燃料化学学报最新文献

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Recent research progress in photocatalytic reduction of CO2 using g-C3N4-based heterostructures
燃料化学学报 Pub Date : 2025-01-01 DOI: 10.1016/S1872-5813(24)60482-2
Fuyan REN, Zhen SUN, Tao MA, Hao ZHANG, Meng WEI, Shuai CHEN
{"title":"Recent research progress in photocatalytic reduction of CO2 using g-C3N4-based heterostructures","authors":"Fuyan REN,&nbsp;Zhen SUN,&nbsp;Tao MA,&nbsp;Hao ZHANG,&nbsp;Meng WEI,&nbsp;Shuai CHEN","doi":"10.1016/S1872-5813(24)60482-2","DOIUrl":"10.1016/S1872-5813(24)60482-2","url":null,"abstract":"<div><div>Photocatalytic technology is capable of converting CO<sub>2</sub> into valuable hydrocarbons, providing a new way to solve the problems of fossil fuel shortage and global warming. However, conventional semiconductor photocatalysts are limited by the small specific surface area and insufficient CO<sub>2</sub> adsorption capacity. g-C<sub>3</sub>N<sub>4</sub> has attracted much attention due to its non-toxicity, high stability and low-cost. Although the photocatalytic efficiency of pure g-C<sub>3</sub>N<sub>4</sub> is constrained by the fast complexation of photogenerated electron/hole pairs, small surface area and insufficient light absorption, the charge separation, surface area and light absorption of g-C<sub>3</sub>N<sub>4</sub> can be significantly enhanced by forming heterostructure with large bandgap semiconductor. Such g-C<sub>3</sub>N<sub>4</sub>-based heterostructures include semiconductor-supported, carbon material-supported, non-metal-supported and metal-organic frameworks-supported, which show great potential in CO<sub>2</sub> photoconversion. However, modified g-C<sub>3</sub>N<sub>4</sub>-based heterostructures still face challenges and require innovation on research and design. So, this review emphasizes the importance of g-C<sub>3</sub>N<sub>4</sub>-based heterostructures in environmentally friendly and sustainable approach to CO<sub>2</sub> reduction.</div></div>","PeriodicalId":15956,"journal":{"name":"燃料化学学报","volume":"53 1","pages":"Pages 40-52"},"PeriodicalIF":0.0,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143104665","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Tuning support morphology to control alloy over PtCo/γ-Al2O3 for the preferential oxidation of CO
燃料化学学报 Pub Date : 2025-01-01 DOI: 10.1016/S1872-5813(24)60466-4
Lichuan SONG, Liding ZHONG, Jia SHEN, Yake LOU, Yun GUO, Li WANG
{"title":"Tuning support morphology to control alloy over PtCo/γ-Al2O3 for the preferential oxidation of CO","authors":"Lichuan SONG,&nbsp;Liding ZHONG,&nbsp;Jia SHEN,&nbsp;Yake LOU,&nbsp;Yun GUO,&nbsp;Li WANG","doi":"10.1016/S1872-5813(24)60466-4","DOIUrl":"10.1016/S1872-5813(24)60466-4","url":null,"abstract":"<div><div>The preferential oxidation of CO (CO-PROX) reaction is a cost-effective method for eliminating trace amounts of CO from the fuel H<sub>2</sub>. Pt-based catalysts have been extensively studied for CO-PROX, with their activity influenced by the morphology of the support. Hydrothermal synthesis was employed to produce different morphologies of γ-Al<sub>2</sub>O<sub>3</sub>: flower-like γ-Al<sub>2</sub>O<sub>3</sub>(f) exposing (110) crystal faces, sheet-like γ-Al<sub>2</sub>O<sub>3</sub>(s) revealing (100) crystal faces, and rod-like γ-Al<sub>2</sub>O<sub>3</sub>(r) displaying (111) crystal faces, followed by loading PtCo nanoparticles. The exposed crystal faces of the support impact the alloying degree of the PtCo nanoparticles, and an increase in the alloying degree correlates with enhanced catalyst reactivity. Pt<sub>3</sub>Co intermetallic compounds were identified on γ-Al<sub>2</sub>O<sub>3</sub>(f) exposing (110) crystal