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Title: Gaseous hydrocarbons from flash pyrolysis of almond shells

Abstract

By use of a sand fluidized bed reactor, yields from major products from almond shells pyrolysis were measured in the 745-950/sup 0/C temperature range. A Pyroprobe 100 pyrolyzer was also used to study the influence of particle size temperature and catalysts impregnated in the almond shell samples. The highest yield of gas was obtained in the sand fluidized bed reactor, without catalyst impregnated in the almond shells, at a temperature of 890/sup 0/C and at a residence time of volatiles of ca. 2.3 s. Under these conditions, the yields of the major products are the following: 1.5% H/sub 2/, 8.3% CH/sub 4/, 4% C/sub 2/H/sub 4/, 45% CO, 28% CO/sub 2/, 0.7% C/sub 2/H/sub 6/ 0.5% C/sub 3/H/sub 6/ (weight dry basis). From the different set of experiments, it has been deduced that the production of the gaseous hydrocarbons can be explained taking into account the CO yield. The yields obtained with the fluidized bed reactor were greater than those from the Pyroprobe 100. This is due to the cracking reactions of the volatilized tars. In addition, a better heat transfer in the fluidized bed reactor has probably a certain influence.

Authors:
; ; ;
Publication Date:
Research Org.:
Div. de Ingenieria Quimica, Universidad de Alicante, Apartado 99, Alicante (ES)
OSTI Identifier:
6829489
Alternate Identifier(s):
OSTI ID: 6829489
Resource Type:
Journal Article
Journal Name:
Ind. Eng. Chem. Res.; (United States)
Additional Journal Information:
Journal Volume: 27:7
Country of Publication:
United States
Language:
English
Subject:
09 BIOMASS FUELS; 37 INORGANIC, ORGANIC, PHYSICAL AND ANALYTICAL CHEMISTRY; 04 OIL SHALES AND TAR SANDS; 42 ENGINEERING; FLUIDIZED BED REACTORS; HEAT TRANSFER; HYDROCARBONS; BIOSYNTHESIS; PYROLYSIS; CHEMICAL REACTION YIELD; TAR; CATALYTIC CRACKING; CATALYSTS; HIGH TEMPERATURE; PARTICLE SIZE; CHEMICAL REACTIONS; CRACKING; DECOMPOSITION; ENERGY TRANSFER; FUEL DISPERSION REACTORS; HOMOGENEOUS REACTORS; ORGANIC COMPOUNDS; OTHER ORGANIC COMPOUNDS; REACTORS; SIZE; SYNTHESIS; THERMOCHEMICAL PROCESSES; YIELDS 090122* -- Hydrocarbon Fuels-- Preparation from Wastes or Biomass-- (1976-1989); 400800 -- Combustion, Pyrolysis, & High-Temperature Chemistry; 040600 -- Oil Shales & Tar Sands-- Products & By-Products; 420900 -- Engineering-- Waste Processing Plants & Equipment-- (-1989)

Citation Formats

Font, R., Marcilla, A., Devesa, J., and Verdu, E. Gaseous hydrocarbons from flash pyrolysis of almond shells. United States: N. p., 1988. Web. doi:10.1021/ie00079a009.
Font, R., Marcilla, A., Devesa, J., & Verdu, E. Gaseous hydrocarbons from flash pyrolysis of almond shells. United States. doi:10.1021/ie00079a009.
Font, R., Marcilla, A., Devesa, J., and Verdu, E. Fri . "Gaseous hydrocarbons from flash pyrolysis of almond shells". United States. doi:10.1021/ie00079a009.
@article{osti_6829489,
title = {Gaseous hydrocarbons from flash pyrolysis of almond shells},
author = {Font, R. and Marcilla, A. and Devesa, J. and Verdu, E.},
abstractNote = {By use of a sand fluidized bed reactor, yields from major products from almond shells pyrolysis were measured in the 745-950/sup 0/C temperature range. A Pyroprobe 100 pyrolyzer was also used to study the influence of particle size temperature and catalysts impregnated in the almond shell samples. The highest yield of gas was obtained in the sand fluidized bed reactor, without catalyst impregnated in the almond shells, at a temperature of 890/sup 0/C and at a residence time of volatiles of ca. 2.3 s. Under these conditions, the yields of the major products are the following: 1.5% H/sub 2/, 8.3% CH/sub 4/, 4% C/sub 2/H/sub 4/, 45% CO, 28% CO/sub 2/, 0.7% C/sub 2/H/sub 6/ 0.5% C/sub 3/H/sub 6/ (weight dry basis). From the different set of experiments, it has been deduced that the production of the gaseous hydrocarbons can be explained taking into account the CO yield. The yields obtained with the fluidized bed reactor were greater than those from the Pyroprobe 100. This is due to the cracking reactions of the volatilized tars. In addition, a better heat transfer in the fluidized bed reactor has probably a certain influence.},
doi = {10.1021/ie00079a009},
journal = {Ind. Eng. Chem. Res.; (United States)},
number = ,
volume = 27:7,
place = {United States},
year = {1988},
month = {7}
}