Article
Thermodynamics
Yukai Li, Shaozeng Sun, Dongdong Feng, Wenda Zhang, Yijun Zhao, Yukun Qin
Summary: Syngas tempering technology is a method to consume excess O2 in flue gas and increase the reactivity of reburning coal to reduce NO emissions. Experimental results showed that syngas tempering increased the specific surface area and pore volume of char, while decreasing the content of oxygen-containing groups and increasing the content of alkyl groups. CH4 exhibited a better tempering effect than H2, while the effect of CO was not significant. The study provides insights for improving the removal efficiency of existing pulverized coal reburning for NOx emissions reduction.
Review
Chemistry, Multidisciplinary
Rui Moreira, Fernando Bimbela, Noemi Gil-Lalaguna, Jose Luis Sanchez, Antonio Portugal
Summary: This review discusses the current status and future prospects of char gasification technologies, highlighting the lack of extensive research in this area compared to lignocellulosic biomass gasification. It focuses on studies conducted in industrially relevant reactors and the opportunities presented by process intensification through microwave heating.
JOURNAL OF INDUSTRIAL AND ENGINEERING CHEMISTRY
(2021)
Article
Energy & Fuels
Chenlong Liu, Dengke Chen, Qianlin Tang, Siddig Abuelgasim, Chenghua Xu, Jing Luo, Zhihua Zhao, Atif Abdalazeez
Summary: This study investigated the production of hydrogen-rich syngas using two spinel oxygen carriers. NiMn2O4 showed higher reactivity and redox performance, and its phase and structure changes promoted hydrogen generation. On the other hand, NiFe2O4 exhibited different reduction behavior. The proposed reaction process and optimum conditions were also discussed.
Review
Chemistry, Applied
Jie Ren, Jing-Pei Cao, Xiao-Yan Zhao, Yi-Ling Liu
Summary: In recent decades, the focus of research has shifted towards producing value-added chemicals from biomass through gasification into syngas for further conversion into various products. Heterogeneous catalyst design plays a crucial role in reducing tar formation during biomass gasification, with char and char-supported catalysts emerging as effective alternatives due to their chemical inertness, cost-effectiveness, and excellent pore structures. The modification and functionalization of char through doping and metal addition show potential for enhancing the activity of these catalysts in tar reforming, highlighting the importance of sustainable fuel development and green practices.
FUEL PROCESSING TECHNOLOGY
(2021)
Article
Energy & Fuels
Ivan Sampron, Luis F. de Diego, Francisco Garcia-Labiano, Maria T. Izquierdo
Summary: This study investigates the impact of different iron content oxygen carriers on the performance of the BCLG system. The research indicates that oxygen carriers with varying iron levels exhibit similar gasification parameters and tar production under changes in oxygen-to-fuel ratio and fuel reactor temperature.
Article
Energy & Fuels
Shiyu Zhang, Mengna Wu, Zheng Qian, Qinghai Li, Yanguo Zhang, Hui Zhou
Summary: The advancement of biomass utilization technology is crucial for addressing global climate change and the depletion of fossil resources. This study investigates the production of CO-rich syngas from the CO2 gasification-reforming of biomass components. The results show that using nanorod CeO2 supported Ni catalysts can enhance volatile CO2 reforming reactions and significantly increase gas yield. The structure and stability of the catalysts were characterized for further understanding.
Article
Engineering, Environmental
S. Senorans, J. R-Diaz, D. Escalante, L. A. Gonzalez, L. Diaz
Summary: This study focused on the synthesis and characterization of catalysts-based cerium and nickel supported on pumice stone for the gasification process. The effects of the catalyst on the gasification process were investigated, and gas composition was compared with noncatalytic thermochemical processes. The results showed that the catalytic gasification process resulted in lower temperatures for gas production, and the incorporation of cerium and nickel increased the gasification rate. Catalytic biomass gasification is an innovative technology with potential for renewable energy research and the creation of green jobs.
