Journal of Natural Gas Chemistry最新文献_第2页

Ruthenium promotion of Co/SBA-15 catalysts for Fischer-Tropsch synthesis in slurry-phase reactors 钌对Co/SBA-15固相法合成催化剂的促进作用

Journal of Natural Gas Chemistry Pub Date : 2012-11-01 DOI: 10.1016/S1003-9953(11)60425-8

Jocielys Jovelino Rodrigues , Gina Pecchi , Fabiano André Narciso Fernandes , Meiry Gláucia Freire Rodrigues

{"title":"Ruthenium promotion of Co/SBA-15 catalysts for Fischer-Tropsch synthesis in slurry-phase reactors","authors":"Jocielys Jovelino Rodrigues , Gina Pecchi , Fabiano André Narciso Fernandes , Meiry Gláucia Freire Rodrigues","doi":"10.1016/S1003-9953(11)60425-8","DOIUrl":"10.1016/S1003-9953(11)60425-8","url":null,"abstract":"<div>The aim of this work was to evaluate the catalytic properties of a Ru promoted Co/SBA-15 catalyst for Fischer-Tropsch synthesis (FTS). The Ru promoted Co/SBA-15 catalyst was prepared by wet impregnation method and was characterized by X-ray diffraction, X-ray energy dispersion spectrophotometer, N2 adsorption-desorption, temperature-programmed reduction and transmission electron microscopy. The Fischer-Tropsch synthesis using the catalyst was carried out to evaluate the catalyst activity and its effect on FTS product distribution. The synthesis was carried out in a slurry reactor operating at 513 K, 20 atm, CO: H2 molar ratio of 1: 1. X-ray diffraction showed that the calcined cobalt catalyst did not modify the structure of SBA-15, proving that Co was present in the form of Co3O4 in the catalyst. The addition of cobalt in SBA-15 decreased the specific superficial area of the molecular sieve. Fischer-Tropsch synthesis activity and C5+ hydrocarbon selectivity increased with the addition of Ru. The increases in activity and selectivity were attributed to the increased number of active sites resulting from higher reducibility and the synergetic effect of Ru and Co. Ru/Co/SBA-15 catalysts showed moderate conversion (40%) and high selectivity towards the production of C5+ (80 wt%).</div>","PeriodicalId":56116,"journal":{"name":"Journal of Natural Gas Chemistry","volume":"21 6","pages":"Pages 722-728"},"PeriodicalIF":0.0,"publicationDate":"2012-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/S1003-9953(11)60425-8","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"56795518","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: 26

Thermodynamic analysis of combined reforming process using Gibbs energy minimization method: In view of solid carbon formation 基于吉布斯能量最小化法的组合重整过程热力学分析:考虑到固体碳的形成

Journal of Natural Gas Chemistry Pub Date : 2012-11-01 DOI: 10.1016/S1003-9953(11)60421-0

Behzad Nematollahi , Mehran Rezaei , Ebrahim Nemati Lay , Majid Khajenoori

引用次数: 40

Simulation and energy performance assessment of CO2 removal from crude synthetic natural gas via physical absorption process 物理吸收法脱除粗合成天然气中CO2的模拟及能源性能评价

Journal of Natural Gas Chemistry Pub Date : 2012-11-01 DOI: 10.1016/S1003-9953(11)60412-X

Wanjun Guo , Fei Feng , Guohui Song , Jun Xiao , Laihong Shen

{"title":"Simulation and energy performance assessment of CO2 removal from crude synthetic natural gas via physical absorption process","authors":"Wanjun Guo , Fei Feng , Guohui Song , Jun Xiao , Laihong Shen","doi":"10.1016/S1003-9953(11)60412-X","DOIUrl":"10.1016/S1003-9953(11)60412-X","url":null,"abstract":"<div>The paper presents an energy performance assessment of CO2 removal for crude synthetic natural gas (SNG) upgrade by Selexol absorption process. A simplified process simulation of the Selexol process concerning power requirement and separation performance was developed. The assessment indicates that less pressure difference between crude SNG and absorption pressure favors the energy performance of CO2 removal process. When both crude SNG and absorption pressures are 20 bar, CO2 removal process has the best energy performance. The optimal specific power consumption of the CO2 removal process is 566 kJ/kgCO2. The sensitivity analysis shows that the CO2 removal efficiency would significantly influence the total power consumption of the removal process, as well as higher heating value (HHV) and CO2 content in SNG. However, the specific power consumption excluding crude SNG and SNG compressions changes little with the variance of CO2 removal efficiency. If by-product CO2 is compressed for CO2 capture, the process would turn into a CO2-sink for the atmosphere. Correspondingly, an increase of 281 kJ/kgCO2 in specific power consumption is required for compressing the separated CO2.</div>","PeriodicalId":56116,"journal":{"name":"Journal of Natural Gas Chemistry","volume":"21 6","pages":"Pages 633-638"},"PeriodicalIF":0.0,"publicationDate":"2012-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/S1003-9953(11)60412-X","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"56795233","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: 22

