Article
Thermodynamics
Enara Fernandez, Laura Santamaria, Maider Amutio, Maite Artetxe, Aitor Arregi, Gartzen Lopez, Javier Bilbao, Martin Olazar
Summary: The steam pyrolysis of pinewood sawdust yielded high bio-oil production potential, with increased gas and decreased liquid and char yields as temperature rose. The composition of the liquid fraction was significantly influenced by temperature, with varying components.
Article
Energy & Fuels
Maria Cortazar, Jon Alvarez, Gartzen Lopez, Maider Amutio, Maite Artetxe, Javier Bilbao, Martin Olazar
Summary: The combination of delocalized units for biomass pyrolysis and centralized units for bio-oil gasification is an economically attractive option for full-scale syngas production. The study focuses on validating a bio-oil feeding device and assessing the effect of gasification temperature on gas properties and conversion efficiency. The results show that increasing temperature promotes tar reduction, carbon conversion efficiency, and gas yield.
Article
Thermodynamics
Shiliang Yang, Ruihan Dong, Yanxiang Du, Shuai Wang, Hua Wang
Summary: The study investigates the physical and thermochemical characteristics of biomass pyrolysis in a lab-scale spouted bed reactor using a reactive multiphase particle-in-cell approach. Results show that the distribution of biomass particles affects the spatial distributions of gas thermochemical properties. Intensive turbulent flow of gas phase exists in the spout region, which is enhanced with increasing gas inlet velocity and pyrolysis temperature.
Article
Engineering, Environmental
Jian-ping Li, Yao Wang, Yu-long Chang, Yuan Huang, Xia Jiang, Hua-lin Wang, Li-quan Li, Chong-gang Chen, Ying Zhao, Yuan-ping Yuan
Summary: The self-rotation of particles in an axial-flow hydrocyclone can increase the deoiling efficiency of catalysts, thus prolonging the catalyst lifespan in an ebullated bed reactor and making biomass pyrolysis oils hydrogenation more competitive.
CHEMICAL ENGINEERING JOURNAL
(2021)
Article
Chemistry, Multidisciplinary
Richard J. French, Kristiina Iisa, Kellene A. Orton, Michael B. Griffin, Earl Christensen, Stuart Black, Kathleen Brown, Scott E. Palmer, Joshua A. Schaidle, Calvin Mukarakate, Thomas D. Foust
Summary: Catalytic fast pyrolysis (CFP) with a bifunctional metal-acid catalyst and co-fed H-2 gas has improved product yield and reduced coke generation. Further process optimization includes extending time-on-stream, reducing required regeneration time, and lowering catalyst and equipment costs.
ACS SUSTAINABLE CHEMISTRY & ENGINEERING
(2021)
Article
Chemistry, Multidisciplinary
M. Cortazar, L. Santamaria, G. Lopez, J. Alvarez, M. Amutio, J. Bilbao, M. Olazar
Summary: The study investigated the performance of Fe/olivine catalysts in biomass steam gasification, showing significant efficiency improvement in the gasification process, particularly in tar reduction.
JOURNAL OF INDUSTRIAL AND ENGINEERING CHEMISTRY
(2021)
Article
Agricultural Engineering
Dadi V. Suriapparao, Ribhu Gautam, Lakshmana Rao Jeeru
Summary: Catalytic and non-catalytic microwave-assisted co-pyrolysis of biomass with plastics was conducted to investigate their interactions. The results showed that co-pyrolysis increased gas yields but reduced oil yields. The oil fraction derived from plastic pyrolysis contained more hydrocarbons, while biomass pyrolysis resulted in the formation of oxygenated compounds in the oil. A new parameter, the pyrolysis index, was introduced to measure pyrolysis intensity, and it was found to be higher for plastic pyrolysis than biomass pyrolysis, further increased by co-pyrolysis due to synergistic interactions.
