Article
Energy & Fuels
Guang Yang, Yiran Liu, Lijuan Gao, Yingjie Su
Summary: The combustion characteristics and kinetic behavior of Anthracite (AN), Robinia pseudoacacia char (RPC) and their blends were studied using non-isothermal thermogravimetric analysis. RPC showed better combustion reactivity compared to AN, and the addition of RPC enhanced the combustion reactivity of AN. The synergistic effect was observed during co-combustion of AN and RPC.
JOURNAL OF THE ENERGY INSTITUTE
(2022)
Article
Thermodynamics
Guang Yang, Yiran Liu, Lijuan Gao, Yingjie Su
Summary: The co-combustion of biochar and coal has the potential to increase the proportion of renewable energy in carbon-intensive and energy-intensive industries. This study investigated the combustion behavior of anthracite and Robinia pseudoacacia char, and found that the addition of Robinia pseudoacacia char resulted in lower ignition temperature and longer burning time. The co-combustion process also exhibited interaction effects and reduced activation energy. Kinetic methods and mechanism function models were used to analyze the combustion kinetics and validate the results.
JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY
(2022)
Article
Energy & Fuels
Lian Ye, Jianliang Zhang, Runsheng Xu, Xiaojun Ning, Nan Zhang, Chen Wang, Xiaoming Mao, Jinhua Li, Guangwei Wang, Chuan Wang
Summary: This study investigates the physicochemical and co-combustion properties of hydrochar and anthracite. The results show that adding hydrochar can effectively improve the combustion efficiency of mixed fuel and reduce emissions.
Article
Thermodynamics
Leilei Dong, Alessio Alexiadis
Summary: A single particle reaction model is developed to investigate the char burnout characteristics of coal and biomass co-firing under air and oxy-fuel combustion conditions. The effects of biomass fraction, particle size, oxygen level, and gas temperature are studied. The proposed model is validated and found to require less simulation time and effort compared to traditional CFD simulation, while providing insights into char burnout characteristics in co-combustion process.
Article
Energy & Fuels
Jinhua Li, Runsheng Xu, Guangwei Wang, Jianliang Zhang, Bo Song, Wang Liang, Chuan Wang
Summary: Biomass residue hydmchar (BRC) has higher reactivity and better combustion characteristics, and its addition to anthracite can improve the combustion performance of anthracite with a noticeable synergistic effect during the combustion process of the mixture. The kinetic model shows that the random pore model (RPM) provides more accurate fitting for the combustion reaction.
Article
Green & Sustainable Science & Technology
Wang Liang, Xiaojun Ning, Guangwei Wang, Jianliang Zhang, Rongpeng Li, Weiwei Chang, Chuan Wang
Summary: The study found that the gasification reactivity of semi-coke is lower than bamboo reed char, but the addition of bamboo reed char can significantly enhance the gasification reaction performance. Experimental and theoretical results demonstrate the synergistic effect between bamboo reed char and semi-coke, and significant kinetic compensation effect was observed in the co-gasification reaction through kinetic fitting.
Article
Thermodynamics
Siqi Liu, Liping Wen, Yanqing Niu, Bokang Yan, Yu Lei, Denghui Wang, Shi'en Hui
Summary: The impact of CO2 on coal char combustion is complex due to its thermal and chemical effects. Experimental results show that carbon conversion ratios exhibit a V-type distribution with increasing CO2 concentrations, with minimum conversion points at 5-10%. The endothermicity effect of gasification reaction becomes more influential at higher CO2 concentrations.
