Fuel Processing Technology最新文献_第8页

Mechanistic understanding of the C-C/C-O bonds cleavage-methylation tandem reaction for the conversion of phenolic resins to hexamethylbenzene using γ-Al2O3 利用 γ-Al2O3 将酚醛树脂转化为六甲基苯的 C-C/C-O 键裂解-甲基化串联反应的机理理解

IF 7.5 2区工程技术

Fuel Processing Technology Pub Date : 2024-03-30 DOI: 10.1016/j.fuproc.2024.108086

Gangqi Cheng , Xueru Chen , Ruizhe Chen , Jialiang Yang , Leilei Cheng , Jing Gu

{"title":"Mechanistic understanding of the C-C/C-O bonds cleavage-methylation tandem reaction for the conversion of phenolic resins to hexamethylbenzene using γ-Al2O3","authors":"Gangqi Cheng , Xueru Chen , Ruizhe Chen , Jialiang Yang , Leilei Cheng , Jing Gu","doi":"10.1016/j.fuproc.2024.108086","DOIUrl":"https://doi.org/10.1016/j.fuproc.2024.108086","url":null,"abstract":"<div>The high-value recycling of discarded phenol-formaldehyde resins (PF) remains an unresolved challenge. Herein, we propose a novel approach leveraging γ-Al2O3 to convert PF into high-value hexamethylbenzene at a low temperature using a one-pot method. This study explores the degradation capability of PF, methylation reaction efficiency, and hydrodeoxygenation capacity among various cost-effective commercial catalysts: γ-Al2O3, ZrO2, and TiO2. It reveals the influence of different reaction times on PF pyrolysis and product distribution, and it was found that high value-added hexamethylbenzene exhibited the highest yield (73.33 wt%) with selectivity (75.83%) using γ-Al2O3 at 350 °C and 2 h of reaction. Experiments using PF models demonstrate the crucial synergy between γ-Al2O3 and C(aryl)-OH in the cleavage of C(aryl)-C(alkyl) bonds and methylation reactions. A pathway for PF C-C/C-O bonds cleavage-methylation tandem reaction is proposed, based on 13C methanol isotope experiments. PF undergoes C(aryl)-C(alkyl) bond cleavage to produce phenolic intermediates, which were then methylated; this is accompanied by the cleavage of C(aryl)-OH and C(aryl)-OCH3, culminating in C-alkylation to form hexamethylbenzene. This research provides new insights into the high-value recycling of PF.</div>","PeriodicalId":326,"journal":{"name":"Fuel Processing Technology","volume":"257 ","pages":"Article 108086"},"PeriodicalIF":7.5,"publicationDate":"2024-03-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S0378382024000560/pdfft?md5=bdaadfe3ab936f2557af35447ad3d494&pid=1-s2.0-S0378382024000560-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140330956","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Effect of diffusion and metal-acid synergy on catalytic behavior of the Pd/Hierarchical SAPO-31 nanoparticles for hydroisomerization of n-hexadecane 扩散和金属酸协同作用对 Pd/Hierarchical SAPO-31 纳米颗粒催化正十六烷加氢异构化行为的影响

IF 7.5 2区工程技术

Fuel Processing Technology Pub Date : 2024-03-20 DOI: 10.1016/j.fuproc.2024.108076

