Ethanol dehydrogenation over copper catalysts on rice husk ash prepared by ion exchange

Chang, Feg-Wen; Roselin, L. Selva; Kuo, Wen-Yao

doi:10.1016/j.apcata.2006.02.017

Cited by 135 publications

(57 citation statements)

References 34 publications

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“…The reduction of CuO on Cu/20-SiO2 shows two peaks, the main reduction peak at 220 °C and a broad shoulder peak at 300 °C, suggesting the presence of two kinds of particle sizes of CuO that convert into Cu; the peak at 220 °C belongs to highly dispersed CuO, and the peak at 300 °C corresponds to the reduction of large particles of copper oxide. This finding is consistent with previous findings that reduction of large particles of copper oxide occurs at 255 °C to 300 °C [17,18]. Two reduction peak are also observed in the Cu/4-SiO2 (at 230 °C and 300 °C) and Cu/10-SiO2 (226 °C and 300 °C) catalysts.…”

Section: Reducibility Of the Catalystssupporting

confidence: 82%

Effect of Different Nano-Sized Silica Sols as Supports on the Structure and Properties of Cu/SiO2 for Hydrogenation of Dimethyl Oxalate

Zhang

Wang

et al. 2017

Catalysts

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Cu/x-SiO 2 catalysts with 4, 10, and 20 nm silica sols as supports was produced by ammonia evaporation method and characterized. Different nano-sized silica sols as supports significantly affected the structure and catalytic properties of the copper catalysts for ethylene glycol synthesis from dimethyl oxalate. Compared with Cu/20-SiO 2 and Cu/4-SiO 2 catalysts, the catalytic performance and stability of Cu/10-SiO 2 catalyst were greatly enhanced. The Cu/10-SiO 2 catalyst showed 99.9% conversion with 94% EG selectivity and a lifetime of over 3080 h if it is calculated by industrial weight liquid hourly space velocity (WLHSV) of 0.5 h −1 . The Cu/10-SiO 2 catalyst has one of the longest lifetimes among the catalysts and is a good alternative catalyst for this reaction. Improvement in the catalytic performance and stability of Cu/10-SiO 2 is attributed to the proper S BET , D p and larger dispersion of copper. In addition, the supports of Cu/10-SiO 2 catalyst have smaller particles than that of Cu/20-SiO 2 ; thus, the migration and growth of copper species in catalysts are restrained during the reaction.

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Section: Reducibility Of the Catalystssupporting

confidence: 82%

Effect of Different Nano-Sized Silica Sols as Supports on the Structure and Properties of Cu/SiO2 for Hydrogenation of Dimethyl Oxalate

Zhang

Wang

et al. 2017

Catalysts

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“…Biomass ash was found to be able to promote the biodiesel production rate due to its alkalinity [39][40][41][42]. Ash was also reported to have good catalytic activity for other reactions such as ethanol dehydrogenation [43] and partial oxidation of methanol [44]. Lahijani et al [45] successfully used the ash from palm empty fruit bunch to enhance CO 2 gasification of palm shell char.…”

Section: Introductionmentioning

confidence: 96%

Promoting effect of various biomass ashes on the steam gasification of low-rank coal

et al. 2014

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“…The metallic impurities in RH can be reduced to negligible levels by refluxing with hydrochloric acid (32%) [38]. The chemical composition of RHA, which was examined by X-ray fluorescence spectroscopy (XRF: Philips, PW1400), is shown in Table 1.…”

Section: Preparation Of Zeolitementioning

confidence: 99%

Zeolite Y from rice husk ash encapsulated with Ag-TiO2: characterization and applications for photocatalytic degradation catalysts

Mohamed

Mkhalid

Salam

et al. 2013

Desalination and Water Treatment

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A B S T R A C TA high level of efficiency in the photocatalytic reactions was achieved by increasing the surface area of the photocatalyst by supporting fine TiO 2 particles on porous materials. Among various supports, zeolites seem to be an attractive candidate. Ti-incorporated Y zeolite was prepared by an ion-exchange method, while Ag was immobilized on the encapsulated titanium via impregnation method. The produced samples were characterized using X-ray diffraction, ultraviolet and visible spectroscopy, photoluminescence emission spectra, scanning electron microscopy, and surface area measurement. Furthermore, the catalytic performances of Ti-Ag/NaY tests were carried out for degradation of cyanide using visible light. The results reveal a good distribution of Ag on the zeolite. Ag doping can eliminate the recombination of electron-hole pairs in the catalyst. These results demonstrate that the optimum weight% of Ag to Ti-NaY is 0.3%; this weight% facilitates high performance by the photocatalyst, degrading 99% of cyanide in a 100 mg/L solution in 60 min.

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Ethanol dehydrogenation over copper catalysts on rice husk ash prepared by ion exchange

Cited by 135 publications

References 34 publications

Effect of Different Nano-Sized Silica Sols as Supports on the Structure and Properties of Cu/SiO2 for Hydrogenation of Dimethyl Oxalate

Effect of Different Nano-Sized Silica Sols as Supports on the Structure and Properties of Cu/SiO2 for Hydrogenation of Dimethyl Oxalate

Promoting effect of various biomass ashes on the steam gasification of low-rank coal

Zeolite Y from rice husk ash encapsulated with Ag-TiO2: characterization and applications for photocatalytic degradation catalysts

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