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A new study by a team from Environmental Health & Engineering (EH&E) has found that greenhouse gas emissions from corn ethanol are 46% lower than those from gasoline—a decrease in emissions from the estimated 39% done by previous modeling. gCO 2 e/MJ) which is 46% lower than the average carbon intensity for neat gasoline.
The PODA model is a machine-learning-based model to project the US gasoline demand using COVID-19 pandemic data, government policies and demographic information. The Motor Gasoline Demand Estimation Module quantifies motor gasoline demands due to the changes in travel mobility.
Low-speed electric vehicles (LSEVs) could reduce China’s demand for gasoline and, in turn, impact global oil prices, according to a new issue brief by an expert in the Center for Energy Studies at Rice University’s Baker Institute for Public Policy. “
Environmental impacts of gasoline and E85. previous studies have followed the general framework of life cycle assessment (LCA), they have focused almost exclusively on quantifying the energy balance and GHG emissions associated with biofuels production. Error bar shows regional variations for E85. GW = global warming; Eut.
Based on visual interpretation of high-resolution (30 m) satellite images, a new study in the journal Global Change Biology: Bioenergy determined that industrial plantations covered over 3.1 When peat swamps are drained for agriculture, the peat begins to decompose, and is an enormous source of carbon emissions. Earlier post.).
Now, researchers at Imperial College London have shown that bioethanol production from bamboo in China is both technically and economically feasible, as well as cost-competitive with gasoline. An open access paper on their study is published in Biotechnology for Biofuels. —Littlewood et al. Littlewood et al. Click to enlarge.
The federal subsidy significantly favors larger battery packs to a stronger degree than their potential for additional gasoline savings. air emissions and oil displacement benefits) in the near term per dollar spent than PHEVs and battery-electric vehicles (BEVs) with large battery packs providing longer electric range. Earlier post.).
Average values for WTW GHG emissions for oil sands and other crudes, tight boundary. When the oil sands products refined in the United States are considered—a mixture of oil sands and lower-carbon blending components—the GHG emissions are, on average, 9% higher than the average crude processed in the US.
The effects of gasoline ratio on indicated thermal efficiency of HCII and GDBF modes. Researchers at Tsinghua University have compared the combustion and emissions characteristics of two dual-fuel (diesel-gasoline) modes intended to integrate the advantages of both fuels to achieve high thermal efficiency and low emission targets.
In early 2020, UK-based independent testing firm Emissions Analytics published a study claiming that tire particulate wear emissions were 1,000 times worse than exhaust emissions ( earlier post ). As testament to the filtration efficiency of the latest gasoline particulate filters (GPFs), tailpipe mass emissions are now as low as 0.02
Building on its capability of proactive transformation, Neste has initiated a strategic study on transitioning its refinery in Porvoo, Finland to non-crude oil refining and into a globally leading renewable and circular solutions site. Neste will also continue to actively study opportunities of green hydrogen at its Porvoo refinery.
Well-to-wheel (WTW) greenhouse gas emissions for in situ SAGD and surface mining pathways generated employing GHOST/TIAX/ GHGenius combination and comparison with SAGD, mining and conventional crude oil literature pathways (all results are on a HHV basis). 74% of WTW emissions in our oil sands pathways. Credit: ACS, Bergerson et al.
Comparison plot showing mass fractions (F m ) of chemically characterized components of lubricating oils and POA. Unburned diesel fuel makes an additional smaller contribution, with an additional smaller contribution from unburned gasoline. 3 ), and SAE-10W30 and SAE-15W40 lubricating oils. Credit: ACS, Worton et al.
A team from the University of Tennessee and the National Renewable Energy Laboratory (NREL) has the fuel savings due to fuel economy improvements over the past 43 years amount to approximately two trillion gallons of gasoline. gasoline demand would have put upward pressure on world oil prices.
Neste Oil—the world’s largest producer of renewable diesel—has launched the commercial production and sales of renewable naphtha for corporate customers; the company is one of the first to supply bio-naphtha on a commercial scale. vegetable oils) to green fuels (the core of the NExBTL process), Sotelo-Boyás et al.
