Role of Different Feedstocks on the Butanol Production Through Microbial and Catalytic Routes (original) (raw)
Related papers
Role of Di昀ferent Feedstocks on the Butanol Production Through Microbial and Catalytic Routes
Among the renewable fuels, butanol has become an attractive, economic and sustainable choice because of cost elevation in petroleum fuel, diminishing the oil reserves and an increase of green house effect. Butanol can be derived from renewable sources by using the natural bio-resources and agro-wastes such as orchard wastes, peanut wastes, wheat straw, barley straw and grasses via Acetone Butanol Ethanol (ABE) process. On the other hand, butanol can be directly formed from chemical route involving catalysts also such as from ethanol through aldol condensation. This review presents extensive evaluation for the production of butanol deploying microbial and catalytic routes.
Butanol Synthesis Routes for Biofuel Production: Trends and Perspectives
Materials
Butanol has similar characteristics to gasoline, and could provide an alternative oxygenate to ethanol in blended fuels. Butanol can be produced either via the biotechnological route, using microorganisms such as clostridia, or by the chemical route, using petroleum. Recently, interest has grown in the possibility of catalytic coupling of bioethanol into butanol over various heterogenic systems. This reaction has great potential, and could be a step towards overcoming the disadvantages of bioethanol as a sustainable transportation fuel. This paper summarizes the latest research on butanol synthesis for the production of biofuels in different biotechnological and chemical ways; it also compares potentialities and limitations of these strategies.
Biofuels, Bioproducts and Biorefining, 2008
This article reviews bioconversion of plant materials such as wheat straw (WS), corn stover (CS), barley straw (BS), and switchgrass (SG) to butanol and process technology that converts these materials into this superior biofuel. Successful fermentation of low-value WS makes butanol fermentation economically attractive. Simultaneous hydrolysis, fermentation, and product recovery has been successfully performed in a single reactor using WS and C. beijerinckii P260. Research on the production of butanol from other agricultural residues including CS, BS, and SG has steadily progressed. Use of several product-recovery technologies such as liquid-liquid extraction, gas stripping, perstraction, and pervaporation has been successfully applied in laboratory-scale bioreactors. It is expected that these recovery technologies will play a major role in commercialization of this fermentation. By employing in line/ in situ product-recovery systems during fermentation, butanol toxicity to the culture has been drastically reduced. In addition to the use of low-cost plant materials for the production of this biofuel, process integration is expected to play a major role in the economics of this product.
Quest for sustainable bio-production and recovery of butanol as a promising solution to fossil fuel
International Journal of Energy Research, 2015
Biobutanol has conventionally been generated by fermentation of carbohydrates derived from biomass (starch or sugar-based feedstock, such as corn) using Clostridia strains (mainly C. beijerinckii and C. acetobutylicum) under anaerobic conditions in batch mode. Under these premises, it has been tough for the acetone-butanol-ethanol fermentation to compete with petro-butanol production from an energy efficiency and material consumption standpoint. Challenges for butanol production from biomass comprised high cost of feedstock, scarcity of hyper-butanol producing bacteria and low butanol yield, volumetric productivity and titre, leading to high water usage and separation-purification costs. This article is an up-to-date review on several under explored sections, such as optimization of fermenter feed, microbial culture responsible for solvent production (co-culture techniques and electro-biochemical process), latest recovery techniques and the studies integrating in situ continuous fermentation processes. Biobutanol refinery way forward should build upon the use of low-cost lignocellulosic matter and zero cost organic wastes and by-products from food, agriculture, forestry, fermentation and paper industries as feedstock; optimized fermentation of such diversified feed with appropriate hyper-butanol producing strains in biofilm reactors and integration of fermentation step with hybrid high butanolselective recovery techniques.
Bioproduction of butanol from biomass: from genes to bioreactors
Current Opinion in Biotechnology, 2007
Butanol is produced chemically using either the oxo process starting from propylene (with H 2 and CO over a rhodium catalyst) or the aldol process starting from acetaldehyde. The key problems associated with the bioproduction of butanol are the cost of substrate and butanol toxicity/inhibition of the fermenting microorganisms, resulting in a low butanol titer in the fermentation broth. Recent interest in the production of biobutanol from biomass has led to the re-examination of acetone-butanol-ethanol (ABE) fermentation, including strategies for reducing or eliminating butanol toxicity to the culture and for manipulating the culture to achieve better product specificity and yield. Advances in integrated fermentation and in situ product removal processes have resulted in a dramatic reduction of process streams, reduced butanol toxicity to the fermenting microorganisms, improved substrate utilization, and overall improved bioreactor performance.
Cellulosic Butanol Production from Agricultural Biomass and Residues: Recent Advances in Technology
Advanced Biofuels and Bioproducts, 2012
This chapter details the recent advances made on bioconversion of lignocellulosic biomass to butanol, a superior biofuel that can be used in internal combustion engines or transportation industry. It should be noted that butanol producing cultures cannot tolerate or produce more than 20-30 g/L of acetonebutanol-ethanol (ABE) in batch reactors of which butanol is of the order of 13-18 g/L. This is due to toxicity of butanol to the culture. In order to overcome this challenge, two approaches have been applied: (1) developing more butanol tolerant strains using genetic engineering techniques and (2) employing process engineering approaches to simultaneously recover butanol from the fermentation broth thus not allowing butanol concentrations in the reactor to accumulate beyond culture's tolerance. By the application of the fi rst approach, a number of butanol producing strains have been developed; however, none of these accumulated greater than 1,200 mg/L (1.2 g/L) butanol, while using the second approach total ABE up to 461 g/L has been produced. Attempts to improve the newly developed strains are continuing.
n-Butanol derived from biochemical and chemical routes: A review
Biotechnology Reports, 2015
Traditionally, bio-butanol is produced with the ABE (Acetone Butanol Ethanol) process using Clostridium species to ferment sugars from biomass. However, the route is associated with some disadvantages such as low butanol yield and by-product formation (acetone and ethanol). On the other hand, butanol can be directly produced from ethanol through aldol condensation over metal oxides/ hydroxyapatite catalysts. This paper suggests that the chemical conversion route is more preferable than the ABE process, because the reaction proceeds more quickly compared to the fermentation route and fewer steps are required to get to the product.
Improving Butanol Fermentation To Enter the Advanced Biofuel Market
mBio, 2012
1-Butanol is a large-volume, intermediate chemical with favorable physical and chemical properties for blending with or directly substituting for gasoline. The per-volume value of butanol, as a chemical, is sufficient for investing into the recommercialization of the classical acetone-butanol-ethanol (ABE) (E. M. Green, Curr. Opin. Biotechnol. 22:337–343, 2011) fermentation process. Furthermore, with modest improvements in three areas of the ABE process, operating costs can be sufficiently decreased to make butanol an economically viable advanced biofuel. The three areas of greatest interest are (i) maximizing yields of butanol on any particular substrate, (ii) expanding substrate utilization capabilities of the host microorganism, and (iii) reducing the energy consumption of the overall production process, in particular the separation and purification operations. In their study in the September/October 2012 issue of mBio, Jang et al. [mBio 3(5):e00314-12, 2012] describe a comprehen...
Biomass & Bioenergy, 2010
Fermentation of dilute sulfuric acid barley straw hydrolysate (BSH; undiluted/untreated) by Clostridium beijerinckii P260 resulted in the production of 7.09gL−1 ABE (acetone butanol ethanol), an ABE yield of 0.33, and productivity of 0.10gL−1h−1. This level of ABE is much less than that observed in a control experiment (21.06gL−1) where glucose (initial concentration 60gL−1) was used as a substrate. In the