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Journal Article

Reducing truck diesel emissions: a status report.

About: This article is published in Automotive engineering.The article was published on 1992-01-01 and is currently open access. It has received 4 citations till now. The article focuses on the topics: Diesel particulate filter & Diesel exhaust.
Citations
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Proceedings ArticleDOI
TL;DR: In this article, a study of factors affecting hydrocarbon oxidation in a diesel oxidation catalyst was undertaken, and the objective was to determine whether interactions between particulate-adsorbed hydrocarbons and the catalyst significantly influenced hydrocar oxidation.
Abstract: A study of factors affecting hydrocarbon oxidation in a diesel oxidation catalyst was undertaken. The objective was to determine whether interactions between particulate-adsorbed hydrocarbons and the catalyst significantly influenced hydrocarbon oxidation. Theoretical modeling supported by experimental data obtained at the U.S. Bureau of Mines` Diesel Emissions Research Laboratory indicated that the mass of particles interacting with the ceramic support was negligible. Additionally, a model of hydrocarbon adsorption onto diesel particulate predicted that over 98% by mass of exhaust hydrocarbons would be gas-phase, rather than particulate-adsorbed, at converter operating temperatures. A second physical process, the diffusion of gas phase hydrocarbon to the catalytic surface, was subsequently investigated. Theoretical and experimental results for the unburnt fuel hydrocarbons indicated that hydrocarbon oxidation was diffusion limited under high temperature operating conditions. 84 refs., 16 figs., 3 tabs.

25 citations

01 Dec 1995
TL;DR: The US Bureau of Mines evaluated the performance of a catalyzed diesel particulate fiber (CDPF) and a CDPF combined with a diesel oxidation catalyst (DOC) at two metal mines.
Abstract: The US Bureau of Mines evaluated the performance of a catalyzed diesel particulate fiber (CDPF) and a CDPF combined with a diesel oxidation catalyst (DOC) at two metal mines This report describes the results from the two field evaluations The CDPF-DOC was installed on a load-haul-dump (LHD) powered by a 175-kW, prechambered, turbocharged engine This system reduced diesel particulate matter (DPM) concentrations by 71 {plus_minus} 28%, as determined by size-selective sampling with gravimetric analysis, and by 71 {plus_minus} 29%, as determined by respirable combustible dust (RCD) analysis at the vehicle operator`s location The CDPF was installed on a diesel-hydraulic, roof-bolting jumbo, powered by a 172-kW engine The CDPF reduced DPM concentrations by 72 {plus_minus} 21%, as determined by size-selective sampling with gravimetric analysis, and by 62 {plus_minus} 25%, as determined RCD analysis at the vehicle operator`s location Underground evaluation was more difficult because of frequent movement by the roof-bolting jumbo, variation in daily workload, tremendous fluctuation in ventilation airflow rates, and use of a high sulfur diesel fuel, which promotes the formation of sulfate particles, decreases filtration efficiency, and hastens the deterioration of the catalyst

2 citations

Patent
15 Oct 2014
TL;DR: In this paper, a method of making a porous ceramic body comprising mixing at least one ceramic-forming powder, at least solvent such as water, water, binder, and at least cross-linked starch present in an amount of about 20% by weight as a super addition to form a batch composition was presented.
Abstract: Disclosed herein are green bodies comprising at least one ceramic-forming powder; at least one binder; and at least one cross-linked starch present in an amount of at least about 20% by weight as a super addition. Further disclosed herein is a method of making a porous ceramic body comprising mixing at least one ceramic-forming powder, at least one solvent such as water, at least one binder, and at least one cross-linked starch present in an amount of about 20% by weight as a super addition to form a batch composition; extruding the batch composition to form a green body; drying the green body; and firing the green body to form a porous ceramic body. Also disclosed herein are methods of screening a green body for making a porous ceramic body.

2 citations

Posted ContentDOI
01 Jul 1996
TL;DR: In this paper, the economic impact of using soybean oil as a diesel fuel (soydiesel) on the U.S. and world soybean, soymea1, and soyoil markets is examined.
Abstract: This study examines the economic impact of using soybean oil as a diesel fuel (soydiesel) on the U.S. and world soybean, soymea1, and soyoil markets. Also considered are the collateral impacts on other meal and oil markets as well as on the com market. Two different scenarios of increased soyoil demand in the U.S. for soydiesel use are quantitatively analyzed using a simultaneous equations international soybean and product trade model. The results indicate that even with the highest level of assumed use of soyoil to produce soydiesel, price increases for soyoil and soybeans are small due primarily to domestic supply increases and the response of foreign producers and consumers to the resulting U.S. and world price increase. The Texas Agricultural Market Research Center (TAMRC) has been providing timely, unique, andprofessional research on a wide range ofissues relating to agricultural markets and commodities ofimportance to Texas and the nation for more than two decades. TAMRC is a market research service ofthe Texas Agricultural Experiment Station and the Texas Agricultural Extension Service. The main TAMRC objective is to conduct research leading to expanded and more efficient markets for Texas and U.S. agricultural products. Major TAMRC research divisions include International Market Research, Consumer and Product Market Research, Commodity Market Research, and Contemporary Market Issues Research. SOYDIESEL: POTENTIAL IMPACTS ON U.S. AND WORLD SOYBEAN AND SOYBEAN PRODUCT MARKETS