Highly selective conversion of ethene to propene over SAPO-34 as a solid acid catalyst

Oikawa, Hiroshi; Shibata, Y.; Inazu, Koji; Iwase, Yasuyoshi; Murai, Kazuhito; Hyodo, Shinya; Kobayashi, Genta; Baba, Toshihide

doi:10.1016/j.apcata.2006.06.045

Cited by 148 publications

(136 citation statements)

References 8 publications

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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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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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“…Promising candidate routes for producing light olefins include catalytic cracking of naphtha [55][56][57][58] and oxygen-containing chemicals to olefins, such as methanol-to-olefins (MTO) [59,60], ethanol-to-olefins (ETO) [61][62][63][64], and acetone-to-olefins (ATO) [65][66][67][68][69][70][71]. In these olefin syntheses, the initial products consist mainly of lighter olefins such as ethylene, propylene and butylene.…”

Section: Catalytic Reactionmentioning

confidence: 99%

Size-Controlled Synthesis of Nano-Zeolites and Their Application to Light Olefin Synthesis

et al. 2012

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For the application of zeolites as heterogeneous catalysts, low diffusion resistance for hydrocarbons within the micropore is essential for improving product selectivity and catalyst lifetime. This problem has been overcome by reducing the crystal size. This review introduces size-controlled preparation of nano-sized zeolites via hydrothermal synthesis in water/surfactant/organic solvent (emulsion method) and their application to heterogeneous catalysts. The ionicity of the hydrophilic group in surfactant molecules and the concentration of the Si source affected the crystallinity and morphology of zeolites prepared using the emulsion method. When using a non-ionic surfactant, mono-dispersed silicalite-1 nanocrystals approximately 60 nm in diameter were successfully prepared. Nano-and macro-ZSM-5 zeolites with crystal sizes of approximately 150-200 nm and 1.5 µm, respectively, were prepared and applied to n-hexane cracking and acetone-to-olefin reactions to investigate the effect of zeolite crystal size on catalytic stability and light olefin yield. Application of nano-zeolite to light olefin production was effective in achieving faster mass transfer of hydrocarbon molecules within the micropore, which led to improvements in olefin yields and catalyst lifetime.

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“…The SAPO-34 structure includes a CHA cage (0.75 nm diameter× 0.82 nm), which is accessible via six eight-member rings (0.45 nm×0.41 nm) 49) . The pore size of SAPO-34 (0.45 nm×0.41 nm) is thus approximately equal to the kinetic diameter of propene (0.45 nm) and smaller than the kinetic diameter of 2-methyl propene (0.50 nm).…”

Section: Effect Of Pore Size On Selectivity For Propenementioning

confidence: 99%

“…Formation To examine the effect of pore size on the selectivity for propene, the conversion of ethene at 723 K was con ducted under 33.3 kPa of ethene using the silicoalumino phosphate molecular sieve 49) . The catalytic performance of these materials after 1 h time on stream is summarized in Table 5 49) .…”

Section: Effect Of Pore Size On Selectivity For Propenementioning

confidence: 99%

Propene Production from Ethene and Methane Using Silver- and Proton-exchanged Zeolite Catalysts

Inazu

Koyama

Miyaji

et al. 2008

J. Jpn. Petrol. Inst.

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Two new methods for the catalytic synthesis of propene using solid acid catalysts are presented. The first approach is a new method for the activation of methane, involving conversion of methane to propene over silverexchanged zeolite in the presence of ethene. In the second method, ethene conversion proceeds directly and selectively over proton-exchanged zeolite under the control of a molecular sieving effect.The heterolytic dissociation of methane over silver cationic clusters (Agn ＋ ) in Ag ＋ -exchanged zeolites, leading to the formation of silver hydride (Agn _ H) and CH3 δ＋ species, which reacts with ethene to form propene around 673 K. Using 13 C-labeled methane as a reactant, propene is shown to be a primary product from methane and ethene. Thus, a significant proportion of propene was singly 13 C-labeled ( 13 CC2H6). Under these reaction conditions, H ＋ -exchanged zeolites, such as H _ ZSM-5 do not catalyze the methane con version, only ethene being converted into higher hydrocarbons, such as propene. Ethene is selectively converted to propene over SAPO-34 at 723 K with a yield of 52.2％ and selectivity of 73.3％ at ethene conversion of 71.2％. The high and selective propene yields achieved over SAPO-34 can be attributed to a shape selectivity effect of the small-pore SAPO-34.

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Highly selective conversion of ethene to propene over SAPO-34 as a solid acid catalyst

Cited by 148 publications

References 8 publications

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

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

Size-Controlled Synthesis of Nano-Zeolites and Their Application to Light Olefin Synthesis

Propene Production from Ethene and Methane Using Silver- and Proton-exchanged Zeolite Catalysts

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