Review
Energy & Fuels
Guicai Liu, Grzegorz Lisak
Summary: This review summarizes the basic properties and opportunities of Cu-based OCs in various chemical looping processes. It covers the applications of Cu-based OCs in chemical looping combustion (CLC), chemical looping oxygen uncoupling (CLOU), chemical looping air separation (CLAS), chemical looping for syngas/H2 production, integrated CaO/CuO looping process, and thermochemical energy storage (TCES). The review also discusses the technical challenges and current strategies related to agglomeration, attrition, and ash accumulation. It provides insights and guidance for the design and development of Cu-based OCs and their applications in chemical looping processes.
Article
Engineering, Environmental
Hongming Jiang, Shuchang Yan, Jingzhi Yan, Chengyang Li, Yan Lin, Zengli Zhao, Zhen Huang, Hongyu Huang, Haibin Li
Summary: Red mud, an alkaline waste residue from the aluminum industry, can be used as a raw material for preparing oxygen carriers. This study discussed the desulfurization performance and mechanism of different types of red mud oxygen carriers under various reaction conditions. The results showed that the desulfurization capacity of red mud oxygen carriers mainly relied on Na/Ca elements, while Fe2O3 had no desulfurization capacity at temperatures above 750 degrees C. Water-washed red mud oxygen carriers exhibited good desulfurization performance, with WS900 achieving a desulfurization efficiency of 86.28% at 900 degrees C. The red mud oxygen carriers prepared at 800-900 degrees C demonstrated good desulfurization activity, while those prepared at 1000 degrees C or above showed a significant decline in performance. The key components responsible for desulfurization activity in red mud oxygen carriers included Na2Ti3O7, Ca2SiO4, and CaTiO3, while NaAlSiO4, Na6Al4Si4O17, and Ca2Al2SiO7 had minimal sulfur fixation capacity. The redox performance of the red mud oxygen carriers under multi-cycle conditions was minimally affected by the H2S atmosphere, and the water-washed red mud oxygen carriers rich in Na and Ca exhibited the best redox performance.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Green & Sustainable Science & Technology
Haiming Wang, Guicai Liu, Andrei Veksha, Xiaomin Dou, Apostolos Giannis, Teik Thye Lim, Grzegorz Lisak
Summary: The redox performances of iron ore modified with different alkaline earth metals as oxygen carriers for chemical looping combustion of municipal solid waste derived syngas were evaluated. It was found that BaO-modified iron ore demonstrated the best reactivity, and AEM oxides showed superior performance compared to AEM aluminates due to their strong interaction with Fe2O3.
JOURNAL OF CLEANER PRODUCTION
(2021)
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)
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)
Article
Chemistry, Applied
Viktor Andersson, Amir H. Soleimanisalim, Xiangrui Kong, Henrik Leion, Tobias Mattisson, Jan B. C. Pettersson
Summary: The study investigates the interactions between alkali and an oxygen carrier in Chemical-Looping Combustion (CLC) to better understand the fate of alkali in the process. Results show that alkali uptake is limited under oxidizing conditions but significant during stable reducing conditions.
FUEL PROCESSING TECHNOLOGY
(2022)
Review
Energy & Fuels
Zhenwu Miao, Enchen Jiang, Zhifeng Hu
Summary: This review discusses the influence of three key factors on agglomeration of chemical looping technology, extends existing agglomeration mechanisms, and reviews detection and prevention technologies. High reaction temperature, poor anti-sintering ability of oxygen carriers, and systems with alkali metals and silicon-based materials can easily cause agglomeration. Previous literature has summarized agglomeration mechanisms induced by alkali metals in biomass ash, speculating that they react with the support material to inactivate the active components.
Article
Chemistry, Applied
Jinchen Ma, Xue Zhang, Peng Peng, Xin Tian, Mengshuang Li, Ying Li, Zuwei Xu, Haibo Zhao
Summary: In this study, LaFeO3 perovskite with an ordered porous structure was synthesized via the sol-gel method and used as an oxygen carrier for chemical looping dry reforming (CLDR) of ethane. The performance and characteristics of the oxygen carrier and the CLDR process were comprehensively investigated. Results showed that LaFeO3 efficiently converted ethane into syngas (H2 and CO), and the deposited carbon on the oxygen carrier could be effectively removed by CO2. The highest C2H6 conversion, CO yield, and CO selectivity were achieved at 800 degrees C and 12,000 L/(kg center dot h).
