Article
Engineering, Chemical
Yexin Hu, Yanru Zhang, Xing Fu, Dianyong Tang, Hui Li, Ping Hu, Liangfang Zhu, Changwei Hu
Summary: The presence of NaCl in water inhibits the degradation of fructose and reduces the formation of unwanted byproducts, but promotes the formation of soluble humins.
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
(2022)
Article
Chemistry, Physical
Panya Maneechakr, Irwan Kurnia, Asep Bayu, Obie Farobie, Chanatip Samart, Suwadee Kongparakul, Guoqing Guan, Surachai Karnjanakom
Summary: This study focuses on the catalytic/reusable capabilities for green production of 5-HMF from commercial sucrose. The sulfonic-magnetic-copper carbonized carbon (S@Fe-Cu-C) catalyst and choline chloride (ChCl) were found to have high catalytic efficiency for the selective production of 5-HMF. The highest yield achieved was 86.7%. The catalyst showed excellent reusability for up to 10 cycles without significant decrease in 5-HMF yield.
SUSTAINABLE ENERGY & FUELS
(2023)
Article
Agricultural Engineering
Paula Rapado, Laura Faba, Salvador Ordonez
Summary: This study investigated the effects of oxidative and reductive delignification processes on the hydrolysis of pine sawdust, finding that pretreated sawdust significantly improved hydrolysis efficiency and product selectivity, with reduced energy activation for all individual steps in the process.
BIORESOURCE TECHNOLOGY
(2021)
Article
Engineering, Chemical
Haoxiang Zhu, Youdi Zhang, Xusheng Guo, Youwei Cheng, Lijun Wang, Xi Li
Summary: In this study, the factors influencing the one-pot production of HMF from glucose in an acetone-water solvent were experimentally investigated. By optimizing the parameters, a high HMF yield was achieved and an economic and efficient HMF production process was proposed, providing support for subsequent industrial demonstration development.
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
(2022)
Article
Chemistry, Multidisciplinary
Sadra Souzanchi, Laleh Nazari, Kasanneni Tirumala Venkateswara Rao, Zhongshun Yuan, Zhongchao Tan, Chunbao Charles Xu
Summary: This study aimed to produce 5-HMF from glucose using NbP catalyst in a biphasic continuous flow reactor, achieving high yield and demonstrating the benefits of reducing A/O ratio and increasing reaction temperature for the catalytic reaction. The kinetics study showed that the glucose dehydration reaction to 5-HMF over NbP catalyst is a first-order reaction.
JOURNAL OF INDUSTRIAL AND ENGINEERING CHEMISTRY
(2021)
Article
Multidisciplinary Sciences
Ryoya Ito, Hisashi Miyafuji
Summary: The production of 5-hydroxymethylfurfural (5-HMF) from Japanese cedar using an ionic liquid, 1-methylimidazolium hydrogen sulfate ([MIM]HSO4), was studied. Among the three reaction systems investigated, the one combining [MIM]HSO4 treatment with vacuum steam distillation proved to be the most effective, achieving a maximum yield of 17.5 wt% after 45 minutes at 160 degrees C. This method is suitable for 5-HMF production as it is a one-pot process without the need for catalysts or pretreatment.
SCIENTIFIC REPORTS
(2021)
Article
Energy & Fuels
Phan Huy Hoang, Thai Dinh Cuong
Summary: A feasible catalytic process was developed for the simultaneous direct production of 5-hydroxymethylfurfural (HMF) and furfural from corncob biomass. By optimizing the conditions, the yields of HMF and furfural were significantly improved while the formation of levulinic acid was reduced.
Article
Chemistry, Multidisciplinary
Yao Shen, Fang Lin, Kang Wang, Xitao Wang
Summary: By doping CaO, alkyl grafting and NbCl5 impregnation on γ-Al2O3 beads, an efficient catalyst was constructed for the conversion of glucose to 5-HMF. Under suitable reaction conditions, complete conversion of glucose and high yield of 5-HMF can be achieved.
