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You searched for subject:(regenerative desulfurization). Showing records 1 – 2 of 2 total matches.

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University of Illinois – Urbana-Champaign

1. Behl, Mayank. Electrospun nanofibrous metal oxides as regenerable adsorbents for desulfurization of biomass-derived syngas.

Degree: MS, 0300, 2011, University of Illinois – Urbana-Champaign

Gasification of biomass residue, a thermochemical conversion process, is fast becoming an attractive method of syngas production by extracting energy from the non-food based biomass feedstocks. Unlike the more popular biochemical processes, like fermentation of cellulosic biomass, it can operate with a wide range of biomass-feedstock in terms of feed???s quality and consistency, thus expanding the available pool of feedstock and thereby reducing the overall costs. Moreover, by doing almost complete depolymerization of the source biomass to useful gaseous products like syngas, gasification currently is the only established technology that can theoretically make the most of the energy stored in the raw biomass. However, on gasification, along with the syngas, gaseous impurities like sulfur containing species (H2S, COS), ammonia, alkali oxides, halides etc are also generated due to the volatile contaminants present in the biomass residue. Many downstream processes, like Fischer Tropsch synthesis, Solid Oxide Fuel Cells and methanol production, use catalysts that have little tolerance with gaseous contaminants. Transition metal / metal oxide catalysts, typically employed for such value-addition processes, are especially vulnerable to sulfur containing gaseous species like hydrogen sulfide. Therefore, before this raw syngas can be used for different downstream applications, it needs to be cleaned. Among the different processes used for H2S removal, wet amine scrubbing has been the most popular. However, such wet processes require comparatively low operating temperatures (35 - 55???C). The cleaned syngas has to be subsequently reheated for the downstream processes (300 - 800???C). Such consecutive cooling and heating can cause considerable thermal losses. To avoid such energy losses, it is important to desulfurize the gas stream at suitably high temperatures. A solid-phase sulfur-sorbent material that has a high reactivity, good structural stability, and easy regenerability at such high temperatures can provide such an alternative. In past work, different bulk sorbents with different chemical and structural properties have been tried for high temperature desulfurization. However, in spite of numerous efforts to modify chemical and compositional properties, only a limited success has been achieved. It is due to sorbent's failure in meeting one or more of the aforementioned criteria. For instance, in the past, it has been demonstrated that due to mass transfer limitations, if a bulk sorbent gets completely sulfided, it is almost impossible to achieve complete regeneration afterwards, regardless of process's favorable thermodynamics and chemical kinetics. This incomplete regeneration, partly due to mass transfer limitation and subsequent loss of sorbent's surface area, leads to underutilization of the sorbent material, which is typically a transition or rare earth metal oxide. To overcome these limitations, it seems necessary that one needs to go beyond doing modifications in sorbent chemical composition… Advisors/Committee Members: Shannon, Mark A. (advisor).

Subjects/Keywords: Desulfurization; Nanostructured oxides; Electrospinning; Regenerative adsorbents

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6th Edition):

Behl, M. (2011). Electrospun nanofibrous metal oxides as regenerable adsorbents for desulfurization of biomass-derived syngas. (Thesis). University of Illinois – Urbana-Champaign. Retrieved from http://hdl.handle.net/2142/26135

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16th Edition):

Behl, Mayank. “Electrospun nanofibrous metal oxides as regenerable adsorbents for desulfurization of biomass-derived syngas.” 2011. Thesis, University of Illinois – Urbana-Champaign. Accessed November 13, 2019. http://hdl.handle.net/2142/26135.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7th Edition):

Behl, Mayank. “Electrospun nanofibrous metal oxides as regenerable adsorbents for desulfurization of biomass-derived syngas.” 2011. Web. 13 Nov 2019.

Vancouver:

Behl M. Electrospun nanofibrous metal oxides as regenerable adsorbents for desulfurization of biomass-derived syngas. [Internet] [Thesis]. University of Illinois – Urbana-Champaign; 2011. [cited 2019 Nov 13]. Available from: http://hdl.handle.net/2142/26135.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Behl M. Electrospun nanofibrous metal oxides as regenerable adsorbents for desulfurization of biomass-derived syngas. [Thesis]. University of Illinois – Urbana-Champaign; 2011. Available from: http://hdl.handle.net/2142/26135

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation


Delft University of Technology

2. Snip, O.C. The Interconnected Fluidized Bed reactor - for gas/solids regenerative processes.

Degree: 1997, Delft University of Technology

Subjects/Keywords: fluidized beds; hydrodynamics; solids circulation; gas-solids regenerative processes; regenerative desulfurization; sulfur capture; Interconnected Fluidized Bed

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6th Edition):

Snip, O. C. (1997). The Interconnected Fluidized Bed reactor - for gas/solids regenerative processes. (Doctoral Dissertation). Delft University of Technology. Retrieved from http://resolver.tudelft.nl/uuid:1f06f34a-378a-49a6-9997-206321ddd242 ; urn:NBN:nl:ui:24-uuid:1f06f34a-378a-49a6-9997-206321ddd242 ; urn:NBN:nl:ui:24-uuid:1f06f34a-378a-49a6-9997-206321ddd242 ; http://resolver.tudelft.nl/uuid:1f06f34a-378a-49a6-9997-206321ddd242

Chicago Manual of Style (16th Edition):

Snip, O C. “The Interconnected Fluidized Bed reactor - for gas/solids regenerative processes.” 1997. Doctoral Dissertation, Delft University of Technology. Accessed November 13, 2019. http://resolver.tudelft.nl/uuid:1f06f34a-378a-49a6-9997-206321ddd242 ; urn:NBN:nl:ui:24-uuid:1f06f34a-378a-49a6-9997-206321ddd242 ; urn:NBN:nl:ui:24-uuid:1f06f34a-378a-49a6-9997-206321ddd242 ; http://resolver.tudelft.nl/uuid:1f06f34a-378a-49a6-9997-206321ddd242.

MLA Handbook (7th Edition):

Snip, O C. “The Interconnected Fluidized Bed reactor - for gas/solids regenerative processes.” 1997. Web. 13 Nov 2019.

Vancouver:

Snip OC. The Interconnected Fluidized Bed reactor - for gas/solids regenerative processes. [Internet] [Doctoral dissertation]. Delft University of Technology; 1997. [cited 2019 Nov 13]. Available from: http://resolver.tudelft.nl/uuid:1f06f34a-378a-49a6-9997-206321ddd242 ; urn:NBN:nl:ui:24-uuid:1f06f34a-378a-49a6-9997-206321ddd242 ; urn:NBN:nl:ui:24-uuid:1f06f34a-378a-49a6-9997-206321ddd242 ; http://resolver.tudelft.nl/uuid:1f06f34a-378a-49a6-9997-206321ddd242.

Council of Science Editors:

Snip OC. The Interconnected Fluidized Bed reactor - for gas/solids regenerative processes. [Doctoral Dissertation]. Delft University of Technology; 1997. Available from: http://resolver.tudelft.nl/uuid:1f06f34a-378a-49a6-9997-206321ddd242 ; urn:NBN:nl:ui:24-uuid:1f06f34a-378a-49a6-9997-206321ddd242 ; urn:NBN:nl:ui:24-uuid:1f06f34a-378a-49a6-9997-206321ddd242 ; http://resolver.tudelft.nl/uuid:1f06f34a-378a-49a6-9997-206321ddd242

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