BIORESOURCE TECHNOLOGY
(2022)
Article
Engineering, Environmental
Santiago Orozco, Laura Santamaria, Maite Artetxe, Jon Alvarez, Javier Bilbao, Martin Olazar, Gartzen Lopez
Summary: The continuous catalytic fast pyrolysis of plastics was studied using a conical spouted bed reactor equipped with a fountain confiner and draft tube. An inexpensive equilibrium fluid catalytic cracking (FCC) catalyst was used. Operating under oxidative conditions improved product distribution and catalyst activity and stability. The role of the presence of air in the reaction environment on catalyst stability and deactivation mechanism was assessed.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Agricultural Engineering
Jingyuan Shang, Guangbin Fu, Zhenping Cai, Xiang Feng, Yongxiao Tuo, Xin Zhou, Hao Yan, Chong Peng, Xin Jin, Yibin Liu, Xiaobo Chen, Chaohe Yang, De Chen
Summary: This study investigates the regulation of olefin or aromatics yields from ex-situ catalytic pyrolysis of pine by impregnating Sn on ZSM-5 catalysts, showing that Sn/ZSM-5 increased aromatics yield while Sn/M-ZSM-5 boosted olefins yield. The synergistic effect plays a significant role in manipulating the distribution of products.
BIORESOURCE TECHNOLOGY
(2021)
Article
Thermodynamics
Xiaojing Li, Pengpeng Yan, Chaofan Ma, Jiangjiang Wang
Summary: This study optimized the key structural parameters of a solar spouted bed reactor for biomass gasification through two-dimensional simulations using computational fluid dynamics software, and explored the effects of these parameters on syngas composition, temperature, lower heating value, carbon conversion, and gasification efficiency.
APPLIED THERMAL ENGINEERING
(2021)
Article
Chemistry, Multidisciplinary
Santiago Orozco, Gartzen Lopez, Mayra Alejandra Suarez, Maite Artetxe, Jon Alvarez, Javier Bilbao
Summary: The oxidative fast pyrolysis of plastics was studied in a conical spouted bed reactor using an inexpensive fluid catalytic cracking (FCC) spent catalyst. Operating under oxidative pyrolysis conditions significantly improved the FCC catalyst performance and increased the yield of light olefins.
ACS SUSTAINABLE CHEMISTRY & ENGINEERING
(2022)
Article
Thermodynamics
Haoran Sun, Shiliang Yang, Guirong Bao, Jianhang Hu, Hua Wang
Summary: Biomass fast pyrolysis is studied numerically in a conical fountain confined spouted fluidized bed. The presence of the fountain confiner increases the yields of Gas1 and tar. The study provides valuable insights into assisting designers in optimizing the design of such reactors.
Article
Engineering, Environmental
Shiliang Yang, Shuai Wang, Hua Wang
Summary: The study on biomass pyrolysis in a spouted bed reactor reveals that the heat transfer coefficient of particles varies with bed height and shows significant distribution differences in different regions. The temperature and heat transfer coefficient of biomass increase with the rise of pyrolysis temperature, while the effect of gas velocity on the heat transfer coefficient is insignificant.
CHEMICAL ENGINEERING JOURNAL
(2021)
Article
Chemistry, Analytical
Hoon Chae Park, Dong Won Yun, Myung Kyu Choi, Hang Seok Choi
Summary: In this study, a spouted-bed thermogravimetric analyzer (SB-TGA) was developed to accurately investigate the reaction models and kinetic parameters of spouted beds. The analyzer overcomes the disadvantages of conventional thermogravimetric analyzers that arise from different hydrodynamics. The experimental results demonstrate that the SB-TGA provides more reliable results for predicting the pyrolysis reaction in a spouted-bed.
JOURNAL OF ANALYTICAL AND APPLIED PYROLYSIS
(2022)
Article
Chemistry, Analytical
Bahar Hooshdaran, Masoud Haghshenasfard, Seyyed Hossein Hosseini, Mohsen Nasr Esfahany, Gartzen Lopez, Martin Olazar
Summary: This study applied a 2D Euler-Euler multiphase CFD model with the KTGF theory to describe biomass pyrolysis in a spouted bed reactor. By coupling a CFD hydrodynamic model with a pyrolysis kinetic model, the study successfully predicted biomass pyrolysis product yields, demonstrating the potential of CFD techniques for reactor design and optimization.
