scispace - formally typeset
Search or ask a question
Author

W. F. Marshall

Bio: W. F. Marshall is an academic researcher from United States Department of the Interior. The author has contributed to research in topics: Compounds of carbon & Diesel exhaust. The author has an hindex of 1, co-authored 1 publications receiving 7 citations.

Papers
More filters

Cited by
More filters
Journal ArticleDOI
01 Jul 1995-Fuel
TL;DR: In this article, 22 equations for predicting the cetane number of diesel fuels were tested for accuracy by comparing the predicted values for > 500 fuels with the measured values, and it was concluded that it is unlikely that the standard error can be reduced significantly below 1.5, because the measured Cetane numbers are themselves subject to experimental error.

48 citations

Proceedings ArticleDOI
01 Feb 1973

15 citations

Proceedings ArticleDOI
01 Feb 1974
TL;DR: The results of a public opinion survey on testing of diesel exhaust odors conducted during 1969 and 1970 as mentioned in this paper showed that a relationship existed between perceived diesel exhaust odor intensity and the objectionability of these odors.
Abstract: This paper describes the results of a public opinion survey on testing of diesel exhaust odors conducted during 1969 and 1970. Major goals of the research were to relate public opinion of the odors and the objectionability associated with them to odor intensity, and to obtain a dose-response curve as the primary result. It was found that a relationship existed between perceived diesel exhaust odor intensity and the objectionability of these odors. The nature of this relationship was that increasingly intense diesel exhaust odors were considered increasingly objectionable.

3 citations

Proceedings ArticleDOI
TL;DR: In this article, a set of studies on the feasibility of using low-temperature pyrolysis to obtain liquid fuel materials from coal that do not require extensive, costly upgrading is presented.
Abstract: Raw oils generated by low-temperature coal pyrolysis were chemically characterized and subjected to tests in three diesel engines of different configuration. The coal liquids were tested as blends with conventional No. 2 diesel fuels, the coal liquids being 20-25% by volume. These tests were performed in support of a broader set of studies on the feasibility of using low-temperature pyrolysis to obtain liquid fuel materials from coal that do not require extensive, costly upgrading. Determination of physical and chemical properties of the pyrolysis liquids indicated a higher hydrogen/carbon ratio and lower aromaticity than typical SCR II and EDS middle distillates. Combustion tests were performed in both direct- and indirect-injection engines at three sites. The results were highly variable, the addition of the oil showing no effect on emissions and performance in some cases, reduced emissions on one engine, and increased emissions in other cases. The results are discussed with reference to prior related work.

3 citations