Review
Chemistry, Physical
Ben Wang, Rajender Gupta, Lei Bei, Qianmin Wan, Lushi Sun
Summary: This review provides an overview of research progress related to syngas quality, tar formation, and minerals transformation. It also describes the current technology under construction and commercial applications, as well as the challenges and prospects for commercial operation. The study highlights the importance of temperature, gasification agents, and steam to MSW ratio in syngas production, and discusses the different forms of tar in various atmospheres. The review also emphasizes the need for efficient catalysts, proper management of heavy metals, and the reduction of investment and operational costs.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2023)
Article
Environmental Sciences
Imtiaz Ali Jamro, Abdul Raheem, Salim Khoso, Humair Ahmed Baloch, Akash Kumar, Guanyi Chen, Waheed Ali Bhagat, Terrence Wenga, Wenchao Ma
Summary: An artificial neural network (ANN) was used to assess the gasification of municipal solid waste (MSW) and enhance H2 production. The experiments were conducted under different parameters and the input and output variables were tested and trained using the back-propagation algorithm. The results of the training and validation datasets were satisfactory.
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2023)
Article
Green & Sustainable Science & Technology
Muhammad Sajid, Abdul Raheem, Naeem Ullah, Muhammad Asim, Muhammad Saif Ur Rehman, Nisar Ali
Summary: Sustainable waste management is a crucial issue in modern societies, and scientific research aims to develop effective waste management strategies to address health and environmental concerns. Thermal treatments, particularly gasification, offer viable solutions for municipal waste management. This review critically examines different gasification technologies, feed alternatives, catalysts, and technology adoption. Mixed feedstock management, such as combining municipal solid waste with agricultural waste, can be a practical solution, although economic considerations and waste disposal regulations play important roles in design strategy and implementation.
RENEWABLE & SUSTAINABLE ENERGY REVIEWS
(2022)
Review
Agricultural Engineering
Duu-Jong Lee
Summary: This mini-review provides an overview of current research and development efforts in producing hydrogen-rich syngas from municipal solid waste (MSW) by pyrolysis/gasification. The focus is on syngas upgrades and novel gasification processes, with the goal of making MSW gasification a sustainable and affordable route for waste disposal. A graphical assessment protocol is proposed to aid in understanding the main reactions involved in MSW gasification, and future prospects are considered for reference in further studies.
BIORESOURCE TECHNOLOGY
(2022)
Article
Engineering, Environmental
Muhammad Irfan, Aimin Li, Lei Zhang, Guozhao Ji, Yuan Gao, Shujauddin Khushk
Summary: Gasification of wet municipal solid waste with in-situ CO2 capture using Ni-CaO based catalysts prepared with waste marble powder showed enhanced performance, with Co promoted bimetallic catalysts exhibiting the best results in terms of hydrogen yield and tar removal. Transition metal promoted catalysts showed higher catalytic activity compared to Ni-WMP catalyst, with Co promoted catalysts outperforming Fe, Cu, and Zn promoted catalysts.
Article
Chemistry, Physical
Pradip Mondal
Summary: Management of solid waste has always been a challenging task for governing authorities. This study focuses on using gasification to produce hydrogen (H-2) from municipal solid waste (MSW) as a green fuel alternative. A fixed bed gasifier model is developed and optimized to achieve the best output parameters including H-2 yield, lower heating value (LHV) of syngas, and cold gas efficiency (CGE).
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2022)
Article
Thermodynamics
Peng Chu, Qiang Hu, Jialing Chen, Alexander Lin, Xian Li, Dexiang Chen, Ken Leong, Yanjun Dai, Chi-Hwa Wang, Ching Yi-Anne Loh
Summary: Energy consumption and waste management are significant challenges. This study explores the conversion of municipal solid waste to energy/resource, achieving high energy efficiency and moisture removal. Additionally, the utilization of waste char in construction materials is beneficial.
ENERGY CONVERSION AND MANAGEMENT
(2022)
Article
Engineering, Chemical
Yuchen Liu, Chengfeng Liao, Yuting Tang, Jiehong Tang, Yong Sun, Xiaoqian Ma
Summary: Through comparing the MGPG and MIPG technologies in two cities of China, it was found that MGPG is more environmentally friendly, while MIPG has a stronger stability in resisting policy risks. Despite the higher equipment investment, MGPG has higher profit in the same city. Therefore, MGPG technology could be regarded as a promising alternative power generation process in underdeveloped areas like Leizhou.