Yu Zhang, Chunmu Guo, Wei Wang, Chang Xu, Wei Wu

{"title":"Effect of diffusion and metal-acid synergy on catalytic behavior of the Pd/Hierarchical SAPO-31 nanoparticles for hydroisomerization of n-hexadecane","authors":"Yu Zhang, Chunmu Guo, Wei Wang, Chang Xu, Wei Wu","doi":"10.1016/j.fuproc.2024.108076","DOIUrl":"https://doi.org/10.1016/j.fuproc.2024.108076","url":null,"abstract":"<div>The hydroisomerization of long-chain n-alkanes proves to be an effective approach for the production of renewable second-generation biodiesel, and the development of bifunctional catalysts with synergistic effect between metal and acidic sites was the key to increase the yield of iso‐alkanes. Herein, novel hierarchical SAPO-31 nanoparticles (S31-Hi) were synthesized with varied amounts of the growth inhibitor 1-octyl-3-methylimidazolium chloride ionic liquid (OMIMCl IL) in a one-stage crystallization, and a proposed formation process was discussed. The 0.1Pd/S31-Hi bifunctional catalysts were prepared by loading only 0.1 wt% Pd based on the S31-Hi by wetness impregnation method and their catalytic performances were evaluated for the hydroisomerization of n-hexadecane. The catalytic performance of 0.1Pd/S31-H based on the S31-H synthesized by adding an appropriate amount of OMIMCl ILs was significantly improved, which can be attributed to the enhanced diffusion originating from its smaller crystal size, higher Pd dispersion, and larger CPd/CH+ value, which was beneficial for achieving synergistic catalysis. The iso‐hexadecane yield of 77.8% and proportion of multi-branched isomers of 51.5%, and catalytic stability within 100 h time on stream was obtained over the 0.1Pd/S31-H at n-hexadecane conversion of 89.3%. These catalysts have application potential for the production of second-generation clean biodiesel with excellent low temperature fluidity.</div>","PeriodicalId":326,"journal":{"name":"Fuel Processing Technology","volume":"256 ","pages":"Article 108076"},"PeriodicalIF":7.5,"publicationDate":"2024-03-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S0378382024000468/pdfft?md5=6b8659cd3c3c4e0f27965ec41c1cba66&pid=1-s2.0-S0378382024000468-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140180978","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Conversion of lignin-derived ketonic intermediate to biofuel products: Syngas-assisted vs. Conventional hydrotreating 将木质素衍生酮中间体转化为生物燃料产品：合成气辅助加氢处理与传统加氢处理的比较

IF 7.5 2区工程技术

Fuel Processing Technology Pub Date : 2024-03-19 DOI: 10.1016/j.fuproc.2024.108077

Ali Bakhtyari , Adele Sakhayi , Mohammad Reza Rahimpour , Adolfo Iulianelli

{"title":"Conversion of lignin-derived ketonic intermediate to biofuel products: Syngas-assisted vs. Conventional hydrotreating","authors":"Ali Bakhtyari , Adele Sakhayi , Mohammad Reza Rahimpour , Adolfo Iulianelli","doi":"10.1016/j.fuproc.2024.108077","DOIUrl":"https://doi.org/10.1016/j.fuproc.2024.108077","url":null,"abstract":"<div>A new strategy for the transformation of an intermediate of the lignin conversion process, namely cyclohexanone, to fuel-grade products is assessed in this study. In this regard, the conventional hydrodeoxygenation process (with pure hydrogen) was compared to an innovative one with a simulated lignin-derived syngas stream in a wide range of reaction conditions (300–400 °C, 1–15 bar, and small-to-large feed-to-catalyst ratios) and over commercial molybdenum-based (nickle‑molybdenum (NiMo) and cobalt‑molybdenum(CoMo)) catalysts. Cyclohexanone conversion, product distribution, deoxygenation efficacy, and heating value were compared in each case. Cyclohexanone was transformed into cyclohexane, cyclohexene, benzene, cresols, phenol, toluene, and bi-cyclic compounds, which are beneficial in jet-fuel processing. Increasing the reaction temperature and pressure intensified the conversion of cyclohexanone (up to 87.8% conversion at 400 °C and 15 bar over both NiMo and CoMo catalysts), whereas increasing the feed-to-catalyst ratio reduced it. Operating conditions and the reducing gas (pure hydrogen or syngas) had major impacts on the conversion of cyclohexanone, deoxygenation efficiency, product distribution, and the heating value of the final product blend. The results of this study claim that cyclohexanone conversion to fuel-grade hydrocarbons (up to 97.61% over NiMo and 74.71% over CoMo catalysts) is a beneficial route and the conventional hydrodeoxygenation process can be replaced with the syngas-assisted one with a small change in production capacity, still large positive impact on the sustainability and environmental footprints of lignin conversion to biofuels.</div>","PeriodicalId":326,"journal":{"name":"Fuel Processing Technology","volume":"256 ","pages":"Article 108077"},"PeriodicalIF":7.5,"publicationDate":"2024-03-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S037838202400047X/pdfft?md5=d1467e8b1b73d5420d1142739cab5f91&pid=1-s2.0-S037838202400047X-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140164031","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Method for calculating spherical expanding flame radius considering the ignition electrode's influence 考虑到点火电极影响的球形膨胀火焰半径计算方法