faces, and PtCo/γ-Al<sub>2</sub>O<sub>3</sub>(f) showed high catalytic activity in the CO-PROX reaction, achieving 100% CO conversion across a broad temperature range of 50−225 °C. In contrast, only partial alloying of PtCo was observed on γ-Al<sub>2</sub>O<sub>3</sub>(s). Furthermore, no alloying between Pt and Co occurred in PtCo/γ-Al<sub>2</sub>O<sub>3</sub>(r), resulting in a reaction rate at 50 °C that was merely 11% of that of PtCo/γ-Al<sub>2</sub>O<sub>3</sub>(f). The formation of Pt<sub>3</sub>Co intermetallic compounds led to a more oxidized state of Pt, which significantly diminished the adsorption of CO on Pt and augmented the active oxygen species, thereby facilitating the selective oxidation of CO.</div></div>","PeriodicalId":15956,"journal":{"name":"燃料化学学报","volume":"53 1","pages":"Pages 96-103"},"PeriodicalIF":0.0,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143104667","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Shell-shaped Ni3S2/NiMoP2 hetero-structure electrocatalyst for efficient water-urea electrolysis at high current density
燃料化学学报 Pub Date : 2025-01-01 DOI: 10.1016/S1872-5813(24)60476-7
Jiayi WANG , Shaojun QING , Xili TONG , Tin XIANG , Kun ZHANG , Liangji XU
{"title":"Shell-shaped Ni3S2/NiMoP2 hetero-structure electrocatalyst for efficient water-urea electrolysis at high current density","authors":"Jiayi WANG ,&nbsp;Shaojun QING ,&nbsp;Xili TONG ,&nbsp;Tin XIANG ,&nbsp;Kun ZHANG ,&nbsp;Liangji XU","doi":"10.1016/S1872-5813(24)60476-7","DOIUrl":"10.1016/S1872-5813(24)60476-7","url":null,"abstract":"<div><div>Water-urea electrolysis represents a promising avenue for nitrogen removal and efficient green hydrogen production from ammonia nitrogen wastewater. However, a key challenge, viz., the lack of bifunctional electrocatalysts with exceptional activity and long-term current stability toward hydrogen evolution reaction (HER) and urea oxidation reaction (UOR), lies in this avenue. In this regard, a shell-shaped Ni<sub>3</sub>S<sub>2</sub>/NiMoP<sub>2</sub> heterostructure was constructed on nickel foam (NF) by a hydrothermal method coupled with the gas phase phosphating. Thanks to its laminated heterogeneous nanostructure with abundant oxygen vacancy and efficient electron mass transfer, this catalyst displays excellent activity both in HER and in UOR, with an ultra-low potential of −0.205 and 1.423 V (<em>vs.</em> RHE), respectively, to achieve a large current density of 1000 mA/cm<sup>2</sup>. The dual-electrode water-urea system assembled with the bifunctional Ni<sub>3</sub>S<sub>2</sub>/NiMoP<sub>2</sub> catalyst requires only 1.580 V to achieve a current density of 500 mA/cm<sup>2</sup>, which is 159 mV lower than that in the overall water splitting. Additionally, it exhibits great durability and can operate stably and continuously for up to 100 h under high current conditions.</div></div>","PeriodicalId":15956,"journal":{"name":"燃料化学学报","volume":"53 1","pages":"Pages 116-127"},"PeriodicalIF":0.0,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143104661","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Study on the improvement of ultra-low temperature performance and adsorption mechanism of Mn and Ce based denitrification catalysts by “NO2 SCR”
燃料化学学报 Pub Date : 2025-01-01 DOI: 10.1016/S1872-5813(24)60487-1
Yupeng WANG , Youkang MA , Yonggang ZHAO , Peng CAO