FUEL PROCESSING TECHNOLOGY
(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
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
Energy & Fuels
Ming Yang, Da Song, Yang Li, Jinzeng Cao, Guoqiang Wei, Fang He
Summary: This study investigated the chemical looping gasification (CLG) of bituminite using NiFe2O4 oxygen carrier. The changes in the phase of the oxygen carrier during the reaction and the reaction mechanism were explored. The results showed that elevated temperature and adding steam facilitated the gasification reaction, and adding ZrO2 and alkali metal enhanced the performance of the oxygen carrier. The optimized reaction conditions yielded a carbon conversion rate of 95% and a syngas selectivity of 86%. After 20 redox cycles, the carbon conversion rate remained at around 90% and the syngas selectivity was stably maintained above 80%.
Article
Chemistry, Physical
Xinhe Wang, Stephane Abanades, Srirat Chuayboon, Junshe Zhang, Jinjia Wei
Summary: This study explores the use of a strontium ferrite-calcium manganese oxide nanocomposite as an oxygen carrier for chemical looping reforming of methane in a solar tubular reactor. The nanocomposite exhibits stable performance and higher solar-to-fuel efficiency compared to powder nanocomposites. High temperatures and methane flowrates are required to increase productivity and efficiency.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2022)
Article
Chemistry, Applied
Viktor Andersson, Xiangrui Kong, Henrik Leion, Tobias Mattisson, Jan B. C. Pettersson
Summary: This study evaluates a novel laboratory-scale fluidized bed reactor for chemical looping combustion (CLC) studies. The reactor design takes into consideration the complex interactions between alkali compounds and reactor walls and is guided by computational fluid dynamic simulations. The experimental results demonstrate that the reactor has significantly improved functionality compared to a previously used reactor, allowing for detailed investigations of interactions between alkali compounds and oxygen carriers used in CLC.
FUEL PROCESSING TECHNOLOGY
(2023)
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
Energy & Fuels
Siqi Liu, Fang He, Kun Zhao, Haibo Zhao, Zhen Huang, Guoqiang Wei, Wen Yang
Summary: Coal chemical looping gasification (CCLG) is a promising technology with high resource utilization rate and environmental protection properties, requiring suitable oxygen carriers and optimized operating conditions for coal conversion and H2&CO production. This study tested a Cu-Fe bi-ore oxygen carrier and found that the optimal gasification conditions were at 950 degrees C with a oxygen carrier-to-coal mass ratio of 3:1 and steam rate of 0.08 ml/min, achieving a syngas yield of 58 mmol/g, 75.2% syngas selectivity, and 85.3% carbon conversion.
Article
Energy & Fuels
Ajay Menon, James Lyng, Apostolos Giannis
Summary: Deficiency of trace metals exacerbates instability in the methanogenic phase of thermophilic anaerobic digestion (AD), but addition of a micronutrient supplement can increase methane production and enhance microbial diversity and functional diversity.
BIOMASS CONVERSION AND BIOREFINERY
(2023)
Article
Engineering, Environmental
Arvin Liangdy, Wen Jie Lee, Panyawut Tonanon, Richard David Webster, Shane Allen Snyder, Teik-Thye Lim
Summary: A catalytic ceramic membrane (CCM) impregnated with Co-Mn-oxide via citrate sol-gel method was used to activate peroxymonosulfate (PMS) and degrade sulfamethoxazole (SMX). The Co-Mn bimetallic oxides exhibited higher catalytic activity compared to their single oxides due to the synergistic effect between the two cations. Optimal performance of the CCM/PMS process was achieved by controlling catalyst loading, oxidant dosage, and pollutant concentration.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Thermodynamics
Guicai Liu, Ya Zhao, Stephan Heberlein, Andrei Veksha, Apostolos Giannis, Wei Ping Chan, Teik Thye Lim, Grzegorz Lisak
Summary: This study compared the co-production of H-2 and power from biomass sorption enhanced gasification and sorption enhanced chemical looping gasification under autothermal conditions. The results showed that sorption enhanced chemical looping gasification achieved higher energy efficiency than sorption enhanced gasification.