JOURNAL OF THE TAIWAN INSTITUTE OF CHEMICAL ENGINEERS
(2022)
Article
Engineering, Chemical
Juma Haydary, Patrik Suhaj, Michal Soral
Summary: Gasification technology can convert solid waste into valuable gas, but single-stage batch gasification systems face challenges related to tar and wax content. The use of a secondary catalytic stage can significantly reduce tar content in the gas, mitigating the impact of tar on downstream processes.
Review
Environmental Sciences
Atanu Kumar Das, Md. Nazrul Islam, Md. Morsaline Billah, Asim Sarker
Summary: Municipal solid waste is an inevitable by-product of human activity and the COVID-19 outbreak has posed challenges to waste management. Various countries are striving to address issues in waste management during the pandemic through safety measures and disinfectants.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2021)
Article
Engineering, Environmental
Guangchao Ding, Boshu He, Huifeng Yao, Yucheng Kuang, Jingge Song, Liangbin Su
Summary: In this study, the co-gasification characteristics and synergistic interaction of municipal solid waste (MSW) and bituminous coal (BC) in CO2 atmosphere were investigated using thermogravimetric analysis. Results showed that addition of MSW can enhance the gasification reactivity of BC, leading to improved overall gasification efficiency. A significant synergistic effect was observed in the char gasification stage for all blends, with the optimal blend ratio of BC found to be 40% for the co-gasification process.
Article
Energy & Fuels
Ouissal Bourguig, Ana Ramos, Khalid Bouziane, Mohamed Asbik, Eliseu Monteiro, Abel Rouboa
Summary: This article discusses the current situation of municipal solid waste generation and management in Morocco, and presents a model for hydrogen production from municipal solid waste and biomass using co-gasification technology. The research findings indicate that increasing gasification temperature and steam to feedstock ratio can enhance hydrogen production.
Article
Energy & Fuels
Xiangzhi Kong, Angjian Wu, Siming Fu, Ruiyang Xu, Yucheng Zhao, Xiaodong Li, Jianhua Yan
Summary: A rotating gliding arc plasma reactor is proposed to effectively remove tar from municipal solid waste and biomass, achieving over 90% destruction efficiency for major components. The study compared the composition of tar from MSW and biomass, highlighting the influence of vapor concentration, CO2 concentration, and discharge current on destruction efficiency. Species with oxygen-containing functional groups are more susceptible to destruction compared to aromatic hydrocarbon species, with similar trends in destruction efficiency observed for both MSW and biomass tar.
Article
Chemistry, Physical
Shahram Khalilarya, Ata Chitsaz, Parisa Mojaver
Summary: The study utilized municipal solid waste from Urmia University student dormitories to establish a co-generation system, whose performance was validated and optimal power was obtained through power generation optimization.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2021)
Article
Energy & Fuels
Muhammad Irfan, Aimin Li, Lei Zhang, Guozhao Ji, Yuan Gao
Summary: In this study, HfO2 was used as a stabilizer and promoter for the NiCaO catalyst system, improving the stability and hydrogen production performance. The addition of HfO2 significantly increased syngas yield and reduced tar content, indicating the potential of HfO2 promoted catalysts for efficient syngas production.
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
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
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)
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
Agriculture, Multidisciplinary
Lili Liang, Andrei Veksha, Grzegorz Lisak
Summary: In this study, the utilization of carbon nanomaterials derived from plastics as nanopriming agents was investigated. The results showed that these nanomaterials significantly improved seed germination, seedling growth, and salt tolerance in pea plants, suggesting their potential application in waste management and agricultural renovation.
ACS AGRICULTURAL SCIENCE & TECHNOLOGY
(2023)
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
Energy & Fuels
Yingna Du, Chen Huang, Wei Jiang, Qiangwei Yan, Yongfei Li, Gang Chen
Summary: In this study, anionic surfactants modified hydrotalcite was used as a flow improver for crude oil under low-temperature conditions. The modified hydrotalcite showed a significant viscosity reduction effect on crude oil. The mechanism of the modified hydrotalcite on viscosity and pour point of crude oil was explored through characterization and analysis of the modified hydrotalcite and oil samples.
