Technical and Economic approach of bioethanol production from nanofiltration of biomass chemical hydrolysis solutions

Kuo, Yen‐Ting; Chen, Ju-Shiou; Yang, Tzu-Yueh; Wan, Hou‐Peng

doi:10.1016/j.apenergy.2018.02.026

Cited by 8 publications

(6 citation statements)

References 51 publications

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“…Two cases are considered in this case study. Case 1 uses membrane performance data obtained from experiments [5], while case 2 assumes hypothetical parameters to analyze the impact of membrane performance on the optimal network configuration. In either case, the objective is to synthesize the minimum-cost NF membrane network that achieves the desired separation.…”

Section: Case Studymentioning

confidence: 99%

“…Table 1 shows the data for membrane units. These performance data are obtained experimentally using commercially available NF membranes of Dow Chemicals [5]. It can be seen that the removal ratio of ZnCl 2 varies according to the membrane type and the inlet concentration.…”

Section: Case Studymentioning

confidence: 99%

“…Purification of reducing sugars after ionic-solution hydrolysis is considered a critical step of the entire bioethanol production process, because the separation of the salt from glucose is often expensive and may encounter contamination from solvent extraction. The ITRI has studied the separation of high-concentration ZnCl 2 from the hydrolysis sugar product by nanofiltration (NF) and proven the capability of this approach [5]. The separation performance of NF membranes is between that of ultrafiltration (UF) and reverse osmosis (RO) membranes; however, NF membranes have a wider range of applications than conventional membranes [6].…”

Section: Introductionmentioning

confidence: 99%

“…With many results, NF has proven itself to be a good candidate for sugar/salt separation [5]. However, the required product specifications cannot be met with a single membrane; a number of membrane units are needed to achieve the desired effect.…”

Section: Introductionmentioning

confidence: 99%

“…Chemical hydrolysis using a ZnCl 2 solution has been recognized as a promising method for converting lignocellulosic biomass to glucose [4]. The subsequent removal of ZnCl 2 from the hydrolysate using NF membranes (for the hydrolysis sugar solution to be fermented) is critical to the economic viability of bioethanol production through chemical hydrolysis [5]. In this paper, a mathematical model is developed for the design and optimization of NF membrane networks for sugar/salt separation.…”

Section: Introductionmentioning

confidence: 99%

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As an alternative to gasoline, bioethanol can be produced from lignocellulosic biomass through hydrolysis using an ionic solution containing zinc chloride (ZnCl2). This method allows for a high yield of glucose from lignocellulose, but entails the removal of ZnCl2 from the hydrolysate using multiple nanofiltration membranes before the fermentation of glucose. This paper presents a mathematical technique for designing such a multistage membrane separation system. The optimization model for the synthesis of membrane networks is based on a superstructure with all feasible interconnections between the membrane units, and consists of mass balances, logical constraints and product specifications. A case study of the separation of a bagasse hydrolysis solution is used to demonstrate the application of the proposed model. Results show that using both types of nanofiltration membranes allows higher ZnCl2 removal ratios at each membrane unit, hence a decrease in the number of membrane units required and a reduction of about 35% in capital cost compared to the cases in which only one membrane type is used. Further analysis is performed to examine the effect of membrane performance on the economics of the separation system.

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Section: Case Studymentioning

confidence: 99%

Section: Case Studymentioning

confidence: 99%