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.
Review
Chemistry, Multidisciplinary
Nhut Minh Nguyen, Falah Alobaid, Paul Dieringer, Bernd Epple
Summary: Biomass gasification is a promising renewable energy source that can replace fossil fuels, but faces challenges such as tar formation and low efficiency. Chemical looping gasification is considered a suitable pathway for producing valuable products from biomass. The review paper provides insights into the recent developments of biomass-based chemical looping gasification process.
APPLIED SCIENCES-BASEL
(2021)
Article
Green & Sustainable Science & Technology
Nhut M. Nguyen, Falah Alobaid, Bernd Epple
Summary: Iron-based oxygen carriers are a promising option for chemical looping gasification to produce syngas. Increasing operating parameters can enhance process performance, and there are differences in performance between iron ore and ilmenite under different conditions.
Article
Agricultural Engineering
Weijie Li, Changxin Li, Yanfen Liao, Shuang Liang, Xiaoqian Ma
Summary: NiO-LaFeO3 synergistic oxygen carriers were synthesized in one-step by sol-gel method and showed high reactivity and stability in biomass chemical looping gasification. The Ni-Fe synergistic effect contributed to the lattice oxygen mobility and powerful oxidation capacity, leading to consistent gas yield, carbon conversion, syngas selectivity and H2/CO ratio.
BIORESOURCE TECHNOLOGY
(2023)
Article
Engineering, Environmental
Ivan Sampron, Arturo Cabello, Francisco Garcia-Labiano, Maria T. Izquierdo, Luis F. de Diego
Summary: Biomass chemical looping gasification (BCLG) is a promising technique for producing renewable syngas with negative carbon emissions. In this study, a Cu-based oxygen carrier, Cu14Al_ICB, was tested for 45 hours using pine sawdust as fuel. Factors such as the oxygen-to-fuel ratio and gasification temperature were found to affect the syngas composition and gasification parameters. The Cu14Al_ICB oxygen carrier demonstrated excellent performance in terms of syngas yield, char gasification, tar removal, and mechanical properties throughout the experiment.
CHEMICAL ENGINEERING JOURNAL
(2023)
Review
Chemistry, Physical
Ming Tian, Chaojie Wang, Yujia Han, Xiaodong Wang
Summary: This review discusses recent advances in oxygen carriers for chemical looping reforming of CH4. The focus is on metal-based OCs, composite OCs, and catalytic OCs, with specific discussions on the influence of OC structure on reaction and design strategies for tailored OCs. Challenges and suggestions for future research on outstanding OCs for CLR of CH4 are also provided.
Article
Engineering, Environmental
Shuang Liang, Yanfen Liao, Weijie Li, Changxin Li, Xiaoqian Ma
Summary: This study investigates the application of core-shell structure oxygen carriers in biomass tar gasification and demonstrates their high-efficiency and clean characteristics. Under suitable conditions, the oxygen carriers significantly increase gas yield and carbon conversion efficiency. Moreover, they maintain stable performance even after cyclic experiments, indicating their potential as promising materials for chemical looping gasification.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Chemistry, Applied
Oscar Condori, Francisco Garcia-Labiano, Luis F. de Diego, Maria T. Izquierdo, Alberto Abad, Juan Adanez
Summary: Biomass Chemical Looping Gasification using LD slag as an oxygen carrier can produce high quality syngas from various types of biomass under autothermal conditions, without agglomeration issues.
FUEL PROCESSING TECHNOLOGY
(2021)
Article
Agricultural Engineering
Guang Li, Shuqi Ma, Fan Liu, Xing Zhou, Kai Wang, Yulong Zhang
Summary: The research focuses on the life cycle water footprint of producing syngas through chemical looping gasification of corn straw and wheat straw, showing that crop growth stage and different allocation methods significantly impact total water consumption. Sensitivity analysis suggests that water consumption of crop yield and growth can have opposite effects on water consumption efficiency.
BIORESOURCE TECHNOLOGY
(2021)
Article
Engineering, Chemical
Zhongshun Sun, Bo Zhang, Rongjiang Zhang, XiangYang Mao, Jianxuan Shang, Bolun Yang, Zhiqiang Wu
Summary: This paper proposes a chemical looping reforming (CLR) of volatiles from biomass pyrolysis based on a decoupling strategy to convert macromolecular volatiles into hydrogen-rich syngas. A highly active and selective oxygen carrier (OC) SBA-15 encapsulating LaFexM1-xO3 (M = Ni, Cu, Co) for the biomass CLR process was developed. Experimental results showed that the encapsulation effect improved the dispersion and reaction performance of the metal oxide.
