Invention Grant
- Patent Title: Catalytic adsorbents obtained from municipal sludges, industrial sludges, compost and tobacco waste and process for their production
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Application No.: US15139843Application Date: 2016-04-27
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Publication No.: US09808761B2Publication Date: 2017-11-07
- Inventor: Teresa J. Bandosz
- Applicant: Research Foundation of the City University of New York
- Applicant Address: US NY New York
- Assignee: RESEARCH FOUNDATION OF THE CITY UNIVERSITY OF NEW YORK
- Current Assignee: RESEARCH FOUNDATION OF THE CITY UNIVERSITY OF NEW YORK
- Current Assignee Address: US NY New York
- Agency: Troutman Sanders LLP
- Main IPC: B01D53/40
- IPC: B01D53/40 ; B01D53/86 ; B01J20/24 ; B01D53/02 ; B01D53/50 ; B01D53/52 ; B01D53/54 ; B01D53/56 ; B01J20/02 ; B01J20/04 ; B01J20/06 ; B01J20/08 ; B01J20/10 ; B01J20/20 ; B01J20/30 ; B01J20/34 ; B01J31/26 ; B01J20/22 ; B01J21/02 ; B01J23/00 ; B01J23/06 ; B01J23/72 ; B01J23/745 ; B01J20/28 ; B01D53/04

Abstract:
Industrial waste derived adsorbents were obtained by pyrolysis of sewage sludge, metal sludge, waste oil sludge and tobacco waste in some combination. The materials were used as media to remove hydrogen sulfide at room temperature in the presence of moisture. The initial and exhausted adsorbents after the breakthrough tests were characterized using sorption of nitrogen, thermal analysis, XRD, ICP, and surface pH measurements. Mixing tobacco and sludges result in a strong synergy enhancing the catalytic properties of adsorbents. During pyrolysis new mineral phases are formed as a result of solid state reaction between the components of the sludges. High temperature of pyrolysis is beneficial for the adsorbents due to the enhanced activation of carbonaceous phase and chemical stabilization of inorganic phase. Samples obtained at low temperature are sensitive to water, which deactivates their catalytic centers.
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