Article
Biotechnology & Applied Microbiology
Nur Syakina Jamali, Jamaliah Md Jahim, Tabassum Mumtaz, Peer Mohamed Abdul
Summary: The study showed that Caldicellulosiruptor saccharolyticus performs well in hydrogen production using palm oil mill effluent, with the highest hydrogen productivity rates achieved under specific conditions. Immobilizing the bacteria on activated carbon shows promise in consistently achieving high hydrogen productivity rates in extreme thermophilic conditions.
ENVIRONMENTAL TECHNOLOGY & INNOVATION
(2021)
Article
Green & Sustainable Science & Technology
Sungyup Jung, Jechan Lee, Deok Hyun Moon, Ki-Hyun Kim, Eilhann E. Kwon
Summary: The review discusses the development of biogas dry reforming, focusing on the effects of biogas composition, reaction conditions, and impurities. Theoretical estimations and thermodynamic calculations demonstrate dry reforming as an effective option for biogas valorization. Challenges and potential future directions are highlighted to pave the way for hybrid biological/chemical processes for hydrogen production.
RENEWABLE & SUSTAINABLE ENERGY REVIEWS
(2021)
Review
Environmental Sciences
Velusamy Mozhiarasi, Thillai Sivakumar Natarajan, Kondusamy Dhamodharan
Summary: In recent years, there has been a growing demand for high-quality biofuels from renewable sources as a means to achieve a clean environment and meet future energy needs by replacing depleting fossil fuels. Research interest has focused on biohythane production from wastes, as it offers superior fuel characteristics compared to conventional biofuels such as biogas. This systematic review aims to promote research and explore the potential of biohythane production by examining various factors such as production pathways, substrate/microbial consortium suitability, reactor design, and process/operational factors. The study also highlights the importance of reactor configuration and addresses technical challenges, product optimization, scale-up, and policy considerations for building a hydrogen-based society.
ENVIRONMENTAL RESEARCH
(2023)
Article
Chemistry, Physical
Doan-Thanh Ta, Chiu-Yue Lin, Thi-Minh-Ngoc Ta, Chen-Yeon Chu
Summary: A novel single-reactor system has been developed for co-production of H2 and CH4. The study shows that a short pH shock can regulate the H2/CH4 composition without significantly affecting biogas yield and COD removal.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2022)
Review
Chemistry, Physical
Fatemeh Boshagh, Khosrow Rostami, Ed W. J. van Niel
Summary: This study investigates the application of kinetic models in dark fermentative hydrogen production, revealing that the modified Gompertz model is extensively used to describe the production of hydrogen, organic acids and alcohols, substrate degradation, and biomass growth. The development of kinetic models can help identify important variables, facilitate future research, and maximize hydrogen production.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2022)
Article
Agricultural Engineering
Seyedeh Azadeh Alavi-Borazjani, Luis Antonio da Cruz Tarelho, Maria Isabel Capela
Summary: This study investigated the effect of adding ash from combustion of different biomass types on H2 and CH4 production from organic solid waste. Results showed that specific concentrations could significantly increase H2 production rate and CH4 yield in the biohythane production process.
BIOMASS & BIOENERGY
(2022)
Article
Biotechnology & Applied Microbiology
Md. Abu Saleh, Shafi Mahmud, Sarah Albogami, Ahmed M. El-Shehawi, Gobindo Kumar Paul, Shirmin Islam, Amit Kumar Dutta, Md. Salah Uddin, Shahriar Zaman
Summary: In this study, a GH43 alpha-l-arabinofuranosidase/beta-xylosidase (CAX43) enzyme from Caldicellulosiruptor saccharolyticus was cloned and investigated. The enzyme exhibited high activity and synergy with xylanase under specific conditions. The interaction between the enzyme and various substrates was studied through simulation experiments.
FRONTIERS IN BIOENGINEERING AND BIOTECHNOLOGY
(2022)
Article
Green & Sustainable Science & Technology
Yasemin Dilsad Yilmazel, Metin Duran
Summary: Fermentation of cattle manure using Caldicellulosiruptor bescii resulted in high hydrogen production. Co-fermentation of cattle manure and switchgrass showed the highest antagonistic interaction. Wastewater biosolids produced more hydrogen than switchgrass as a co-substrate.
JOURNAL OF CLEANER PRODUCTION
(2021)
Review
Energy & Fuels
K. B. Sasidhar, P. Senthil Kumar, Leilei Xiao
Summary: With the increasing concern over global warming, a growing number of countries have joined the net-zero coalition to reduce fossil fuel consumption. Additionally, there is a strong focus on reducing the pollution load from waste biomass. Sequential biohydrogen and biomethane production has been found to offer operational stability, higher energy yield, and cleaner by-products. This review provides insights and discusses the challenges of scaling up biohydrogen and biomethane production, as well as the viability of Hythane as a clean and renewable fuel with over 40% reduction in carbon monoxide and carbon dioxide emissions.