IF 7.5 2区工程技术

Fuel Processing Technology Pub Date : 2024-03-15 DOI: 10.1016/j.fuproc.2024.108074

Zhiqiang Han , Mingjie Hu , Lu Xu , Zinong Zuo , Jia Fang , Yi Wu , Yan Yan , Dong Zhang , Jie Min

{"title":"Method for calculating spherical expanding flame radius considering the ignition electrode's influence","authors":"Zhiqiang Han , Mingjie Hu , Lu Xu , Zinong Zuo , Jia Fang , Yi Wu , Yan Yan , Dong Zhang , Jie Min","doi":"10.1016/j.fuproc.2024.108074","DOIUrl":"https://doi.org/10.1016/j.fuproc.2024.108074","url":null,"abstract":"<div>In this study, a method was developed to calculate the radius of a spherical expanding flame, with the goal of mitigating the effects of the ignition electrode. This approach allows for a swift determination of the ignition electrode's influence on the spherical expanding flame. It also facilitates accurate computation of the flame radius and offers a systematic means to validate the derived laminar burning velocity. Using this method as a foundation, an evaluation system was established to examine factors that could impact the method's results. Findings suggest that the laminar burning velocity determined by this method aligns more closely with numerical simulations and experimental data from referenced studies. For spherical expanding flames with convex and concave contours near the ignition electrode, the mean flame radius decreases by 0.57% to 1.22% and increases by 1.37% to 2.95%, respectively.</div>","PeriodicalId":326,"journal":{"name":"Fuel Processing Technology","volume":"256 ","pages":"Article 108074"},"PeriodicalIF":7.5,"publicationDate":"2024-03-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S0378382024000444/pdfft?md5=a03fbe30ddc92f0ea5fc6393a5b98fd1&pid=1-s2.0-S0378382024000444-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140134205","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Role of methane in ammonia combustion in air: From microscale to macroscale 甲烷在空气中燃烧氨气中的作用：从微观到宏观

IF 7.5 2区工程技术

Fuel Processing Technology Pub Date : 2024-03-14 DOI: 10.1016/j.fuproc.2024.108075

Jing Wang , Fuquan Huang , Xinyan Wang , Xi Zhuo Jiang , Kai H. Luo

{"title":"Role of methane in ammonia combustion in air: From microscale to macroscale","authors":"Jing Wang , Fuquan Huang , Xinyan Wang , Xi Zhuo Jiang , Kai H. Luo","doi":"10.1016/j.fuproc.2024.108075","DOIUrl":"https://doi.org/10.1016/j.fuproc.2024.108075","url":null,"abstract":"<div>Ammonia (NH3) has gained increasing recognition as a carbon-free fuel. To enhance NH3 combustion, reactive gases, like methane (CH4), are usually added to the combustion system. In this work, the role of CH4 in NH3 combustion is systematically studied. A series of reactive force field molecular dynamic (ReaxFF MD) simulations are implemented to investigate effects of CH4 addition on the consumption of NH3 and the yields of nitrogen oxides (NOx) from the atomic perspective: CH4 accelerates the consumption of NH3 by shortening the decomposition time of the first NH3 molecule and increasing the translational kinetic energy of the system; CH4 modifies the yield of NOx by complicating the elementary reactions and introducing additional intermediates. The fuel ratio of CH4 and NH3 between 0.5 and 1 is suggested for a cleaner and enhanced NH3 combustion. By summarising the findings from the latest publications and the present work, the role of CH4 in NH3 combustion is comprehensively analysed from the macroscale and microscale perspectives: CH4 accelerates the progress of NH3 combustion flame, activates chemical reactions, and aggravates NOx emissions at a low CH4 content. Taking the NH3/CH4 combustion as an example, this study provides an exclusive perspective to understand combustion phenomena from the microscale events to macroscale observations.</div>","PeriodicalId":326,"journal":{"name":"Fuel Processing Technology","volume":"256 ","pages":"Article 108075"},"PeriodicalIF":7.5,"publicationDate":"2024-03-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S0378382024000456/pdfft?md5=76f2c82de8aa124c480f6240811970e3&pid=1-s2.0-S0378382024000456-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140134204","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Efficient conversion of lignin-derived phenols to cycloalkanes over bifunctional catalysts with low loading of ruthenium 在低钌负载的双功能催化剂上将木质素衍生酚高效转化为环烷烃