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
(2023)
Article
Energy & Fuels
Jiawei Wu, Zhifeng Hu, Zhenwu Miao, Wencheng Wu, Enchen Jiang
Summary: The effect of adding calcium to rice husk in chemical looping gasification (CLG) was studied, revealing that calcium can significantly improve the performance of the gasification process, but may cause aggregation and sintering at high concentrations. (CH3COO)2Ca was found to be more beneficial than CaCl2 in enhancing gasification efficiency, with 6% (CH3COO)2Ca leading to optimal gasification efficiency and gas yield in the CLG process.
Article
Engineering, Environmental
Jiawei Wu, Juan Lv, Yousheng Lin, Wencheng Wu, Hongchang Xin, Jinkai Zhao, Yongzhi Ren, Mingfeng Wang, Enchen Jiang, Zhifeng Hu
Summary: This paper investigates the comprehensive influence of Mg on the performance of biomass chemical looping gasification (CLG). The results show that Mg can promote the CLG reaction and improve the gasification efficiency and gas yield. Furthermore, Mg addition can reduce the activation energy in the CLG process.
CHEMICAL ENGINEERING JOURNAL
(2022)
Article
Engineering, Environmental
Oscar Condori, Francisco Garcia-Labiano, Luis F. de Diego, Maria T. Izquierdo, Alberto Abad, Juan Adanez
Summary: Biomass Chemical Looping Gasification (BCLG) is a promising technology for producing high quality syngas using lattice oxygen instead of gaseous oxygen, with a new method for controlling oxygen consumption leading to significant improvements in syngas efficiency. The oxygen-to-biomass ratio was found to be the main factor affecting syngas production efficiency in this study.
CHEMICAL ENGINEERING JOURNAL
(2021)
Article
Agricultural Engineering
Jingchun Yan, Junjie Lai, Kehan Yin, Yongbo Yan, Laihong Shen, Li Yang
Summary: Doped La-Fe-O perovskites were developed for microalgae chemical looping gasification (CLG), showing outstanding performance in syngas production. The perovskites facilitated the formation of NH3 and HCN, while iron ore converted precursors to NO. Below 400 degrees C, NOx can be stored on the perovskite surface, while above 700 degrees C, NOx can be selectively reduced by reducing components in tar or syngas under the catalysis of L3B7F, resulting in reduced NOx emissions. CLG over L3B7F may be a promising way to efficiently utilize microalgae and overcome nitrogen-related obstacles in biomass gasification technologies.
BIORESOURCE TECHNOLOGY
(2023)
Article
Biotechnology & Applied Microbiology
Zhen Fan, Neng Huang, Kunlei Liu
Summary: Chemical looping combustion (CLC) is a fuel combustion technology that has less energy penalty for CO2 removal. This study systematically analyzes the feasibility of autothermal operation in CLC and discusses the selection of oxygen carrier, capacity and impact of support materials, circulation rate, heat-up feeds, aeration gas, reaction kinetics, and CLC operation, aiming to provide insights and approaches for the development of oxygen carriers.
CURRENT OPINION IN CHEMICAL ENGINEERING
(2023)
Article
Chemistry, Physical
Tingting Xu, Xun Wang, Haibo Zhao, Bo Xiao, Dong Liu, Wen Liu
Summary: Doping of heteroatoms in brownmillerite-structured Ca2Fe2O5 can induce structural changes and enhance lattice oxygen activity and oxygen transfer capacity, leading to improved chemical looping steam reforming of biomass tar for higher syngas productivity and hydrogen purity.
APPLIED CATALYSIS B-ENVIRONMENTAL
(2023)
Article
Biotechnology & Applied Microbiology
Hua Zhou, Lei Yu, Shujuan Liu, Anfan Zhu, Yanfang Yang, Caihui Chen, Aihong Yang, Lipan Liu, Faxin Yu
Summary: The study showed that UV-B irradiation can increase the vitamin C content in lettuce, but the processes underlying its biosynthesis and metabolism are unclear. Transcriptome sequencing revealed that the effect of UV-B on vitamin C is dose-dependent and associated with the MIOX gene in the myo-inositol pathway and the APX gene in the recycling pathway. High-dose UV-B may regulate photomorphogenesis and response to stress through hormone regulatory pathways. These findings enhance our understanding of the response of lettuce to UV-B stress and the metabolism-related genes of vitamin C.