Article
Chemistry, Physical
Mai-Linh Thi Nguyen, Pang-Chun Hung, Tan-Phat Vo, Chyi-How Lay, Chiu-Yue Lin
Summary: The study investigated the production of mesophilic biohythane gas in a bioreactor via single-stage dark fermentation, showing that the F/M ratio and fermentation time affect biohythane production efficiency. The maximum hydrogen production rate was 9.60 L/L-d, maximum methane production rate was 0.72 L/ L-d.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2021)
Article
Green & Sustainable Science & Technology
P. T. Couto, F. Eng, P. Bovio-Winkler, W. A. Cavalcante, C. Etchebehere, L. Fuentes, I. Nopens, M. Zaiat, R. Ribeiro
Summary: This study validated the acidogenesis of sugarcane vinasse in a batch bioreactor via acrylate and homoacetogenesis pathways through biomolecular analysis and quantitative assessment of microbial communities. It also proposed an improved model that integrated a new lactate consumption pathway and homoacetogenesis to accurately describe the system.
JOURNAL OF CLEANER PRODUCTION
(2022)
Article
Biotechnology & Applied Microbiology
Eoin Byrne, Johanna Bjorkmalm, James P. Bostick, Krishnan Sreenivas, Karin Willquist, Ed W. J. van Niel
Summary: The study developed Caldicellulosiruptor strains tolerant to higher sugar concentrations through adaptive laboratory evolution (ALE), with the mixed population C. owensensis CO80 demonstrating improved growth ability at 80g/L glucose but reduced hydrogen productivities and incomplete sugar conversion. The results indicate that ALE allows adaptation to elevated sugar concentrations, but may not necessarily improve fermentation performances at these higher sugar concentrations. Additionally, the co-cultivation experiment showed that the robustness of the CO80 mixed culture needs improvement for industrial application.
BIOTECHNOLOGY FOR BIOFUELS
(2021)
Article
Agriculture, Multidisciplinary
Lu Wang, Jiali Gu, Yinghui Feng, Mingming Wang, Yanjun Tong, Yingjie Liu, Xiaomei Lyu, Ruijin Yang
Summary: This study aimed to optimize the catalytic performances of CEs by flexible loop exchange, resulting in mutants with improved isomerization activity and thermostability. Molecular dynamics simulations showed that loop exchange enlarged the entrance of the active site for substrate binding and benefited proton transfer. This work demonstrated the importance of the flexible loop surrounding the active site in determining the isomerization activity and thermostability of CEs.
JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY
(2021)
Article
Green & Sustainable Science & Technology
C. Urtnowski-Morin, F. Tanguay-Rioux, R. Legros, L. Spreutels
Summary: Material flow analysis (MFA) is a valuable tool for decision making in waste management systems, relying on transfer coefficients to model flows of goods and substances. This study compared three levels of model complexity to upgrade MFA, showing that simpler models were sufficient to predict methane production while complex models were needed for behavior regarding nitrogen loss. Integrating the model in transient state was advantageous for nitrogen modelling, and upgrading MFA with a process model like ADM1 allows for better analysis of waste treatment processes.
JOURNAL OF CLEANER PRODUCTION
(2021)
Article
Green & Sustainable Science & Technology
Faraz Sufyan, Mehmood Ali, Sadia Khan, Nazia Hossain
Summary: This study investigated the production of bioenergy, specifically biohythane (a combination of biohydrogen and biomethane), from cow dung and untreated domestic wastewater sludge. The experimental results showed that the highest yields of biohydrogen and biomethane were obtained under specific temperature and pH conditions. Microorganisms played a crucial role in accelerating the conversion reaction, with different bacteria contributing differently under different pH conditions. The study also successfully modeled the experimental data, demonstrating the best-fit results for biohythane production. Overall, this research presented an effective pathway for utilizing untreated domestic wastewater sludge and showcased the potential of biohythane production across a wide range of pH conditions.
Article
Energy & Fuels
Anton Fagerstrom, Omar Abdelaziz, Sofia Poulikidou, Adam Lewren, Christian Hulteberg, Ola Wallberg, Tomas Rydberg
Summary: The potential of integrating bio-electro-jet fuel (BEJF) production into existing biomass-based combined heat and power (CHP) facilities was investigated in this study. Techno-economic and life cycle assessments were performed to evaluate the production cost and environmental impact. The findings highlight the resource-efficient, cost-effective, and environmentally benign nature of BEJF as an alternative for the aviation sector.
