Open AccessLaser Pyrolysis of CH3Br
Author(s) -
Hua Chang,
Jang Ching Hsieh
Publication year - 1993
Publication title -
laser chemistry
Language(s) - English
Resource type - Journals
eISSN - 1026-8014
pISSN - 0278-6273
DOI - 10.1155/1993/48493
Subject(s) - pyrolysis , chemistry , raman spectroscopy , laser , carbon fibers , decomposition , irradiation , analytical chemistry (journal) , substrate (aquarium) , photochemistry , thermal decomposition , spectroscopy , organic chemistry , materials science , optics , nuclear physics , quantum mechanics , composite number , composite material , physics , geology , oceanography
Laser pyrolysis of CH 3 Br by a strong laser irradiation was studied in this work. Besides a fine needle ofsolid carbon was deposited at the surface on the substrate, HBr and CH 4 , were found as gaseous productswith a ratio of 2:1. Small amount of C 2 H 2 was also detected. The variation in the pressures of CH 3 Br,HBr and CH4 were measured by Raman spectroscopy. It indicated that the decomposition of CH 3 Br wasfirst order with respect to CH 3 Br. The reaction mechanism of the laser pyrolysis was suggested as follows:After gaining enough energy at the hot spot, CHaBr was pyrolyzed to produce HBr and CH 2 which thenreacted with CH 3 Br to form CH 4 , and solid carbon.
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