The Catalytic Dehydration of Bio-ethanol to Ethylene on SAPO-34 Catalysts

Wu, Liangpeng; Zhou, Tiejun; Cui, Qi; Wang, H.; Hu, Yue; Huang, He

doi:10.1080/10916466.2011.572102

Cited by 8 publications

(4 citation statements)

References 7 publications

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“…The weight loss ratio of coke was much lower than the physically adsorbed water. The weight loss from coke calcination of Cr/SAPO-34 and Co-Cr/SAPO-34 catalysts was 1.4% and 3.2%, respectively, which was less than the SAPO-34 catalyst of 8.2% reported in the literature [32]; therefore, it is speculated that the modified catalyst has better anti-coking performance than the SAPO-34 support. As can be seen from the NH 3 -TPD results, the modified catalysts with metal species reduced the amount of acid sites than SAPO-34, thus considerably decreasing the coke deposition of the catalyst [33].…”

Section: Coke Formationmentioning

confidence: 54%

“…Figure 6a showed the N 2 adsorption-desorption isotherms for the different catalysts. According to the IUPAC (2015) classification, SAPO-34 showed the typical type-III isotherm, which indicated the existence of mesoporous materials, namely, the secondary pores [32]. Cr/SAPO-34 and Co-Cr/SAPO-34 catalysts exhibited a typical indicative I-type isotherm without any hysteresis loop.…”

Section: Bet Analysismentioning

confidence: 99%

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Synthesis of Highly Selective and Stable Co-Cr/SAPO-34 Catalyst for the Catalytic Dehydration of Ethanol to Ethylene

et al. 2020

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In this study, silicoaluminophosphate (SAPO)-34 and Me (Me = Cr, Co)-modified SAPO-34 were synthesized and used as catalysts to investigate the catalytic performance by means of a probe reaction from ethanol to ethylene. The metal oxides were loaded on the SAPO-34 support via an impregnation method. The synthesized catalysts were characterized using XRD, SEM, EDX, FT-IR, NH3-TPD, BET, and TGA techniques. Compared to SAPO-34, SAPO-34 doped with metal oxides showed the same chabazite (CHA) topology. The structure and properties of the catalyst were further optimized by varying the amount of Me. The experimental results showed that Co-Cr/SAPO-34 exhibited the best catalytic performance when the reaction temperature reached 400 °C at a weight hourly space velocity (WHSV) of 3.5 h−1, for which the single-pass conversion of ethanol was determined as 99.15%, and the selectivity of ethylene was 99.4% at an optimum catalytic performance in the reaction of up to 600 min. In addition, Co-Cr/SAPO-34 exhibited better catalytic activity and anti-coking ability than pure SAPO-34, which was attributed to its enhanced pore structure and moderate acidity. It can also be concluded from the results of this experiment that the performance of the Co-Cr bimetal-supported catalyst is better than that of the Cr mono-metal catalyst.

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Section: Coke Formationmentioning

confidence: 54%

Section: Bet Analysismentioning

confidence: 99%

Synthesis of Highly Selective and Stable Co-Cr/SAPO-34 Catalyst for the Catalytic Dehydration of Ethanol to Ethylene

et al. 2020

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“…Mostly, the concentration of bioethanol is about 10 wt . In addition, there is some researcher that study the effect of ethanol concentration on catalyst such as Wu et al 31 . They …”

Section: Effect Of Ethanol Concentration In Feedmentioning

confidence: 99%

Effect of HCl Loading and Ethanol Concentration over HCl-Activated Clay Catalysts for Ethanol Dehydration to Ethylene

Krutpijit

Jongsomjit

2017

J. Oleo Sci.

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“…Therefore, the effect of ethanol concentration has to be evaluated. There are some researchers investigated on this effect on catalytic activity such as Krutpijit et al [118] and Wu et al [119]. In this study, the various ethanol concentration was used as reactant (99.9%, 75% and 50% by weight) in the oxidative dehydrogenation reaction.…”

Section: Effect Of Ethanol Concentration On Catalytic Activitymentioning

confidence: 99%

Oxidative dehydrogenation of ethanol to acetaldehyde over magnesium aluminium layered double hydroxides catalyst

Pinthong

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In this research, the characteristic and catalytic activity of Mg-Al LDH and their metal-modified mixed oxide were investigated. This research was divided into three parts. In the first part, the effect of calcination temperature on catalytic performance via oxidative dehydrogenation of ethanol was elucidated. The results showed that calcination temperature affected the characteristic of Mg-Al LDH, especially basicity. Moreover, the calcination temperature also affected the catalytic performance on oxidative dehydrogenation of ethanol over Mg-Al LDH. The result was consistent with the basicity of catalysts. In the second part, the Mg-Al mixed oxide derived from calcination of Mg-Al LDH was modified by loading metal (Mo, V or Cu) on the surface. The results showed that the catalytic activity of metal-modified catalyst was promoted in both dehydrogenation and oxidative dehydrogenation. The copper-modified catalyst (Cu/Mg-Al) exhibited the highest acetaldehyde yield of 41.8% at 350oC. Furthermore, the metal modification not negatively affected the stability of catalyst on oxidative dehydrogenation of ethanol upon time-on-stream for 10 h. According to further investigate the application of catalyst to bioethanol, the effect of water content in ethanol feed was studied in the third part. It revealed that water content negatively affected the catalytic performance of Cu/Mg-Al catalyst, but this effect would be eliminated at high reaction temperature. Moreover, the effect of reduction temperature on catalytic activity was elucidated by varying the pre-reduction temperature of Cu/Mg-Al catalyst (300 and 400oC). It was found that the pre-reduction step insignificantly affected the catalytic performance.

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The Catalytic Dehydration of Bio-ethanol to Ethylene on SAPO-34 Catalysts

Cited by 8 publications

References 7 publications

Synthesis of Highly Selective and Stable Co-Cr/SAPO-34 Catalyst for the Catalytic Dehydration of Ethanol to Ethylene

Synthesis of Highly Selective and Stable Co-Cr/SAPO-34 Catalyst for the Catalytic Dehydration of Ethanol to Ethylene

Effect of HCl Loading and Ethanol Concentration over HCl-Activated Clay Catalysts for Ethanol Dehydration to Ethylene

Oxidative dehydrogenation of ethanol to acetaldehyde over magnesium aluminium layered double hydroxides catalyst

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