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Coal pyrolysis in a continuous fluidized bed - process development studies

Journal Article:

Abstract

The paper deals with the development of a process development unit (PDU) for the fluid bed pyrolysis of non-caking slack coal obtained from Singareni and Talcher coalfields. Preheated air is used as the fluidizing medium. It is necessary to avoid its maldistribution by a suitable design of the gas distributor. In this regard perforated conical distributors appear to play an important role. In the low temperature carbonization of coal an operation around 500 C gives optimum yields of char and tar of desirable quality. Carbonization reactions are generally completed within about 20 min of the feed entry into the fluidized bed and the char attains an equilibrium volatile matter content. Since air is used as the fluidizing medium carbonization gas is diluted with nitrogen and non-combustibles. The heating value of the gas is low. (5 refs.)
Publication Date:
Oct 01, 1981
Product Type:
Journal Article
Reference Number:
EDB-82-136281
Resource Relation:
Journal Name: J. Inst. Eng. (India), Part CH; (India); Journal Volume: 62:CH1
Subject:
01 COAL, LIGNITE, AND PEAT; COAL; PYROLYSIS; CARBONIZATION; CHARS; COAL TAR; DESIGN; FLUIDIZED BED; INDIA; OPERATION; PROCESS DEVELOPMENT UNITS; QUANTITATIVE CHEMICAL ANALYSIS; YIELDS; ASIA; CARBONACEOUS MATERIALS; CHEMICAL ANALYSIS; CHEMICAL REACTIONS; DECOMPOSITION; DEVELOPING COUNTRIES; ENERGY SOURCES; FOSSIL FUELS; FUELS; FUNCTIONAL MODELS; MATERIALS; ORGANIC COMPOUNDS; OTHER ORGANIC COMPOUNDS; PYROLYSIS PRODUCTS; TAR; THERMOCHEMICAL PROCESSES; 010406* - Coal & Coal Products- Pyrolysis & Cracking- (-1987); 010401 - Coal & Coal Products- Carbonization- (-1987)
OSTI ID:
5178974
Country of Origin:
India
Language:
English
Other Identifying Numbers:
Journal ID: CODEN: JECEA
Submitting Site:
HEDB
Size:
Pages: 1-5
Announcement Date:
Jul 01, 1982

Journal Article:

Citation Formats

Ramakrishnan, N N, Akmal, M A.K., and Vaidyeswaran, R. Coal pyrolysis in a continuous fluidized bed - process development studies. India: N. p., 1981. Web.
Ramakrishnan, N N, Akmal, M A.K., & Vaidyeswaran, R. Coal pyrolysis in a continuous fluidized bed - process development studies. India.
Ramakrishnan, N N, Akmal, M A.K., and Vaidyeswaran, R. 1981. "Coal pyrolysis in a continuous fluidized bed - process development studies." India.
@misc{etde_5178974,
title = {Coal pyrolysis in a continuous fluidized bed - process development studies}
author = {Ramakrishnan, N N, Akmal, M A.K., and Vaidyeswaran, R}
abstractNote = {The paper deals with the development of a process development unit (PDU) for the fluid bed pyrolysis of non-caking slack coal obtained from Singareni and Talcher coalfields. Preheated air is used as the fluidizing medium. It is necessary to avoid its maldistribution by a suitable design of the gas distributor. In this regard perforated conical distributors appear to play an important role. In the low temperature carbonization of coal an operation around 500 C gives optimum yields of char and tar of desirable quality. Carbonization reactions are generally completed within about 20 min of the feed entry into the fluidized bed and the char attains an equilibrium volatile matter content. Since air is used as the fluidizing medium carbonization gas is diluted with nitrogen and non-combustibles. The heating value of the gas is low. (5 refs.)}
journal = {J. Inst. Eng. (India), Part CH; (India)}
volume = {62:CH1}
journal type = {AC}
place = {India}
year = {1981}
month = {Oct}
}