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Factors affecting the pyrophorisity of spent bleaching clay
Author(s) -
Taylor Dennis R.,
Jenkins Dennis B.
Publication year - 1990
Publication title -
journal of the american oil chemists' society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.512
H-Index - 117
eISSN - 1558-9331
pISSN - 0003-021X
DOI - 10.1007/bf02540422
Subject(s) - differential scanning calorimetry , spontaneous combustion , charring , materials science , water content , moisture , chemistry , combustion , clay minerals , clay soil , mineralogy , pulp and paper industry , chemical engineering , composite material , environmental science , thermodynamics , soil science , geotechnical engineering , soil water , geology , organic chemistry , physics , engineering
Artificial cakes of bleaching clay/vegetable oil have been studied for their pyrophoric character using both Differential Scanning Calorimetry and a constant‐temperature, fixed‐interval, spontaneous heating (CaTFISH) test developed in this laboratory. It was determined that this is a two‐step process involving a first‐stage low‐temperature spontaneous heating reaaction followed by a second‐stage high‐temperature spontaneous heating reaction. The latter is characterized by charring and, in some cases, flaming combustion. A study of relevant variables has established that clay type, filter cake age, oil retention, moisture, and the presence of antioxidant significantly affect the spontaneous heating characteristics of clay/oil masses. Oil type was not found to be a significant variable in these studies.