Article
Energy & Fuels
Michela Costa, Maurizio La Villetta, Daniele Piazzullo, Domenico Cirillo
Summary: A one-dimensional phenomenological model for biomass gasification in downdraft reactors was developed and experimentally validated. The model showed good agreement with locally measured temperature, pressure drop, and gas composition along the reactor axis. Parametric analyses revealed the impact of porosity and biomass moisture content on the gasification process.
Article
Energy & Fuels
Yanping Zhou
Summary: This study focuses on the co-production of bio-char and syngas during pinewood pellet gasification. An experiment and a detailed kinetic gasification model were conducted to investigate the effects of temperature, equivalence ratio (ER), and steam amount on the co-products. The results show that the bio-char yield is about 22.8% and the concentration of H2 and CO in the syngas increases with the increasing ER.
BIOMASS CONVERSION AND BIOREFINERY
(2023)
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
Energy & Fuels
Muhammad Irfan, Aimin Li, Lei Zhang, Jianhua Liu, Tanzeel Javaid Aini Farooqi, Muhammad Javid, Abdul Rauf
Summary: In this study, waste tire-derived char was used as a support material for developing Ni-Fe-based catalysts, which significantly enhanced the performance in wet MSW catalytic conversion by boosting H-2 concentration, dry gas yield, and H-2 yield while reducing tar content. The tar analysis revealed a significant transformation in chemical composition with the application of catalysts. This work highlights the potential of utilizing waste tire-derived char as an effective and inexpensive support material for developing catalysts for MSW conversion.
INTERNATIONAL JOURNAL OF ENERGY RESEARCH
(2022)
Article
Thermodynamics
Ruochen Wu, Jacob Beutler, Larry L. Baxter
Summary: This investigation examines the trends in biomass char diameter during gasification using continuous particle size data and a theoretical model to describe the variations. The model captures the qualitative and most of the quantitative variation in the data.
Review
Energy & Fuels
Praveen Kumar Ghodke, Amit Kumar Sharma, Arun Jayaseelan, K. P. Gopinath
Summary: The increasing global population growth, modernization, and industrialization have led to a significant rise in energy consumption, resulting in worsened climate conditions and greenhouse gas emissions. As a result, researchers are exploring eco-friendly and sustainable energy sources, with hydrogen (H2) emerging as a clean and carbon-free future energy carrier. Thermochemical routes and the use of lignocellulosic biomass have shown great potential for sustainable H2 production. This study provides an overview of advancements in gasification technologies, operating conditions, catalysts, and emerging technologies for improving H2-rich syngas production.
Article
Thermodynamics
Wen Tang, Jing-Pei Cao, Zhi-Hao Wang, Zi-Meng He, Tian-Long Liu, Ze-Ying Wang, Fei-Long Yang, Jie Ren, Xiao-Yan Zhao, Xiao-Bo Feng, Hong-Cun Bai
Summary: The study demonstrates that using acid-washed and oxidized Shengli lignite char as a carbon precursor to load cobalt nano-catalyst shows higher activity and stability in low temperature steam reforming of biomass tar, with relatively high H-2 production and low E-a value.
ENERGY CONVERSION AND MANAGEMENT
(2021)
Article
Agricultural Engineering
G. Grasa, I. Martinez, R. Murillo
Summary: Gasification kinetics of six chars from residual origin were studied under relatively low temperature, low CO2, and high H2O partial pressures. The Random Pore Model (RPM) showed the best fit to experimental results, but the selection of the reaction model depended on the ash composition, specifically the presence of alkali and alkaline earth metals. Chars with ash content higher than 30% wt. were modeled with the RPM model, while chars with the highest K/Si ratio required modified versions of the RPM to accurately predict reaction rates. Textural properties played a key role in determining reaction parameters, such as the pre-exponential factor and activation energy, for chars with similar ash content and composition.
BIOMASS & BIOENERGY
(2024)
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)