Article
Green & Sustainable Science & Technology
Yusuf Umar, Orlando Velasco, Omar Y. Abdelaziz, Omar Aboelazayem, Mamdouh A. Gadalla, Christian P. Hulteberg, Basudeb Saha
Summary: This study introduces an integrated lignin-glycerol valorisation strategy, where glycerol is used to depolymerise lignin and the generated bio-oil is used as a renewable additive to biodiesel to enhance its oxygen stability. Results show that glycerol has a positive impact on the yield and antioxidant activity of the bio-oil. Adding bio-oil to biodiesel significantly improves its oxidation stability.
Article
Chemistry, Multidisciplinary
Alexey Polukeev, Reine Wallenberg, Jens Uhlig, Christian P. Hulteberg, Ola F. Wendt
Summary: Convenient methods for on-board hydrogen storage and release are necessary for the large-scale use of hydrogen fuel cells. This study demonstrates the use of a continuous flow reactor and a heterogenized iridium pincer complex to significantly increase the dehydrogenation rates of liquid organic hydrogen carriers (LOHCs). This advancement holds potential for applications in fuel-cell powered cars.
Article
Polymer Science
Roujin Ghaffari, Henrik Almqvist, Robin Nilsson, Gunnar Liden, Anette Larsson
Summary: This study investigated the diffusion of kraft lignin molecules through model cellulose membranes of varying pore sizes. The results showed that small pore sizes enable the diffusion of small molecules while hindering the transport of larger molecules or clusters. This study provides important insights into the mass transfer events in pulping processes.
Article
Chemistry, Physical
Sabrina Maria Gericke, Jenny Rissler, Marie Bermeo, Harald Wallander, Hanna Karlsson, Linnea Kollberg, Mattia Scardamaglia, Robert Temperton, Suyun Zhu, Kajsa G. V. Sigfridsson Clauss, Christian Hulteberg, Andrey Shavorskiy, Lindsay Richard Merte, Maria Elise Messing, Johan Zetterberg, Sara Blomberg
Summary: Nickel-promoted molybdenum-based catalysts undergo oxidation-reduction reactions under high-pressure H-2 and elevated temperatures. The mixing of nickel and molybdenum lowers the reduction temperature of the oxide. The reduction process of the supported catalysts is more gradual compared to foils, indicating a strong interaction between the catalyst and the alumina support.
Article
Agricultural Engineering
Ada Josefina Robinson, Aristide Giuliano, Omar Y. Abdelaziz, Christian P. Hulteberg, Apostolis Koutinas, Konstantinos S. Triantafyllidis, Diego Barletta, Isabella De Bari
Summary: This study establishes an integrated optimization model to assess the profitability of converting lignin into high-added-value products. The results demonstrate that lignin can have a high market value with the use of key technologies, depending on the market prices of different products.
BIORESOURCE TECHNOLOGY
(2022)
Review
Chemistry, Multidisciplinary
Omar Y. Abdelaziz, Ida Clemmensen, Sebastian Meier, Carina A. E. Costa, Alirio E. Rodrigues, Christian P. Hulteberg, Anders Riisager
Summary: This review focuses on the conversion of technical lignins by oxidative depolymerization using heterogeneous catalysts. It summarizes the current literature on the use of various heterogeneous catalysts for oxidative depolymerization of lignin, including methods, reaction products and yields, as well as techniques for determining product yields and recovery. Challenges and suggestions for future research are also outlined.
Article
Biochemistry & Molecular Biology
Joana Campos, Lorenzo Garcia Tejada, Jie Bao, Gunnar Liden
Summary: The study focuses on the production of optically pure L-lactic acid (LA) from softwood hydrolysate with Pediococcus acidilactici TY112. It is found that the strain is capable of converting inhibitors and partly detoxifying the hydrolysate and synthetic media, indicating its potential for L-LA production.
PROCESS BIOCHEMISTRY
(2023)
Article
Chemistry, Applied
Tove Kristensen, Christian Hulteberg, Sara Blomberg, Per Tuna, Omar Abdelaziz
Summary: A study was conducted to evaluate the effects of temperature, pressure, and weight hourly space velocity on the catalytic hydrodeoxygenation of vanillin to cresol over a Ni-Mo/delta-Al2O3 catalyst. The results showed that both temperature and pressure had significant effects on the selectivity for cresol, and the interaction of temperature with pressure and space velocity also played a significant role in the reaction. The optimal conditions for obtaining the highest selectivity for cresol were determined to be 314℃, 5 bar, and 35 h(-)(1).
