Article
Biotechnology & Applied Microbiology
Miguel G. Acedos, Isabel de la Torre, Victoria E. Santos, Felix Garcia-Ochoa, Jose L. Garcia, Beatriz Galan
Summary: The addition of NADH-dependent alcohol dehydrogenase and PntAB transhydrogenase in Shimwellia blattae increased the isobutanol production. These modifications reduced by-products yields such as lactic acid or ethanol, showing improvements in yield from 11.9% to 14.4% and 16.4%, respectively.
BIOTECHNOLOGY FOR BIOFUELS
(2021)
Article
Agriculture, Multidisciplinary
Ya'nan Shi, Rongshan Li, Jie Zheng, Yubin Xue, Yong Tao, Bo Yu
Summary: This study explores a new route for propionate production using the robust oxidization capacity of Pseudomonas putida KT2440 strain. By optimizing gene expression and eliminating intermediate products, high-purity propionate is produced from 1,2-propanediol with high efficiency.
JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY
(2022)
Article
Agricultural Engineering
Junhua Yun, Hossain M. Zabed, Yufei Zhang, Amreesh Parvez, Guoyan Zhang, Xianghui Qi
Summary: The study successfully developed a co-culture method for producing 1,3-propanediol without the need for vitamin B-12, resulting in a higher yield of 1,3-PD. The co-fermentation in a 10 L bioreactor achieved a high productivity of 41.65 g/L 1,3-PD, showcasing the potential for cost-effective and efficient bioproduction.
BIORESOURCE TECHNOLOGY
(2021)
Article
Biotechnology & Applied Microbiology
Shaoqi Sun, Lin Shu, Xiyang Lu, Qinghui Wang, Marina Tisma, Chenguang Zhu, Jiping Shi, Frank Baganz, Gary J. Lye, Jian Hao
Summary: The study demonstrates an efficient way of producing 1,2-propanediol from glycerol via an endogenous pathway of K. pneumoniae. Key enzymes for 1,2-propanediol synthesis were identified, and optimal process parameters were determined for maximal production in the strain.
APPLIED MICROBIOLOGY AND BIOTECHNOLOGY
(2021)
Review
Chemistry, Multidisciplinary
Marek Glowka, Tomasz Krawczyk
Summary: The production of 1,2-propanediol is facing significant challenges in the chemical industry due to the increasing demand and environmental regulations. The traditional method is energy intensive, therefore sustainable routes using renewable raw materials are becoming more attractive. This perspective reviews the current research and patents on 1,2-propanediol production, discussing alternative pathways, such as glycerol hydrogenolysis and biotechnological methods, and modern methods like chromium-free catalytic systems and multifunctional catalysts. Biobased 1,2-propanediol has the potential to replace traditional petroleum-derived 1,2-propanediol with environmental and economic benefits.
ACS SUSTAINABLE CHEMISTRY & ENGINEERING
(2023)
Article
Biotechnology & Applied Microbiology
Lin Shu, Qinghui Wang, Weiyan Jiang, Marina Tisma, Beakrock Oh, Jiping Shi, Gary J. Lye, Frank Baganz, Dong Wei, Jian Hao
Summary: This study revealed that glycerol catabolism and 1,2-propanediol catabolism in K. pneumoniae are undertaken by glycerol dehydratase and diol dehydratase, respectively. The Pdu microcompartment reduces the accumulation of 3-hydroxypropionaldehyde in the fermentation broth. PduG can cross reactivate glycerol dehydratase, while DhaF is not involved in the reactivation of diol dehydratase.
ENZYME AND MICROBIAL TECHNOLOGY
(2022)
Article
Polymer Science
Sai Nandhini Ravi, Mugesh Sankaranarayanan
Summary: This study aims to improve the co-production of propanediol (PDO) and 3-hydroxypropionic acid (3-HP) by isolating a new strain of K. quasipneumoniae MSN12 (KpMSN12) and overexpressing the aldH and dhaB genes. The results showed that the combined overexpression of aldH and dhaB in KpMSN12 led to higher 3-HP and PDO production, as well as improved sedimentation characteristics and increased susceptibility to antibiotics.
