Journal of Natural Gas Chemistry最新文献_第7页

Low temperature microwave-assisted vs conventional pyrolysis of various biomass feedstocks 不同生物质原料的低温微波辅助热解与常规热解

Journal of Natural Gas Chemistry Pub Date : 2012-05-01 DOI: 10.1016/S1003-9953(11)60364-2

Peter Shuttleworth , Vitaliy Budarin , Mark Gronnow , James H. Clark , Rafael Luque

引用次数: 41

Efficient CO2 capture on low-cost silica gel modified by polyethyleneimine 低成本聚乙烯亚胺改性硅胶的高效CO2捕集

Journal of Natural Gas Chemistry Pub Date : 2012-05-01 DOI: 10.1016/S1003-9953(11)60371-X

Ke Wang, Hongyan Shang, Lin Li, Xinlong Yan, Zifeng Yan, Chenguang Liu, Qingfang Zha

{"title":"Efficient CO2 capture on low-cost silica gel modified by polyethyleneimine","authors":"Ke Wang, Hongyan Shang, Lin Li, Xinlong Yan, Zifeng Yan, Chenguang Liu, Qingfang Zha","doi":"10.1016/S1003-9953(11)60371-X","DOIUrl":"10.1016/S1003-9953(11)60371-X","url":null,"abstract":"<div>In this work, a series of polyethyleneimine (PEI) functionalized commercial silica gel were prepared by wet impregnation method and used as CO2 sorbent. The as-prepared sorbents were characterized by N2 adsorption, FT-IR and SEM techniques. CO2 capture was tested in a fixed bed reactor using a simulated flue gas containing 15.1% CO2 in a temperature range of 25–100°C. The effects of sorption temperature and amine content on CO2 uptake of the adsorbents were investigated. The silica gel with a 30 wt% PEI loading manifested the largest CO2 uptake of 93.4 mgCO2/gadsorbent (equal to 311.3 mgCO2/gPEI) among the tested sorbents under the conditions of 15.1% (v/v) CO2 in N2 at 75°C and atmospheric pressure. Moreover, it was rather low-cost. In addition, the PEI-impregnated silica gel exhibited stable adsorption-desorption behavior during 5 consecutive test cycles. These results suggest that the PEI-impregnated silica gel is a promising and cost-effective sorbent for CO2 capture from flue gas and other stationary sources with low CO2 concentration.</div>","PeriodicalId":56116,"journal":{"name":"Journal of Natural Gas Chemistry","volume":"21 3","pages":"Pages 319-323"},"PeriodicalIF":0.0,"publicationDate":"2012-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/S1003-9953(11)60371-X","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"56792428","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: 39

Band gap narrowing of TiO2 by compensated codoping for enhanced photocatalytic activity 通过补偿共掺杂缩小TiO2的带隙以增强光催化活性

Journal of Natural Gas Chemistry Pub Date : 2012-05-01 DOI: 10.1016/S1003-9953(11)60368-X

Jindou Huang , Shuhao Wen , Jianyong Liu , Guozhong He

引用次数: 29

Partial amination of cationic exchange resins and its application in the hydration of butene 阳离子交换树脂的部分胺化及其在丁烯水化中的应用

Journal of Natural Gas Chemistry Pub Date : 2012-05-01 DOI: 10.1016/S1003-9953(11)60370-8

Deren Fang , Wanzhong Ren , Hongying Lü , Hongtao Yang

引用次数: 4

Selectivity modulation in the consecutive hydrogenation of benzaldehyde via functionalization of carbon nanotubes 碳纳米管功能化对苯甲醛连续加氢反应选择性的调节

Journal of Natural Gas Chemistry Pub Date : 2012-05-01 DOI: 10.1016/S1003-9953(11)60359-9

Yonghua Zhou , Jing Liu , Xingyun Li , Xiulian Pan , Xinhe Bao

引用次数: 21

Optimization of hydrothermal synthesis of H-ZSM-5 zeolite for dehydration of methanol to dimethyl ether using full factorial design 采用全因子设计优化水热合成H-ZSM-5沸石甲醇脱水制二甲醚

Journal of Natural Gas Chemistry Pub Date : 2012-05-01 DOI: 10.1016/S1003-9953(11)60375-7

Samaneh Hosseini , Majid Taghizadeh , Ali Eliassi

引用次数: 28

Effect of cerium addition on catalytic performance of PtSnNa/ZSM-5 catalyst for propane dehydrogenation 铈对PtSnNa/ZSM-5催化剂丙烷脱氢性能的影响

Journal of Natural Gas Chemistry Pub Date : 2012-05-01 DOI: 10.1016/S1003-9953(11)60372-1

Mengwei Xue , Yuming Zhou , Yiwei Zhang , Xuan Liu , Yongzheng Duan , Xiaoli Sheng