Article
Engineering, Environmental
Xiangbowen Du, Mingwu Tan, Tong Wei, Hisayoshi Kobayashi, Junjie Song, Zhengxin Peng, Hongliang Zhu, Zhikang Jin, Renhong Li, Wen Liu
Summary: In this study, a bifunctional catalyst based on NiFe2O4 spinel was used to couple the hydrogen evolution reaction (HER) with selective methanol oxidation reaction (SMOR) for formate production. The results showed that the system exhibited high current density and Faradaic efficiencies, as well as excellent stability during continuous operation. Mechanistic investigation revealed the CO-free pathway for the SMOR reaction.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Engineering, Environmental
Satya Brat Tiwari, Thomas J. N. Hooper, Andrei Veksha, Wei Ping Chan, Xunchang Fei, Wen Liu, Grzegorz Lisak, Teik-Thye Lim
Summary: This study investigated the leaching of phosphorus from sewage sludge (SS) using alkaline treatment, with the addition of alum sludge (AS) and acidic pretreatment. The results showed that the addition of AS improved the recovery efficiency of phosphorus during alkaline leaching, and acidic pretreatment prevented the loss of inorganic phosphorus. This method can be applied globally to improve phosphorus leaching efficiency from SS and achieve dual waste management.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Environmental Sciences
Lei Yu, Cheng-jia Ju, Kai-yan Jing, Zi-yang Wang, Shareen Niyazi, Quan Wang
Summary: To enhance the denitrification efficiency, exogenous redox mediators (RMs) are commonly used to improve electron transfer. Previous studies have focused on improving extracellular electron transfer (EET) through the use of RMs, but the intracellular electron transfer (IET) of biological denitrification has been rarely reported. This study identified the core components in the IET chain of denitrification and investigated the role of a specific redox mediator in enhancing IET. The results provide a better understanding of the electron transfer pathways of denitrification and suggest a potential practical application for exogenous RMs in nitrate-containing wastewater treatment.
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2023)
Article
Food Science & Technology
Jingyu Zhu, Zhenyi Luo, Tingting Sun, Wenxuan Li, Wei Zhou, Xiaonan Wang, Xunchang Fei, Huanhuan Tong, Ke Yin
Summary: In 2017, global greenhouse gas emissions from food loss and waste in supply chain and waste management systems amounted to 9.3 Gt CO2 equivalent, accounting for half of the annual global GHG emissions from the whole food system. The sources of FLW emissions vary by country, region, and food category, and strategies for reducing FLW emissions include reducing generation, decreasing meat consumption, and improving management technologies.
Article
Agricultural Engineering
Wei-xin Cheng, Ling-ling Wang, Yun Xu, Si-jia Li, Quan Wang, Rong-ping Chen, Lei Yu
Summary: A comparison was made between pre-culture bacteria (PCB) and heat treatment anaerobic granular sludge (HTAGS) for hydrogen production, and it was found that the hydrogen molar yield (HMY) of PCB was 21-35% higher than that of HTAGS. The addition of biochar increased hydrogen production in both cultivation methods by enhancing extracellular electron transfers. Fe3O4 did not promote hydrogen production in PCB experiments but had a positive effect on HTAGS experiments due to the different microbial composition of the two systems. Different pretreatment methods of inoculum resulted in significant changes in the sludge community, thus affecting biohydrogen production.
BIORESOURCE TECHNOLOGY
(2023)
Article
Green & Sustainable Science & Technology
Yuru Liu, Jingyu Zhu, Christopher Padi Tuwor, Chen Ling, Lei Yu, Ke Yin
Summary: We evaluate the response of global supply chains to carbon emissions during the COVID-19 crisis by using MRIO models for import and export shocks in 14 countries/territories. CO2 emissions inventories based on intermediate inputs and final consumption are used to analyze the environmental impacts. The results show a decrease of 6.01% in global carbon emissions during COVID-19, with a significant reduction in imported carbon emissions and the transport sector witnessing an 18.42% carbon emission reduction.
JOURNAL OF CLEANER PRODUCTION
(2023)
Article
Green & Sustainable Science & Technology
Syed Saqline, Lizhong Yang, Alessandro Romagnoli, Wen Liu
Summary: The Allam cycle is a promising oxy-fuel combustion power cycle that uses supercritical CO2 as the thermal fluid to achieve power generation with CO2 capture. This paper presents a thermodynamic analysis of a new variation of the Allam cycle, called the Allam-CLAS process, which integrates a chemical looping air separation system to supply oxygen to the combustor. The results show that the Allam-CLAS process can achieve higher net electrical efficiency and exergetic efficiency compared to conventional Allam cycles coupled with cryogenic air separation units (ASU).
