Article
Agricultural Engineering
Wen Cao, Yimeng Wei, Hui Jin, Shi Liu, Linhu Li, Wenwen Wei, Liejin Guo
Summary: In this study, an experimental investigation was conducted to evaluate the gasification characteristics of food waste in supercritical water. The results showed that higher reaction temperature and longer residence time promoted the gasification of food waste. The addition of catalysts improved the gasification performance by converting more liquid intermediates into gaseous products.
BIOMASS & BIOENERGY
(2022)
Article
Green & Sustainable Science & Technology
Mi Yan, Jianyong Liu, Kunio Yoshikawa, Jiahao Jiang, Yan Zhang, Gaojun Zhu, Yu Liu, Dwi Hantoko
Summary: This study investigated a cascading energy recovery process by integrating hydrothermal carbonization (HTC) and supercritical water gasification (SCWG) for the efficient disposal and conversion of HTC process water. The results showed that energy densified hydrochar could be obtained through HTC, while SCWG efficiently converted the HTC process water into H-2-rich syngas.
Article
Environmental Sciences
Jianyong Liu, Defeng Wang, Caimeng Yu, Jiahao Jiang, Meihui Guo, Dwi Hantoko, Mi Yan
Summary: This study proposed an innovative two-steps heating process for the SCWG of food waste, utilizing hydrothermal pretreatment to shorten gasification time and improve syngas yield and energy utilization efficiency. The optimal condition achieved an energy saving rate of 15.58%.
SCIENCE OF THE TOTAL ENVIRONMENT
(2021)
Article
Chemistry, Physical
Jie Zhang, Bowen Li, Yanhui Li, Jinling Lu, Kai Wang, Huamin Zhang
Summary: The study found that 316SS has better corrosion resistance than C276 in both subcritical and supercritical water conditions. In subcritical water at 350°C, the corrosion film of 316SS peeled off while numerous pores or cracks appeared on the surface of C276. In supercritical water at 520°C, a compact scale formed on 316SS sample surface while a duplex-layer scale formed on C276, with Ni-sulfide channels accelerating the sulfidation corrosion of the alloy. High-temperature alloys with high Cr content and low Ni/Cr ratio are considered suitable for equipment in supercritical water gasification of sulfur-containing coal.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2021)
Article
Chemistry, Physical
Shribalaji Shenbagaraj, Pankaj Kumar Sharma, Amit Kumar Sharma, Geetanjali Raghav, Karthikeya Bharadwaj Kota, Veeramuthu Ashokkumar
Summary: This study developed FFBPNN models based artificial neural network to predict the compositions and yields of synthesis gas in supercritical water gasification. The models showed good prediction accuracy and performance when trained and tested with experimental datasets.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2021)
Article
Chemistry, Physical
Tao Wang, Xiangyang Liu, Sihan Huang, Afzal Waheed, Maogang He
Summary: The co-gasification of lignin and plastic in supercritical water was studied using reactive molecular dynamics simulations. The influence of temperature on the evolution behavior of the carbon chains was analyzed, showing that lignin cracks slowly at low temperatures and the main gasification products at high temperatures are H2, CH4, CO, and CO2.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2022)
Article
Thermodynamics
Jingwei Chen, Liangyu Fu, Ming Tian, Siyi Kang, Jiaqiang E
Summary: This paper investigates the supercritical water gasification (SCWG) characteristics of waste thermoplastic plastics and a mixed plastic. The effects of reaction temperature, reaction time, and mass concentration on gasification characteristics are explored, and the optimal conditions are obtained. The results show that the reaction temperature has the most significant positive effect on the SCWG of different plastics. The study also highlights the higher efficiency of SCWG for mixed plastic due to the synergistic effect of different plastic composition.
Article
Engineering, Environmental
Wei Yu, Chao Liu, Qibin Li, Liyong Xin, Shukun Wang
Summary: The supercritical water gasification method was used to treat waste HFCs refrigerants, and the main products were found to be HF, H2, CO, and CO2. Higher reaction temperature accelerated the reaction rate, lower reactant concentrations increased the yields of CO2 and H2, and higher pressure had various effects on the yields of different products.
