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
Energy & Fuels
Jiehan Zhang, Mingyu Ma, Zhaohui Chen, Xinyu Zhang, Hang Yang, Xinkun Wang, Hongbo Feng, Jian Yu, Shiqiu Gao
Summary: Ex-situ catalytic pyrolysis of low-density polyethylene (LDPE) was performed using a two-stage fixed bed. Results showed that Ga/ZSM-5 and Ga/P/ZSM-5 catalysts were beneficial for the production of olefins and aromatics, and the introduction of P improved the selectivity of aromatics. Compared to in-situ catalytic pyrolysis, ex-situ catalytic pyrolysis was identified as a better method for processing plastic waste.
JOURNAL OF THE ENERGY INSTITUTE
(2023)
Article
Energy & Fuels
Daniel Takyi Sekyere, Jinhong Zhang, Yaozheng Chen, Yansheng Huang, Mengfei Wang, Jiaxu Wang, Noah Niwamanya, Andrew Barigye, Yuanyu Tian
Summary: This study investigates the co-pyrolysis of pine and LDPE over different catalysts and finds that the addition of catalyst can greatly enhance the production of light olefins and aromatics. The optimal base and acid catalysts are calcium aluminate and ZSM-5 with Si/Al ratio of 40, respectively. The findings provide important insights for the production of light olefins and BTX from the catalytic co-pyrolysis of biomass and plastics.
Article
Chemistry, Analytical
Oguzhan Akin, Robin John Varghese, Andreas Eschenbacher, Jogchum Oenema, Mehrdad Seifali Abbas-Abadi, Georgios D. Stefanidis, Kevin M. Van Geem
Summary: The effect of vapor-catalyst contact time and catalyst properties on the recovery of light olefins (C2-C4) from post-consumer mixed polyolefinic waste pyrolysis vapors was studied using five different solid acid catalysts. HZSM-5 with Si/Al ratio of 11 and 27 showed the highest light olefins yields at a very short contact time, while longer contact time decreased olefin yields and increased aromatics production. HZSM-22 was not effective in cracking pyrolysis vapors to C2-C4 olefins at a short contact time, but increasing contact time improved C2-C4 yields without increasing aromatics production, possibly due to its small pore size (shape selectivity). SAPO-34, SAPO-11, and Al-MCM-41 were not selective to light olefins at any studied contact time.
JOURNAL OF ANALYTICAL AND APPLIED PYROLYSIS
(2023)
Article
Energy & Fuels
Yujie Hou, Zongqing Bai, Hao Lu, Zhihao Feng, Tingting Zhang, Yuxing Jia, Zhenxing Guo, Lingxue Kong, Jin Bai, Wen Li
Summary: Low-cost kaolin modified by calcination and leaching was used as a catalyst for in-situ upgrading of Hami coal pyrolysis volatiles. The results showed that the modification process enhanced the formation of micro-/mesopores and acid sites, resulting in an increase in the light tar fraction and aromatic content in the tar. Acid-modified kaolin has the potential to be an inexpensive and efficient catalyst for upgrading coal pyrolysis tar.
Article
Chemistry, Multidisciplinary
Tao Liu, Jingkun Zhao, Xiaodong Zhang
Summary: In this study, in situ and ex situ catalytic pyrolysis techniques were employed for the directional conversion of volatile matter from low-rank coal (LRC). The use of ZSM-5 catalysts resulted in a reduction of tar complexity and an increase in the relative content of valuable compounds such as benzene, toluene, and xylene.
Article
Environmental Sciences
Qian He, Shengxiong Huang, Wei Luo, Yifeng Su, Mao Xia, Nan Zhou, Zhi Zhou
Summary: The study compared in-situ and ex-situ catalytic pyrolysis of oily sludge using CaO and oily pyrolysis char as catalysts. Results showed that CaO promoted the synthesis of aromatics, while char inhibited aromatic compounds and enhanced aliphatic compounds production. Gas chromatography analysis showed an increase in combustible gas content, especially in the char-CaO-i group, with higher combustion performance. Additionally, Fourier transform infrared spectroscopy indicated that char and CaO reduced functional group numbers in pyrolysis solids, suggesting a more complete pyrolysis reaction.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2021)
Article
Agricultural Engineering
Shuang Xue, Zhongyang Luo, Haoran Sun, Wanchen Zhu
Summary: In this study, modified bimetallic micro-mesoporous zeolite catalysts were prepared and successfully applied in the process of ex-situ catalytic fast pyrolysis of biomass, leading to an improvement in the quality of liquid fuel. The addition of clay catalysts and the use of a HAP&Zeolite dual catalyst system resulted in a decrease in coke yield. Real-time monitoring showed that the catalytic performance of zeolites began to decrease when the ratio of biomass and catalyst exceeded 1.