JOURNAL OF INORGANIC AND ORGANOMETALLIC POLYMERS AND MATERIALS
(2023)
Review
Chemistry, Physical
Mohamad Razlan Md Radzi, M. Devendran Manogaran, Mohd Hizami Mohd Yusoff, Zulqarnain, Mohd Razealy Anuar, Noor Fazliani Shoparwe, Mohd Fikri Ab Rahman
Summary: The study explores the possibility of producing 1,2-propanediol and 1,3-propanediol through aqueous phase reforming, which offers a low temperature requirement and high H-2 yields. Various catalyst combinations have been identified for optimal yields, with a Cu-based catalyst and a noble metal-dopant-support combination being key factors for 1,2-propanediol and 1,3-propanediol production respectively. The findings show potential for high yields of both products, especially for 1,2-propanediol.
Article
Energy & Fuels
Juan B. Restrepo, Carlos D. Paternina-Arboleda, Antonio J. Bula
Summary: The study aimed to evaluate the economic potential of producing 1,2-propanediol from biodiesel in Colombia, with a designed plant to achieve this goal. Costs were estimated and viability assessed through the NPV and MIRR, showing economic feasibility for moderate price variations.
Article
Energy & Fuels
Shan Liu, Zhiquan Yu, Chenyang Lu, Yao Wang, Fanfei Sun, Zhichao Sun, Yingya Liu, Chuan Shi, Anjie Wang
Summary: In this study, high-performance catalysts containing copper carbide (CuxC) were prepared for the hydrogenolysis of renewable glycerol towards 1,2-propanediol (1,2-PDO). The synthesis of Cu(OH)2-Zn(OH)2 mixture in a microchannel reaction system yielded highly dispersed precursors, and the addition of ZnO improved the dispersion of copper species with enhanced acidity. Copper carbide composite catalyst (Cu/Zn = 8) exhibited significantly higher hydrogenation activity and contributed to enhanced catalytic activity for continuous glycerol hydrogenolysis.
Article
Agricultural Engineering
Hannes Russmayer, Stefan Ergoth, Hans Marx, Michael Sauer
Summary: 3-hydroxypropionic acid (3-HP) is a platform chemical produced from microbial fermentation using renewable resources. Crude glycerol is a promising substrate for 3-HP production. Lentilactobacillus diolivorans is an efficient microorganism for the conversion of glycerol to 3-HP. Process engineering techniques were applied to optimize the production of 3-HP, resulting in the highest reported titer using Lactobacillus spp.
BIORESOURCE TECHNOLOGY
(2023)
Article
Agricultural Engineering
Pseudomonas Asiatica, Trinh Thi Nguyen, Suman Lama, Satish Kumar Ainala, Mugesh Sankaranarayanan, Ashish Singh Chauhan, Jung Rae Kim, Sunghoon Park
Summary: The study demonstrates that Pseudomonas asiatica C1 can be a promising host for the production of 3-HP from glycerol by genetic editing and optimization, achieving high production efficiency and molar yield on glucose.
BIORESOURCE TECHNOLOGY
(2021)
Article
Engineering, Chemical
Juan B. Restrepo, Johnnys A. Bustillo, Antonio J. Bula, Carlos D. Paternina
Summary: This paper discusses the importance of propylene glycol as well as the simulation and dimensioning of a trickle bed reactor. The study found that adding mass transfer to the model significantly improves glycerol conversion rates.
Article
Chemistry, Multidisciplinary
Ajaysing S. Nimbalkar, Kyung-Ryul Oh, Seung Ju Han, Gwang-Nam Yun, Seung Hyeok Cha, Pravin P. Upare, Ali Awad, Dong Won Hwang, Young Kyu Hwang
Summary: The successful synthesis of finely tuned Ni1.5Sn nanoalloy phases from a mixed-metal zeolitic imidazolate framework (MM-ZIF) and its catalytic performance in the production of 1,2-propanediol (1,2-PDO) were investigated. The results demonstrated that the synergy between Ni-Sn alloy, finely dispersed Ni metallic sites, and the Lewis acidity of SnOx species-loaded ZnO played a pivotal role in the high activity and selectivity of the catalyst.
Article
Thermodynamics
Qicheng Chen, Nan He, Jing Fan, Fenhong Song
Summary: Deep eutectic solvents (DESs) as analogs of ionic liquids, with advantages such as low melting points, low vapor pressure, high thermal stability, have been widely studied and utilized in various fields. In this study, nine DESs prepared using different hydrogen bond acceptors and donors were investigated for their thermal conductivity in a large temperature range with good uncertainty.
THERMOCHIMICA ACTA
(2021)