Effects of Surface Modification of H-ZSM-5 Catalysts on Direct Transformation of Ethanol into Lower Olefins

和久, 村田; 仁, 稲葉; 功, 高原

doi:10.1627/jpi.51.234

Cited by 59 publications

(40 citation statements)

References 13 publications

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“…The amount of NH3 adsorption over Ni-HZSM-5 was less than that over HZSM-5, but the doping of Ni strengthened the strong acid sites. Moreover, the addition of SBA-15 decreased the total acid amount of Ni-HZSM-5 [20]. was associated with the vibration of the pyridinic ring on Brønsted acid sites [15,21,22].…”

Section: Introductionmentioning

confidence: 93%

Jet-Fuel Range Hydrocarbons from Biomass-Derived Sorbitol over Ni-HZSM-5/SBA-15 Catalyst

Weng

Qiu

et al. 2015

Catalysts

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Aromatics and cyclic-hydrocarbons are the significant components of jet fuel with high energy-density. However, conventional technologies for bio-fuel production cannot produce these products without further aromatization and isomerization. In this work, renewable liquid fuel with high content of aromatics and cyclic-hydrocarbons was obtained through aqueous catalytic conversion of biomass sorbitol over Ni-HZSM-5/SBA-15 catalyst. Texture characteristics of the catalyst were determined by physisorption of N2, which indicated its bimodal pore structures were microporous (HZSM-5, pore width: 0.56 nm) and mesoporous (SBA-15, pore width: 8 nm). The surface acidity included weak and strong acid sites, predominantly Lewis type, and was further confirmed by the NH3-TPD and Py-IR analysis. The catalytic performances were tested in a fixed-bed reactor under the conditions of 593 K, WHSV of 0.75 h

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Section: Introductionmentioning

confidence: 93%

Jet-Fuel Range Hydrocarbons from Biomass-Derived Sorbitol over Ni-HZSM-5/SBA-15 Catalyst

Weng

Qiu

et al. 2015

Catalysts

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“…The mechanism of conversion of ethylene to propylene may involve the trimerization of ethylene to give hexane (C 5 H 10 =CH 2 ), followed by β-fission to produce propylene (Eq. (5)) [Murata et al, 2008;Oikawa et al, 2006 …”

Section: Characterizationmentioning

confidence: 99%

VAPOR-PHASE CATALYTIC CONVERSION OF ETHANOL INTO 1,3-BUTADIENE ON Cr-Ba/MCM-41 CATALYSTS

La-Salvia

Lovón-Quintana

Valença

2015

Braz. J. Chem. Eng.

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-Al-MCM-41, 16%Ba/Al-MCM-41 and 1.4%Cr-16%Ba/Al-MCM-41 were used as catalysts in the vapor-phase catalytic conversion of ethanol. Physical-chemical properties of the catalysts and the effect of barium and chromium on the Al-MCM-41 activity and 1,3-butadiene yield were studied. The catalysts were characterized by X-ray diffraction (XRD), N 2 physisorption (BET method), CO 2 chemisorption and Fourier transform infrared spectroscopy (FT-IR). When ethanol was completely converted on Al-MCM-41 and 16%Ba/Al-MCM-41, the reaction products showed a high selectivity for ethylene (90-98%). However, on the 1.4%Cr-16%Ba/Al-MCM-41 catalyst, a greater number of reaction products were obtained such as ethylene, acetaldehyde, diethyl ether and 1,3-butadiene. The maximum 1,3-butadiene yield obtained from ethanol reaction was 25% at 723 K and W/F EtOH = 15 g h mol -1 . The latter result was obtained in a single step and without addition of reaction promoters (e.g., acetaldehyde, crotonaldehyde, hydrogen) in the feed stream to the reactor.

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“…Besides, many literatures reported the conversion of ethanol to hydrocarbons over ZSM-5 [6][7][8][9][10][11][12][13][14][15][16]. However, much attention has been paid to mainly synthesize ethylene, gasoline, or aromatic hydrocarbons from ethanol, there are few reports concerning the ethanolto-propylene (ETP) process [17]. Thus, this work concentrated on studying the direct conversion of ethanol to propylene over unmodified H-ZSM-5 and metal-modified ZSM-5.…”

Section: Introductionmentioning

confidence: 99%

Production of Propylene from Ethanol Over ZSM-5 Zeolites

et al. 2009

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In this work, we studied the conversion of ethanol to propylene over ZSM-5 zeolites. The catalytic performance of H-ZSM-5 (Si/Al 2 = 30, 80, and 280) and ZSM-5 (Si/Al 2 = 80) modified with various metals was investigated. H-ZSM-5(Si/Al 2 = 80) afforded high propylene yield, which indicates that a moderate surface acidity favored propylene production. Zr-modified ZSM-5(80) gave the highest yield (32%) of propylene at 773 K. Furthermore, the catalytic stability of the zeolite was improved by the modification of zirconium. The surface acidity and the presence of metal ions played important roles on the production of propylene.

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Effects of Surface Modification of H-ZSM-5 Catalysts on Direct Transformation of Ethanol into Lower Olefins

Cited by 59 publications

References 13 publications

Jet-Fuel Range Hydrocarbons from Biomass-Derived Sorbitol over Ni-HZSM-5/SBA-15 Catalyst

Jet-Fuel Range Hydrocarbons from Biomass-Derived Sorbitol over Ni-HZSM-5/SBA-15 Catalyst

VAPOR-PHASE CATALYTIC CONVERSION OF ETHANOL INTO 1,3-BUTADIENE ON Cr-Ba/MCM-41 CATALYSTS

Production of Propylene from Ethanol Over ZSM-5 Zeolites

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