Bitumens Asphalts And Tar Sands

Bitumens, asphalts, and tar sands

La Brea Tar Pits once trapped prehistoric mammals. Today that killer has a chemical cousin in the Athabasca oil sands of Alberta, Canada--immense deposits of natural asphalt destined for upgrading to synthetic crude oil. If the harvesting of this natural asphalt continues unabated, we might find ourselves stuck in a muck of a different kind. Humanity has used asphalt for thousands of years. This humble hydrocarbon may have glued the first arrowhead to the first shaft, but the changes wrought by this material are most dramatic since its emergence as pavement. Since the 1920s the automobile and blacktop have allowed unprecedented numbers of Americans to experience the beauty of their continent from the Adirondacks to the Rockies and beyond, to Big Sur and the Pacific Coast Highway. Blacktop roads, runways, and parking lots constitute the central arteries of our environment, creating a distinct "political territory" and a "political economy of velocity." In Asphalt: A History Kenneth O'Reilly provides a history of this everyday substance. By tracing the history of asphalt--in both its natural and processed forms--from ancient times to the present, O'Reilly sets out to identify its importance within various contexts of human society and culture. Although O'Reilly argues that asphalt creates our environment, he believes it also eventually threatens it. Looking at its role in economics, politics, and global warming, O'Reilly explores asphalt's contribution to the history, and future, of America and the world.

Covers the research - private, scholarly, and government - that went into developing the oil sands.

This is the first volume of a two-volume set of critical reviews of many aspects of both asphaltenes and asphalts and their interrelationship. Asphaltene is invariably present in asphalt or bitumen and other fossil fuel-derived liquids such as coal tar, coal liquefaction products, pyrolyzed shale oil from oil shales, source rock extracts and numerous naturally occurring bituminous substances. The latter include asphaltites, asphaltoids, waxes, and carbonaceous deposits containing a composition of petroleum and coal. The contents cover not only the basic science of asphaltene but also deal with the applications and technology such as upstreams (production, recovery) and down streams (refining, upgrading) of petroleum, and the paving technology and formulation preparation. The main features of the book are: it provides an up-to-date, in-depth review of every aspect of asphaltenes and asphalts; it spans five decades of research and technology of heavy fractions of petroleum; it presents a global view of asphaltene related to exploration production, refining and upgrading. The book will be welcomed as a valuable reference source for petroleum companies, research institutes, refineries, universities and also by individuals dealing with the production, origin, formation, engineering, conversion and catalysis of heavy oil, tar sands and other bitumens materials.

This volume of the IARC Monographs provides evaluations of the carcinogenicity of bitumens and their emissions, the N-heterocyclic polycyclic aromatic hydrocarbons benz[a]acridine, benz[c]acridine, dibenz[a,h]acridine, dibenz[a,j]acridine, dibenz[c,h]acridine, carbazole and 7H-dibenzo[c,g]carbazole, as well as the S-hetrocyclic polycyclic aromatic hydrocarbons benzo[b]naphtho[2,1-d]thiophene and dibenzothiophene. Bitumens are produced by distillation of crude oil during petroleum refining, and also occur naturally. Bitumens can be divided into six broad classes, according to their physical properties and specifications required for different applications. The major use (about 80%) of bitumens is for road paving; other uses include roofing, waterproofing, sealing and painting. The term "bitumen" should not be confused with "asphalt", which refers to the mixture of bitumen (4-10% by weight), small stones, sand and filler used for road paving. Bitumens are complex mixtures that contain a large number of organic chemical compounds. Application of bitumens may generate emissions (fumes and vapours) that may contain, among volatile and non-volatile compounds, a number of known or probable carcinogens. An IARC Monographs Working Group reviewed epidemiological evidence, animal bioassays, and mechanistic and other relevant data to reach conclusions as to the carcinogenic hazard to humans of various occupations that entail exposure to bitumens and bitumen emissions, including road paving, roofing, and application of mastic asphalt, and to various heterocyclic polycyclic aromatic compounds.