JOURNAL OF ANALYTICAL AND APPLIED PYROLYSIS
(2021)
Article
Chemistry, Physical
Zhiquan Zhou, Lu Han, Oscar Nordness, George M. Bollas
APPLIED CATALYSIS B-ENVIRONMENTAL
(2015)
Article
Chemistry, Multidisciplinary
Ari Fischer, Shoucheng Du, Julia A. Valla, George M. Bollas
Article
Computer Science, Interdisciplinary Applications
Kyle A. Palmer, George M. Bollas
COMPUTERS & CHEMICAL ENGINEERING
(2019)
Article
Agricultural Engineering
Shoucheng Du, Yijia Sun, David P. Gamliel, Julia A. Valla, George M. Bollas
BIORESOURCE TECHNOLOGY
(2014)
Article
Automation & Control Systems
Kyle A. Palmer, William T. Hale, George M. Bollas
IEEE TRANSACTIONS ON CONTROL SYSTEMS TECHNOLOGY
(2019)
Article
Chemistry, Physical
Zhiquan Zhou, Lu Han, George M. Bollas
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2014)
Article
Computer Science, Information Systems
William T. Hale, George M. Bollas
Article
Engineering, Chemical
Chen Chen, George M. Bollas
Article
Engineering, Chemical
Chen Chen, George M. Bollas
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
(2020)
Article
Automation & Control Systems
Kyle A. Palmer, George M. Bollas
Summary: The methodology presented in this study combines sensor selection and fault diagnosis test design for complex systems. By assessing sensor combinations and optimizing test designs based on information gain, the method demonstrates high correct classification rates and low false alarm rates in fault detection and isolation. The proposed approach effectively detects and isolates faults in systems with uncertainty.
IEEE TRANSACTIONS ON CONTROL SYSTEMS TECHNOLOGY
(2021)
Article
Chemistry, Multidisciplinary
Rajat Sainju, Dinithi Rathnayake, Haiyan Tan, George Bollas, Avinash M. Dongare, Steven L. Suib, Yuanyuan Zhu
Summary: The study found unexpected nanoparticle surface refacetting and size-dependent structural development and final NiO morphology during the thermal oxidation of Ni nanoparticles. A unified oxidation theory with a two-stage oxidation process was proposed for size-dependent Ni nanoparticle oxidation. Individual nanoparticle-level oxidation kinetics were established and correlated with nanoparticle microstructural evolution.
Article
Engineering, Chemical
Laron Burrows, George M. Bollas
Summary: Distributed ammonia production has the potential to revolutionize the food and energy industries. This study explores the technical feasibility of small-scale ammonia production systems and finds that they are more sensitive to disturbances compared to large-scale systems. Improved ammonia separation techniques and reactor designs can enhance the stability of small-scale ammonia synthesis reactors.
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
(2022)
Article
Engineering, Chemical
Adrian R. Irhamna, George M. Bollas
Summary: The Global Methane Pledge announced at COP26 aims to eliminate methane emissions worldwide. This study investigates the use of an intensified reactor based on the chemical looping principle to tackle lean methane emissions. A model-based framework demonstrates the baseline performance of the reactor in converting methane emissions. Sensitivity analysis reveals that the nickel percentage in the oxygen carrier, feed air temperature, feed air to flared gas ratio, and oxidation to reduction duration ratio significantly influence reactor performance. With optimization, near-complete methane conversion (> 98% methane conversion) is achieved by the reactor without external heating.
Article
Environmental Sciences
Xingyu Wang, Ishrat Rashid, Zhiyuan Zhao, Mayowa Oladele, Wenjun Xiang, Yuankai Huang, Edward Wazer, Jeffery McCutcheon, George Bollas, Jason Contreras, Baikun Li
Summary: Insufficient real-time in situ data and complicated model parameters hinder the accurate prediction and precise control of anaerobic digestion (AD) systems. This study addresses this challenge by developing an advanced data acquisition technology that integrates Milli-electrode Array Physical Sensors (MAPS) with Anaerobic Digestion model No.1-based Soft Sensors (ADSS) and an interpretable machine learning algorithm (MLA). The integrated MAPS-ADSS-MLA methodology significantly improves prediction accuracy compared to conventional MLA, and the study also identifies the indirect impacts of pH, alkalinity, and NH4+ on biogas production. This research presents an innovative AD-Data fusion platform for accurate and interpretable predictions in complex wastewater systems.