Renault recently made public the findings of an internal study, published first in October 2011, detailing and comparing the lifecycle assessments (LCAs) of the battery-electric and two internal combustion engined versions (gasoline and diesel) of the Renault Fluence. Gasoline Fluence 16V. Click to enlarge. Diesel Fluence dCi.
A new study by a team at the National Renewable Energy Laboratory (NREL) concludes that a high-pressure, scalable, intra-city hydrogen pipeline system could improve the economics and logistics of hydrogen delivery, making it potentially cost-competitive with gasoline. kg—approximately equivalent to a gasoline cost of $2.7/gal
High-density polyethylene (HDPE) grocery bags can be successfully pyrolyzed to alternative diesel fuel, according to a new study by a team from the Illinois Sustainable Technology Center (ISTC) at the University of Illinois, Urbana-Champaign and the United States Department of Agriculture (USDA) Agricultural Research Service ARS. Brajendra K.
The study considers five different powertrains (internal combustion engine, hybrid-electric, plug-in hybrid-electric, fuel-cell-electric, and battery-electric) and 12 cost components (purchase cost, depreciation, financing, fuel, insurance, maintenance, repair, taxes, registration fees, tolls and parking, payload capacity and labor).
Full-fuel-cycle GHG emissions estimates for reformulated gasoline pathways by LCA study. Nominal value of 70 g CO 2 /MJ for combustion emissions is applied evenly across all studies. He found that the variation in oil sands GHG estimates is due to a variety of causes. Credit: ACS, Brandt 2012. Click to enlarge.
A team at the University of Idaho has demonstrated that glycerol, a byproduct from biodiesel production, could be used as a substrate for producing drop-in gasoline-range biofuel. The technology of converting methanol into gasoline was discovered and commercialized more than 3 decades ago. Tropsch synthesis (FTS).
A new study by researchers from Stockholm University concludes that automobile tires may be a potential previously unknown source of carcinogenic dibenzopyrenes—a type of high molecular weight polycyclic aromatic hydrocarbon (PAH)—to the environment. 20% mineral oils such as extender oils/ softeners.
A new study finds that as much as 20–30% of the number of vehicle engine exhaust particles larger than 3 nm may be formed during engine braking conditions—i.e., The study also indicates that the particles were non-volatile, formed before the catalyst, and originating from engine oil. Credit: ACS, Rönkkö et al.
Results of their study, which appear in the ACS journal Environmental Science & Technology , suggest that refinery and product-specific efficiency values are sensitive to crude quality; seasonal and regional factors; and refinery configuration and complexity—which in turn are determined by final fuel specification requirements and regulations.
At the current pace of research and development, replacing gasoline and diesel with renewable fuel alternatives could take some 131 years, according to a new University of California, Davis, study using a new sustainability forecasting approach based on market expectations. The forecast was published online 8 Nov.
In part-load operation, the indirect injection supplements direct gasoline injection to improve fuel economy and to reduce the output of particulates from the engine. Still, the study found, the lowest emitting stoichiometric GDI vehicle exceeded the diesel Euro 5 limit (6×10 11 #/km) by more than 100%. Earlier post.). Earlier post.)
Scientists from ExxonMobil, the Georgia Institute of Technology and Imperial College of London have published in the journal Science joint research on potential breakthroughs in a new membrane technology that could reduce emissions and energy intensity associated with refining crude oil. —Thompson et al.
A chemical analysis indicates that the source of oil sheens recently found floating at the ocean’s surface near the site of the Gulf of Mexico Deepwater Horizon oil spill is pockets of oil trapped within the wreckage of the sunken rig. The results are published this week in the journal Environmental Science & Technology.
The study found that some of the CO 2 savings made during the use of low carbon vehicles is offset by increased emissions created during their production, and to a lesser extent, disposal. Standard gasoline vehicle. —Greg Archer, LowCVP Managing Director. Vehicle Whole Life Carbon Emissions Analysis. Estimated lifecycle.
Gasoline section shows results for fuel derived from both conventional oil and oil sands. The study found that shale gas (SG) well completion and workover emissions are a much more significant factor as compared to a conventional natural gas (NG) pathway. Expansion bars show the components of fuel production.
