Air-steam gasification of sewage sludge in a bubbling bed reactor: Effect of alumina as a primary catalyst

Andrés Almeida, Juan Manuel de and Narros Sierra, Adolfo and Rodríguez Hurtado, María Encarnación (2011). Air-steam gasification of sewage sludge in a bubbling bed reactor: Effect of alumina as a primary catalyst. "Fuel Processing Technology", v. 92 (n. 3); pp. 433-440. ISSN 0378-3820. https://doi.org/10.1016/j.fuproc.2010.10.006.

Description

Title: Air-steam gasification of sewage sludge in a bubbling bed reactor: Effect of alumina as a primary catalyst
Author/s:
  • Andrés Almeida, Juan Manuel de
  • Narros Sierra, Adolfo
  • Rodríguez Hurtado, María Encarnación
Item Type: Article
Título de Revista/Publicación: Fuel Processing Technology
Date: 2011
ISSN: 0378-3820
Volume: 92
Subjects:
Freetext Keywords: Sewage sludge gasification; Primary catalyst; Bubbling fluidised bed; Gasifying agents
Faculty: E.T.S.I. Industriales (UPM)
Department: Ingeniería Química Industrial y del Medio Ambiente
Creative Commons Licenses: Recognition - No derivative works - Non commercial

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Abstract

Numerous references can be found in scientific literature regarding biomass gasification. However, there are few works related to sludge gasification. A study of sewage sludge gasification process in a bubbling fluidised bed gasifier on a laboratory scale is here reported. The aim was to find the optimum conditions for reducing the production of tars and gain more information on the influx of different operating variables in the products resulting from the gasification of this waste. The variables studied were the equivalence ratio (ER), the steam-biomass ratio (SB) and temperature. Specifically, the ER was varied from 0.2 to 0.4, the SB from 0 to 1 and the temperature from 750 °C (1023 K) to 850 °C (1123 K). Although it was observed that tar production could be considerably reduced (up to 72%) by optimising the gasification conditions, the effect of using alumina (aluminium oxide, of proven efficacy in destroying the tar produced in biomass gasification) as primary catalyst in air and air-steam mixture tests was also verified. The results show that by adding small quantities of alumina to the bed (10% by weight of fed sludge) considerable reductions in tar production can be obtained (up to 42%) improving, at the same time, the lower heating value (LHV) of the gas and carbon conversion.

More information

Item ID: 11620
DC Identifier: http://oa.upm.es/11620/
OAI Identifier: oai:oa.upm.es:11620
DOI: 10.1016/j.fuproc.2010.10.006
Official URL: http://www.sciencedirect.com/science/article/pii/S0378382010003541
Deposited by: Memoria Investigacion
Deposited on: 11 Jul 2012 07:43
Last Modified: 01 Sep 2017 17:18
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