{"title":"Study on the improvement of ultra-low temperature performance and adsorption mechanism of Mn and Ce based denitrification catalysts by “NO2 SCR”","authors":"Yupeng WANG ,&nbsp;Youkang MA ,&nbsp;Yonggang ZHAO ,&nbsp;Peng CAO","doi":"10.1016/S1872-5813(24)60487-1","DOIUrl":"10.1016/S1872-5813(24)60487-1","url":null,"abstract":"<div><div>The catalysts supported by Mn<sub>7</sub>Fe<sub>4</sub>Ce<sub>9</sub>O<sub><em>x</em></sub>/AlO<sub><em>x</em></sub> and Mn<sub>3</sub>Fe<sub>1</sub>Ce<sub>6</sub>O<sub><em>x</em></sub>/AlO<sub><em>x</em></sub> prepared by co-precipitation method were first evaluated by standard SCR mechanism reaction under 7777 h<sup>–1</sup> intake condition. The catalytic activity of the two catalysts was only about 10% at 60 °C. Then, the concentration ratio of NO<sub>2</sub>/NO<sub><em>x</em></sub> in intake air was increased under the same conditions, and the concentration ratio of NO<sub>2</sub>/NO<sub><em>x</em></sub> in intake air was 0, 14.3%, 28.6%, 42.8%, 57%, 71.4%, 85.7% and 100%. The results show that the denitrification efficiency of Mn<sub>3</sub>Fe<sub>1</sub>Ce<sub>6</sub>O<sub><em>x</em></sub>/AlO<sub><em>x</em></sub> catalyst can be 64% at 60 °C, which is about 58% higher than that of the first evaluation. Experimental and theoretical calculations show that Mn<sub>3</sub>Fe<sub>1</sub>Ce<sub>6</sub>O<sub><em>x</em></sub>/AlO<sub><em>x</em></sub> catalyst has larger specific surface area and stronger adsorption and activation of NO<sub>2</sub>, which improves the efficiency of NO<sub>2</sub> fast SCR mechanism reaction. At the same time, the <em>in-situ</em> infrared test found that the adsorption mode of Mn<sub>3</sub>Fe<sub>1</sub>Ce<sub>6</sub>O<sub><em>x</em></sub>/AlO<sub><em>x</em></sub> catalyst changed significantly when the concentration ratio of NO<sub>2</sub>/NO<sub><em>x</em></sub> increased, and the E-R and L-H mechanism mainly adsorbed by NH<sub>3</sub> changed to the E-R and L-H mechanism mainly adsorbed by NO<sub>2</sub>. The change of adsorption mechanism may be the key factor to improve the performance of catalyst at ultra-low temperature. This work provides a promising strategy for exploring efficient and economical denitrification of NH<sub>3</sub>-SCR, as well as experience for ultra-low temperature flue gas treatment and guidance for new flue gas treatment processes.</div></div>","PeriodicalId":15956,"journal":{"name":"燃料化学学报","volume":"53 1","pages":"Pages 138-151"},"PeriodicalIF":0.0,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143104662","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Catalytic effects of simulated biomass ashes on coal gasification reactivity and the transformation evolution of minerals during gasification process
燃料化学学报 Pub Date : 2025-01-01 DOI: 10.1016/S1872-5813(24)60483-4
Xiao LI, Rui DONG, Chaochao ZHU, Rumeng ZHANG, Tingting HUANG, Kairong LIU, Xingchuang ZHANG, Pei LI
{"title":"Catalytic effects of simulated biomass ashes on coal gasification reactivity and the transformation evolution of minerals during gasification process","authors":"Xiao LI,&nbsp;Rui DONG,&nbsp;Chaochao ZHU,&nbsp;Rumeng ZHANG,&nbsp;Tingting HUANG,&nbsp;Kairong LIU,&nbsp;Xingchuang ZHANG,&nbsp;Pei LI","doi":"10.1016/S1872-5813(24)60483-4","DOIUrl":"10.1016/S1872-5813(24)60483-4","url":null,"abstract":"<div><div>The influence of key components in biomass ash on the gasification reactivity of coal, the migration patterns of typical biomass ash components and the structural evolution characteristics of coal during gasification process were deeply investigated by using a simulated biomass ash. The results indicate that gasification temperature and Si element content are the key factors affecting the gasification reactivity of coal. When the Si/K mass ratio is 0.5 and 1.0, the gasification reactivity of the composite coal sample is larger than that of raw coal, while the Si/K mass ratio is 1.5, the gasification reactivity is less than that of raw coal. Under the experimental conditions, the composite coal