IF 7.5 2区工程技术

Fuel Processing Technology Pub Date : 2024-03-14 DOI: 10.1016/j.fuproc.2024.108073

Zhiyu Xiang, Weichen Wang, Fangyuan Zhou, Hongke Zhang, Yidan Wang, Wanbin Zhu, Hongliang Wang

{"title":"Efficient conversion of lignin-derived phenols to cycloalkanes over bifunctional catalysts with low loading of ruthenium","authors":"Zhiyu Xiang, Weichen Wang, Fangyuan Zhou, Hongke Zhang, Yidan Wang, Wanbin Zhu, Hongliang Wang","doi":"10.1016/j.fuproc.2024.108073","DOIUrl":"https://doi.org/10.1016/j.fuproc.2024.108073","url":null,"abstract":"<div>Hydrodeoxygenation (HDO) reactions are extensively employed in the conversion of biomass to advanced fuels, which rely heavily on bifunctional catalysts that contain both a metal component and an acidic component. A significant challenge in the development of HDO catalysts is the need to reduce costs while simultaneously enhancing catalytic efficiency. Here, a series of Ru@W/ZrO2 catalysts with an extremely low loading of Ru (0.5 wt%) were successfully synthesized using different Ru or W loading sequences and different Ru/W mass ratios. The catalysts were applied in the HDO reaction of lignin-derived phenols, and their physical and chemical characteristics were revealed by various characterization techniques, including XRD, H2-TPD, NH3-TPD, and XPS. The results suggest that the synthesis method with post-loading Ru leads to improved exposure and utilization of the low-loaded Ru, which effectively serves as the active sites for hydrogenation in catalytic reactions. Under the same reaction conditions, the bifunctional catalyst with post-loading of Ru achieved a complete conversion of phenol into cyclohexane, while the catalyst with simultaneous loading of Ru and W only yielded 42% of cyclohexane. In addition, the Ru/W ratios have also shown significant effects on the HDO performance of the catalyst. The catalyst exhibits the highest hydrogenation activity when the Ru/W ratio is 10, which is further supported by kinetic experiments. This study highlights the significance of the loading sequence of noble metals and the metal/acid ratio in the synthesis of highly active bifunctional catalysts, and also lays the groundwork for the efficient utilization of noble metals in biomass HDO conversion.</div>","PeriodicalId":326,"journal":{"name":"Fuel Processing Technology","volume":"256 ","pages":"Article 108073"},"PeriodicalIF":7.5,"publicationDate":"2024-03-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S0378382024000432/pdfft?md5=463d8e92390744fc92861efb568cf33e&pid=1-s2.0-S0378382024000432-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140122804","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

High-flux alkane production from bio-derived fatty acid decarboxylation enabled by photothermal conversion effect 利用光热转换效应从生物衍生脂肪酸脱羧反应中生产高通量烷烃

IF 7.5 2区工程技术

Fuel Processing Technology Pub Date : 2024-03-08 DOI: 10.1016/j.fuproc.2024.108072

