FuelPub Date : 2024-12-01DOI: 10.1016/j.fuel.2024.133911
Zhuoying Jin , Shijie Mi , Dezhi Zhou , Yong Qian , Xingcai Lu
{"title":"The characteristics analysis and feasible improvement strategy evaluation for ammonia-diesel dual-fuel engine under heavy load and high ammonia ratio conditions","authors":"Zhuoying Jin , Shijie Mi , Dezhi Zhou , Yong Qian , Xingcai Lu","doi":"10.1016/j.fuel.2024.133911","DOIUrl":"10.1016/j.fuel.2024.133911","url":null,"abstract":"<div><div>The decarbonization and reduction of dependence on fossil fuel for transportation industry relies on the rapid and large-scale adoption of carbon free fuels. This paper conducts systematical simulations for the ammonia-diesel dual-fuel engine with ammonia port injection and diesel direct injection with a validated numerical framework based on OpenFOAM and the Lib-ICE codes, focusing on the heavy load and high ammonia ratio conditions with significant carbon reduction potential. Facing the challenges of enlarged unburned NH<sub>3</sub> emissions and low thermal efficiency under heavy load and high ammonia ratio conditions, the aim of this study is to explore the characteristics and feasible improvement strategies under this special and crucial operation condition. Wherein, the engine load and displacement of this study is 16 bar Indicated Mean Effective Pressure (IMEP) approximate 90 % of the maximum load and 1.327 L, respectively. Firstly, the reference cases with 70 %, 80 % and 90 % ammonia energy ratios (AER) are investigated. The energy balance and emissions analysis indicate that a significant portion of ammonia energy remains unutilized, leading to suboptimal greenhouse gas reduction effectiveness and low thermal efficiency. Given the limited diesel mass, optimizing diesel distribution for ignition and subsequent ammonia energy activation becomes crucial. Detailed analysis of unburned ammonia region indicates the potential of improvement through diesel injection strategy for AER70 and AER80 conditions, while the hydrogen introduction strategy is then proposed for AER90 condition. The comparison of advanced SOI and diesel split injection strategy under AER70 condition shows the superiority of split injection since comparing with the original case, it achieves 85.38 %, 99.88 % unburned NH<sub>3</sub> reduction, 41.48 %, 81.70 % greenhouse gas reduction, 15.61 %, 13.45 % ITE increase with SOI1 = −60°CA ATDC, SOI2 = −10, −15°CA ATDC conditions, respectively. Under AER80 condition, due to proper diesel distribution and reactivity stratification, the case with SOI = −30°CA ATDC obtains best improvement effectiveness, resulting in notable 16.41 % ITE increase, 95.81 % NH<sub>3</sub> and 69.55 % N<sub>2</sub>O reduction. Under AER90 condition, hydrogen is introduced and homogenously premixed with ammonia through port injection. Hydrogen mainly makes a difference to later ammonia combustion, as evidenced by the increases in OH radical peak and second peak of heat release with the rise of HER. However, continuous hydrogen introduction fails to achieve significant improvement effectiveness. In conclusion, through proper combustion control strategies, the high ammonia ratio (70 %, 80 %) is promising for practical application with greenhouse gas reduction advantage and proper thermal efficiency under heavy load condition.</div></div>","PeriodicalId":325,"journal":{"name":"Fuel","volume":"383 ","pages":"Article 133911"},"PeriodicalIF":6.7,"publicationDate":"2024-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142757335","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Laminar burning velocity and explosion characteristics of a lignocellulose-derived bio-jet fuel at elevated pressures and temperatures","authors":"Qiyang Wang, Zhongyang Luo, Cangsu Xu, Chunjiang Yu","doi":"10.1016/j.fuel.2024.133834","DOIUrl":"10.1016/j.fuel.2024.133834","url":null,"abstract":"<div><div>The production of aviation fuel from lignocellulose is inexpensive and has high selectivity and atom economy. The authors reproduced a mixed fuel of a bio-jet fuel candidate, which was obtained from lignocellulose using the hydropyrolysis vapor upgrading process. The combustion characteristics of this fuel have not been studied yet, so the laminar burning velocity and explosion characteristics of the fuel were investigated under a wide range of conditions in a constant volume combustion chamber at initial pressures of 1, 2, and 4 bar, initial temperatures of 400, 435, and 470 K, and equivalence ratios of 0.7–1.4. The results show that the laminar burning velocity of the fuel is maximum at the equivalence ratio of 1.1–1.2, which is close to that of RP-3 and Jet A-1 but smaller than that of bio-jet fuels produced through hydroprocessed esters and fatty acids. The simulation shows good agreement with experiment at elevated temperatures. The explosion intensity increases with an increase in the equivalence ratio under elevated initial pressures due to pressure oscillation. The dominant frequency of the pressure oscillation is slightly higher than that of the brightness oscillation, both of which are between 2500 and 3000 Hz The reduction of Markstein length is correlated with pressure oscillations and brightness oscillations.