Isobutanol to isobutene: Processes and catalysts

Dubois, Jean‐Luc; Segondy, Sandra; Postole, G.; Auroux, A.

doi:10.1016/j.cattod.2023.114126

Cited by 5 publications

(2 citation statements)

References 32 publications

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“…Chemical synthesis is currently the main production route for industrial production of isobutanol, which includes the carbonyl synthesis of isobutanol from propylene, the preparation of isobutanol from syngas [14], the production of isobutanol from isobutylene [15], the preparation of isobutanol from catalyzed low carbon alcohols [16], etc., of which the carbonylation of propylene is the main technology used in the industry at present. Industrially, isobutanol is produced by the carbonylation of propylene (organic/inorganic compounds doped with carbon monoxide).…”

Section: Chemical Synthesis Of Isobutanolmentioning

confidence: 99%

Bio-based Isobutanol: An Emerging Attractive Biofuel

Xie

2024

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Increasingly serious energy and environmental problems have led to a growing interest in the study of biomass energy. Isobutanol (2-methyl-1-propanol) has become a new generation of biofuel with excellent characteristics such as high octane number, high energy density, low vapor pressure, low hygroscopicity, etc., and it is an ideal component for gasoline blending. However, this important compound is mainly produced by chemical synthesis, which not only consumes limited non-renewable human resources but also pollutes the environment. Compared with traditional chemical synthesis, microbial fermentation has the advantages of mild conditions, easy operation, few by-products, environmental protection, energy saving, and cost reduction, especially the easy availability of raw materials and the utilization of renewable resources indicating its promising development prospect. This review summarized the production of isobutanol by fermentation, especially the pioneer work on improving the isobutanol titer in the fermentation broth. For the bioisobutanol fermentation, another challenge is to recover this compound from the fermentation broth efficiently. The current methods using distillation have the disadvantage of being too energy-intensive, raising the cost of the fermentation method. Adsorption, gas stripping, membrane osmotic vaporization, membrane extraction, and liquid-liquid extraction, including salting-out, are new methods for the separation of bio-based isobutanol, which are very important for more efficient recovery of bio-isobutanol. The advantages and disadvantages of each separation technique were summarized. The large amount of water in the isobutanol fermentation broth results in high energy consumption for its separation, and also reduces the sugar load of the fermentation, and increases the amount of water used for fermentation. Further development of microorganisms that can increase solvent titer or methods for in-situ product removal should be developed to improve the market competitiveness of bioisobutanol..

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Section: Chemical Synthesis Of Isobutanolmentioning

confidence: 99%

Bio-based Isobutanol: An Emerging Attractive Biofuel

Xie

2024

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“…5–9 Owing to its cost-effective availability, for example, γ-alumina has been extensively studied for isobutanol dehydration. 10–12 However, a significant decrease in dehydration activity by water is the serious drawback of this catalyst, despite its high selectivity toward isobutene: 12 at 285 °C, isobutanol conversion decreased from 53–61 to 28–42% upon co-feeding of 15 wt% water. 10…”

Section: Introductionmentioning

confidence: 99%

Disordered medium-pore zeolite PST-24 as an efficient low-temperature isobutanol dehydration catalyst

Lee,

Jo,

Hong

2024

Catal. Sci. Technol.

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Constructing High‐Active Surface of Plasmonic Tungsten Oxide for Photocatalytic Alcohol Dehydration

Tian,

Liu,

et al. 2024

Advanced Materials

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Plasmonic semiconductors with broad spectral response hold significant promise for sustainable solar energy utilization. However, their surface inertness limits the photocatalytic activity. Herein, we propose a novel approach to improve the body crystallinity and increase the surface oxygen vacancies of plasmonic tungsten oxide by the combination of hydrochloric acid regulation and light irradiation, which can promote the adsorption of tert‐butyl alcohol (TBA) on plasmonic tungsten oxide and overcome the hindrance of the surface depletion layer in photocatalytic alcohol dehydration. Additionally, this process can concentrate electrons for strong plasmonic electron oscillation on the near surface, facilitating rapid electron transfer within the adsorbed TBA molecules for C‐O bond cleavage. As a result, the activation barrier for TBA dehydration is significantly reduced by 93% to 6.0 kJ mol−1, much lower than that of thermocatalysis (91 kJ mol−1). Therefore, an optimal isobutylene generation rate of 1.8 mol g−1 h−1 (selectivity of 99.9%) is achieved. A small flow reaction system is further constructed, which shows an isobutylene generation rate of 12 mmol h−1 under natural sunlight irradiation. This work highlights the potential of plasmonic semiconductors for efficient photocatalytic alcohol dehydration, thereby promoting the sustainable utilization of solar energy.This article is protected by copyright. All rights reserved

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Isobutanol to isobutene: Processes and catalysts

Cited by 5 publications

References 32 publications

Bio-based Isobutanol: An Emerging Attractive Biofuel

Bio-based Isobutanol: An Emerging Attractive Biofuel

Disordered medium-pore zeolite PST-24 as an efficient low-temperature isobutanol dehydration catalyst

Constructing High‐Active Surface of Plasmonic Tungsten Oxide for Photocatalytic Alcohol Dehydration

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