Chunlin Hao , Bin Li , Guibao Guo , Shengli An

{"title":"High-flux alkane production from bio-derived fatty acid decarboxylation enabled by photothermal conversion effect","authors":"Chunlin Hao , Bin Li , Guibao Guo , Shengli An","doi":"10.1016/j.fuproc.2024.108072","DOIUrl":"https://doi.org/10.1016/j.fuproc.2024.108072","url":null,"abstract":"<div>Heating is the most straightforward means to achieve rapid, high-throughput production for thermal catalytic reactions, but photocatalysis reactions rarely use it because its intrinsic driving force depends on the effective separation of photogenerated charges, which generally shows little or sometimes negative dependence on temperature. Here we demonstrate that the heat generated by the photothermal conversion of Bi2O3 nanoparticles can be utilized to dramatically accelerate the photocatalytic decarboxylation of long-chain fatty acids to Cn-1 n-alkanes. Using high-boiling solvents to maximize reaction temperatures, Cn-1 n-alkane can therefore be obtained in very high concentrations (e.g., ∼0.5 M) in a single operation, 5 orders of magnitude higher than the previous both semiconductor photocatalytic and algal photoenzyme transformations limited in the range ∼ 1–102 μM. Comprehensive characterizations unveil that the heat from incident light enables the standing C-chain at low temperature down onto the surface of catalyst, which allows the photoinduced hole/electron to readily approach and react with the more strained C-COO− bonds. This study manifests that the vast majority of incident light energy can be utilized in the form of heat to improve the reaction efficiency to as meet industrial output levels as possible.</div>","PeriodicalId":326,"journal":{"name":"Fuel Processing Technology","volume":"256 ","pages":"Article 108072"},"PeriodicalIF":7.5,"publicationDate":"2024-03-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S0378382024000420/pdfft?md5=160ad4295a8f9d3470ae8b8da41c95e3&pid=1-s2.0-S0378382024000420-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140062101","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Non-oxidative direct conversion of methane: Improved reactivity via linkage with dehydroaromatization 甲烷的非氧化直接转化：通过脱氢芳香化作用提高反应活性

IF 7.5 2区工程技术

Fuel Processing Technology Pub Date : 2024-03-01 DOI: 10.1016/j.fuproc.2024.108067

Jin-Ju Lee , Sungwoo Lee , Youn-Sang Bae , Jechan Lee , Yong Tae Kim

{"title":"Non-oxidative direct conversion of methane: Improved reactivity via linkage with dehydroaromatization","authors":"Jin-Ju Lee , Sungwoo Lee , Youn-Sang Bae , Jechan Lee , Yong Tae Kim","doi":"10.1016/j.fuproc.2024.108067","DOIUrl":"https://doi.org/10.1016/j.fuproc.2024.108067","url":null,"abstract":"<div>The direct conversion of methane without an oxidant is an attractive approach to increase carbon efficiency. However, the reaction must be engineered appropriately. Herein, we propose a methane to olefins, aromatics, and hydrogen (MTOAH) system in which methane activation is promoted by co-feeding hydrocarbons generated from the Mo/HZSM-5 surface. The intentional separation of the catalyst and the gas-phase reaction at different temperatures (700 °C and 1020 °C) enables active and stable methane conversion via periodic reactions and regenerations. The linkage between MDA and MTOAH using 6Mo/HZSM-5 (30), which notably contributed to increasing the C2 production in MTOAH, was stabilized with 8.2% methane conversion during 49.5 h of the periodic CH4 reaction-H2 regeneration cycle. This study provides a new direction for achieving the efficient and carbon-neutral conversion of methane into useful chemicals.</div>","PeriodicalId":326,"journal":{"name":"Fuel Processing Technology","volume":"256 ","pages":"Article 108067"},"PeriodicalIF":7.5,"publicationDate":"2024-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S0378382024000377/pdfft?md5=463ce9558a562194e2605fe1d244fd1f&pid=1-s2.0-S0378382024000377-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139999610","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Uncovering the potential of MSC CT-350 for CO2/CH4 separation toward the optimization of a Pressure Swing Adsorption process for biogas upgrading 挖掘 MSC CT-350 在二氧化碳/CH4 分离方面的潜力，优化用于沼气提纯的变压吸附工艺

IF 7.5 2区工程技术

Fuel Processing Technology Pub Date : 2024-03-01 DOI: 10.1016/j.fuproc.2024.108065

Esther Pancione , Francesco La Motta , Alessandro Boffa , Amedeo Lancia , Alessandro Erto

