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Effect of pyrolysis temperature and time on catalytic performance of sewage sludge/industrial sludge-based composite adsorbents

Paper ID Volume ID Publish Year Pages File Format Full-Text
48938 46531 2006 9 PDF Available
Title
Effect of pyrolysis temperature and time on catalytic performance of sewage sludge/industrial sludge-based composite adsorbents
Abstract

Adsorbents for removal of hydrogen sulfide from moist air were prepared from sewage sludge, waste oil sludge and their 50:50 mixture by pyrolysis at 650 and 950 °C for either half an hour or an hour. The resulting materials were characterized using sorption of nitrogen, thermal analysis, pH measurements and X-ray diffraction. Their catalytic performance was evaluated in hydrogen sulfide reactive adsorption via a dynamic test. The adsorbents have high capacity for hydrogen sulfide removal and high selectivity for its conversion to elemental sulfur. That sulfur is stored in the pore system, mainly mesopores. In some cases, after the oxidation, a secondary pore system is formed within the deposited sulfur. Either the capacity or selectivity depends on the pyrolysis temperature, time, and the specific chemistry of the sludge precursors. They govern the development of porosity and formation of new mineral-like catalytic components through solid-state reaction.

Keywords
Sewage sludge; Industrial sludge; Pyrolysis; Adsorbents; Hydrogen sulfide; Catalytic activity
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Effect of pyrolysis temperature and time on catalytic performance of sewage sludge/industrial sludge-based composite adsorbents
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Publisher
Database: Elsevier - ScienceDirect
Journal: Applied Catalysis B: Environmental - Volume 67, Issues 1–2, 11 September 2006, Pages 77–85
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Catalysis
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Price was $35.95
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