ENERGY CONVERSION AND MANAGEMENT
(2022)
Article
Engineering, Environmental
Lek Hong Lim, Preston Tan, Wei Ping Chan, Andrei Veksha, Teik-Thye Lim, Grzegorz Lisak, Wen Liu
Summary: Waste-to-Energy through MSW incineration is an effective waste management strategy, but it releases CO2 and produces ash. This study explores the use of ash-derived sorbents for CO2 capture. The analysis shows that the addition of certain fuels increases the cost of electricity, but also reduces CO2 emissions. Optimizing energy-intensive processes and policy support are important for further improvement and adoption of negative emission technologies.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Engineering, Environmental
Guicai Liu, Grzegorz Lisak
Summary: This study proposes a new concept of converting plastic waste into high-value products and utilizing CO2 through fast pyrolysis integrated with volatile chemical looping CO2 splitting. Three conversion modes were evaluated, and it was found that the cracking mode with Ni/Al2O3 or Ni/MgAl2O4 catalyst exhibited better performance in fuel conversion and syngas separation. The cracking mode's efficiency increased with higher temperature, but the interaction between Ni and the support limited the full separation of syngas.
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
Engineering, Environmental
Chat How Joewin Koh Yang, Guicai Liu, Wei Ping Chan, Ya Zhao, Mei Ping Vernette Chin, Wen Liu, Teik Thye Lim, Grzegorz Lisak
Summary: The utilization of ferric sludge as an oxygen carrier (OC) for chemical looping combustion (CLC) of municipal solid waste (MSW) syngas was explored. The performance of ferric sludge in CLC and simultaneous HCl removal was evaluated and compared with iron ore as a benchmarked OC. The results showed that ferric sludge performed better than iron ore in terms of syngas combustion efficiency and HCl removal. Temperature comparison revealed that ferric sludge performed better at lower CLC temperature. Agglomeration was observed when ferric sludge was used in extended CLC cycles, but it was reduced when inert alpha-Al2O3 support was used.
CHEMICAL ENGINEERING JOURNAL
(2023)
Review
Engineering, Environmental
Arvin Liangdy, Wen Jie Lee, Yueping Bao, Wen-Da Oh, Teik-Thye Lim
Summary: The hybrid catalytic oxidation and membrane filtration process is becoming a popular research topic for removing micropollutants in water. This review focuses on the use of metal oxide-functionalized catalytic ceramic membranes (CCMs) in sulfate radical-based hybrid processes. The fabrication methods of MeOx-CCMs and various characterization techniques are discussed. The importance of intrinsic catalytic and membrane properties in the hybrid process is emphasized, as well as the challenges in real water remediation.
CHEMICAL ENGINEERING JOURNAL
(2023)
Review
Energy & Fuels
Guicai Liu, Grzegorz Lisak
Summary: This review summarizes the basic properties and opportunities of Cu-based OCs in various chemical looping processes. It covers the applications of Cu-based OCs in chemical looping combustion (CLC), chemical looping oxygen uncoupling (CLOU), chemical looping air separation (CLAS), chemical looping for syngas/H2 production, integrated CaO/CuO looping process, and thermochemical energy storage (TCES). The review also discusses the technical challenges and current strategies related to agglomeration, attrition, and ash accumulation. It provides insights and guidance for the design and development of Cu-based OCs and their applications in chemical looping processes.
Article
Green & Sustainable Science & Technology
Eleni Kastanaki, Apostolos Giannis
Summary: With the rapid promotion of electric vehicles in the EU, a new e-waste category, lithium-ion batteries, is emerging. Proper management of these batteries, including remanufacturing, reuse, and recycling, is necessary for circular economy models. Analyzing material and substance flow, it is projected that there will be 113-301 thousand (6-31 GWh) batteries available for remanufacturing by 2024-2034, and 212-617 GWh capacity of Second Life (2 L) batteries by 2040. The recycled metals from these batteries can meet 5.2-11.3% of the demand for new materials according to the recycling efficiencies of the 2020 EU Battery Directive.
JOURNAL OF CLEANER PRODUCTION
(2023)
Article
Materials Science, Multidisciplinary
Boon Chong Ong, Zhong Chen, Teik-Thye Lim, ZhiLi Dong
Summary: In this study, an effective hole scavenger layer of polyoxometalates (POMs) with excellent redox properties and high durability is coated on titanium dioxide (TiO2) nanorods to enhance the photoelectrochemical (PEC) water oxidation activity. The Co-POMs layers on TiO2 can effectively retard the recombination of photoinduced electron-hole pairs by extracting and transporting the generated holes, resulting in improved overall PEC performance under neutral conditions. This work provides a facile and promising method for promoting PEC water oxidation by depositing Co-POMs layers on TiO2 nanorods.
