Isobutanol Vapor Adsorption on Activated Carbons: Equilibrium and Kinetic Studies

Downarowicz, D.; Aleksandrzak, Tomasz

doi:10.1021/acs.jced.7b00528

Cited by 10 publications

(3 citation statements)

References 38 publications

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“…Firstly, the current industrial production of bioethanol, bio-n-butanol separation, and extraction process has been mature; secondly, the current research on the separation and extraction of bio-isobutanol is very little, but we summarize some novel methods for the extraction of bio-isobutanol. Adsorption [26][27][28][29], gas stripping [30], membrane osmotic vaporization [30][31][32][33][34][35], membrane extraction, and liquid-liquid extraction [36][37][38][39], including salting-out [40][41][42][43][44][45][46][47] for the separation of bio-based isobutanol were summarized in this review.…”

Section: Separation Process For the Biological 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: Separation Process For the Biological Isobutanolmentioning

confidence: 99%

Bio-based Isobutanol: An Emerging Attractive Biofuel

Xie

2024

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“…Meanwhile, the purity of ethanol as a biofuel is very high, which is about 99 wt% [4]. Therefore, an appropriate and energy-efficient purification technology is required, and the adsorption process using activated carbon (AC) can be a good option [5]. The research results of Downarowicz and Aleksandrzak (2017) [5] show that AC has a strong affinity for organic polar compounds, including bioethanol.…”

Section: Introductionmentioning

confidence: 99%

“…Therefore, an appropriate and energy-efficient purification technology is required, and the adsorption process using activated carbon (AC) can be a good option [5]. The research results of Downarowicz and Aleksandrzak (2017) [5] show that AC has a strong affinity for organic polar compounds, including bioethanol. Functionally, AC can also be used as a catalyst carrier [6], drinking water disinfection, energy storage, and gas storage [7].…”

Section: Introductionmentioning

confidence: 99%

Effects of Phosphate and Thermal Treatments on the Characteristics of Activated Carbon Manufactured from Durian (Durio zibethinus) Peel

Damayanti,

Wulansarie,

Bahlawan

et al. 2023

ChemEngineering

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The availability of fossil energy is dwindling, so renewable fuels are the alternative choices, one of which is bioethanol. To increase the purity of the ethanol produced via the fermentation process, activated carbon (AC) was made from durian (Durio zibethinus) peel. The steps for making AC consist of carbonization (300 °C and 400 °C), chemical activation using phosphoric acid (10–40%), pyrolysis (700 °C and 800 °C), and neutralization. The results showed that the maximum surface area (326.72 m2/g) was obtained from 400 °C carbonization, 800 °C pyrolysis, and activation using a 40% phosphoric acid solution. Other characteristics are the surface area of 326.72 m2/g, pore radius of 1.04 nm, and total pore volume of 0.17 cc/g with phosphate residue in the form a P2O5 molecule of 3.47% by weight, with COOH, OH, CO, C=C, C=O, P-OC, and Fe-O groups with wavenumbers (cm−1), respectively, of 3836, 3225, 2103, 1555, 1143, and 494. The AC also demonstrated the highest number of carbon (86.41%) upon detection using EDX, while XRF analysis verified an average carbon content of 94.45 wt%. The highest ethanol adsorption efficiency (%) and the lowest yield (%) of AC (%) were 90.01 ± 0.00 and 23.26 ± 0.01. This study shows that durian peel has great potential as the raw material for the activated carbon manufacture of ethanol adsorbents.

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Biobutanol extraction and dehydration with eucalyptus oil yielding linear and cyclic biofuel blends

Tan,

Huang,

et al. 2024

AIChE Journal

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The biobutanol‐based biofuel fermentation is hindered by the challenge of inadequate fermentation broth concentration and the azeotropic systems of water. The application of eucalyptus oil in diesel fuel makes it a promising extractant for biobutanol extraction and dehydration, thus resulting in product recovery and the development of fuel blend technology. Eucalyptus oil‐derived 1,8‐cineole was applied to acetone‐butanol‐ethanol (ABE) and isobutanol systems to enhance the butanol recovery and dehydration. The recovery of n‐butanol and isobutanol reached 92% and 95%, respectively, while the water removal in a 2% butanol system exceeded 99%. These results demonstrated that 1,8‐cineole exhibited a high selectivity toward butanol, thus providing a robust theoretical foundation for the fermentation‐based biofuel recovery and the elimination of azeotropic systems. The introduction of high‐density diesel‐fuel‐like eucalyptus oil into low‐energy‐density biobutanol will increase the energy density of fermentation‐based alcohols, yielding linear and cyclic biofuel blends.

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Isobutanol Vapor Adsorption on Activated Carbons: Equilibrium and Kinetic Studies

Cited by 10 publications

References 38 publications

Bio-based Isobutanol: An Emerging Attractive Biofuel

Bio-based Isobutanol: An Emerging Attractive Biofuel

Effects of Phosphate and Thermal Treatments on the Characteristics of Activated Carbon Manufactured from Durian (Durio zibethinus) Peel

Biobutanol extraction and dehydration with eucalyptus oil yielding linear and cyclic biofuel blends

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