Journal of Natural Gas Chemistry最新文献

When COVID-19 came to town: Measuring the impact of the coronavirus pandemic on footfall on six high streets in England. 当 COVID-19 来到镇上：衡量冠状病毒大流行对英格兰六条商业街人流量的影响。

IF 2.6

Journal of Natural Gas Chemistry Pub Date : 2022-03-01 DOI: 10.1177/23998083211048497

Marcus Enoch, Fredrik Monsuur, Garyfalia Palaiologou, Mohammed A Quddus, Fiona Ellis-Chadwick, Craig Morton, Rod Rayner

{"title":"When COVID-19 came to town: Measuring the impact of the coronavirus pandemic on footfall on six high streets in England.","authors":"Marcus Enoch, Fredrik Monsuur, Garyfalia Palaiologou, Mohammed A Quddus, Fiona Ellis-Chadwick, Craig Morton, Rod Rayner","doi":"10.1177/23998083211048497","DOIUrl":"10.1177/23998083211048497","url":null,"abstract":"Town centres in the economically developed world have struggled in recent years to attract sufficient visitors to remain economically sustainable. However, decline has not been uniform, and there is considerable variation in how different town centres have coped with these challenges. The arrival of the coronavirus (COVID-19) pandemic public health emergency in early 2020 has provided an additional reason for people to avoid urban centres for a sustained period. This paper investigates the impact of coronavirus on footfall in six town centres in England that exhibit different characteristics. It presents individual time series intervention model results based on data collected from Wi-fi footfall monitoring equipment and secondary sources over a 2-year period to understand the significance of the pandemic on different types of town centre environment. The data show that footfall levels fell by 57%-75% as a result of the lockdown applied in March 2020 and have subsequently recovered at different rates as the restrictions have been lifted. The results indicate that the smaller centres modelled have tended to be less impacted by the pandemic, with one possible explanation being that they are much less dependent on serving longer-distance commuters and on visitors making much more discretionary trips from further afield. It also suggests that recovery might take longer than previously thought. Overall, this is the first paper to study the interplay between footfall and resilience (as opposed to vitality) within the town centre context and to provide detailed observations on the impact of the first wave of coronavirus on town centres' activity.","PeriodicalId":56116,"journal":{"name":"Journal of Natural Gas Chemistry","volume":"17 1","pages":"1091-1111"},"PeriodicalIF":2.6,"publicationDate":"2022-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8899842/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78738982","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Cobalt supported on CNTs-covered γ- and nano-structured alumina catalysts utilized for wax selective Fischer-Tropsch synthesis 钴负载的碳纳米管覆盖γ和纳米结构氧化铝催化剂用于蜡选择性费托合成

Journal of Natural Gas Chemistry Pub Date : 2012-11-01 DOI: 10.1016/S1003-9953(11)60424-6

Mohammad Reza Hemmati , Mohammad Kazemeini , Farhad Khorasheh , Jamshid Zarkesh , Alimorad Rashidi

{"title":"Cobalt supported on CNTs-covered γ- and nano-structured alumina catalysts utilized for wax selective Fischer-Tropsch synthesis","authors":"Mohammad Reza Hemmati , Mohammad Kazemeini , Farhad Khorasheh , Jamshid Zarkesh , Alimorad Rashidi","doi":"10.1016/S1003-9953(11)60424-6","DOIUrl":"10.1016/S1003-9953(11)60424-6","url":null,"abstract":"<div>Cobalt supported on carbon nanotubes (CNTs)-covered alumina has been recently developed and successfully utilized as a catalyst in Fischer-Tropsch synthesis (FTS). Problems associated with shaping of Co/CNTs into extrudates or pellets as well as catalyst attrition rendered these materials unfavorable for industrial applications. In this investigation regular γ- and nano-structured (N-S) alumina as well as CNTs-covered regular γ- and N-S-alumina supports were impregnated by cobalt nitrate solution to make new cobalt-based catalysts which were also promoted by Ru. The catalysts were characterized and tested in a micro reactor to evaluate their applicability in FTS. γ-Al2O3 was prepared by calcination of bohemite and N-S-Al2O3 was prepared by sol-gel method using aluminum chloride as starting material. Catalyst evaluations indicated that N-S-Al2O3 was superior to regular γ-Al2O3 and that CNTs-covered alumina supports were favored over non-covered ones in terms of activity and heavy hydrocarbon selectivity. These were justified by porosimetric characteristics of the catalysts and existence of CNTs points of view. CNTs-covered catalysts also showed higher wax selectivity and better resistance to deactivation. Furthermore, TPR analysis indicated that the cobalt aluminate phase, which is responsible for the permanent deactivation of alumina supported Co-based catalysts, did not form on alumina supported Co-based catalysts covered with CNTs due to weaker interactions between cobalt and alumina.</div>","PeriodicalId":56116,"journal":{"name":"Journal of Natural Gas Chemistry","volume":"21 6","pages":"Pages 713-721"},"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)60424-6","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"56795476","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: 8