NEW JOURNAL OF CHEMISTRY
(2023)
Editorial Material
Neurosciences
Jessica T. Y. Yue, Frank A. Duca, Tony K. T. Lam
Summary: A recent study found that the duodenum can distinguish between sugar and sweeteners, but the specific cells involved in this process remain unknown. Researchers engineered a flexible optic fiber for optogenetic manipulation of gut cells in mice, and found that silencing CCK cells in the duodenum reduced the preference for sugar and increased the intake of sweeteners. This study suggests that gut optogenetics may provide insights into how the gut-brain axis regulates feeding and glucose homeostasis.
NATURE NEUROSCIENCE
(2022)
Article
Engineering, Chemical
Xusheng Guo, Haoxiang Zhu, Yuxi Si, Xilei Lyu, Youwei Cheng, Liping Zheng, Lijun Wang, Xi Li
Summary: In this study, a cheap and efficient deep eutectic solvent was developed for the conversion of glucose and other carbohydrates to 5-Hydroxymethylfurfural (HMF). The high HMF yields achieved from various carbohydrates make this system a promising method for HMF synthesis. The identification of the active species in the solvent provides a basis for future research on the dehydration mechanisms.
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
(2022)
Article
Chemistry, Applied
Richa Tomer, Prakash Biswas
Summary: A highly active and selective mesoporous TiO2 catalyst was developed for the conversion of glucose to 5-HMF. The reaction conditions were optimized using response surface methodology, and the catalyst was proven to be recyclable and the 5-HMF can be easily extracted from the product mixture with high purity.
Article
Chemistry, Multidisciplinary
Thien-Hang Thi Nguyen, Ha Bich Phan, Trinh Hao Nguyen, Kim Nguyen Tran, Linh Ho Thuy Nguyen, Tan Le Hoang Doan, Phuong Hoang Tran
Summary: In this study, three carbon-based solid acid catalysts were prepared using glucose and Bronsted acid. The catalysts were tested for their ability to convert cellulose into valuable chemicals. The as-synthesized C-H2SO4 catalyst showed high activity and yield in converting cellulose into valuable chemicals in the presence of [EMIM]Cl solvent at 120 degrees C in 24 h. The proposed mechanism for cellulose conversion was also presented.
Article
Chemistry, Multidisciplinary
Arvind Singh Chauhan, Ajay Kumar, Rohit Bains, Pralay Das
Summary: A metal catalyst free synthesis of 2,5-diformylfuran from fructose using a one-pot greener approach was achieved with the use of a user-friendly solid acid. The process exhibited high chemo-selectivity, recyclability of the solid acid, scalability, and environmentally benign features. It also showed acceptable yields when applied to various low-cost feedstocks.
Article
Chemistry, Physical
Charf Eddine Bounoukta, Cristina Megias-Sayago, Svetlana Ivanova, Anna Penkova, Fatima Ammari, Miguel Angel Centeno, Jose Antonio Odriozola
Summary: A series of -SO3R functionalized activated carbons (R=H, O, aryl) were prepared and utilized in fructose dehydration reaction to produce 5-hydroxymethylfurfural. Different sulphonating methods were used to introduce groups on the catalyst surface, affecting the textural and chemical properties of the activated carbon as well as the yields and selectivity of the reaction. The feasibility of a solvent-free reaction was investigated and compared to a reaction with DMSO, with the best catalytic results obtained in the presence of DMSO.
APPLIED CATALYSIS A-GENERAL
(2021)
Article
Chemistry, Multidisciplinary
Alicia Coloma, Alexandra Velty, Urbano Diaz
Summary: In this study, a one-pot synthesis method was presented to generate functionalized organosilica nanoparticles for the synthesis of multi-functional hybrid catalysts. Various organic functional elements were covalently incorporated onto the surface of the nanoparticles, allowing for the generation of hybrid spherical nanoparticles with tunable acidic, basic, and amphiphilic properties. The physico-chemical properties of the hybrid materials were fully characterized, and the potential uses of these materials as catalysts for biomass conversion were evaluated.