</div></div>","PeriodicalId":325,"journal":{"name":"Fuel","volume":"383 ","pages":"Article 133834"},"PeriodicalIF":6.7,"publicationDate":"2024-11-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142744707","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
FuelPub Date : 2024-11-30DOI: 10.1016/j.fuel.2024.133858
Taishun Yang , Hao He , Shiyu Yan , Jiaojiao Gao , Zixu Yang , Jing Xu
{"title":"Catalytic depolymerization of poly(ethylene terephthalate) plastic into value-added monomers using metal-modified mesoporous silica","authors":"Taishun Yang , Hao He , Shiyu Yan , Jiaojiao Gao , Zixu Yang , Jing Xu","doi":"10.1016/j.fuel.2024.133858","DOIUrl":"10.1016/j.fuel.2024.133858","url":null,"abstract":"<div><div>The glycolysis of poly(ethylene terephthalate) (PET), a polymer extensively used in food packaging, into bis(2-hydroxyethyl) terephthalate (BHET) monomers was investigated using mesoporous silica supported by metal oxide as catalysts. Among these, a catalyst composed of ZnO supported on KIT-6 (5%ZnO/KIT-6) showed an effective performance in PET glycolysis, achieving a BHET yield of 92.1% with complete conversion of PET. Additionally, the catalyst demonstrated exceptional reusability and high efficiency in handling post-consumer PET plastics, with BHET yields reaching up to 89%. Characterization studies revealed that the highly dispersed ZnO nanoparticles trapped in KIT-6 channels formed strong interactions with surface Si-OH groups, leading to an enhanced acid strength and an increased number of acid sites, which significantly improved PET depolymerization. This study presents an innovative solution for the recycling of PET plastic, contributing to industrial development and reducing the impact of plastic waste.</div></div>","PeriodicalId":325,"journal":{"name":"Fuel","volume":"383 ","pages":"Article 133858"},"PeriodicalIF":6.7,"publicationDate":"2024-11-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142744820","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
FuelPub Date : 2024-11-30DOI: 10.1016/j.fuel.2024.133902
Mohammed AlDhuhoori, Hadi Belhaj, Fatima AlHameli, Faisal Aljaberi
{"title":"Hydrogen underground storage potential in sandstone formation: A thorough study utilizing surface complexation modelling","authors":"Mohammed AlDhuhoori, Hadi Belhaj, Fatima AlHameli, Faisal Aljaberi","doi":"10.1016/j.fuel.2024.133902","DOIUrl":"10.1016/j.fuel.2024.133902","url":null,"abstract":"<div><div>This research focuses on the geochemical aspects of hydrogen underground storage, with particular emphasis on surface complexation modelling and its impact on surface potential and surface charge. The primary objective is to develop the first comprehensive surface complexation model specifically tailored for sandstone rocks, emphasizing key minerals such as quartz, kaolinite, and calcite, which are suitable for hydrogen underground storage applications. This model is intended to serve as a benchmark for more research in this field, providing a solid foundation for investigating and improving predictions related to wettability alteration. Additionally, the model has been integrated with hydrogen solubility to accurately capture changes in surface charge. The study identified six brine compositions with various minerals to examine the effect of monovalent and divalent ions. The results showed an increase in solubility with an overall reduction in salinity, and a decrease in divalent ions. The homogeneous surface complexation model demonstrated a neutral surface potential, attributed to an increased mole fraction of positively charged >SiOH<sup>+</sup>and a decreased in negatively charged >SiO-. Similar trends were observed in kaolinite and calcite minerals. The influence of pH was also explored, revealing a significant impact on the homogeneous quartz case, where an increase in pH shifted the surface potential from neutral to more negative. The heterogeneous cases exhibited less negative behavior as the quartz content increased per case, mainly due the increasing presence of positively charged species such as >SiOH<sup>+</sup> and >AlOH<sup>+</sup>, and the reduction of the negatively charged >AlO<sup>-</sup>. Increasing the salinity of the solution resulted in less negative surface potential, attributed to the abundance of positive divalent and monovalent ions boosted by increasing salinity, thus the formation of positive surface complexes.</div></div>","PeriodicalId":325,"journal":{"name":"Fuel","volume":"383 ","pages":"Article 133902"},"PeriodicalIF":6.7,"publicationDate":"2024-11-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142744819","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
