Recent Advances in Catalytic Conversion of Ethanol to Chemicals

Sun, Junming; Wang, Yong

doi:10.1021/cs4011343

Cited by 556 publications

(423 citation statements)

References 141 publications

Supporting

Mentioning

420

Contrasting

Order By: Relevance

“…Using raw bioethanol (ca. 10 wt % ethanol in H 2 O) was detrimental both in terms of conversion and selectivity for alumina and titania-based catalysts [22] and temperature higher than 420°C was suggested to remove the water effect [58][59][60][61]. Therefore, also the effect of temperature seems contradictory, depending on the selected feed.…”

Section: -Effect Of Acidic Sites Naturementioning

confidence: 99%

See 1 more Smart Citation

Ethylene production via catalytic dehydration of diluted bioethanol: A step towards an integrated biorefinery

Rossetti

Compagnoni

Finocchio

et al. 2017

Applied Catalysis B: Environmental

View full text Add to dashboard Cite

After a preliminary thermodynamic investigation, proper operating conditions have been selected to maximise ethylene productivity by ethanol dehydration and limit side products such as coke and higher olefins or oxygenates. We focused on the possibility to operate with a diluted bioethanol solution (ca. 50 wt%), which represents a promising and convenient raw material, obtainable by simple flash concentration of the fermentation broth. Furthermore, water addition to the ethanol dehydration reactor may help preventing catalyst coking and diethyl ether formation, although affecting the thermodynamic products distribution. A proof of concept for an ethanol dehydration process using diluted ethanol is also provided through process simulation. Catalysts based on a BEA zeolite have been compared, characterised by different acidity imparted by dealumination treatments. Ni addition in variable loading helped suppressing undesired byproducts, difficult to separate from ethylene. For instance, no trace of diethyl ether nor acetaldehyde has been observed for the Ni-loaded samples under optimised working conditions. Catalyst characterisation by FT IR allowed correlating a high selectivity to ethylene with the acid sites nature of the catalyst, whereas the presence of extraframework Lewis acidic sites induced faster coke formation. Durability was finally checked on the most active and selective catalyst evidencing stable operation for 80 h-on-stream and without evidence of coke deposition, as determined after characterisation of the spent samples. A γ-Al2O3 catalyst has been tested as benchmark under the same conditions

show abstract

Section: -Effect Of Acidic Sites Naturementioning

confidence: 99%

“…Summaries of the catalytic performance of different zeolites have been reported [2,14,20,21] and very recently reviewed by Sun and Wang [22]. Alumina is the most used and investigated catalyst for this application.…”

mentioning

confidence: 99%

Ethylene production via catalytic dehydration of diluted bioethanol: A step towards an integrated biorefinery

Rossetti

Compagnoni

Finocchio

et al. 2017

Applied Catalysis B: Environmental

View full text Add to dashboard Cite

show abstract

“…Carbon deposition over nickel-based catalysts is a fatal problem for the steam reforming of bio-ethanol. Furthermore, the production of hydrogen rich gas with a low concentration of carbon monoxide is a challenge using nickel catalysts, which are not so active in the water-gas shift reaction [40]. Both the nature of the metal and the support significantly affect the product distribution.…”

Section: Methodsmentioning

confidence: 99%

Hydrogen Production by the Steam Reforming of Bio-Ethanol over Nickel-Based Catalysts for Fuel Cell Applications

Chen¹,

Xu²

2017

IJSGE

View full text Add to dashboard Cite

Abstract:The bio-ethanol steam reforming over nickel-based catalysts when the temperature is within the range of 700 to 800 K is studied for fuel cell applications. The effect of operating conditions such as the temperature, space time, water-to-ethanol molar ratio, and oxygen-to-ethanol molar ratio on the product distribution is evaluated. The water-gas shift reaction is examined in the reforming process. Adjusting feed ratios to favor carbon removal from the surface is discussed in detail. It is shown that a nickel-supported-on-alumina catalyst completely converts bio-ethanol and high hydrogen yields are obtained. High temperatures and water-to-ethanol ratios can promote hydrogen production. There is no evidence that the water-gas shift reaction occurs over nickel-based catalysts. Carbon formation can be minimized by using high water-to-ethanol ratios. The presence of oxygen in the feed plays a favorable effect on the carbon deposition, but the carbon monoxide production is not reduced. There are several reaction pathways that could occur in the bio-ethanol steam reforming process, and the catalyst produces ethylene and acetaldehyde as intermediate products. The region of carbon formation depends on the temperature as well as the water-to-ethanol and oxygen-to-ethanol molar ratios. Finally, an overall reaction scheme as a function of temperature is proposed. The best catalysts appear to be those that are sufficiently basic to inhibit the dehydration of ethanol to ethylene, which subsequently polymerizes and causes coke formation.

show abstract

“…6,8 Studies on the synthesis of BD from ethanol can be dated back to early 1900's, and details are introduced in the recent review. 2 Among the pioneering research, Lebedev proposed a one-step dehydration process to convert ethanol into BD (Lebedev process) over ZnO-Al 2 O 3 catalyst but with a very low yield of BD.…”

Section: Ethanol-derived Bdmentioning

confidence: 99%

“…2,6,7 Makshina et al have reviewed from old to new chemistry of the production of BD. 2 They focused on BD production from ethanol and C 4 alcohols.…”

Section: Introductionmentioning

confidence: 99%

Future Prospect of the Production of 1,3-Butadiene from Butanediols

Duan¹,

Yamada²,

Sato³

2016

Chem. Lett.

View full text Add to dashboard Cite

Global supply of 1,3-butadiene (abbreviated as BD) is faced with problems such as unstable price of petrochemicals and variation of chemical feedstock in recent years. Many research works have been conducted to produce BD from some renewable resources instead of petroleum. Among them, biomass-derived C 4 alcohols such as 1,3-butanediol (1,3-BDO), 2,3-butanediol (2,3-BDO), and 1,4-butanediol (1,4-BDO) have been considered as alternative resources to produce BD. Direct dehydration of butanediols (BDOs) into BD, however, needs high reaction temperatures while the dehydration into their corresponding unsaturated alcohols (UOLs) such as 3-buten-2-ol (3B2OL), 2-buten-1-ol (2B1OL), and 3-buten-1-ol (3B1OL) proceeds at rather low temperatures over specific catalysts. The latter step of BDO dehydration, dehydration of UOLs to BD, is readily catalyzed by solid acids even at lower temperatures than those at which BDOs are dehydrated completely. Thus, efficient formation of UOLs from BDOs would be a key process to produce BD with high selectivity. We summarize the BD production from C 4 alcohols as well as the dehydration of BDOs to UOLs, in addition to the BD production via ethanol dimerization.

show abstract

Recent Advances in Catalytic Conversion of Ethanol to Chemicals

Cited by 556 publications

References 141 publications

Ethylene production via catalytic dehydration of diluted bioethanol: A step towards an integrated biorefinery

Ethylene production via catalytic dehydration of diluted bioethanol: A step towards an integrated biorefinery

Hydrogen Production by the Steam Reforming of Bio-Ethanol over Nickel-Based Catalysts for Fuel Cell Applications

Future Prospect of the Production of 1,3-Butadiene from Butanediols

Contact Info

Product

Resources

About