Article
Engineering, Environmental
Hui Zhang, Keiichi Okuyama, Shinji Higuchi, Genevieve Soon, Grzegorz Lisak, Adrian Wing-Keung Law
Summary: A multiphase CFD-DEM model was developed to simulate a waste-to-energy gasifying and direct melting furnace. The model used characterizations from laboratory experiments to dynamically simulate the density, heat capacity, and fate of waste and charcoal particles under different conditions. The simulation results matched well with site observations, providing insights into the functioning zones and dynamic changes within the furnace. The study demonstrates the utility of the model for optimizing operating conditions and scaled-up design for future waste-to-energy facilities.
Article
Engineering, Chemical
Jan A. Stasiek, Jacek Baranski, Marcin Jewartowski, Jan Wajs
Summary: The research focuses on the development of a new technological process for the thermochemical conversion of biomass and communal waste, aiming for higher thermal efficiency and lower emission of harmful compounds.
Article
Chemistry, Physical
Merve Ozturk, Ibrahim Dincer
Summary: This paper conducts a comprehensive case study on utilizing municipal solid waste for potential hydrogen production. The energy and exergy efficiencies for hydrogen production are found to be 57% and 55% respectively, with good agreement achieved with previous studies. The waste can be converted to hydrogen through a series of processes, including gasifier, cyclone, catalytic reactor, and pressure swing adsorption.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2021)
Article
Thermodynamics
D. A. Buentello-Montoya, C. A. Duarte-Ruiz, J. F. Maldonado-Escalante
Summary: This study simulates the co-gasification of plastics and biomass and finds that increasing the proportion of plastics in the gasification feedstock improves the gas heating value and tar content. PET is the least valuable plastic in the process, and the H2/CO ratio decreases with temperature during the gasification of a mixture of PP/PET/biomass, which is important for the end-use of the syngas.
Article
Thermodynamics
Isabelly P. Silva, Rafael M. A. Lima, Hortencia E. P. Santana, Gabriel F. Silva, Denise S. Ruzene, Daniel P. Silva
Summary: This study aimed to improve the prediction of gasification system behavior by developing and applying empirical correlations for tar, coal, and methane, resulting in models that better described experimental results compared to traditional models.
Article
Energy & Fuels
Zhongfa Hu, Yangfan Peng, Fenjin Sun, Shanshan Chen, Yuegui Zhou
Summary: Underground coal gasification is a promising technology for converting coal resources into high-quality synthesis gas with low cost. The study found that gasification pressure and temperature have significant effects on the composition of synthesis gas, and increasing the oxygen/steam ratio enhances the contents of H-2 and CH4, as well as the low heating value of the synthesis gas.
Review
Chemistry, Physical
Tao Chen, Tianxing Da, Yan Ma
Summary: This article highlights the ambiguity in calculating adsorption equilibrium constants and thermodynamic parameters, emphasizing the importance of using dimensionless standard equilibrium constants and the influence of standard state selection on the values of ΔG(θ), ΔH-θ, and ΔS-θ. Various methods for calculating equilibrium constants for different isotherm models are provided.
JOURNAL OF MOLECULAR LIQUIDS
(2021)
Article
Energy & Fuels
Wei Pan, Dezhen Chen, Song Hu, Dunxi Yu, Lijie Yin, Yuyan Hu
Summary: This study investigated the impact of municipal solid wastes pyrolysis char (MSWC) combustion on its ash melting. The presence of carbon was found to reduce the ash melting temperature by approximately 40 degrees C, but the combustion rate of MSWC was much faster than that of ash melting.
Article
Energy & Fuels
Wei Pan, Dezhen Chen, Song Hu, Dunxi Yu, Lijie Yin, Yuyan Hu
Summary: This research investigates the impact of municipal solid wastes pyrolysis char (MSWC) combustion on ash melting. Experimental results show that the presence of carbon reduces the ash melting temperature by approximately 40 degrees C. The combustion heat promotes ash melting, while the combustion rate of MSWC is faster than ash melting. Increasing the surrounding temperature and O-2 concentration in combustion air promotes both combustion and ash melting. Higher carbon content in MSWC only slightly improves ash melting. Smaller particle size accelerates carbon combustion but does not contribute to higher ash melting ratio.
Article
Engineering, Environmental
Shaoheng Ge, Dezhen Chen, Lijie Yin, Liu Hong, Hongquan Zhou, Zhen Huang
Summary: By reforming the volatile compounds from municipal solid waste (MSW) pyrolysis using high-temperature flue gas and char as the reagents, the energy recovery efficiency of MSW can be improved. This research provides guidance for producing high-quality syngas from MSW.
Article
Engineering, Environmental
Wenqi Zhang, Qingdong Li, Yahui He, Yinfeng Wang, Lei Wang, Yuezhao Zhu
Summary: This study investigates the effects of pyrolysis degree on the melting characteristics of pyrolysis residue and the transformation properties of heavy metals. Results show that moisture and light volatile can disperse the melting residue during gasification-melting treatment, causing differences in morphology and color. Additionally, an increase in pyrolysis temperature transforms the heavy metals from bioavailable to stable state.
JOURNAL OF HAZARDOUS MATERIALS
(2024)
Article
Energy & Fuels
A. C. Cruz, M. E. Ramalho, R. M. Pilao
Summary: In this study, the co-gasification of treated crude glycerol and animal fat was investigated using steam as the gasification agent. The results showed that the use of dolomite as a catalyst promoted the production of a gas rich in H-2 and CO2, and the gasification parameters increased with temperature.
BIOMASS CONVERSION AND BIOREFINERY
(2022)
Article
Engineering, Environmental
Guven Acikalin, Ibrahim Dincer
Summary: In this study, a unique solar-based waste to energy system that produces ammonia, electricity, and heating was developed and analyzed. Thermodynamic modeling and assessment studies were conducted to evaluate the system's performance using energy and exergy analysis methods. The system utilizes a solar tower to produce steam, which is then used as a gasification agent for plastic-based municipal solid waste to produce syngas. To reduce CO2 emissions, a CO2 capture system was integrated into the gasification system. Parametric studies were performed to improve the overall and subsystem energy and exergy efficiencies, and the Rankine and Brayton cycles were used to provide heat and electricity to the community.
PROCESS SAFETY AND ENVIRONMENTAL PROTECTION
(2023)
Article
Energy & Fuels
Jifu Zhang, Peizhe Cui, Sheng Yang, Yaru Zhou, Wei Du, Yinglong Wang, Chengwei Deng, Shuai Wang
Summary: To solve environmental problems related to municipal sludge incineration and landfilling, a CCHP system is proposed, integrating plasma gasification, SOFC, gas turbine, S-CO2 cycle, and ARC. The system captures CO2 to reduce environmental impact. Energy, exergy, and sensitivity analyses were conducted, revealing the key factors affecting system performance. The results show high efficiencies and the system performs best under specific temperature and fuel utilization rate conditions.
Article
Green & Sustainable Science & Technology
Ahmad Reza Salehiyoun, Hamid Zilouei, Mohammad Safari, Francesco Di Maria, Seyed Hashem Samadi, Omid Norouzi
Summary: This study investigates the effect of biochar addition on the dry anaerobic digestion of organic solid waste. The results show that adding biochar can enhance methane production and yield, control acidification, and shorten the lag phase. However, the synergistic effects at higher biochar doses are limited, and organic waste with a higher C/N ratio obtains less benefits.