Article
Agricultural Engineering
Yinping Xiang, Meiying Jia, Rui Xu, Jialu Xu, Lele He, Haihao Peng, Weimin Sun, Dongbo Wang, Weiping Xiong, Zhaohui Yang
Summary: This study investigated the impact of the non-antibiotic pharmaceutical carbamazepine on antibiotic resistance genes (ARGs) during anaerobic digestion. The results showed that carbamazepine induced the enrichment of ARGs and increased the abundance of bacteria carrying these genes. It also facilitated microbial aggregation and intercellular communication, leading to an increased frequency of ARGs transmission. Moreover, carbamazepine promoted the acquisition of ARGs by pathogens and elevated their overall abundance.
BIORESOURCE TECHNOLOGY
(2024)
Review
Agricultural Engineering
Weixin Zhao, Tianyi Hu, Hao Ma, Dan Li, Qingliang Zhao, Junqiu Jiang, Liangliang Wei
Summary: This review summarizes the effects and potential mechanisms of biochar on microbial behavior in AD systems. The addition of biochar has been found to promote microbial colonization, alleviate stress, provide nutrients, and enhance enzyme activity. Future research directions include targeted design of biochar, in-depth study of microbial mechanisms, and improved models.
BIORESOURCE TECHNOLOGY
(2024)
Review
Agricultural Engineering
Christina Karmann, Anna Magrova, Pavel Jenicek, Jan Bartacek, Vojtech Kouba
Summary: This review assesses nitrogen removal technologies in reject water treatment, highlighting the differences in environmental impacts and economic benefits. Partial nitritation-anammox shows potential for economic benefits and positive environmental outcomes when operated and controlled properly.
BIORESOURCE TECHNOLOGY
(2024)
Article
Agricultural Engineering
Wei-Hao Huang, Ying-Ju Chang, Duu-Jong Lee
Summary: This study modified pinecone biochar with layered double hydroxide (LDH) to enhance its adsorption capacity for heavy metal and phosphate ions. The LDH-biochar showed significantly improved adsorption capacities for Pb2+ and phosphate, and a slight increase for Cu2+ and Co2+. The LDH layer enhanced the adsorption through various mechanisms.
BIORESOURCE TECHNOLOGY
(2024)
Article
Agricultural Engineering
Chao Song, Fanfan Cai, Shuang Yang, Ligong Wang, Guangqing Liu, Chang Chen
Summary: This paper developed a machine learning model to predict the biochemical methane potential during anaerobic digestion. Model analysis identified lignin content, organic loading, and nitrogen content as key attributes for methane production prediction. For feedstocks with high cellulose content, early methane production is lower but can be improved by prolonging digestion time. Moreover, lignin content exceeding a certain value significantly inhibits methane production.
BIORESOURCE TECHNOLOGY
(2024)
Article
Agricultural Engineering
Sang Min Lee, Ju Young Lee, Ji-Sook Hahn, Seung-Ho Baek
Summary: This study successfully developed an efficient platform strain using Yarrowia lipolytica for the bioconversion of renewable resources into adipic acid, achieving a remarkable increase in production level.
BIORESOURCE TECHNOLOGY
(2024)
Article
Agricultural Engineering
Sefkan Kendir, Matthias Franzreb
Summary: This study presents a novel approach using magnetic separation to efficiently harvest freshwater microalgae, Chlorella vulgaris. By combining pH-induced calcium phosphate precipitation with cheap natural magnetite microparticles, harvesting efficiencies up to 98% were achieved in the model medium.