sample with a Si/K mass ratio of 0.5 and a Ca/K mass ratio of 0.4 shows the greatest reactivity. The gasification reactivity index is 1.35 times higher than that of raw coal. Compared to potassium-containing minerals, the calcium-containing minerals have stronger catalysis and are more likely to react with silicates to form calcium-containing silicates, such as calcium zeolites (CaO·Al<sub>2</sub>O<sub>3</sub>·2SiO<sub>2</sub>·4H<sub>2</sub>O), thereby avoiding the reaction between potassium-containing minerals and silicates to form non-catalytic minerals, which allows potassium to fully exert its catalytic effects. Dynamic analysis implies that the shrinking core model well describes the gasification process of deashing coal catalyzed by simulated biomass ash. When the Si/K mass ratio is 0.5 and the Ca/K mass ratio is 0.4, the gasification reaction activation energy of composite coal is reduced to 174.39 kJ/mol, which is 14.32% lower than that of raw coal.</div></div>","PeriodicalId":15956,"journal":{"name":"燃料化学学报","volume":"53 1","pages":"Pages 70-81"},"PeriodicalIF":0.0,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143104666","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
De novo-design of highly exposed Co−N−C single-atom catalyst for oxygen reduction reaction
燃料化学学报 Pub Date : 2025-01-01 DOI: 10.1016/S1872-5813(24)60481-0
Dan ZHOU , Hongyue ZHU , Yang ZHAO , Yiming LIU
{"title":"De novo-design of highly exposed Co−N−C single-atom catalyst for oxygen reduction reaction","authors":"Dan ZHOU ,&nbsp;Hongyue ZHU ,&nbsp;Yang ZHAO ,&nbsp;Yiming LIU","doi":"10.1016/S1872-5813(24)60481-0","DOIUrl":"10.1016/S1872-5813(24)60481-0","url":null,"abstract":"<div><div>The nitrogen-coordinated metal single-atom catalysts (M−N−C SACs) with an ultra-high metal loading synthetized by direct high-temperature pyrolysis have been widely reported. However, most of metal single atoms in these catalysts were buried in the carbon matrix, resulting in a low metal utilization and inaccessibility for adsorption of reactants during the catalytic process. Herein, we reported a facile synthesis based on the hard-soft acid-base (HSAB) theory to fabricate Co single-atom catalysts with highly exposed metal atoms ligated to the external pyridinic-N sites of a nitrogen-doped carbon support. Benefiting from the highly accessible Co active sites, the prepared Co−N−C SAC exhibited a superior oxygen reduction reactivity comparable to that of the commercial Pt/C catalyst, showing a high turnover frequency (TOF) of 0.93 e<sup>−</sup>·s<sup>−1</sup>·site<sup>−1</sup> at 0.85 V <em>vs.</em> RHE, far exceeding those of some representative SACs with an ultra-high metal content. This work provides a rational strategy to design and prepare M−N−C single-atom catalysts featured with high site-accessibility and site-density.</div></div>","PeriodicalId":15956,"journal":{"name":"燃料化学学报","volume":"53 1","pages":"Pages 128-135"},"PeriodicalIF":0.0,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143104663","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Synergistic effect of CaO/HZSM-5 composite catalyst in regulating co-pyrolysis products of rice straw and PVC
燃料化学学报 Pub Date : 2025-01-01 DOI: 10.1016/S1872-5813(24)60484-6
Caiyun WANG , Jiaofei WANG , Yujie ZHANG , Meirong KE , Xudong SONG , Weiguang SU , Yonghui BAI , Peng Lv , Guangsuo YU