FuelPub Date : 2024-11-29DOI: 10.1016/j.fuel.2024.133865
Jiayi Liu , Yulian Wang , Wanzhong Yin , Haoran Sun , Yu Xie , Xueming Yin , Jin Yao
{"title":"Salicylic acid-induced single-step synthesis of multimorphic anhydrous MgCO3 from brucite waste: Characterization, mechanism, and DFT calculation","authors":"Jiayi Liu , Yulian Wang , Wanzhong Yin , Haoran Sun , Yu Xie , Xueming Yin , Jin Yao","doi":"10.1016/j.fuel.2024.133865","DOIUrl":"10.1016/j.fuel.2024.133865","url":null,"abstract":"<div><div>The brucite production generates a large amount of powdered solid waste, which presents significant challenges for direct utilization. Utilizing brucite for CO<sub>2</sub> mineralization enables solid waste reuse and CO<sub>2</sub> utilization and storage. In this study, multimorphic anhydrous MgCO<sub>3</sub> was synthesized from brucite solid waste and salicylic acid using a one-step method. The results indicate that higher temperatures and longer hydrothermal times favor the anhydrous MgCO<sub>3</sub> formation. Cubic, hexagonal block and columnar anhydrous MgCO<sub>3</sub> were synthesized by regulating the salicylic acid additions. The formation mechanism reveals that coordination between salicylic acid and Mg<sup>2+</sup> inhibits Mg<sup>2+</sup> hydration, preventing the hydrated MgCO<sub>3</sub> formation. Phenol and phenolate anion derived from salicylic acid decomposition adsorb onto the anhydrous MgCO<sub>3</sub> surfaces, regulating crystal growth. Characterization results and DFT calculations show that the salicylate, phenolate anion, and phenol form ionic coordination bonds and hydrogen bonds with Mg<sup>2+</sup>/anhydrous MgCO<sub>3</sub>, achieving chelation and adsorption, which modulate the phase transition and morphology of crystal. Anhydrous MgCO<sub>3</sub> shows potential applications in flame retardancy, electronic component enhancement, photoelectrochemical energy storage, and wastewater treatment. This method represents a comprehensive green technology for CO<sub>2</sub> reduction and anhydrous MgCO<sub>3</sub> synthesis, shortening the preparation process for high-value-added magnesium products, and offering broad industrial prospects.</div></div>","PeriodicalId":325,"journal":{"name":"Fuel","volume":"383 ","pages":"Article 133865"},"PeriodicalIF":6.7,"publicationDate":"2024-11-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142744702","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
FuelPub Date : 2024-11-29DOI: 10.1016/j.fuel.2024.133893
Lei Wu , Yining Guan , B. Rajasekhar Reddy , Changcong Li , Rock Keey Liew , Jun Zhou
{"title":"Revelation of non-thermal effects on microwave drying of lignite: Reactor design and drying characteristics","authors":"Lei Wu , Yining Guan , B. Rajasekhar Reddy , Changcong Li , Rock Keey Liew , Jun Zhou","doi":"10.1016/j.fuel.2024.133893","DOIUrl":"10.1016/j.fuel.2024.133893","url":null,"abstract":"<div><div>Microwave non-thermal effects are controversial and its effects on lignite microwave drying remain blank. The lignite drying characteristics in shielded microwave drying (SMD) and unshielded microwave drying (USMD) using a self-designed SiC composite shielded sleeve were compared. The results showed that the positive influences of the non-thermal effects in lignite microwave drying were obtained. The non-thermal effects could significantly increase the microwave drying rate of lignite, enhance its ability to remove moisture, improve the average diffusion coefficient, and effectively reduce the drying activation energy. The lignite in USMD achieved a maximum drying rate of 0.86 g/g min after just 2 min of drying at 700 W. The average diffusion coefficient of lignite reached a maximum of 3.57 × 10<sup>-6</sup> m<sup>2</sup>/s, and the activation energy reached a minimum of 113.15 W/g. This paper provides some new evidences for the existence of non-thermal effects, and firstly reveals its influences effects on lignite microwave drying.</div></div>","PeriodicalId":325,"journal":{"name":"Fuel","volume":"383 ","pages":"Article 133893"},"PeriodicalIF":6.7,"publicationDate":"2024-11-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142744706","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