JOURNAL OF CLEANER PRODUCTION
(2023)
Article
Environmental Sciences
Cheng-jia Ju, Shareen Niyazi, Wen-yin Cao, Quan Wang, Rong-ping Chen, Lei Yu
Summary: This study investigated the performance and electron transfer mechanisms of anaerobic and aerobic denitrification by strain Klebsiella. The results showed that the membrane bound nitrate reductase gene (narG) and Cu-nitrite reductase gene (nirK) were responsible for both anaerobic and aerobic denitrification. The nitrite reductase (Nir) activity was lower under anaerobic conditions compared to aerobic conditions, and Fe-S protein and Complex III were the core components under anaerobic conditions, while Coenzyme Q (CoQ), Complexes I and III played a key role in aerobic denitrification. Nitrogen assimilation was found to be the main way to generate NH4+-N during anaerobic denitrification.
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2023)
Article
Environmental Sciences
Rong-ping Chen, Xin-yuan Wei, Cheng-hao Gan, Bing-cai Cai, Wen-jie Xu, Shareen Niyazi, Quan Wang, Lei Yu, Hui-hua Min, Qiang Yong
Summary: This study prepared two novel and eco-friendly redox mediators (MOV and MOS) derived from lignin to improve the decolorization of methyl orange dye. The Decolorization Efficiency (DE) of MO in batch experiments with MOV and MOS increased by more than 60% and 22%, respectively, compared to the control experiment. These two magnetic RMs also maintained stable DE in sequenced batch reactors with negligible leaching of oxidized lignin monomers. DFT calculations proposed three potential biodegradation mechanisms for azo dyes, and key intermediates were confirmed using HPLC analysis. This study provided a feasible strategy for functional utilization of lignin resource and an effective method for treating azo dye-containing wastewater.
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2023)
Article
Chemistry, Physical
Xianyue Wu, Ribooga Chang, Mingwu Tan, Longgang Tao, Qianwenhao Fan, Xiaochun Hu, Hui Ling Tan, Michelle Ahlen, Ocean Cheung, Wen Liu
Summary: CO2 capture and utilisation (CCU) is an effective strategy to mitigate the adverse greenhouse effects caused by CO2 emissions. Integrated CO2 capture and utilisation (ICCU) allows CO2 capture and catalytic conversion to happen in a single process using dual function materials. This study investigates the relationship between the Ni/carbonate interfaces and the performance of Ni-based dual function materials in ICCU cycles.
APPLIED CATALYSIS B-ENVIRONMENTAL
(2023)
Article
Environmental Sciences
Ling-ling Wang, Zheng-yan Yin, Yun Xu, Miao-yu Deng, Kai-ming Zhang, Quan Wang, Rong-ping Chen, Lei Yu
Summary: The production and composition of extracellular polymeric substances (EPS) and the related functional resistance genes and metabolic levels of Bacillus sp. under Cu(II) stress were investigated. The study found that EPS production increased by 2.73 times and the polysaccharide (PS) content and PN/PS ratio in EPS increased under Cu(II) stress, enhancing the cells' ability to resist Cu(II) toxicity. Gene ontogeny pathway analysis and Kyoto Encyclopedia of Genes and Genomes pathway analysis revealed differential expression of functional genes involved in EPS regulation and copper resistance, indicating the strain's defense mechanism against Cu(II) stress. These findings provide a basis for the application of EPS-regulated bacteria in heavy metal wastewater treatment.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2023)
Article
Chemistry, Physical
Teseer Bahry, Shang Jiang, Umesh Jonnalagadda, Wen Liu, Benoit Teychene, Francois Jerome, Samir H. Mushrif, Prince N. Amaniampong
Summary: This study presents a novel catalytic chemistry for the demethylenation of benzyl alcohol to phenol using a combination of an earth-abundant transition metal oxide (CuO) catalyst and high frequency ultrasound (HFUS). The reaction takes place in water and at room temperature. By characterizing the catalyst, analyzing the chemistry and acoustics, using isotope labelling and density functional theory computations, the researchers unveil the molecular reaction mechanism, which involves benzaldehyde as an intermediate. Water is not only a benign solvation medium, but also directly participates in the reaction by undergoing dissociation due to sonolysis. The adsorption of the OH from water on the catalyst surface inhibits recombination and activates the C-H bond in benzyl alcohol, leading to the formation of benzaldehyde and its incorporation into the phenyl ring to form phenol.
CATALYSIS SCIENCE & TECHNOLOGY
(2023)
Review
Engineering, Environmental
Yuru Liu, Ke Yin, Jiawei Wu, Daofeng Mei, Jukka Konttinen, Tero Joronen, Zhifeng Hub, Chao He
Summary: This review systematically analyzes the impact of ash compositions on the oxygen carrier in the chemical looping process (CLP), providing insights into the agglomeration and melting process caused by ash deposition. Strategies are proposed to mitigate the adverse effects of ash and recycle useful metals.
CHEMICAL ENGINEERING JOURNAL
(2023)