{"title":"Synergistic effect of CaO/HZSM-5 composite catalyst in regulating co-pyrolysis products of rice straw and PVC","authors":"Caiyun WANG ,&nbsp;Jiaofei WANG ,&nbsp;Yujie ZHANG ,&nbsp;Meirong KE ,&nbsp;Xudong SONG ,&nbsp;Weiguang SU ,&nbsp;Yonghui BAI ,&nbsp;Peng Lv ,&nbsp;Guangsuo YU","doi":"10.1016/S1872-5813(24)60484-6","DOIUrl":"10.1016/S1872-5813(24)60484-6","url":null,"abstract":"<div><div>Co-pyrolysis of biomass and waste plastics is one of the potential technologies to achieve the resourceful utilization of both, not only to prepare high value-added hydrocarbon-rich bio-oil, but also to achieve clean resourceful utilization of wastes and reduce environmental pollution. However, the products complexity limits its further application of co-pyrolysis technology. In this study, rice straw (RS), an agricultural waste, and polyvinyl chloride plastic (PVC) were used to investigate the individual and co-pyrolysis characteristics of them by thermogravimetric-mass spectrometry (TG-MS) and pyrolysis-gas chromatography/mass spectrometry (Py-GC/MS), and the synergistic regulation law of the pyrolysis products by CaO and HZSM-5 composite catalyst. The results show that interactions exist between PVC and RS during the co-pyrolysis process, which promotes the production of aromatic compounds. The relative content of hydrocarbon compounds in tar is as high as 66.78%. The relative content of aromatics reaches 64.17%. Compared with RS pyrolysis, content of oxygenated compounds in the co-pyrolysis tar fraction decreases by 62.05%, which effectively improves oxidative stability of the tar. CaO/HZSM-5 composite catalyst shows better light aromatic selectivity compared with the individual one. The relative content of C<sub>4</sub>–C<sub>10</sub> hydrocarbons in the pyrolysis tar increases by 2.81% and 5.06%, respectively. Under the synergistic effect of CaO/HZSM-5 composite catalyst, relative content of monocyclic aromatic hydrocarbons in the tar is 34.34%, which is larger than the theoretical calculated value of 33.03%. And relative content of PAHs is 28.21%, which is smaller than the theoretical value of 31.22%. In addition, the CaO/HZSM-5 composite catalyst promotes immobilisation of Cl in the form of chlorides such as CaCl<sub>2</sub> in the char, which significantly reduces the gas-phase release of elemental Cl.</div></div>","PeriodicalId":15956,"journal":{"name":"燃料化学学报","volume":"53 1","pages":"Pages 82-94"},"PeriodicalIF":0.0,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143104669","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Removal of elemental mercury from coal combustion flue gas by sodium halides impregnated red mud
燃料化学学报 Pub Date : 2025-01-01 DOI: 10.1016/S1872-5813(24)60501-3
Sarfraz MUHAMMAD, Yang LI, He YANG, Lijun JIN, Dekang LI, Haoquan HU
{"title":"Removal of elemental mercury from coal combustion flue gas by sodium halides impregnated red mud","authors":"Sarfraz MUHAMMAD,&nbsp;Yang LI,&nbsp;He YANG,&nbsp;Lijun JIN,&nbsp;Dekang LI,&nbsp;Haoquan HU","doi":"10.1016/S1872-5813(24)60501-3","DOIUrl":"10.1016/S1872-5813(24)60501-3","url":null,"abstract":"<div><div>Mercury removal from coal combustion flue gas remains a significant challenge for environmental protection due to the lack of cost-effective sorbents. In this study, a series of red mud (RM)-based sorbents impregnated with sodium halides (NaBr and NaI) are presented to capture elemental mercury (Hg<sup>0</sup>) from flue gas. The modified RM underwent comprehensive characterization, including analysis of its textural qualities, crystal structure, chemical composition, and thermal properties. The results indicate that the halide impregnation substantially impacts the surface area and pore size of the RM. Hg<sup>0</sup> removal performance was evaluated on a fixed-bed reactor in simulated flue gas (consisting of N<sub>2</sub>, O<sub>2</sub>, CO<sub>2</sub>, NO and SO<sub>2</sub>, etc.) on a modified RM. At an optimal adsorption temperature of 160 °C, NaI-modified sorbent (RMI5) offers a removal efficiency of 98% in a mixture of gas, including O<sub>2</sub>, NO and HCl. Furthermore, pseudo-second-order model fitting results demonstrate the chemisorption mechanism for the adsorption of Hg<sup>0</sup> in kinetic investigations.