Methane hydrate formation and dissociation in synthetic seawater 合成海水中甲烷水合物的形成与解离

Journal of Natural Gas Chemistry Pub Date : 2012-11-01 DOI: 10.1016/S1003-9953(11)60411-8

Vikash Kumar Saw , Iqbal Ahmad , Ajay Mandal , G. Udayabhanu , Sukumar Laik

引用次数: 33

Effect of Ca promoter on LPG synthesis from syngas over hybrid catalyst Ca促进剂对混合催化剂上合成气合成LPG的影响

Journal of Natural Gas Chemistry Pub Date : 2012-11-01 DOI: 10.1016/S1003-9953(11)60415-5

Xiangang Ma, Qingjie Ge, Chuanyan Fang, Hengyong Xu

引用次数: 7

Simultaneous production and utilization of methanol for methyl formate synthesis in a looped heat exchanger reactor configuration 在环形换热器反应器结构中同时生产和利用甲醇合成甲酸甲酯

Journal of Natural Gas Chemistry Pub Date : 2012-11-01 DOI: 10.1016/S1003-9953(11)60417-9

A. Goosheneshin , R. Maleki , D. Iranshahi , M.R. Rahimpour , A. Jahanmiri

{"title":"Simultaneous production and utilization of methanol for methyl formate synthesis in a looped heat exchanger reactor configuration","authors":"A. Goosheneshin , R. Maleki , D. Iranshahi , M.R. Rahimpour , A. Jahanmiri","doi":"10.1016/S1003-9953(11)60417-9","DOIUrl":"10.1016/S1003-9953(11)60417-9","url":null,"abstract":"<div>In this investigation, a novel thermally coupled reactor (TCR) containing methyl formate (MF) production in the endothermic side and methanol synthesis in the exothermic side has been investigated. The interesting feature of this TCR is that productive methanol in the exothermic side could be recycled and used as feed of endothermic side for MF synthesis. Other important advantages of the proposed system are high production rates of hydrogen and MF. The configuration consists of two thermally coupled concentric tubular reactors. In these coupled reactors, autothermal system is obtained within the reactor. A steady-state heterogeneous model is used for simulation of the coupled reactor. The proposed model has been utilized to compare the performance of TCR with the conventional methanol reactor (CMR). Noticeable enhancement can be obtained in the performance of the reactors. The influence of operational parameters is studied on reactor performance. The results show that coupling of these reactions could be feasible and beneficial. Experimental proof-of-concept is required to validate the operation of the novel reactor.</div>","PeriodicalId":56116,"journal":{"name":"Journal of Natural Gas Chemistry","volume":"21 6","pages":"Pages 661-672"},"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)60417-9","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"56795244","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

Comparison of the activities of binder-added and binder-free Mo/HZSM-5 catalysts in methane dehydroaromatization at 1073 K in periodic CH4-H2 switch operation mode 添加和不添加粘结剂的Mo/HZSM-5催化剂在1073 K下CH4-H2周期性开关操作模式下甲烷脱氢芳构化活性的比较

Journal of Natural Gas Chemistry Pub Date : 2012-11-01 DOI: 10.1016/S1003-9953(11)60426-X