Article
Energy & Fuels
Mohammad Saeid Rostami, Mohammad Mehdi Khodaei
Summary: In this study, a hybrid structure, MIL-53(Al)@MWCNT, was synthesized by combining MIL-53(Al) particles and -COOH functionalized multi-walled carbon nanotube (MWCNT). The hybrid structure was then embedded in a polyethersulfone (PES) polymer matrix to prepare a mixed matrix membrane (MMM) for CO2/CH4 and CO2/N2 separation. The addition of MWCNTs prevented MIL-53(Al) aggregation, improved membrane mechanical properties, and enhanced gas separation efficiency.
Article
Energy & Fuels
Yunlong Li, Desheng Huang, Xiaomeng Dong, Daoyong Yang
Summary: This study develops theoretical and experimental techniques to determine the phase behavior and physical properties of DME/flue gas/water/heavy oil systems. Eight constant composition expansion (CCE) tests are conducted to obtain new experimental data. A thermodynamic model is used to accurately predict saturation pressure and swelling factors, as well as the phase boundaries of N2/heavy oil systems and DME/CO2/heavy oil systems, with high accuracy.
Article
Energy & Fuels
Morteza Afkhamipour, Ebad Seifi, Arash Esmaeili, Mohammad Shamsi, Tohid N. Borhani
Summary: Non-conventional amines are being researched worldwide to overcome the limitations of traditional amines like MEA and MDEA. Adequate process and thermodynamic models are crucial for understanding the applicability and performance of these amines in CO2 absorption, but studies on process modeling for these amines are limited. This study used rate-based modeling and Deshmukh-Mather method to model CO2 absorption by DETA solution in a packed column, validated the model with experimental data, and conducted a sensitivity analysis of mass transfer correlations. The study also compared the CO2 absorption efficiency of DETA solution with an ionic solvent [bmim]-[PF6] and highlighted the importance of finding optimum operational parameters for maximum absorption efficiency.
Article
Energy & Fuels
Arastoo Abdi, Mohamad Awarke, M. Reza Malayeri, Masoud Riazi
Summary: The utilization of smart water in EOR operations has gained attention, but more research is needed to understand the complex mechanisms involved. This study investigated the interfacial tension between smart water and crude oil, considering factors such as salt, pH, asphaltene type, and aged smart water. The results revealed that the hydration of ions in smart water plays a key role in its efficacy, with acidic and basic asphaltene acting as intrinsic surfactants. The pH also influenced the interfacial tension, and the aged smart water's interaction with crude oil depended on asphaltene type, salt, and salinity.
Article
Energy & Fuels
Dongao Zhu, Kun Zhu, Lixian Xu, Haiyan Huang, Jing He, Wenshuai Zhu, Huaming Li, Wei Jiang
Summary: In this study, cobalt-based metal-organic frameworks (Co-based MOFs) were used as supports and co-catalysts to confine the NHPI catalyst, solving the leaching issue. The NHPI@Co-MOF with carboxyl groups exhibited stronger acidity and facilitated the generation of active oxygen radicals O2•, resulting in enhanced catalytic activity. This research provides valuable insights into the selection of suitable organic linkers and broadens the research horizon of MOF hybrids in efficient oxidative desulfurization (ODS) applications.
Article
Energy & Fuels
Edwin G. Hoyos, Gloria Amo-Duodu, U. Gulsum Kiral, Laura Vargas-Estrada, Raquel Lebrero, Rail Munoz
Summary: This study investigated the impact of carbon-coated zero-valent nanoparticle concentration on photosynthetic biogas upgrading. The addition of nanoparticles significantly increased microalgae productivity and enhanced nitrogen and phosphorus assimilation. The presence of nanoparticles also improved the quality of biomethane produced.
Article
Energy & Fuels
Yao Xiao, Asma Leghari, Linfeng Liu, Fangchao Yu, Ming Gao, Lu Ding, Yu Yang, Xueli Chen, Xiaoyu Yan, Fuchen Wang
Summary: Iron is added as a flocculant in wastewater treatment and the hydrothermal carbonization (HTC) of sludge produces wastewater containing Fe. This study investigates the effect of aqueous phase (AP) recycling on hydrochar properties, iron evolution and environmental assessment during HTC of sludge. The results show that AP recycling process improves the dewatering performance of hydrochar and facilitates the recovery of Fe from the liquid phase.