Article
Energy & Fuels
Manuel C. Bauer, Philipp Konnerth, Andrea Kruse
Summary: Liquefied dimethyl ether (DME) is a promising, green solvent for biomass lipid extractions. This study examines its use with four microalgae and cyanobacteria species, and finds that cryo-milling increases oil yield and improves fatty acid composition.
BIOMASS CONVERSION AND BIOREFINERY
(2023)
Article
Engineering, Chemical
Edmund Henrich, Nicolaus Dahmen, Stephan Pitter, Joerg Sauer
Summary: Founded in 1959, the Institute for Hot Chemistry in Karlsruhe initially focused on developing a reprocessing process for spent nuclear fuel, later transitioning to research on environmental and energy-related topics. During the transition period, the institute also actively participated in international collaboration projects, including the GALLEX experiment.
CHEMIE INGENIEUR TECHNIK
(2021)
Article
Engineering, Chemical
Marius Drexler, Philipp Haltenort, Ulrich Arnold, Joerg Sauer
Summary: Oxymethylene ethers (OME) are a promising alternative to fossil diesel fuel due to their significantly reduced emissions. An anhydrous, liquid phase production process using dimethyl ether (DME) has been developed, offering high selectivity and economic advantages. Catalyst screening and continuous production have provided insights into catalyst properties and kinetics, contributing to a better understanding of OME formation.
CHEMIE INGENIEUR TECHNIK
(2022)
Review
Engineering, Chemical
Soudeh Banivaheb, Stephan Pitter, Karla Herrera Delgado, Michael Rubin, Joerg Sauer, Roland Dittmeyer
Summary: This review article focuses on the importance of PtX technologies in the future energy system based on renewable sources, particularly discussing the application of dimethyl ether (DME) as an intermediate in the production of CO2-neutral base chemicals. The article summarizes recent developments in methanol and direct DME synthesis, with a special emphasis on modeling and bifunctional catalysts.
CHEMIE INGENIEUR TECHNIK
(2022)
Article
Chemistry, Multidisciplinary
Stefan Wild, Bruno Lacerda de Oliveira Campos, Thomas A. Zevaco, David Guse, Matthias Kind, Stephan Pitter, Karla Herrera Delgado, Joerg Sauer
Summary: Experimental kinetics studies and model-based optimization were conducted to investigate the direct synthesis of dimethyl ether (DME) under a wide range of process conditions. The study proposed an optimized ratio of CuO/ZnO/ZrO2 : H-FER 20 for improved DME productivity.
REACTION CHEMISTRY & ENGINEERING
(2022)
Review
Chemistry, Physical
Franz Mantei, Ramy E. Ali, Cornelie Baensch, Simon Voelker, Philipp Haltenort, Jakob Burger, Ralph-Uwe Dietrich, Niklas von der Assen, Achim Schaadt, Jorg Sauer, Ouda Salem
Summary: OME shows promising fuel properties and potential for reducing local emissions, but sustainable large-scale production processes have not been developed yet.
SUSTAINABLE ENERGY & FUELS
(2022)
Article
Chemistry, Physical
Nirvana Delgado Otalvaro, Pembe Guel Bilir, Karla Herrera Delgado, Stephan Pitter, Joerg Sauer
Summary: Hybrid kinetic models combine the advantages of system knowledge and data-based models, allowing for more accurate description and evaluation of the effects of multiple variables in complex chemical processes.
Article
Engineering, Chemical
Bruno Lacerda de Oliveira Campos, Kelechi John, Philipp Beeskow, Karla Herrera Delgado, Stephan Pitter, Nicolaus Dahmen, Jörg Sauer
Summary: This work evaluates the addition of intermediate condensation units between reaction steps to increase CO2 conversion to methanol. The new process achieved a significantly higher conversion rate compared to the conventional approach, reducing both operating costs and investment.
Article
Agricultural Engineering
Matthias Betz, Constantin Fuchs, Thomas A. Zevaco, Ulrich Arnold, Jorg Sauer
Summary: In the field of gasoline synthesis from renewable resources, highly integrated procedures are crucial for efficient and sustainable production. Ethylene oligomerization can produce gasoline-type hydrocarbons. Temperature and pressure significantly affect the selectivity and intramolecular branching. The catalyst showed stable performance under the tested conditions.