BIORESOURCE TECHNOLOGY
(2022)
Article
Environmental Sciences
Bo Li, Zehao Qian, Jie Qin, Qian He, Shengxiong Huang, Hang Dong, Nan Zhou, Mao Xia, Zhi Zhou
Summary: This study investigates the differences between in situ and ex situ catalytic fast pyrolysis methods for biomass treatment. It finds that both methods can improve the quality of bio-oil but decrease the yield. In situ CFP process prevents the transfer of heteroatoms to bio-oil while ex situ CFP process promotes the transfer. Additionally, ex situ CFP reaction significantly increases the content of aromatic hydrocarbons.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2022)
Article
Chemistry, Analytical
William de Rezende Locatel, Dorothee Laurenti, Yves Schuurman, Nolven Guilhaume
Summary: Ex-situ catalytic fast pyrolysis was used to produce bio-oils from beech wood with Nb-based mixed oxides catalysts. The Lewis acid sites of NbxMnyOz were found to perform similarly to the Brønsted sites of H-ZSM-5, effectively improving the quality and selectivity of bio-oils while reducing oxygen content.
JOURNAL OF ANALYTICAL AND APPLIED PYROLYSIS
(2021)
Article
Energy & Fuels
Candice R. Ellison, Dorin Boldor
Summary: This study investigates a low cost iron-based catalyst for mild in-situ upgrading of fast pyrolysis vapors, which can reduce pyrolysis liquid yields, increase gas yields, and produce a more stable liquid product. Increasing iron loading can decrease catalyst coking, but result in greater amounts of polyaromatics in the pyrolysis liquid. Upgraded pyrolysis liquids have lower concentrations of unstable carboxylic acids and aldehydes, with a shift towards a more stable liquid product. Iron-doped montmorillonite catalyst is demonstrated to be a viable, low cost catalyst for mild upgrading of fast pyrolysis vapors.
Article
Thermodynamics
Xiaopeng Shi, Pan Li, Xianhua Wang, Jiande Song, Shuqi Fang, Chun Chang, Shusheng Pang
Summary: The main purpose of this study was to investigate the effects of metal modified biochar and multi-catalysts on the quality of biomass products obtained through microwave pyrolysis. The results showed that different catalysts had varying effects on the yield and selectivity of the products. The study successfully demonstrated a method for producing high-value bio-oil and bio-syngas.
Article
Chemistry, Analytical
Xinyu Yang, Jianping Zhang, Jie Zheng, Zechun Liu, Jiangsheng Liu, Shuirong Li, Yueyuan Ye, Wei Xie, Jianqiang Fan, Hongqiao Lan, Dechao Wang, Zhifeng Zheng
Summary: This study reports a catalytic system using red mud (RM) supported transition metals (Cu/RM, Co/RM, Ni/RM and Mo/RM) as catalysts for the production of furans from cellulose pyrolysis. The results show that Co/RM exhibits superior catalytic performance, while Mo/RM has a weaker effect among the four catalysts. The addition of Mo also increases the peak area of furans and aromatics. Cu/RM promotes the formation of ketones, and Ni/RM further converts furans to aromatics. The effect of in-situ and ex-situ catalytic pyrolysis on product formation was investigated, and Co/RM showed superior catalytic activity in both cases.
JOURNAL OF ANALYTICAL AND APPLIED PYROLYSIS
(2023)
Article
Engineering, Environmental
Linyao Ke, Qiuhao Wu, Nan Zhou, Hui Li, Qi Zhang, Xian Cui, Liangliang Fan, Yuhuan Liu, Kirk Cobb, Roger Ruan, Yunpu Wang
Summary: A pulse pressurized catalytic pyrolysis process was developed to convert waste plastic into high-value compounds. The results showed that pressurization improved the pyrolysis activity and catalysis stability.
JOURNAL OF HAZARDOUS MATERIALS
(2024)
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
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)