Article
Energy & Fuels
He Liang, Tao Wang, Zhenmin Luo, Jianliang Yu, Weizhai Yi, Fangming Cheng, Jingyu Zhao, Xingqing Yan, Jun Deng, Jihao Shi
Summary: This study investigated the influence of inhibitors (carbon dioxide, nitrogen, and heptafluoropropane) on the lower flammability limit of hydrogen and determined the critical inhibitory concentration needed for complete suppression. The impact of inhibitors on explosive characteristics was evaluated, and the inhibitory mechanism was analyzed with chemical kinetics. The results showed that with the increase of inhibitor quantity, the lower flammability limit of hydrogen also increased. The research findings can contribute to the safe utilization of hydrogen energy.
Article
Energy & Fuels
Zonghui Liu, Zhongze Zhang, Yali Zhou, Ziling Wang, Mingyang Du, Zhe Wen, Bing Yan, Qingxiang Ma, Na Liu, Bing Xue
Summary: In this study, high-performance solid catalysts based on phosphotungstic acid (HPW) supported on Zr-SBA-15 were synthesized and evaluated for the one-pot conversion of furfural (FUR) to γ-valerolactone (GVL). The catalysts were characterized using various techniques, and the ratio of HPW and Zr was found to significantly affect the selectivity of GVL. The HPW/Zr-SBA-15 (2-4-15) catalyst exhibited the highest GVL yield (83%) under optimized reaction conditions, and it was determined that a balance between Bronsted acid sites (BAS) and Lewis acid sites (LAS) was crucial for achieving higher catalytic performance. The reaction parameters and catalyst stability were also investigated.
Article
Energy & Fuels
Michael Stoehr, Stephan Ruoff, Bastian Rauch, Wolfgang Meier, Patrick Le Clercq
Summary: As part of the global energy transition, an experimental study was conducted to understand the effects of different fuel properties on droplet vaporization for various conventional and alternative fuels. The study utilized a flow channel to measure the evolution of droplet diameters over time and distance. The results revealed the temperature-dependent effects of physical properties, such as boiling point, liquid density, and enthalpy of vaporization, and showed the complex interactions of preferential vaporization and temperature-dependent influences of physical properties for multi-component fuels.
Article
Energy & Fuels
Yuan Zhuang, Ruikang Wu, Xinyan Wang, Rui Zhai, Changyong Gao
Summary: Through experimental validation and optimization of the chemical kinetic model, it was found that methanol can accelerate the oxidation reaction of ammonia, and methanol can be rapidly oxidized at high concentration. HO2 was found to generate a significant amount of OH radicals, facilitating the oxidation of methanol and ammonia. Rating: 7.5/10.
Article
Energy & Fuels
Radwan M. EL-Zohairy, Ahmed S. Attia, A. S. Huzayyin, Ahmed I. EL-Seesy
Summary: This paper presents a lab-scale experimental study on the impact of diethyl ether (DEE) as an additive to waste cooking oil biodiesel with Jet A-1 on combustion and emission features of a swirl-stabilized premixed flame. The addition of DEE to biodiesel significantly affects the flame temperature distribution and emissions. The W20D20 blend of DEE, biodiesel, and Jet A-1 shows similar flame temperature distribution to Jet A-1 and significantly reduces UHC, CO, and NOx emissions compared to Jet A-1.
Article
Energy & Fuels
Jiang Bian, Ziyuan Zhao, Yang Liu, Ran Cheng, Xuerui Zang, Xuewen Cao
Summary: This study presents a novel method for ammonia separation using supersonic flow and develops a mathematical model to investigate the condensation phenomenon. The results demonstrate that the L-P nucleation model accurately characterizes the nucleation process of ammonia at low temperatures. Numerical simulations also show that increasing pressure and concentration can enhance ammonia condensation efficiency.
Article
Energy & Fuels
Shiyuan Pan, Xiaodan Shi, Beibei Dong, Jan Skvaril, Haoran Zhang, Yongtu Liang, Hailong Li
Summary: Integrating CO2 capture with biomass-fired combined heat and power (bio-CHP) plants is a promising method for achieving negative emissions. This study develops a reliable data-driven model based on the Transformer architecture to predict the flowrate and CO2 concentration of flue gas in real time. The model validation shows high prediction accuracy, and the potential impact of meteorological parameters on model accuracy is assessed. The results demonstrate that the Transformer model outperforms other models and using near-infrared spectral data as input features improves the prediction accuracy.