PROCESS SAFETY AND ENVIRONMENTAL PROTECTION
(2022)
Article
Chemistry, Physical
Ali Karimi, Negar Kazemi, Omid Tavakoli, Azadeh Ebrahimian Pirbazari
Summary: This study investigated the supercritical water gasification of black liquor for hydrogen production, finding that the hydrogen yield could be enhanced by optimizing temperature and reaction time. The addition of heterogeneous catalysts and other biomass like wood residue and formic acid further improved the hydrogen production.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2022)
Article
Chemistry, Physical
Dilek Selvi Gokkaya, Gokcen Akgul, Mehmet Saglam, Mithat Yuksel, Levent Ballice
Summary: This study investigated the effects of catalyst concentration and temperature on product distribution in supercritical water gasification, and demonstrated that group 1A carbonates can increase the yields of H2 and CH4. The results support the development of reaction conditions using effective catalysts to address global bioenergy shortage and effective waste management in the industry.
JOURNAL OF SUPERCRITICAL FLUIDS
(2021)
Article
Green & Sustainable Science & Technology
Le Wang, Jia Chen, Jinhua Cui, Gaoyun Wang, Hui Jin, Liejin Guo
Summary: Supercritical water gasification offers an efficient and clean treatment for spent ion exchange resins, with high temperature, low concentration, K2CO3 catalyst addition, and long residence time promoting the gasification result. The carbon gasification efficiency reached 97.2% at 750 degrees C with 10 wt% concentration and K2CO3 catalyst addition. The main organic component residues in the liquid products were identified, and the reaction pathways and distributions of sulfur and nitrogen were discussed.
JOURNAL OF CLEANER PRODUCTION
(2023)
Article
Materials Science, Multidisciplinary
Siqi Rong, Lei Huang, Ruoyu Wang, Jialing Xu, Zhiyong Peng, Yunan Chen, Hui Jin, Liejin Guo
Summary: Supercritical water gasification (SCWG) technology is considered promising for treating oily wastewater, but the impact of mixed inorganic salts on the reactor during the SCWG process is not well studied. This study exposed Fe-based alloys and Ni-based alloys to an environment of inorganic chloride salt in supercritical water. The analysis revealed that in an environment of supercritical water containing inorganic chlorides, Fe-based alloys showed suppressed surface corrosion, while Ni-based alloys exhibited exacerbated surface corrosion.
Article
Energy & Fuels
Sandro Gonzalez-Arias, Abel Zuniga-Moreno, Ricardo Garcia-Morales, Octavio Elizalde-Solis, Francisco J. Veronico-Sanchez, Sergio O. Flores-Valle
Summary: The study evaluated gasification of guava waste under supercritical water conditions, finding that high temperature operation and high biomass:water mass ratio enhanced gas yields, especially for hydrogen gas.
Article
Thermodynamics
Mi Yan, Yu Liu, Yucai Song, Aiming Xu, Gaojun Zhu, Jiahao Jiang, Dwi Hantoko
Summary: In China, a two-stage energy recovery process involving hydrothermal carbonization (HTC) and supercritical water gasification (SCWG) was used to treat household kitchen waste (HKW). The study yielded energy densified hydrochar and H2-rich syngas through the sequential processes, showing the potential for an economically feasible method for disposal and utilization of HKW.
Article
Chemistry, Physical
Zherui Ma, Jiangjiang Wang, Yingsong Feng, Ruikun Wang, Zhenghui Zhao, Hongwei Chen
Summary: This study proposes an optimization framework that considers the prediction uncertainties of SCWG data-driven models to optimize the gasification efficiency of organic solid waste. By constructing prediction models and optimization models, robust optimization results are obtained.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2023)
Article
Energy & Fuels
Ukrit Samaksaman, Worarat Pattaraprakorn, Arthit Neramittagapong, Ekkachai Kanchanatip
Summary: Hydrothermal carbonization can effectively convert macadamia nut shell into solid fuel with higher heating value. The energy recovery can be improved by adjusting the hydrothermal conditions. Higher temperature during hydrothermal treatment can enhance the coalification and thermal stability of the hydrochar.
