Shou Cheng’s research while affiliated with Tokyo Institute of Technology and other places

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Publications (2)


Figure 2. Number of publications about crude glycerol upgrading from 2010 to 2022. The Web of Science (WoS) search engine was used for the data collection by using specific key words. For thermochemical approaches, "(gasification OR pyrolysis OR supercritical water OR catalytic pyrolysis OR microwave assisted pyrolysis OR steam reforming OR aqueous phase reforming) AND crude glycerol" was applied. For biological approaches, "(fermentation OR microbial conversion) AND crude glycerol" was used. For physicochemical methods, "(emulsification OR esterification OR transesterification OR etherification) AND crude glycerol" was applied, and for electrochemical techniques, "(electrochemical OR electrocatalyst OR electrooxidation) AND crude glycerol" was utilized for the search.
Figure 6. Valorization of glycerol compounds into various intended end-products through different chemical reaction.
Figure 7. Schematic illustration of three staged reactor used for gasification pyrolysis of crude glycerol feed [46].
Figure 8. Microwave-assisted pyrolysis of crude glycerol by magnetron microwave in a quartz reactor with the presence of activated carbon as catalyst. Extracted with permission from Ref. [136].
Figure 9. Chemical pathways of acetylation of crude glycerol by esterification method [166].

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Current and Future Trends for Crude Glycerol Upgrading to High Value-Added Products
  • Article
  • Full-text available

February 2023

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256 Reads

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40 Citations

Sustainability

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Shou Cheng

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Crude glycerol is the main byproduct of biodiesel manufacturing from oleaginous crops and other biomass-derived oils. Approximately 10% crude glycerol is produced with every batch of biodiesel. Worldwide, there is a glut of glycerol and the price of it has decreased considerably. There are real opportunities for valorizing crude glycerol into higher value-added chemicals which can improve the economic viability of biodiesel production as an alternative fuel. Exploring new potential applications of glycerol in various sectors is needed such as in pharmaceuticals, food and beverages, cosmetics, and as a transportation fuel. However, crude glycerol produced directly from biodiesel often contains impurities that hinder its direct industrial usage and thus, a refining process is needed which is typically expensive. Hence, this review reports on current upgrading crude glycerol technologies—thermo-, bio-, physico-, and electrochemical approaches—that valorize it into higher value-added chemicals. Through comparison between those viable upgrading techniques, future research directions, challenges, and advantages/disadvantage of the technologies are described. Electrochemical technology, which is still underdeveloped in this field, is highlighted, due to its simplicity, low maintenance cost, and it working in ambient condition, as it shows promising potential to be applied as a major glycerol upgrading technique.

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Two-step fermentation of cooked rice with Aspergillus oryzae and Clostridium acetobutylicum YM1 for biobutanol production

September 2020

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92 Reads

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10 Citations

Biofuels

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Shou Cheng

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[...]

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In Asia, uneaten cooked rice is the highest portion amongst many forms of food wastes that are thrown away. In order to make use of the thrown-away rice and potentially use it for liquid fuels, steamed Japanese rice was evaluated on biobutanol production through a two-step fermentation by amylase-producing Aspergillus oryzae, and solvent-producing Clostridium acetobutylicum YM1. The effects of sterilization and providing anaerobic conditions on solvent production in acetone-butanol-ethanol (ABE) fermentation cannot be underestimated. Several conditions, including aerobic, anaerobic, sterile, and non-sterile were investigated concerning the solvent production capability of Clostridium acetobutylicum YM1. The maximum solvent production was 11.02 ± 0.22 g/l butanol and 18.03 ± 0.34 g/l total ABE from 75 g/l dried rice. The results confirmed that the solvent production performance of the YM1 strain was not affected by the sterilization conditions. In particular, 10.91 ± 0.16 g/l butanol and 16.68 ± 0.22 g/l ABE were produced under non-sterile and aerobic conditions, which can reduce industrial-scale production costs.

Citations (2)


... Furthermore, purifying CG is prohibitively expensive [8]. Thermo-, physico-, and electrochemical approaches have been employed to convert CG into valuable materials, including various aldehydes, alcohols, acids, and synthetic gases [9]. Despite the inhibitory effects of CG impurities on microbial growth, biotechnological methods have emerged as the most extensively studied approach for CG valorization [10]. ...

Reference:

High-Yield Production of Polyhydroxybutyrate and Poly(3-hydroxybutyrate-co-3-hydroxyhexanoate) from Crude Glycerol by a Newly Isolated Burkholderia Species Oh_219
Current and Future Trends for Crude Glycerol Upgrading to High Value-Added Products

Sustainability

... Joanna Kawarygielska et al. reported A. oryzae final product yields ranging from 0.29 to 0.32 g EtOH/g and 0.20 to 0.22 g biomass/g bread waste, on the second fermentation [112]. Abdullah Bilal Ozturk et al. conducted experiments to test the production of bio-butanol through fermentation of Japanese steamed rice using A. oryzae and Clostridium acetobutylicum, and the output was (10.91 ± 0.16) g/L [113]. ...

Two-step fermentation of cooked rice with Aspergillus oryzae and Clostridium acetobutylicum YM1 for biobutanol production
  • Citing Article
  • September 2020

Biofuels