Affordable Access

Publisher Website

Physical characterization of pyrolyzed tobacco and tobacco components

Authors
Journal
Journal of Analytical and Applied Pyrolysis
0165-2370
Publisher
Elsevier
Publication Date
Volume
66
Identifiers
DOI: 10.1016/s0165-2370(02)00114-6
Keywords
  • Tobacco
  • Cellulose
  • Pectin
  • Lignin
  • Char
  • Pyrolysis
  • Scanning Electron Microscopy
  • Tem
  • Graphite

Abstract

Abstract Morphological changes in pyrolyzed tobacco and components of tobacco, i.e. cellulose, pectin, and lignin, at temperatures ranging from 250 to 750 °C in helium were characterized by scanning electron microscopy, energy dispersive X-ray spectroscopy, and surface area with N 2 BET. Tobacco and pectin char were also characterized by high-resolution transmission electron microscopy. Changes in tobacco included the separation and degradation of the cuticle layer, the formation of inorganic precipitates, formation of a melt phase, volatile gas and vesicle formation, and surface etching. The carbon matrix of tobacco ranged from a homogeneous amorphous character at lower temperatures to a heterogeneous, mixed micro-crystalline structure at high temperatures with domains of graphene sheets, fullerenes, and graphite. Xylem elements that were dissected from burley tobacco stems formed a melt/liquid phase and precipitates of inorganic salts. Individual, single components such as Avicel cellulose, alkali lignin, and citrus pectin were used to simulate components found in tobacco. Avicel cellulose formed a melt phase and vesicles. Pectin formed a melt/liquid phase at 250 °C followed by vesicle formation, surface etching, inorganic precipitate formation, and condensate formation of carbonaceous materials. The micro-crystalline structure of pectin ranged from amorphous at low temperatures to graphene sheets at high temperatures. In pyrolyzed lignin, changes included the formation of a melt/liquid phase, vesicles, and precipitates of inorganic salts and the occurrence of surface etching.

There are no comments yet on this publication. Be the first to share your thoughts.

Statistics

Seen <100 times
0 Comments

More articles like this

Primary chemical and physical characterization of...

on Ecotoxicology and Environmenta... Jan 01, 1992

Primary chemical and physical characterization of...

on Ecotoxicology and Environmenta... October 1992

[Components of tobacco smoke].

on Italian heart journal : offici... April 2001
More articles like this..