Contribution of gasoline and diesel exhaust to SOA over 0% to 50% diesel fuel use. The study determined that, depending on a region’s fuel use, diesel exhaust is responsible for 65% to 90% of vehicular-derived SOA, with substantial contributions from aromatic and aliphatic hydrocarbons. Gentner et al. Click to enlarge. Earlier post.).
A study by European researchers has found that two-stroke (2S) scooters, although constituting a small fraction of the fleet, can dominate urban vehicular pollution through organic aerosol and aromatic emission factors up to thousands of times higher than from other vehicle classes. —Platt et al. Platt et al. Click to enlarge.
An analysis of the US refining sector, based on linear programming (LP) modeling, finds that refining plausibly high volumes of Canadian oil sands crudes in US refineries in 2025 would lead to a modest increase in refinery CO 2 emissions (ranging between 5.4% The study published in ES&T was funded by Chevron Energy Technology Company.
A new study on greenhouse gas (GHG) emissions associated with the conversion and degradation of peatland in palm oil plantations in Southeast Asia has determined that past studies have generally significantly underestimated emissions associated with palm oil grown on peatland.
Bio-oil-graded upgrading route based on molecular distillation and catalytic cracking. A team at Zhejiang University, China, has developed a novel cracking technology for the upgrading of bio-oil, produced by the fast pyrolysis of biomass, to biogasoline. wt %; the hydrocarbon content in this gasoline phase was 98.3%.
Researchers in China report the production of gasoline and diesel from coal tar via an optimized catalytic hydrogenation using two serial fixed beds, the first with a hydrofining catalyst of MoNi/?-Al of the total consumption volume in 2009, followed by carbon black raw oil sharing 28.1% Flow diagram of coal tar hydrogenation process.
A new study concludes that using ethanol can be a cost-effective approach to increasing the octane rating of the US gasoline pool. A number of studies recently have pointed out that increasing the octane rating of the US gasoline pool (currently ?93 10% for 100-RON E30) and (ii) reduce crude oil use (e.g., ?
The price disparity between crude oil and other resources, coupled with the emergence of cheap and abundant shale gas, especially in the United States, is opening up opportunities to produce cheaper gasoline, according to a new report from Lux Research. Among their findings: Methanol-to-gasoline is the cheapest option.
A study by a team from North Carolina State University, with colleagues from the Urban Air Initiative and 3DATX Corporation, has shown that non-FFVs (flexible-fuel vehicles) can adapt to a mid-level ethanol blend—specifically E27. The study was commissioned by the Urban Air Initiative. — lead researcher Dr. Chis Frey.
In working to elucidate the chemistry of hydrodeoxygenation (HDO) for the catalytic upgrading of pyrolytic bio-oil to fuel-grade products, researchers at Pacific Northwest National Laboratory (PNNL) have discovered that water in the conversion process helps form an impurity which, in turn, slows down key chemical reactions.
Researchers at SK Innovation, South Korea’s largest oil refiner, performed a comprehensive study evaluating the performance of biobutanol-blended gasoline in passenger cars. This study shows that biobutanol is one of the best alternative bioalcohol fuels for use in the near future. —Kim et al. SK Energy Co.
Methanol-to-gasoline process flow diagram. The resulting methanol would be blended with crude and transported via the trans-Alaska oil pipeline to Valdez, where it would be extracted from the oil and processed via Methanol-to-Gasoline technology into gasoline. Gasoline could be delivered from Valdez at $2.65
The results of this open-access study are published in the International Journal of Energy and Environmental Engineering. A Greyrock Flare Gas-to-Fuels conversion process at an Ohio oil well was used as the base case for this LCA. This fuel comprises 8,694 and 2,313 L/day of synthetic diesel and synthetic gasoline, respectively.
Block flow diagram for the production of gasoline from lignocellulosic biomass by aqueous phase hydrodeoxygenation of a solution produced by the hydrolysis of biomass. The highest gasoline yield from this two-stage process was obtained from the stream produced by acid hydrolysis of maple wood with 0.5 Click to enlarge.
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