{"title":"Effect of cerium addition on catalytic performance of PtSnNa/ZSM-5 catalyst for propane dehydrogenation","authors":"Mengwei Xue , Yuming Zhou , Yiwei Zhang , Xuan Liu , Yongzheng Duan , Xiaoli Sheng","doi":"10.1016/S1003-9953(11)60372-1","DOIUrl":"10.1016/S1003-9953(11)60372-1","url":null,"abstract":"<div>The effect of cerium addition on the catalytic performance of propane dehydrogenation over PtSnNa/ZSM-5 catalyst has been investigated by reaction tests and some physicochemical characterization such as XRD, BET, TEM, XPS, NH3-TPD, H2 chemisorption, TPR and TPO techniques. It has been found that with suitable amount of cerium addition, the platinum dispersion increased, while the carbon deposition tended to be eliminated easily. In these cases, the presence of cerium could not only realize the better distribution of metallic particles on the support, but also strengthen the interactions between Sn species and the support. Additionally, XPS spectra confirmed that more amounts of tin could exist in oxidized form, which was advantageous to the reaction. In our experiments, PtSnNaCe (1.1 wt%)/ZSM-5 catalyst exhibited the best catalytic performance. After running the reaction for 750 h, propane conversion was maintained higher than 30% with the corresponding selectivity to propylene of about 97%.</div>","PeriodicalId":56116,"journal":{"name":"Journal of Natural Gas Chemistry","volume":"21 3","pages":"Pages 324-331"},"PeriodicalIF":0.0,"publicationDate":"2012-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/S1003-9953(11)60372-1","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"56792462","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: 16

Conventional processes and membrane technology for carbon dioxide removal from natural gas: A review 天然气脱除二氧化碳的常规工艺和膜技术综述

Journal of Natural Gas Chemistry Pub Date : 2012-05-01 DOI: 10.1016/S1003-9953(11)60366-6

Zee Ying Yeo , Thiam Leng Chew , Peng Wei Zhu , Abdul Rahman Mohamed , Siang-Piao Chai

{"title":"Conventional processes and membrane technology for carbon dioxide removal from natural gas: A review","authors":"Zee Ying Yeo , Thiam Leng Chew , Peng Wei Zhu , Abdul Rahman Mohamed , Siang-Piao Chai","doi":"10.1016/S1003-9953(11)60366-6","DOIUrl":"10.1016/S1003-9953(11)60366-6","url":null,"abstract":"<div>Membrane technology is becoming more important for CO2 separation from natural gas in the new era due to its process simplicity, relative ease of operation and control, compact, and easy to scale up as compared with conventional processes. Conventional processes such as absorption and adsorption for CO2 separation from natural gas are generally more energy demanding and costly for both operation and maintenance. Polymeric membranes are the current commercial membranes used for CO2 separation from natural gas. However, polymeric membranes possess drawbacks such as low permeability and selectivity, plasticization at high temperatures, as well as insufficient thermal and chemical stability. The shortcomings of commercial polymeric membranes have motivated researchers to opt for other alternatives, especially inorganic membranes due to their higher thermal stability, good chemical resistance to solvents, high mechanical strength and long lifetime. Surface modifications can be utilized in inorganic membranes to further enhance the selectivity, permeability or catalytic activities of the membrane. This paper is to provide a comprehensive review on gas separation, comparing membrane technology with other conventional methods of recovering CO2 from natural gas, challenges of current commercial polymeric membranes and inorganic membranes for CO2 removal and membrane surface modification for improved selectivity.</div>","PeriodicalId":56116,"journal":{"name":"Journal of Natural Gas Chemistry","volume":"21 3","pages":"Pages 282-298"},"PeriodicalIF":0.0,"publicationDate":"2012-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/S1003-9953(11)60366-6","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"56792508","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: 144

Rule of 100: An inherent limitation or performance measure in oxidative coupling of methane? 100规则:甲烷氧化偶联的固有限制或性能测量?

Journal of Natural Gas Chemistry Pub Date : 2012-05-01 DOI: 10.1016/S1003-9953(11)60369-1

Saeed Sahebdelfar, Maryam Takht Ravanchi, Mahtab Gharibi, Marzieh Hamidzadeh

{"title":"Rule of 100: An inherent limitation or performance measure in oxidative coupling of methane?","authors":"Saeed Sahebdelfar, Maryam Takht Ravanchi, Mahtab Gharibi, Marzieh Hamidzadeh","doi":"10.1016/S1003-9953(11)60369-1","DOIUrl":"10.1016/S1003-9953(11)60369-1","url":null,"abstract":"<div>The oxidative coupling of methane over La2O3/CaO type-catalyst in a fixed-bed reactor is studied under a wide range of operating conditions (973<T< 1103 K, 55< ptotal <220 kPa, and 3.7< mcat/VSTP <50 kg·s/m3). A ten-step kinetic model incorporating all main products was used to predict the behavior of the system. Methane conversions and C2 selectivities were calculated by varying methane to oxygen ratios in the feed under different operating conditions which were also compared with the rule of 100. The results show that deviation from this rule depends on the operating conditions. Within the range studied, an increase in pressure, temperature and contact time results in smaller deviation from the rule. This rule is best approximated when the catalyst operates near its optimal performance. For negative deviations, common to the most catalysts, it is found that the optimal performance should occur at methane conversion levels lower than 50%. A plot of selectivity versus conversion for high-yield reported performance data of a large variety of catalysts shows that data points concentrated roughly in 20%–50% methane conversion region, confirming the generality and prediction of modeling.</div>","PeriodicalId":56116,"journal":{"name":"Journal of Natural Gas Chemistry","volume":"21 3","pages":"Pages 308-313"},"PeriodicalIF":0.0,"publicationDate":"2012-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/S1003-9953(11)60369-1","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"56792818","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: 13

Easy synthesis of iron doped ordered mesoporous carbon with tunable pore sizes 易合成孔径可调铁掺杂有序介孔碳

Journal of Natural Gas Chemistry Pub Date : 2012-05-01 DOI: 10.1016/S1003-9953(11)60365-4

Haodong Tang, Guojun Lan, Jian Zhong, Huazhang Liu, Ying Li

引用次数: 5