water with intense nanosecond laser pulses at room temperature. The generated gas was collected from the full bottle. m with diameter distribution width 3.5 ?m—much
As the share of these unconventional oil-based fuels gradually rises in the total fuel supply over time, the greenhouse gas footprint of the average fuel consumption also rises. Comparison of well-to-wheel emissions from biofuels with fossil fuels using marginal approach. g/MJ more than the current fossil comparator.
Hydrogen for reverse water gas shift reaction to avoid producing CO 2 during the process is produced by electrolyzing water, driven by solar power. For comparison, they also modeled the production of methanol using only biomass as a fuel and also using coal as source of both carbon and energy. Hertwich and Zhang (2009).
The report finds that the greenhouse gas emissions of electric vehicles, with the current EU energy mix and over the entire vehicle life cycle, are about 17-30% lower than the emissions of gasoline and diesel cars. According to the briefing, the sector’s greenhouse gas emissions have been increasing in the EU since 2014.
Comparison of Hg emissions in 2005 and 2010, by selected sector and region. Unintentional emission sectors: Coal burning, ferrous- and non-ferrous (Au, Cu, Hg, Pb, Zn) metal production, cement production. Artisanal and small-scale gold mining and coal burning are the major sources of anthropogenic mercury emissions to air.
reduction of greenhouse gas emissions by 2012 as a group, partly thanks to large emission reductions from economies in transition in the early nineties and more recent reductions due to the 2008-2009 recession, according to the report. By comparison, Chinese per capita CO 2 emissions of 6.8 Source: JRC. Click each to enlarge.
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