Yuebing Xu , Hongtao Ma , Yo Yamamoto , Yoshizo Suzuki , Zhanguo Zhang

{"title":"Comparison of the activities of binder-added and binder-free Mo/HZSM-5 catalysts in methane dehydroaromatization at 1073 K in periodic CH4-H2 switch operation mode","authors":"Yuebing Xu , Hongtao Ma , Yo Yamamoto , Yoshizo Suzuki , Zhanguo Zhang","doi":"10.1016/S1003-9953(11)60426-X","DOIUrl":"10.1016/S1003-9953(11)60426-X","url":null,"abstract":"<div>Three industry-supplied, well-shaped Mo/HZSM-5 catalysts, two binder-added and one binder-free, were tested for the first time in methane dehydroaromatization to benzene at 1073 K and 10000 mL/(gh) in periodic CH4-H2 switch operation mode, and their catalytic performances were compared with those of three self-prepared, binder-free powder Mo/HZSM-5 catalysts. XRD, 27Al NMR, SEM, BET and NH3-TPD characterizations of all the catalysts show that the zeolites in the two binder-added catalysts are comparable to those in the three binder-free powder catalysts in crystallinity, crystal size, micropore volume and Brønsted acidity. The test results, on the other hand, show that the catalytic performances of the two binder-added catalysts are worse than those of the four binder-free catalysts on both catalyst mass and zeolite mass bases. Then, TPO and BET measurements of all spent samples were conducted to get a deep insight into the negative effects of binder addition, and the results suggest that the binder additives functioned mainly to enhance the polyaromatization of formed aromatics to coke on their external surfaces and consequently lower the benzene formation activity and selectivity of the catalyst.</div>","PeriodicalId":56116,"journal":{"name":"Journal of Natural Gas Chemistry","volume":"21 6","pages":"Pages 729-744"},"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)60426-X","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"56795614","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: 20

Utilization of compressed natural gas for the production of carbon nanotubes 利用压缩天然气生产碳纳米管

Journal of Natural Gas Chemistry Pub Date : 2012-11-01 DOI: 10.1016/S1003-9953(11)60410-6

Kim-Yang Lee , Wei-Ming Yeoh , Siang-Piao Chai , Abdul Rahman Mohamed

引用次数: 6

CNTs tuning and vertical alignment in anodic aluminium oxide membrane 阳极氧化铝膜中碳纳米管调谐和垂直排列

Journal of Natural Gas Chemistry Pub Date : 2012-11-01 DOI: 10.1016/S1003-9953(11)60413-1

Maria Sarno, Diana Sannino, Caterina Leone, Paolo Ciambelli

引用次数: 13

In situ IR study of dimethyl oxalate hydrogenation to ethylene glycol over Cu/SiO2 catalyst Cu/SiO2催化剂上草酸二甲酯加氢制乙二醇的原位红外研究

Journal of Natural Gas Chemistry Pub Date : 2012-11-01 DOI: 10.1016/S1003-9953(11)60428-3

Shengguo Hui, Bo Zhang, Suhua Zhang, Wei Li

引用次数: 7

Perovskite LaFeO3 supported bi-metal catalyst for syngas methanation 钙钛矿LaFeO3负载双金属合成气甲烷化催化剂

Journal of Natural Gas Chemistry Pub Date : 2012-11-01 DOI: 10.1016/S1003-9953(11)60427-1

Hong Wang , Yuzhen Fang , Yuan Liu , Xue Bai

{"title":"Perovskite LaFeO3 supported bi-metal catalyst for syngas methanation","authors":"Hong Wang , Yuzhen Fang , Yuan Liu , Xue Bai","doi":"10.1016/S1003-9953(11)60427-1","DOIUrl":"10.1016/S1003-9953(11)60427-1","url":null,"abstract":"<div>LaFeO3 perovskite supported Ni and Ni-Fe catalysts were prepared and applied to methanation reaction of syngas. Two preparation methods were employed. One was one-step citrate complexing method, and the other was a two step method using citrate complexing method to produce LaFeO3 and followed by loading nickel oxide on it with impregnation. The structure evolution of the sample as prepared was investigated by XRD, TPR and TEM techniques. For the former, the chemical composites of the calcined sample are NiO-Fe2O3/LaFe1–xNixO3. After reduction and reaction of CO methanation, its composites convert to Fe-Ni@Ni/LaFeO3-La2O2CO3, in which Fe-Ni@Ni is metal particles in nano-size composed of nickel core and Fe-Ni alloy shell. For the latter, the chemical composites of the calcined sample are NiO/LaFeO3; and after reduction and reaction of CO methanation, its chemical composites change to Ni/LaFeO3. Ni/LaFeO3 catalyst is a little more active, while Fe-Ni@Ni/LaFeO3-La2O2CO3 is much more stable and shows very good resistance to carbon deposition. In this work it is aimed to show that the structure and composites of the catalysts can be tailored using perovskite-type oxide as precursor prepared with different methods and conditions. Therefore, it is a promising route to prepare supported bi-metal catalysts in nano-size for a lot of metals with desired catalytic performances.</div>","PeriodicalId":56116,"journal":{"name":"Journal of Natural Gas Chemistry","volume":"21 6","pages":"Pages 745-752"},"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)60427-1","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"56795658","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: 30