FuelPub Date : 2024-11-29DOI: 10.1016/j.fuel.2024.133888
Changqing Fu , Xin Kou , Yi Du , Liangliang Jiang , Shuxun Sang , Zhejun Pan
{"title":"Experimental study of supercritical CO2-H2O-coal interactions and the effect on coal spontaneous imbibition characteristics","authors":"Changqing Fu , Xin Kou , Yi Du , Liangliang Jiang , Shuxun Sang , Zhejun Pan","doi":"10.1016/j.fuel.2024.133888","DOIUrl":"10.1016/j.fuel.2024.133888","url":null,"abstract":"<div><div>The interaction among supercritical CO<sub>2</sub> (ScCO<sub>2</sub>)–H<sub>2</sub>O-coal can impact the pore structure of coal, thereby bringing about changes in the spontaneous imbibition (SI) characteristics of coal. This is of great significance for the effect of hydraulic fracturing and the increase in coalbed methane production. The changes in the pore structure and imbibition characteristics of coals with different degrees of metamorphism after ScCO<sub>2</sub>-H<sub>2</sub>O treatment were studied via nuclear magnetic resonance technology. The experimental results indicate that ScCO<sub>2</sub>-H<sub>2</sub>O treatment can increase porosity, enhance pore connectivity, and significantly increase the imbibition rate. It also alters the proportions of different pores. The proportions of micropores, microfractures and fractures increase, while the proportions of small pores, mesopores and large pores decrease. This change is more significant in low-rank coal. During the SI, the main contribution to the imbibition volume of coal samples is consistent with the proportion of pore structure; hence, there are differences in the extent of changes in the SI characteristics between low-rank and high-rank coals. The numerous etched pores produced by ScCO<sub>2</sub>-H<sub>2</sub>O treatment exhibit self-similarity, reducing the roughness and complexity of the pores while enhancing connectivity. The emergence of a large number of microfractures and fractures has a minor impact on the change in SI volume and rate but affects the mode of SI.</div></div>","PeriodicalId":325,"journal":{"name":"Fuel","volume":"383 ","pages":"Article 133888"},"PeriodicalIF":6.7,"publicationDate":"2024-11-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142744652","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
FuelPub Date : 2024-11-29DOI: 10.1016/j.fuel.2024.133869
Yida Ge , Chu Zhang , Qianlong Liu , Xuedong Zhang , Jialei Chen , Muhammad Shahzad Nazir , Tian Peng
{"title":"A novel metaheuristic optimizer based on improved adaptive guided differential evolution algorithm for parameter identification of a PEMFC model","authors":"Yida Ge , Chu Zhang , Qianlong Liu , Xuedong Zhang , Jialei Chen , Muhammad Shahzad Nazir , Tian Peng","doi":"10.1016/j.fuel.2024.133869","DOIUrl":"10.1016/j.fuel.2024.133869","url":null,"abstract":"<div><div>Proton exchange membrane fuel cells (PEMFCs) have the benefits of high efficiency, fast startup, and the ability to operate at low temperatures, which can improve the efficiency of energy utilization. Accurate parameter identification can enable the PEMFC model to better predict and simulate the performance of the system under dynamic operating conditions. Based on the semi-empirical model of PEMFC, an improved adaptive guided differential evolution (AGDE) algorithm is presented by adding the roulette wheel selection (RWS) optimization-based fitness-distance balance (RFDB) and Levy flight (LF) strategies, simplified as LRFDB-AGDE. The integration of multiple enhancement strategies is for a deeper optimization of the mutation mechanism architecture of the AGDE algorithm, aiming to enhance the local and global integrated search ability of the LRFDB-AGDE algorithm, which can identify the unknown parameters of the PEMFC model more efficiently and quickly. In this study, the superior parameter identification performance of the proposed LRFDB-AGDE algorithm is validated by simulating voltage and current data from four types of PEMFCs and comparing them with traditional intelligent algorithms such as AGDE and the whale optimization algorithm (WOA). Notably, the absolute errors of the LRFDB-AGDE algorithm in identifying the four PEMFCs are all within 5%.</div></div>","PeriodicalId":325,"journal":{"name":"Fuel","volume":"383 ","pages":"Article 133869"},"PeriodicalIF":6.7,"publicationDate":"2024-11-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142744705","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
FuelPub Date : 2024-11-29DOI: 10.1016/j.fuel.2024.133835
Yizi Qiu , Yuhan Ai , Weiyu Luo, Shuyao Li, Yimin Chen, Shun Yi, Kaixin Li, Yonggang Min