BIOMASS CONVERSION AND BIOREFINERY
(2023)
Article
Energy & Fuels
Mi Yan, Qun Huan, Yan Zhang, Wei Fang, Feng Chen, Agamuthu Pariatamby, Ekkachai Kanchanatip, Haryo Wibowo
Summary: In this study, ChCl-MEA DES was used as an absorbent for CO2 capture. The effects of absorption pressure, temperature, and water content in DES on CO2 absorption performance were evaluated. The results showed that ChCl-MEA DES exhibited high CO2 absorption capacity and selectivity, indicating its great potential for CO2 capture from biogas.
BIOMASS CONVERSION AND BIOREFINERY
(2022)
Article
Energy & Fuels
Mi Yan, Yan Zhang, Nurak Grisdanurak, Haryo Wibowo, Caimeng Yu, Ekkachai Kanchanatip
Summary: One advantage of supercritical water gasification combined with CO2 capture and storage technology is the conversion of bio-waste into hydrogen-rich syngas. This study synthesized copper benzene-1,3,5-tricarboxylate metal organic frameworks and used them as adsorbents for CO2 capture from SCWG model syngas. The adsorption capacity of the adsorbents was affected by synthesis time, adsorption temperature, and adsorption pressure, with adsorption pressure having the most significant effect. Cu-BTC with a synthesis time of 48 hours showed the highest CO2 capacity. Therefore, Cu-BTC has the potential to remove CO2 from SCWG syngas.
BIOMASS CONVERSION AND BIOREFINERY
(2022)
Article
Engineering, Environmental
Ruixiong Hu, Yu Liu, Gaojun Zhu, Cheng Chen, Dwi Hantoko, Mi Yan
Summary: The combination of coagulation and activated carbon adsorption can effectively reduce the COD in HTC wastewater and enhance its biodegradability, making it suitable for further biochemical treatment.
JOURNAL OF WATER PROCESS ENGINEERING
(2022)
Article
Thermodynamics
Mi Yan, Yu Liu, Yucai Song, Aiming Xu, Gaojun Zhu, Jiahao Jiang, Dwi Hantoko
Summary: In China, a two-stage energy recovery process involving hydrothermal carbonization (HTC) and supercritical water gasification (SCWG) was used to treat household kitchen waste (HKW). The study yielded energy densified hydrochar and H2-rich syngas through the sequential processes, showing the potential for an economically feasible method for disposal and utilization of HKW.
Article
Green & Sustainable Science & Technology
Mi Yan, Jianyong Liu, Kunio Yoshikawa, Jiahao Jiang, Yan Zhang, Gaojun Zhu, Yu Liu, Dwi Hantoko
Summary: This study investigated a cascading energy recovery process by integrating hydrothermal carbonization (HTC) and supercritical water gasification (SCWG) for the efficient disposal and conversion of HTC process water. The results showed that energy densified hydrochar could be obtained through HTC, while SCWG efficiently converted the HTC process water into H-2-rich syngas.
Article
Energy & Fuels
Mi Yan, Jintao Cui, Tian Li, Hongyu Feng, Dwi Hantoko, Ekkachai Kanchanatip
Summary: This study conducted a comprehensive investigation on the transformation and distribution of nitrogen and phosphorus during supercritical water gasification of sewage sludge. The results showed that organic nitrogen was converted to ammonium nitrogen, while phosphates were enriched in the solid phase. Therefore, this study provides a theoretical basis for the utilization of the liquid product and the recovery of phosphorus from the solid product.
Article
Engineering, Environmental
Mi Yan, Xiaoqiang Wen, Yansong Sun, Zhihao Zhou, Jiahao Jiang, Ruixiong Hu, Yan Zhang, Dwi Hantoko
Summary: Desalination coupled with heavy metal solidification was investigated for the treatment of fly ash from hazardous waste incineration. Sintering not only reduces the bulk density of fly ash but also can reduce heavy metal leaching toxicity. The treated ash can meet the leaching limit of heavy metals for the flexible landfill in China, significantly saving landfill space.