TOPICS IN CATALYSIS
(2023)
Article
Chemistry, Applied
Omar Y. Y. Abdelaziz, Ida Clemmensen, Sebastian Meier, Sasa Bjelic, Christian P. P. Hulteberg, Anders Riisager
Summary: Zirconia-supported vanadium-copper catalysts (VCux:yZr) were used to oxidatively depolymerize softwood LignoBoost Kraft lignin (LB). The most promising catalyst was VCu1:2Zr, which achieved a total monomer yield of 9 wt% and the highest selectivity for vanillin (59%). This study demonstrates the potential of the V-Cu/ZrO2 catalyst system in the production of value-added aromatics from technical lignin under relatively mild conditions, contributing to the more sustainable use of forest-based industries.
TOPICS IN CATALYSIS
(2023)
Review
Chemistry, Multidisciplinary
Dimitris D. S. Argyropoulos, Claudia Crestini, Christian Dahlstrand, Erik Furusjo, Claudio Gioia, Kerstin Jedvert, Gunnar Henriksson, Christian Hulteberg, Martin Lawoko, Clara Pierrou, Joseph S. M. Samec, Elena Subbotina, Henrik Wallmo, Martin Wimby
Summary: Kraft lignin, a by-product of pulp production, can be separated from black liquor to reduce the load on recovery boilers and increase pulp production, while also generating valuable bioenergy. In recent years, there has been growing interest in developing and utilizing this underutilized resource. This review provides an overview of Kraft lignin, its applications, and evaluates its value chains from black liquor to different products. It is anticipated that this work will inspire further development and use of Kraft lignin for new applications, promoting global sustainability concerns.
Article
Engineering, Chemical
Sixten Dahlbom, Christian Hulteberg
Summary: In this study, a method based on isothermal calorimetry and modeling is presented to estimate the risk of lagging fire or determine the maximum insulation thickness for a particular system temperature. The combination of mineral wool and rapeseed oil was studied, and full-scale tests were conducted to validate the results. Two methods of lagging contamination were evaluated, with the solvent method yielding more repeatable results. Using calorimetric measurements, parameters for the kinetic equation were estimated, and the self-ignition temperature of contaminated lagging on a pipe was determined based on these results. A temperature increase of 40 degrees Celsius was deemed a reasonable ignition criterion.
JOURNAL OF LOSS PREVENTION IN THE PROCESS INDUSTRIES
(2023)
Article
Chemistry, Physical
Tianhao Hu, Sabrina M. Gericke, Xiao Tong, Dmytro Nykypanchuk, Tove Kristensen, Christian Hulteberg, Dario Stacchiola, Sara Blomberg, Ashley R. Head
Summary: The conversion of biomass to transportation fuels and value-added chemicals is a promising method to reduce the reliance on fossil fuels, and Mo-based catalysts have been shown to be highly active in this process. This study investigates the adsorption behavior of an alumina-supported mixed nickel molybdenum oxide catalyst and finds that molybdenum oxide controls the adsorption and reactivity of the surface species with a cooperative effect by nickel.
JOURNAL OF PHYSICAL CHEMISTRY C
(2023)
Article
Chemistry, Physical
Kaushik Chakrabarti, Alice Spangenberg, Vasudevan Subramaniyan, Andreas Hederstedt, Omar Y. Abdelaziz, Alexey V. Polukeev, Reine Wallenberg, Christian P. Hulteberg, Ola F. Wendt
Summary: Finding alternative and sustainable ways to produce, store and convert energy, particularly hydrogen, is crucial for reducing carbon emissions. This study investigates the use of silica- and alumina-supported POCOP-Ir systems as catalysts for gas phase acceptorless dehydrogenation of 4-methylpiperidine, an organic hydrogen carrier. The newly designed POCOP-Ir complex with two anchors exhibits high activity and stability, making it a promising catalyst for hydrogen storage and conversion.
CATALYSIS SCIENCE & TECHNOLOGY
(2023)
Article
Biotechnology & Applied Microbiology
Joao R. M. Almeida, Magnus Wiman, Dominik Heer, Daniel P. Brink, Uwe Sauer, Baerbel Hahn-Hagerdal, Gunnar Liden, Marie F. Gorwa-Grauslund
Summary: To evaluate the capability of Saccharomyces cerevisiae to adapt to lignocellulosic hydrolysates, the physiological effect of cultivating yeast in spruce hydrolysate was comprehensively studied. The yeast developed a rapid adaptive response to lignocellulosic hydrolysate, significantly improving its fermentation performance in subsequent experiments. The adaptive response involved the induction of NADPH-dependent aldehyde reductases and conversion of phenolic compounds.
FERMENTATION-BASEL
(2023)