Effects of Ru nanoparticle sizes confined in cavities of SBA-16 on the catalytic performance of Fischer-Tropsch synthesis reaction SBA-16空腔中Ru纳米颗粒尺寸对Fischer-Tropsch合成反应催化性能的影响

Journal of Natural Gas Chemistry Pub Date : 2012-11-01 DOI: 10.1016/S1003-9953(11)60418-0

Jian Chen , Jinlin Li , Yanxi Zhao , Yuhua Zhang , Jingping Hong

引用次数: 12

A DFT study of methane activation on graphite surfaces with vacancy defects 含空位缺陷石墨表面甲烷活化的DFT研究

Journal of Natural Gas Chemistry Pub Date : 2012-11-01 DOI: 10.1016/S1003-9953(11)60423-4

Fengsi Liu , Wei Chu , Wenjing Sun , Ying Xue , Qian Jiang

引用次数: 21

A high-surface-area silicoaluminophosphate material rich in Brönsted acid sites as a matrix in catalytic cracking 一种高表面积的硅铝磷酸材料，富含Brönsted酸位，用作催化裂化的基质

Journal of Natural Gas Chemistry Pub Date : 2012-11-01 DOI: 10.1016/S1003-9953(11)60420-9

Shaojun Xu , Qiang Zhang , Zhaoxuan Feng , Xiaojing Meng , Tongyu Zhao , Chunyi Li , Chaohe Yang , Honghong Shan

{"title":"A high-surface-area silicoaluminophosphate material rich in Brönsted acid sites as a matrix in catalytic cracking","authors":"Shaojun Xu , Qiang Zhang , Zhaoxuan Feng , Xiaojing Meng , Tongyu Zhao , Chunyi Li , Chaohe Yang , Honghong Shan","doi":"10.1016/S1003-9953(11)60420-9","DOIUrl":"10.1016/S1003-9953(11)60420-9","url":null,"abstract":"<div>A transparent gel-like mesoporous silicoaluminophosphate material (SAP) with a Si/Al molar ratio of 20 was synthesized by hydrothermal method. The physicochemical features of SAP were characterized by XRD, XRF, BET, SEM and FT-IR spectroscopy of pyridine adsorption techniques. The results indicated that incorporation of phosphorus (P) into aluminasilica system altered the basic textural characteristics of aluminasilica. Especially after hydrothermal treatment, the material with large special surface area (up to 492 m2/g) exhibited a good performance on hydrothermal stability. Moreover, the phosphorus modifier can not only increase the amount of Brönsted acidic sites (up to 48.44 μmol/g) and the percentage of weak acidic sites in total acidic sites, but also regulate the acid type, such as the ratio of B/L (Brönsted acid/Lewis acid) increases to 1.15. The performances of samples as matrices for the catalytic cracking of heavy vacuum gas oil (VGO) were investigated. At 520 °C, the catalysts showed much higher gasoline and diesel oil yields achieving to 45.59 wt% and 19.20 wt%, respectively, and lower coke selectivity (2.86%) than conventional FCC matrices, such as kaolin and amorphous silica-alumina.</div>","PeriodicalId":56116,"journal":{"name":"Journal of Natural Gas Chemistry","volume":"21 6","pages":"Pages 685-693"},"PeriodicalIF":0.0,"publicationDate":"2012-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/S1003-9953(11)60420-9","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"56795362","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: 12

Effect of CeO2 addition on Ni/Al2O3 catalysts for methanation of carbon dioxide with hydrogen 添加CeO2对Ni/Al2O3催化剂中二氧化碳甲烷化反应的影响

Journal of Natural Gas Chemistry Pub Date : 2012-11-01 DOI: 10.1016/S1003-9953(11)60422-2

Hezhi Liu, Xiujing Zou, Xueguang Wang, Xionggang Lu, Weizhong Ding

{"title":"Effect of CeO2 addition on Ni/Al2O3 catalysts for methanation of carbon dioxide with hydrogen","authors":"Hezhi Liu, Xiujing Zou, Xueguang Wang, Xionggang Lu, Weizhong Ding","doi":"10.1016/S1003-9953(11)60422-2","DOIUrl":"10.1016/S1003-9953(11)60422-2","url":null,"abstract":"<div>The Ni-CeO2/Al2O3 catalysts with a nickel content of 15 wt% prepared via impregnating boehmite were found to be highly active and stable for methanation of carbon dioxide with hydrogen at a H2/CO2 molar ratio of 4. The effects of CeO2 content and reaction temperature on the performance of the Ni-CeO2/Al2O3 catalysts were studied in detail. The results showed that the catalytic performance was strongly dependent on the CeO2 content in Ni-CeO2/Al2O3 catalysts and that the catalysts with 2 wt% CeO2 had the highest catalytic activity among the tested ones at 350 °C. The XRD and H2-TPR characterizations revealed that the addition of CeO2 decreased the reduction temperature by altering the interaction between Ni and Al2O3, and improved the reducibility of the catalyst. Preliminary stability test of 120 h on stream over the Ni-2CeO2/Al2O3 catalyst at 350 °C revealed that the catalyst was much better than the unpromoted one.</div>","PeriodicalId":56116,"journal":{"name":"Journal of Natural Gas Chemistry","volume":"21 6","pages":"Pages 703-707"},"PeriodicalIF":0.0,"publicationDate":"2012-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/S1003-9953(11)60422-2","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"56795796","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: 158

