Pyrolysis of Coal and Shale

Pyrolysis of Coal and Shale

“…As a result of a study of the chemistry of macromolecules Poncins (194) has related the thermal deterioration of these molecules to changes occurring during coking, and to the chemical constitution of the resulting tars and pitches. Rakovskii and Makarov have continued their investigation of the formation of coal tar during pyrolysis, as reported in the previous unit processes review (196). In their latest paper (199) they show that catalytic processes on the coke surface, as well as a reaction of primary tar with the gaseous environment, are responsible for high temperature tar formation.…”

“…By determining the plastic properties of coals by the Gieseler plastometer, and by using correlative data from a movable-wall oven, Russell (215) has been able to correlate laboratory data with full-scale "coking property." The use of dispersing agents, such as anthracene oil, to improve coal cokability, an extension of studies reported in both previous unit processes reviews (196), is described by Onusaitis (181). The development of a new experimental oven for studying coal blending is mentioned by Reed (202).…”

Pyrolysis of Coal and Shale

“…A distribution system and other improvements in under-jet ovens are the subject of several British patents (149,214). For additional new horizontal and vertical oven designs see (86,87,198,196).…”

“…As stated in the previous review' (198), the pyrolysis of shale has, up to the present time, been primarily directed toward the direct recovery of petroleumlike hydrocarbons. This is in contrast to coal pyrolysis, where metallurgical coke, gaseous fuels, or fuel coke for conversion thereto are the major products sought.…”

“…The period spanned by the references given below is essentially that since the previous review (198), except for inadvertent omissions resulting from the unavailability of certain papers, or from the normal lag encountered in abstracting services. Due to space limitations, only the more important papers of the past year have been selected for mention from the voluminous literature of the period.…”