{"title":"Uncovering the potential of MSC CT-350 for CO2/CH4 separation toward the optimization of a Pressure Swing Adsorption process for biogas upgrading","authors":"Esther Pancione , Francesco La Motta , Alessandro Boffa , Amedeo Lancia , Alessandro Erto","doi":"10.1016/j.fuproc.2024.108065","DOIUrl":"https://doi.org/10.1016/j.fuproc.2024.108065","url":null,"abstract":"<div>A laboratory-scale fixed-bed column is employed to study the dynamic behavior of the carbon molecular sieve MSC CT-350 for CO2/CH4 separation. Breakthrough adsorption tests in single-component systems are carried out at different pressures (1, 3, 5, 6.5 and 8 bar) and constant temperature (20 °C). Moreover, an additional test is conducted with a 40% CO2/60% CH4 binary mixture at 3 bar. Desorption tests are performed by varying the purge-to-feed ratio (P/F) at 50%, 30% and 20%, optionally using a vacuum pump. Experimental results show that MSC CT-350 has a good CO2 adsorption capacity for each pressure, considerably higher than CH4. In the binary test, very slight differences are experimentally found in the adsorption kinetics and equilibrium adsorption capacity with respect to single-compound tests, which results equal to 2.16 mol kg−1 for CO2 and 0.302 mol kg−1 for CH4 at 3 bar, compared with 2.29 mol kg−1 for CO2 and 0.262 mol kg−1 for CH4 for the single-compoound counterparts. The time required for a complete regeneration decreases with the increase in purge flowrate and with the simultaneous use of the vacuum pump. Finally, CO2 adsorption is a reversible process as the CO2 adsorption capacity of the adsorbent is not significantly reduced when utilized in subsequent adsorption-desorption cycles.</div>","PeriodicalId":326,"journal":{"name":"Fuel Processing Technology","volume":"256 ","pages":"Article 108065"},"PeriodicalIF":7.5,"publicationDate":"2024-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S0378382024000353/pdfft?md5=98e2026ce84b1474882560aa0027a60c&pid=1-s2.0-S0378382024000353-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140013945","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Selective hydrogenation of γ-valerolactone to 1,4-pentanediol over hydrotalcite-derived CuCoAl catalysts 在衍生自氢化talcite的铜钴铝催化剂上将γ-戊内酯选择性氢化为 1,4-戊二醇

IF 7.5 2区工程技术

Fuel Processing Technology Pub Date : 2024-02-29 DOI: 10.1016/j.fuproc.2024.108068

Jiebang Peng , Donghong Zhang , Xin Tian , Mingyue Ding

{"title":"Selective hydrogenation of γ-valerolactone to 1,4-pentanediol over hydrotalcite-derived CuCoAl catalysts","authors":"Jiebang Peng , Donghong Zhang , Xin Tian , Mingyue Ding","doi":"10.1016/j.fuproc.2024.108068","DOIUrl":"https://doi.org/10.1016/j.fuproc.2024.108068","url":null,"abstract":"<div>In this study, a series of CuCoAl catalysts with different Cu/Co molar ratios were prepared from hydrotalcite-like precursors and then adopted for γ-valerolactone (GVL) hydrogenation to 1,4-pentanediol (1,4-PeD). By tuning the Cu/Co ratio in the CuCoAl catalysts and optimizing the reaction conditions, nearly 100% yield of 1,4-PeD was finally achieved with the Cu0.2Co0.8Al catalyst (Cu/Co = 1: 4) at 433 K and 4 MPa H2. The high activity of the Cu0.2Co0.8Al catalyst was attributed to the existence of Cu-CoOx synergistic active sites and the abundant surface acidity. The electron transfer from Cu to Co resulted in the formation oxygen-defected CoOx sites and surface acidic sites, which were beneficial for the adsorption of GVL and the activation of C-O/C=O bonds. The proximity between Cu particles and defective CoOx facilitated the dissociative adsorption of H2 on Cu0 and the subsequent hydrogen spillover to CoOx sites, thereby significantly promoted the selective hydrogenation of GVL to 1,4-PeD. In addition, applications of the Cu0.2Co0.8Al catalyst to the ring-opening reactions of other lactones (including α-adamyllactone, γ-caprolactone, δ-pentyllactone, and ε-caprolactone) were further investigated. Eventually, high yields (> 93%) of the corresponding diols were attained, demonstrating the excellent catalytic versatility of Cu0.2Co0.8Al in selective hydrogenation of lactones. Overall, this work shows high potential of hydrotalcite-derived CuCoAl catalysts for selective hydrogenation of GVL to 1,4-PeD, and provides insights for the design of efficient bimetallic catalysts in lactone hydrogenolysis.</div>","PeriodicalId":326,"journal":{"name":"Fuel Processing Technology","volume":"256 ","pages":"Article 108068"},"PeriodicalIF":7.5,"publicationDate":"2024-02-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S0378382024000389/pdfft?md5=52126577db00b0d8ee7cd76baaf8fb95&pid=1-s2.0-S0378382024000389-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139999180","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

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