BIOMASS & BIOENERGY
(2022)
Review
Engineering, Chemical
Lukas Perret, Bruno Lacerda de Oliveira Campos, Karla Herrera Delgado, Thomas A. Zevaco, Anke Neumann, Joerg Sauer
Summary: This review provides a comparison of different reaction paths, operating conditions, and product recovery between heterogeneous catalysis and anaerobic syngas fermentation for the conversion of synthesis gas. While the mass-specific productivity is similar for both technologies, the space-time yield of heterogeneous catalysis is significantly higher.
CHEMIE INGENIEUR TECHNIK
(2022)
Article
Chemistry, Physical
Kalim A. Sheikh, Ricki Drexler, Thomas A. Zevaco, Joerg Sauer, Michael Bender
Summary: Oxygenate fuels are a promising solution for reducing urban air pollution by significantly decreasing soot emissions. This study focuses on the synthesis, characterization, and testing of ruthenium on alumina catalysts for the methanol-mediated CO hydrogenation towards oxygenates with the formaldehyde oxidation state. By varying the synthesis parameters, interesting correlations between synthesis parameters, final metal loading, crystallite sizes, and catalyst activity were observed. The catalysts were tested in a high-pressure reactor plant, and valuable insights into the relationships between catalyst synthesis, structure, and activity were obtained.
Article
Engineering, Chemical
Julian Dutzi, Nikolaos Boukis, Jorg Sauer
Summary: The influence of process water recycling in Supercritical Water Gasification of dry biomasses was studied. Dilution of dry biomass with water is required for supercritical water gasification. Recycling of process effluent is attractive due to cost-intensive wastewater treatment. Salt separation is necessary to prevent accumulation of salts in the effluents. Gasification of Reed Canary Grass and grapevines did not affect the composition of the product gas. Carbon efficiency decreased by 4% when wastewater was used for biomass dilution. Increase in organic carbon and potassium content was observed in the reactor effluent after gasification with recycled process effluent. Careful monitoring and adjustment of potassium hydroxide addition is required based on the reactor effluent's potassium content. Insufficient salt separation leads to formation of solid deposits in the reaction system.
Article
Energy & Fuels
Katrin Stoekle, Dennis Jung, Andrea Kruse
Summary: Chicory roots are a low-cost agricultural residue that can be used as a feedstock for producing 5-Hydroxymethylfurfural (HMF). In this study, two methods were investigated to increase the fructose content in the extracted inulin and fructose from chicory roots. The first method involved acid-assisted extraction, while the second method involved aqueous extraction followed by nitric acid hydrolysis. It was found that separating extraction and hydrolysis was more suitable for integrating this process into a biorefinery concept for HMF production.
BIOMASS CONVERSION AND BIOREFINERY
(2023)
Article
Chemistry, Physical
Marius Drexler, Philipp Haltenort, Thomas A. Zevaco, Ulrich Arnold, Joerg Sauer
Summary: Oxymethylene ethers (OMEs) are intensively researched, especially those of the CH3O(CH2O)(n)CH3 type. Oxymethylene dialkyl ethers (OMDAEs) have been studied to a lesser extent but exhibit properties similar to conventional diesel fuels. Tools for predicting properties have been developed based on experimental data.
SUSTAINABLE ENERGY & FUELS
(2021)
Article
Chemistry, Multidisciplinary
Nirvana Delgado Otalvaro, Gerardo Sogne, Karla Herrera Delgado, Stefan Wild, Stephan Pitter, Joerg Sauer
Summary: The one-step synthesis of dimethyl ether over mechanical mixtures of Cu/ZnO/Al2O3 and gamma-Al2O3 was examined under various process conditions. Results showed that elevated temperature, low CO2 content in the feed, and a specific weight ratio of CZA-to-gamma-Al2O3 are favorable for DME production. Additionally, a lumped kinetic model was developed to predict DME formation, providing one of the most comprehensive predictive models in the literature for the CZA/gamma-Al2O3 system.