COMBUSTION AND FLAME
(2022)
Article
Energy & Fuels
Riying Qi, Aihua Xiang, Mingfeng Wang, Enchen Jiang, Ziwei Li, Haobin Xiao, Xiongquan Tan
Summary: This study investigated the thermal decomposition kinetics of pyrolysis char using the isoconversional methods of Friedman and Ozawa. The results showed that the average values of activation energy and pre-exponential from the Ozawa method were higher than those of the Friedman method. Enthalpy analysis indicated that the energy difference between the activated complex and the reagent was consistent with the activation energy. The change in Gibbs free energy and entropy indicated a decrease in disorder degree of the products compared to the initial reactants. Additionally, the reaction mechanism shifted from random nucleation and growth reaction to nth order reaction at pyrolysis temperatures above 450 degrees C.
BIOMASS CONVERSION AND BIOREFINERY
(2022)
Article
Engineering, Environmental
Lei Pang, Yingjuan Shao, Wenqi Zhong, Hao Liu
Summary: Pressurized oxy-coal combustion has potential for high efficiency and low cost CO2 capture. Increased pressure and oxygen concentration reduce burnout time of char particles and improve their reactivity and temperature. A combustion model shows pressure's impact on char burnout time.
CHEMICAL ENGINEERING JOURNAL
(2021)
Article
Metallurgy & Metallurgical Engineering
Li-chun Yang, Qing-hai Pang, Zhi-jun He, Jun-hong Zhang, Wen-long Zhan, Nan Lu
Summary: The combustion behavior of pulverized coals is influenced by their functional group structures, with coals having highly active functional groups combusting more easily. Blends of anthracite (AT) and bituminite (BT) with similar functional group structures exhibit superior combustion properties, as the high activity of volatile components aids in facilitating combustion.
JOURNAL OF IRON AND STEEL RESEARCH INTERNATIONAL
(2021)
Article
Agricultural Engineering
Xudong Yang, Zhongyang Luo, Bichen Yan, Yinchen Wang, Chunjiang Yu
Summary: This study investigated the migration and transformation of nitrogen during biomass torrefaction combined with coal co-combustion. The XPS analysis showed that torrefaction in CO2 suppressed the conversion of nitrogen components. Additionally, torrefaction in a N2/O2 atmosphere at a lower temperature improved biomass properties and reduced NO emissions during co-combustion.
BIORESOURCE TECHNOLOGY
(2021)
Article
Thermodynamics
Yuan Yao, Aidin Panahi, Martin Schiemann, Yiannis A. Levendis
Summary: This research focuses on the size and overall porosity of carbonaceous chars produced during the pyrolysis and combustion of biomass under high-heating rates and temperatures. The study found that the generated chars were highly porous with large cavities.
COMBUSTION AND FLAME
(2022)
Article
Energy & Fuels
Shengguo Zhao, Liang Ding, Yun Ruan, Bin Bai, Zegang Qiu, Zhiqin Li
Summary: The study investigated the gasification characteristics of corn stalk char and the impact of alkali and alkali earth metals on gasification rate, with various models used to describe the gasification behavior. Results showed that the gasification rate of CSC was significantly influenced by steam partial pressure.
Article
Energy & Fuels
Christin Pflieger, Katrin Lotz, Nikoline Hilse, Cornelius M. Berger, Martin Schiemann, Paulo Debiagi, Christian Hasse, Viktor Scherer, Martin Muhler
Summary: The catalytic effects of mineral compounds on biomass-derived char were investigated using thermogravimetric analysis in various atmospheres. It was found that K2CO3 and Na2CO3 showed the most significant catalytic effects, while Fe2O3 had a weaker effect. Modeling approaches further quantified the catalytic effects and lowered the apparent activation energy.
Article
Green & Sustainable Science & Technology
Anjiang Gao, Kan Zou, Yao Wang, Guoming Gao, Maxim Penzik, Alexander N. Kozlov, Yusuf Makarfi Isa, Yong Huang, Shu Zhang
Summary: This paper investigated the synergistic effect of volatile-char interaction and temperature on the products generated from poplar pyrolysis. The research findings provide a basis for the accurate regulation of pyrolysis product distribution, with significant changes observed in the yields and characteristics of bio-oil, gas, and biochar under different conditions.
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)