BIORESOURCE TECHNOLOGY
(2024)
Article
Agricultural Engineering
Ishaq Kariim, Ji-Yeon Park, Wajahat Waheed Kazmi, Hulda Swai, In-Gu Lee, Thomas Kivevele
Summary: The impact of reaction temperature, residence time, and ethanol: acetone on the energy compositions and yield enhancement of biocrudes was investigated. The results showed that under appropriate conditions, biocrudes with high energy and low oxygen content can be obtained, indicating a high potential for utilization.
BIORESOURCE TECHNOLOGY
(2024)
Article
Agricultural Engineering
Xiyue Zhang, Xiyao Li, Liang Zhang, Yongzhen Peng
Summary: Intermittent aeration is an innovative approach to enhance nitrogen removal in low carbon-to-nitrogen ratio municipal sewage, providing an efficient strategy for the continuous plug-flow AOA process.
BIORESOURCE TECHNOLOGY
(2024)
Article
Agricultural Engineering
Xu Yang, Mahmoud Mazarji, Mengtong Li, Aohua Li, Ronghua Li, Zengqiang Zhang, Junting Pan
Summary: This study investigated the impact of magnetite on the nitrogen cycle of pig manure biostabilisation. The addition of magnetite increased N2O emissions and decreased NH3 emissions during composting. It also increased the total nitrogen content but should be considered for its significant increase in N2O emissions in engineering practice.
BIORESOURCE TECHNOLOGY
(2024)
Review
Agricultural Engineering
Ty Shitanaka, Haylee Fujioka, Muzammil Khan, Manpreet Kaur, Zhi-Yan Du, Samir Kumar Khanal
Summary: The market value of microalgae has exponentially increased in the past two decades, thanks to their applications in various industries. However, the supply of high-value microalgal bioproducts is limited due to several factors, and strategies are being explored to overcome these limitations and improve microalgae production, thus increasing the availability of algal-derived bioproducts in the market.
BIORESOURCE TECHNOLOGY
(2024)
Article
Agricultural Engineering
Martin Kerner, Thorsten Wolff, Torsten Brinkmann
Summary: The efficiency of using enriched CO2 from flue gas for large-scale production of green microalgae has been studied. The results show that the use of membrane devices and static mixers can effectively improve the CO2 recovery rate and maintain the suitable pH and temperature during cultivation, achieving a more economical and sustainable microalgae production.
BIORESOURCE TECHNOLOGY
(2024)
Article
Agricultural Engineering
Rui Ma, Ji Li, Rd Tyagi, Xiaolei Zhang
Summary: This review summarizes the microorganisms capable of using CO2 and CH4 to produce PHAs, illustrating the production process, factors influencing it, and discussing optimization techniques. It identifies the challenges and future prospects for developing economically viable PHAs production using GHGs as a carbon source.
BIORESOURCE TECHNOLOGY
(2024)
Article
Agricultural Engineering
Bing Wang, Peng Zhang, Xu Guo, Xu Bao, Junjie Tian, Guomin Li, Jian Zhang
Summary: The addition of zeolite in the co-composting of chicken manure and straw significantly reduced the emissions of ammonia and N2O, and increased the nitrate content. Zeolite also promoted the abundance of nitrification genes and inhibited the expression of denitrification genes.
BIORESOURCE TECHNOLOGY
(2024)
Article
Agricultural Engineering
Rohit Dey, Franziska Ortiz Tena, Song Wang, Josef Martin Messmann, Christian Steinweg, Claudia Thomsen, Clemens Posten, Stefan Leu, Matthias S. Ullrich, Laurenz Thomsen
Summary: This study investigated the operation of a 1000L microalgae-based membrane photobioreactor system for continuous secondary wastewater treatment. The research focused on a green microalgae strain called Desmodesmus sp. The study aimed to understand key trends and optimization strategies by conducting experiments in both summer and winter seasons. The findings showed that maintaining low cell concentrations during periods of light inhibition was beneficial for nutrient uptake rates. Effective strategies for enhancing algae-based wastewater treatment included cell mass recycling and adjusting dilution rates based on light availability.
BIORESOURCE TECHNOLOGY
(2024)