MATERIALS CHEMISTRY AND PHYSICS
(2023)
Article
Engineering, Environmental
Panagiotis Chazirakis, Apostolos Giannis, Evangelos Gidarakos
Summary: This article uses life cycle assessment to investigate the environmental impacts of two alternative approaches in a biowaste management system. The study is based on actual data and on-site sampling at a facility in Greece. The results show that biowaste source segregation in an integrated waste management system not only significantly benefits its recoverability potential but also improves its environmental performance.
Article
Environmental Sciences
Wanyi Huang, Yixing Yuan, Dan Zhong, Peng Zhang, Arvin Liangdy, Teik-Thye Lim, Wencheng Ma, Yuan Yuan
Summary: We compared the elimination of 5-bromosalicylic acid (BSA) in goethite (alpha-FeOOH)/H2O2 and lepidocrocite (gamma-FeOOH)/H2O2 systems. BSA could be adsorbed on alpha- and gamma-FeOOH and effectively degraded after the addition of H2O2. The systems showed differences in adsorption kinetics and degradation mechanisms, with gamma-FeOOH having greater adsorption ability and alpha-FeOOH performing better in catalyzing the decomposition of H2O2.
Article
Engineering, Environmental
Amadu T. Bah, Ziyi Shen, Junna Yan, Feihu Li, Teik Thye Lim
Summary: By combining batch adsorption enrichment with struvite crystallization, we prepared ternary layered double hydroxides (LDHs) with P-preferring elements and evaluated their performance in recovering P from water. The LDHs demonstrated high P adsorption capacities and the recycling tests showed good enrichment for P. Moreover, more than 96% of phosphorus in the P-enriched eluates can be efficiently reclaimed via struvite crystallization. These findings demonstrate the feasibility of combining adsorption enrichment with struvite crystallization for P recovery.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2023)
Article
Green & Sustainable Science & Technology
Lars odegaard Bentsen, Narada Dilp Warakagoda, Roy Stenbro, Paal Engelstad
Summary: This study investigates uncertainty modeling in wind power forecasting using different parametric and non-parametric methods. Johnson's SU distribution is found to outperform Gaussian distributions in predicting wind power. This research contributes to the literature by introducing Johnson's SU distribution as a candidate for probabilistic wind forecasting.
JOURNAL OF CLEANER PRODUCTION
(2024)
Article
Green & Sustainable Science & Technology
Xing Liu, Qiuchen Wang, Yunhao Wen, Long Li, Xinfang Zhang, Yi Wang
Summary: This study analyzes the characteristics of process parameters in three lean gas ethane recovery processes and establishes a prediction and multiobjective optimization model for ethane recovery and system energy consumption. A new method for comparing ethane recovery processes for lean gas is proposed, and the addition of extra coolers improves the ethane recovery. The support vector regression model based on grey wolf optimization demonstrates the highest prediction accuracy, and the multiobjective multiverse optimization algorithm shows the best optimization performance and diversity in the solutions.
JOURNAL OF CLEANER PRODUCTION
(2024)
Article
Green & Sustainable Science & Technology
Cairong Song, Haidong Yang, Xian-Bing Meng, Pan Yang, Jianyang Cai, Hao Bao, Kangkang Xu
Summary: The paper proposes a novel deep learning-based prediction framework, aTCN-LSTM, for accurate cooling load predictions. The framework utilizes a gate-controlled multi-head temporal convolutional network and a sparse probabilistic self-attention mechanism with a bidirectional long short-term memory network to capture both temporal and long-term dependencies in the cooling load sequences. Experimental results demonstrate the effectiveness and superiority of the proposed method, which can serve as an effective guide for HVAC chiller scheduling and demand management initiatives.
JOURNAL OF CLEANER PRODUCTION
(2024)
Article
Green & Sustainable Science & Technology
Zhe Chen, Xiaojing Li, Xianli Xia, Jizhou Zhang
Summary: This study uses survey data from the Loess Plateau in China to evaluate the impact of social interaction on the adoption of soil and water conservation (SWC) technology by farmers. The study finds that social interaction increases the likelihood of farmers adopting SWC, and internet use moderates this effect. The positive impact of social interaction on SWC adoption is more pronounced for farmers in larger villages and those who join cooperative societies.
JOURNAL OF CLEANER PRODUCTION
(2024)
Article
Green & Sustainable Science & Technology
Chenghua Zhang, Yunfei Yan, Kaiming Shen, Zongguo Xue, Jingxiang You, Yonghong Wu, Ziqiang He
Summary: This paper reports a novel method that significantly improves combustion performance, including heat transfer enhancement under steady-state conditions and adaptive stable flame regulation under velocity sudden increase.
JOURNAL OF CLEANER PRODUCTION
(2024)