{"title":"Biomass waste-derived biochar catalysts with Ru loading for selective and efficient transformation of lignin and its model compound","authors":"Yizi Qiu , Yuhan Ai , Weiyu Luo, Shuyao Li, Yimin Chen, Shun Yi, Kaixin Li, Yonggang Min","doi":"10.1016/j.fuel.2024.133835","DOIUrl":"10.1016/j.fuel.2024.133835","url":null,"abstract":"<div><div>Selective transformation of lignin and its model compound is an efficient process for the valorization of lignin to valuable biofuels and chemicals. Here a series of Ru-loaded biochar (BC) catalysts from different biomass waste were developed and applied for the hydrolygenolysis of three lignin model compounds and alkaline-treated lignin, providing both maximum sustainability and economical profitability. The BC from bamboo waste with Ru loading (designated as Ru/BABC) was found to exhibit superior catalytic performance among all the carbon catalysts, giving complete conversion of model compounds and selectivities of 80.8 %, 86.0 %, 88.8 % of monocyclic products from diphenyl ether (DPE), benzyl phenyl ether (BPE) and phenethoxybenzene (PPE) respectively. Ru/BABC also exhibited excellent stability as evidenced by the 5-time recycling experiment with minimum Ru leaching. The reaction pathways for the hydrogenolysis of three model compounds were established to reveal the catalytic mechanisms of Ru/BABC and their promotions on the product selectivity. The superiority of Ru/BABC is supposed to result from its excellent porosity, a diversity of functional groups on the support and extremely high adsorption energies for the reactants which are revealed by DFT calculations. This work aims to provide some guidance for the development of BC catalysts from biomass waste, and to shed some clues on the catalytic transformation of lignin into value-added products.</div></div>","PeriodicalId":325,"journal":{"name":"Fuel","volume":"383 ","pages":"Article 133835"},"PeriodicalIF":6.7,"publicationDate":"2024-11-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142744653","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
FuelPub Date : 2024-11-29DOI: 10.1016/j.fuel.2024.133856
Zhibin Chen , Jingyong Liu , Dajie Jia , Yan Chen , Liangzhong Li , Fatih Evrendilek , Chenyu Yang , Haoran Yuan , Yoshihiko Ninomiya , Weixin Li , Wenxiao Huang , Yao He
{"title":"Migration and transformation pathways of chlorine and sulfur in producing pyrolytic biochar of a Zn/Cd-remediating plant amended with modified kaolin","authors":"Zhibin Chen , Jingyong Liu , Dajie Jia , Yan Chen , Liangzhong Li , Fatih Evrendilek , Chenyu Yang , Haoran Yuan , Yoshihiko Ninomiya , Weixin Li , Wenxiao Huang , Yao He","doi":"10.1016/j.fuel.2024.133856","DOIUrl":"10.1016/j.fuel.2024.133856","url":null,"abstract":"<div><div>Pyrolysis of metal-rich post-harvest biomass from remediation sites to produce green, value-added products has gained interest. However, the presence of Cl and S can trigger the migration and transformation of metals during biochar production, limiting its clean utilization. This study not only explored the pyrolysis potential of <em>Pfaffia glomerata</em> (PG) biomass but also quantified the migration and transformation of Zn, Cd, and their mineral phases and interactions with Cl and S in response to the additive use of kaolin versus its modified form (MK) through thermal pre-activation and acid impregnation. The MK exhibited a high relative enrichment factor (<em>R<sub>ef</sub></em>) for Zn between 350–750 °C. Kaolin enhanced the immobilization of Cl and S in the solid biochar phase and promoted their removal from the gas phase. In particular, the additives promoted the SO<sub>2</sub> and HCl emissions between 200–400 °C, possibly due to the competitive adsorption of Si and Al with K and Ca. Sulfur-binding to Ca indirectly influenced the fixation and stabilization of Zn and Cd. In contrast, Cl directly promoted the release of Zn and Cd at the high temperatures. The addition of MK significantly improved kaolin’s ability to adsorb and immobilize Zn and Cd within the biochar, thus mitigating their potential environmental risks. For predicting jointly optimal biochar yield and quality, a multi-response artificial neural network (ANN) outperformed single-response generalized regression and boosted ANN and identified PG or PG mixed with 10 % kaolin (PK91) as the preferred feedstock type, along with specific amounts of Si, S, Al, K, Ca, and Cl.</div></div>","PeriodicalId":325,"journal":{"name":"Fuel","volume":"383 ","pages":"Article 133856"},"PeriodicalIF":6.7,"publicationDate":"2024-11-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142744651","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}