Alumina and Tungstophosphoric Acid Loaded Mesoporous Catalysts for the Polyethylene Degradation Reaction

Date

2013-11-06

Author

Aydemir, Bugce
Sezgi, Naime Aslı

Metadata

Show full item record

This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

Item Usage Stats

134
views

0
downloads

Polyethylene degradation over alumina and tungstophosphoric acid (TPA) containing ordered mesoporous catalysts was studied in a semibatch reactor. In the noncatalytic degradation reaction, selectivity of C-3 and C-4 hydrocarbons was quite high. However, significant ethylene and C-4 hydrocarbon selectivity was observed in the catalytic degradation reaction depending on the type of catalyst used. Liquid product distribution in the noncatalytic degradation reaction indicated the presence of hydrocarbons, being greater than C-18. In the catalytic degradation, chemical composition of the liquid product was hydrocarbons in the range of C-5-C-14. With an increase in the TPA loading, the amount of lighter hydrocarbons in the carbon number range of C-5-Cu-12 was slightly increased due to a decrease in the catalysts' surface area with loading. Both catalysts are materials with promising catalytic properties for the production of liquid feedstocks from polymeric wastes.

Subject Keywords

Industrial and Manufacturing Engineering, General Chemistry, General Chemical Engineering

URI

https://hdl.handle.net/11511/38526

Journal

INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH

DOI

https://doi.org/10.1021/ie400634m

Collections

Department of Chemical Engineering, Article

Suggestions

OpenMETU
Core

Rhodium(0) nanoparticles supported on nanotitania as highly active catalyst in hydrogen generation from the hydrolysis of ammonia borane Akbayrak, Serdar; Gencturk, Serap; MORKAN, İzzet; Özkar, Saim (Royal Society of Chemistry (RSC), 2014-01-01) Rhodium(0) nanoparticles supported on the surface of titanium dioxide (Rh(0)@TiO2) were in situ generated from the reduction of rhodium(III) ions impregnated on nanotitania during the hydrolysis of ammonia borane. They were isolated from the reaction solution by centrifugation and characterized by a combination of advanced analytical techniques. The results show that (i) highly dispersed rhodium(0) nanoparticles with sizes in the range 1.3-3.8 nm were formed on the surface of titanium dioxide, (ii) Rh(0)@Ti...
Mn-Cu and Mn-Cu-V mixed-oxide regenerable sorbents for hot gas desulfurization Karayilan, D; Doğu, Timur; Yasyerli, S; Dogu, G (American Chemical Society (ACS), 2005-07-06) Porous Mn-Cu and Mn-Cu-V mixed-oxide sorbents prepared by the complexation technique were tested for high-temperature removal of H2S in the presence of hydrogen gas. Sorption experiments carried out at 627 T in a fixed-bed reactor showed higher reactivity and also higher sulfur retention capacity (over 0.15 g of S/g of sorbent) for the Mn-Cu mixed oxide than for the Mn-Cu-V mixed oxide. Successive sulfidation-regeneration cycles demonstrated that the MnCu mixed oxide was also more stable than Mn-Cu-V, maint...
Electrospun amino-functionalized PDMS as a novel SPME sorbent for the speciation of inorganic and organometallic arsenic species Boyacı, Ezel; Cagir, Ali; Demir, Mustafa M.; Eroglu, Ahmet E. (Royal Society of Chemistry (RSC), 2013-01-01) Sol-gel based amine-functionalized SPME fibers (PDMS-weak anion exchanger) were prepared and used for direct mode extraction of dimethylarsinic acid (DMA), monomethylarsonic acid (MMA), and arsenate (As(V)) from aqueous solutions followed by HPLC-ICPMS determination. Two different methods of coating were employed: (i) electrospinning and (ii) dip coating. Electrospinning was used for the first time for preparation of sol-gel based SPME fibers and was found to be superior in terms of extracted amount of arse...
Hydroxyapatite-nanosphere supported ruthenium(0) nanoparticle catalyst for hydrogen generation from ammonia-borane solution: kinetic studies for nanoparticle formation and hydrogen evolution DURAK, HALİL; Gülcan, Mehmet; Zahmakıran, Mehmet; Özkar, Saim; KAYA, MURAT (Royal Society of Chemistry (RSC), 2014-01-01) The development of readily prepared effective heterogeneous catalysts for hydrogen generation from ammonia-borane (AB; NH3BH3) solution under mild conditions still remains a challenge in the field of "hydrogen economy". In this study, we report our finding of an in situ generated, highly active ruthenium nanocatalyst for the dehydrogenation of ammonia-borane in water at room temperature. The new catalyst system consists of ruthenium(0) nanoparticles supported on nanohydroxyapatite (RuNPs@nano-HAp), and can ...
Effect of Midsynthesis Addition of Silica to the Synthesis Medium on the Properties of MFI-Type Zeolite Membranes Soydas, Belma; Kalıpçılar, Halil; Culfaz, Ali (American Chemical Society (ACS), 2010-06-02) Thin zeolite membranes of MFI type were prepared on alpha-Al2O3 supports by midsynthesis addition of silica in a recirculating flow system at 95 degrees C The synthesis was started with the batch composition of 80SiO(2): 30TPAOH:1500H(2)O which was changed to 80SiO(2)center dot 9TPAOH:1500H(2)O by addition of silica Mkt 24, 48, or 72 h Compared to synthesis at constant composition. it is possible to affect the rates of nucleation and crystal growth to obtain membranes with better quality by changing the ove...

Citation Formats

B. Aydemir and N. A. Sezgi, “Alumina and Tungstophosphoric Acid Loaded Mesoporous Catalysts for the Polyethylene Degradation Reaction,” INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH, pp. 15366–15371, 2013, Accessed: 00, 2020. [Online]. Available: https://hdl.handle.net/11511/38526.