PROCESS SAFETY AND ENVIRONMENTAL PROTECTION
(2023)
Article
Engineering, Environmental
Mi Yan, Yayong Yang, Tianchi Shen, Nurak Grisdanurak, Agamuthu Pariatamby, Mohammad Khalid, Dwi Hantoko, Haryo Wibowo
Summary: In this study, supercritical ethanol depolymerization (SCED) was used to recover monomer from waste PET. The effects of reaction temperature, reaction time, and liquid/solid mass ratio on depolymerization efficiency were investigated. The optimal conditions for depolymerization were found to be 310℃, 60 min, and a liquid/solid ratio of 10:1. SCED showed potential for monomer recovery from waste PET.
PROCESS SAFETY AND ENVIRONMENTAL PROTECTION
(2023)
Article
Energy & Fuels
Piyanut Phuthongkhao, Kitanchalee Phasin, Purita Boonma, Rattabal Khunphonoi, Ekkachai Kanchanatip, Totsaporn Suwannaruang, Harikaranahalli Puttaiah Shivaraju, Kitirote Wantala
Summary: The successful conversion of paper sludge waste to carbonaceous hydrochar was demonstrated through hydrothermal carbonization under controlled conditions. The hydrochar produced at higher temperatures and for a longer time showed excellent fuel characteristics with steadily increased carbon content and high heating value. This research has potential sustainable and broader applications in the fields of energy, agriculture, and waste treatment.
BIOMASS CONVERSION AND BIOREFINERY
(2023)
Article
Engineering, Environmental
Ekkachai Kanchanatip, Pradabduang Kiattisaksiri, Arthit Neramittagapong
Summary: This study investigated the treatment of liquid effluent from hydrothermal carbonization of macadamia nut shell using Cu, Ni, and Fe doped titanium dioxide photocatalysts. The results showed that Fe doped TiO2 exhibited the highest photocatalytic activity, followed by Cu and Ni. Fe doped anatase TiO2 achieved the highest removal rates of TOC and COD, with concentrations reduced to 405.62 mg/L and 91.26 mg/L, respectively. These findings suggest that photocatalytic degradation could be a potential treatment for HTC liquid effluent before it is released into the environment.
JOURNAL OF ENVIRONMENTAL SCIENCE AND HEALTH PART A-TOXIC/HAZARDOUS SUBSTANCES & ENVIRONMENTAL ENGINEERING
(2023)
Article
Engineering, Environmental
Tianchi Shen, Yayong Yang, Ekkachai Kanchanatip, Dwi Hantoko, Feng Chen, Cheng Chen, Mi Yan
Summary: Hydrothermal carbonization (HTC) is an efficient method to convert wet food waste into hydrochar. However, the by-product of this process, HTC wastewater, contains highly polluting chemicals. In this study, hydrochar was produced through HTC process and further processed into activated carbon (AC) using KOH activation. The obtained AC was used to catalyze the degradation of HTC wastewater. The optimal condition for the catalytic process was determined, achieving a COD removal efficiency of 78.94%.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2023)
Article
Multidisciplinary Sciences
Aisyah Ardy, Dwi Hantoko, Jenny Rizkiana, Melia Laniwati Gunawan, Mi Yan, Herri Susanto
Summary: This study aimed to investigate the effect of phosphorus addition on the γ-Al2O3 catalyst for methanol dehydration to DME synthesis. The results showed that the 5%P/gamma-Al2O3 catalyst exhibited good performances with medium acidity for the dehydration of methanol to DME.
ARABIAN JOURNAL FOR SCIENCE AND ENGINEERING
(2023)
Article
Energy & Fuels
Ekkachai Kanchanatip, Wasipim Chansiriwat, Sawangthip Palalerd, Rattabal Khunphonoi, Tinnakorn Kumsaen, Kitirote Wantala
Summary: This study investigates the production of light biofuels using modified Thai dolomite as a catalyst. The results show that the Mg content and reaction temperature have an impact on the yield and quality of the biofuels produced.
CARBON RESOURCES CONVERSION
(2022)