</div></div>","PeriodicalId":15956,"journal":{"name":"燃料化学学报","volume":"53 1","pages":"Pages 53-67"},"PeriodicalIF":0.0,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143104664","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Low temperature hydrocracking of 9,10-dihydrophenanthrene over Brønsted acidic zeolite Y
燃料化学学报 Pub Date : 2024-12-01 DOI: 10.1016/S1872-5813(24)60480-9
Yijing LI, Hanqiong JIA, Wenming HAO, Jinghong MA, Ruifeng LI
{"title":"Low temperature hydrocracking of 9,10-dihydrophenanthrene over Brønsted acidic zeolite Y","authors":"Yijing LI,&nbsp;Hanqiong JIA,&nbsp;Wenming HAO,&nbsp;Jinghong MA,&nbsp;Ruifeng LI","doi":"10.1016/S1872-5813(24)60480-9","DOIUrl":"10.1016/S1872-5813(24)60480-9","url":null,"abstract":"<div><div>Facing the escalating challenge of processing heavier and lower-quality crude oils, the utilization of light cycle oil (LCO) derived from fluid catalytic cracking units is constrained by its high aromatic content. The transformation of LCO into lighter aromatic hydrocarbons through catalytic conversion emerges as a more advantageous and valuable strategy, addressing the surplus of diesel and the scarcity of light aromatics. Consequently, the hydroconversion of 9,10-dihydrophenanthrene (9,10-DHP), serving as a representative molecule of polycyclic aromatic hydrocarbons (PAHs), over metal-free zeolite Y catalysts with varying acidity, has been investigated in a stirred batch reactor. The experiments were conducted at temperatures ranging from 250 to 350 ℃ under a pressure of 4.0 MPa. The study delved into the impact of reaction temperature and the Brønsted acidity of zeolite Y on the reaction pathway. Product analysis revealed the formation of a diverse array of products, including biphenyls, naphthalenes, tetralins, indanes, alkylbenzenes, benzene, and minor alkanes, during the hydrocracking of 9,10-DHP. The reaction pathway for the hydrocracking of 9,10-DHP to monocyclic aromatic hydrocarbons (MAHs) over acidic zeolite Y was proposed to follow two potential routes: one involving hydrogen transfer leading to the formation of phenanthrene and tetrahydrophenanthrene, followed by terminal ring opening; the other characterized by a direct central ring opening. The interplay between these two pathways is contingent upon the reaction temperature and the acidity of the employed zeolite. Promoting central ring opening and suppressing hydrogen transfer can be realized by manipulating the reaction temperature and enhancing the acid density of the zeolite. However, excessive hydrogenation and cracking are observed with further increases in reaction temperature. Additionally, augmenting the strength of acidic sites is beneficial for ring opening and isomerization of hydrogenated aromatics, as well as dealkylation to produce MAHs. The findings underscore a promising approach for the design of PAHs hydrocracking catalysts and reaction techniques.</div></div>","PeriodicalId":15956,"journal":{"name":"燃料化学学报","volume":"52 12","pages":"Pages 1848-1856"},"PeriodicalIF":0.0,"publicationDate":"2024-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143136734","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Tar formation characteristic of integrated process of coal pyrolysis with dry reforming of low carbon alkane over Ni/La2O3-ZrO2
燃料化学学报 Pub Date : 2024-12-01 DOI: 10.1016/S1872-5813(24)60479-2
Jiannan LÜ, Yang LI, Lijun JIN, Haoquan HU
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