chemical engineering thermodynamics pdf tables

Such information was critically important to the development of new refinery technologies that were vital during World War II. The purpose of that project was to obtain information on thermodynamic and thermophysical properties of selected hydrocarbons and their sulfur-containing derivatives. Rossini, Chief of the Section on Thermochemistry and Hydrocarbons at the National Bureau of Standards (NBS), to undertake American Petroleum Institute (API) Research Project 44. The Thermodynamics Research Center (TRC) was founded in 1942 by Dr. Here, we describe a major effort to transfer the results of this project into the form of on-line accessible, searchable database, making this information readily and conveniently available to users worldwide. The TRC Thermodynamic Tables project is one of the oldest of its kind and has provided printed tables of high-quality, critically evaluated thermophysical and thermochemical data for over 65 years. Merely having a scanned page with the table from a reference book is clearly not enough: the numerical data have to be reproduced very accurately and to have all associated metadata information (i.e., parameters and conditions uniquely defining the system) available for indexed searches. Although scientific and engineering data represent a relatively small fraction of all printed information, the requirements on their digital delivery are disproportionately high. Processing with Optical Character Recognition (OCR) technology also allows indexing and, therefore, searches of scanned texts. One of the most visible examples of this process is an ongoing Google Books project aimed to create a massive on-line library of scanned books. Major efforts are being made today to bring printed information to an electronic form. Consequently, much of this information still exists in the form of “old” media, i.e., printed pages. For any mature field (such as thermodynamics), significant amounts of data were collected and critically evaluated over many years, long before modern advances in information technology. However, for older, more “traditional” data compilations, the transition to electronic data delivery poses significant challenges. One of the best examples of this effective combination is the NIST Chemistry WebBook that started in the mid-1990s and has proven to be very successful. The second component is the efficient means of information delivery, and, in today’s world, it is indisputably the Internet. In terms of current technology, this solution usually comes in the form of an electronic database. First, an efficient information storage and retrieval mechanism must be established. To provide this availability, two major components have to be in place. On-demand availability of thermophysical and thermochemical property data has become essential to sustain rapid technological development in the modern world. WTT are distributed through the NIST Standard Reference Data Program. Various search options and data plotting capabilities are provided via the Web interface. The tabulated information includes critical properties, vapor pressures and boiling temperatures, phase transition properties, volumetric properties, heat capacities and derived properties, transport properties, reaction state-change properties, as well as index of refraction, surface tension, and speed of sound. Presently, WTT contains data for 7838 compounds and over 950,000 evaluated data points.

To facilitate more flexible, convenient, and up-to-date access to the data, here, we present the release of the on-line version of the TRC tables, Web Thermo Tables (WTT). Over their long history, the TRC Tables have always been valued as a reputable source of evaluated thermophysical and thermodynamic data. For over 65 years, the Thermodynamics Research Center (TRC) has been publishing tables of critically evaluated data covering physical and thermodynamic properties of pure compounds, TRC Tables-Hydrocarbons and TRC Tables-Non-Hydrocarbons. It has long been understood that availability of thermophysical and thermochemical property data is vital to scientific research and industrial design.

Chemical engineering thermodynamics pdf tables