Effect of composite supports on the methanation activity of Co-Mo-based sulphur-resistant catalysts 复合载体对co - mo基耐硫催化剂甲烷化活性的影响

Journal of Natural Gas Chemistry Pub Date : 2012-11-01 DOI: 10.1016/S1003-9953(11)60430-1

Haiyang Wang , Zhenhua Li , Erdong Wang , Can Lin , Yuguang Shang , Guozhong Ding , Xinbin Ma , Shaodong Qin , Qi Sun

{"title":"Effect of composite supports on the methanation activity of Co-Mo-based sulphur-resistant catalysts","authors":"Haiyang Wang , Zhenhua Li , Erdong Wang , Can Lin , Yuguang Shang , Guozhong Ding , Xinbin Ma , Shaodong Qin , Qi Sun","doi":"10.1016/S1003-9953(11)60430-1","DOIUrl":"10.1016/S1003-9953(11)60430-1","url":null,"abstract":"<div>The effects of composite supports of CeO2-Al2O3, MgO-Al2O3, TiO2-Al2O3 or ZrO2-Al2O3 on the methanation activity of supported Co-Mo-based sulphur-resistant catalysts were investigated. The catalysts were further characterized by nitrogen adsorption measurement, X-ray diffraction and X-ray photoelectron spectroscopy. The catalyst of 5%CoO-15%MoO3 supported on CeO2-Al2O3, MgO-Al2O3, TiO2-Al2O3 or ZrO2-Al2O3 composite oxides, respectively, showed different catalytic performances of syngas methanation in the presence of hydrogen sulphide as compared with that of the 5%CoO-15%MoO3/Al2O3 catalyst. The Co-Mo/CeO2-Al2O3 catalyst shows the highest methanation activity among the tested catalysts. The enhanced methanation activity may be attributed to the improvement of the dispersion of active metal species and the inhibition of the formation of S6+.</div>","PeriodicalId":56116,"journal":{"name":"Journal of Natural Gas Chemistry","volume":"21 6","pages":"Pages 767-773"},"PeriodicalIF":0.0,"publicationDate":"2012-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/S1003-9953(11)60430-1","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"56795950","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: 19

Research on KOH/La-Ba-Al2O3 catalysts for biodiesel production via transesterification from microalgae oil 微藻油酯交换法制备生物柴油的KOH/La-Ba-Al2O3催化剂研究

Journal of Natural Gas Chemistry Pub Date : 2012-11-01 DOI: 10.1016/S1003-9953(11)60431-3

Xiaoyu Zhang, Qing Ma, Bibo Cheng, Jun Wang, Jinshan Li, Fude Nie

{"title":"Research on KOH/La-Ba-Al2O3 catalysts for biodiesel production via transesterification from microalgae oil","authors":"Xiaoyu Zhang, Qing Ma, Bibo Cheng, Jun Wang, Jinshan Li, Fude Nie","doi":"10.1016/S1003-9953(11)60431-3","DOIUrl":"10.1016/S1003-9953(11)60431-3","url":null,"abstract":"<div>Alumina supports modified by lanthanum (La) and barium (Ba) were prepared by peptization. Catalysts with different KOH contents supported on modified alumina were prepared by impregnation method. Various techniques, including N2 adsorption-desorption (Brunauer-Emmet-Teller method, BET), X-ray diffraction (XRD), scanning electron microscopy (SEM), and fourier transform infrared absorption spectroscopy (FT-IR). Catalytic activity for microalgae oil conversion to methyl ester via transesterification was evaluated and analyzed by GC-MS and GC. BET results showed that the support possessed high specific surface area, suitable pore volume and pore size distribution. Activity results indicated that the catalyst with 25 wt% KOH showed the best activity for microalgae oil conversion. XRD and SEM results revealed that Al–O–K compound was the active phase for microalgae oil conversion. The agglomeration and changing of pore structure should be the main reasons for the catalyst deactivation when KOH content was higher than 30 wt%.</div>","PeriodicalId":56116,"journal":{"name":"Journal of Natural Gas Chemistry","volume":"21 6","pages":"Pages 774-779"},"PeriodicalIF":0.0,"publicationDate":"2012-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/S1003-9953(11)60431-3","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"56796017","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: 34

Meso-macroporous Al2O3 supported Ru catalysts for CO preferential oxidation in hydrogen-rich gases 中-大孔Al2O3负载Ru催化剂在富氢气体中优先氧化CO

Journal of Natural Gas Chemistry Pub Date : 2012-11-01 DOI: 10.1016/S1003-9953(11)60416-7

Limiao Shen, Cheng Zhang, Yuan Liu

引用次数: 9