检索结果-南通市图书馆

co2 capture over molecular basket sorbents:Effects of SiO2 supports and PEG additive

Journal of Energy Chemistry 2017年第5期26卷 1030-1038页

作者： Lin Zhang Xiaoxing Wang Mamoru Fujii Linjun Yang Chunshan Song Key Laboratory of Energy Thermal conversion and control Ministry of EducationSchool of Energy and EnvironmentSoutheast UniversityNanjing 210096JiangsuChina Clean Fuels and Catalysis Program EMS Energy InstitutePSU-DUT Joint Center for Energy ResearchUSA Department of Energy&Mineral Engineering Pennsylvania State UniversityUniversity ParkPA 16802USA

The objective of this work is to study the influences of silica supports and PEG additive on the sorption performance of molecular basket sorbent（MBS） for cocapture consisting of polyethylenimine and one of the following supports: SBA-15（2-D structure）, TUD-1（3-D sponge-like structure） and fumed silica HS-5（3-D disordered structure）. Effects of the supports regarding pore structures and pore properties, the PEI loading amount as well as the sorption temperature were examined. Furthermore, polyethylene glycol（PEG） was introduced as an additive into the sorbents and its effect was investigated at different PEI loadings and sorption temperatures. The results suggest that the pore properties of MBS（after PEI loading） play a more important role in the cosorption capacity, rather than those of the supports alone.MBS with 3D pore structure exhibits higher cosorption capacity and amine efficiency than those with 2D-structured support. Among the sorbents studied, fumed silica（HS-5） based MBS showed the highest cosorption capacity in the temperature range of 30-95 °C, probably due to its unique interstitial pores formed by the aggregation of polymer-loaded SiOparticles. It was found that the temperature dependence is directly related to the PEI surface coverage layers. The more PEI surface coverage layers, the higher diffusion barrier for coand the stronger temperature dependence of cocapacity. 3D MBS exceeds 2D MBS at the same PEI coverage layers due to lower diffusion barrier. Adding PEG can significantly enhance the cosorption capacity and improve amine efficiency of all MBS, most likely by alleviating the diffusion barrier within PEI bulk layers through the inter-molecular interaction between PEI and PEG.

关键词： co2 capture Molecular basket sorbents Mesoporous molecular sieve Polyethylenimine(PEI) Polyethylene glycol(PEG)

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

co2 capture by aqueous ammonia process in the clean development mechanism for Nigerian oil industry

引用

Frontiers of Chemical Science and Engineering 2013年第3期7卷 366-380页

作者： A. A. Olajire Industrial and Environmental Chemistry Unit Department of Pure and Applied Chemistry Ladoke Akintola University of Technology Ogbomoso Nigeria

The clean development mechanism （CDM） of the Kyoto Protocol offers developing countries the opportunity to participate in the effort to reduce global greenhouse gas levels and also benefit from sustainable development opportunities. To date, the majority of CDM investments have gone to emerging markets such as China, India, Brazil, and Mexico, while developing countries such as Nigeria have largely been absent from the program. Chemical sequestration using aqueous ammonia process （AAP） offers a clean low carbon technology for the efficient conversion of captured C02 into clean C02 which could be injected into oil field for enhanced oil recovery or as fertilizer source. CDM-CCS （carbon capture and storage） project with AAP has the potential as intervention for leveraging sustainable livelihood development （organic fertilizer for food production） as well as for tackling local （land air and water） and global pollution （reduce methane, SOx and NOx emissions）.

关键词： co2 capture CDM AAP EOR fertilizer

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Al2O3 and CeO2-promoted MgO sorbents for co2 capture at moderate temperatures

引用

Frontiers of Chemical Science and Engineering 2018年第1期12卷 83-93页

作者： Huimei Yu Xiaoxing Wang Zhu Shu Mamoru Fujii Chunshan Song EMS Energy Institute PSU-DUT Joint Center for Energy Research and Department of Energy & Mineral Engineering Pennsylvania State University University Park 16802 USA Shanghai Institute of Ceramics Chinese Academy of Sciences Shanghai 200050 China East China University of Science and Technology Shanghai 200237 China

A series of Al2O3 and CeO2 modified MgO sorbents was prepared and studied for co2 sorption at moderate temperatures. The co2 sorption capacity of MgO was enhanced with the addition of either Al2O3 or CeO2. Over Al2O3-MgO sorbents, the best capacity of 24.6 mg- co2/g-sorbent was attained at 100 ℃, which was 61% higher than that of MgO （15.3 mg-co2/g-sorbent）. The highest capacity of 35.3 mg-co2/g-sorbent was obtained over the CeO2-MgO sorbents at the optimal temperature of 200 ℃. combining with the characterization results, we conclude that the promotion effect on co2 sorption with the addition of Al2O3 and CeO2 can be attributed to the increased surface area with reduced MgO crystallite size. Moreover, the addition of CeO2 increased the basicity of MgO phase, resulting in more increase in the co2 capacity than Al2O3 promoter. Both the Al2O3-MgO and CeO2- MgO sorbents exhibited better cyclic stability than MgO over the course of fifteen co2 sorption-desorption cycles. compared to Al2O3, CeO2 is more effective for promoting the co2 capacity of MgO. To enhance the co2 capacity of MgO sorbent, increasing the basicity is more effective than the increase in the surface area.

关键词： co2 capture MgO sorbents Al2O3 CeO2,flue gas

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Fundamentals in co2 capture of Na2co3 under a moist condition

引用

Journal of Energy Chemistry 2017年第5期26卷 972-983页

作者： Hongchao Luo Hirofumi Kanoh Graduate School of Science Chiba University1-33 Yayoi-ChoInage-KuChibaJapan

Capacity and kinetics of cocapture of Nacowere studied to determine the mechanism for cosequestration under ambient conditions. Bicarbonate formation of Nacowas examined by a thermogravimetric analysis（TGA） under various coand water vapor concentrations and the accompanying structural changes of Nacowere demonstrated by X-ray diffraction（XRD）. Morphological variations were observed during the reaction of cocapture through scanning electron microscope（SEM）. Structural changes and morphological variations, which occurred during the course of the reaction, were then connected to the kinetic and exothermic properties of the cocapture process from the XRD and SEM measurements. The results showed that the bicarbonate formation of Nacohas two different pathways.For higher coand HO concentrations, the bicarbonate formation proceeded effectively. However, for lower coand HO concentrations, the reactions were more complicated. The formation of Naco·HO from Nacoas the first step, followed by the subsequent formation of NaH（co）, and then the bicarbonate formation proceeds. To understand such fundamental properties in cocapture of Nacois very important for utilization of Nacoas a sorbent for cocapture.

关键词： co2 capture Sodium carbonate Moist condition Bicarbonate formation

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

A comparative process simulation study of Ca-Cu looping involving post-combustion co2 capture

引用

Chinese Journal of Chemical Engineering 2020年第9期28卷 2382-2390页

作者： Xiaoyu Wang Haibo Zhao Mingze Su State Key Laboratory of coal combustion School of Energy and Power EngineeringHuazhong University of Science and TechnologyWuhan 430074China

This work presents a simulation study of several Ca-Cu looping variants with co(2)capture,aiming at both parameter optimization and exergy analysis of these Ca-Cu looping systems.Three kinds of Ca-Cu looping are considered:(1)carbonation-calcination/reduction-oxidation;(2)carbonation-oxidation-calcination/reduction and (3)carbona tion/oxidation-calcination/reduction.A conventional Ca looping is also simulated for comparison.The influences of the calcination temperature on the mole fractions of co(2)and CaO at the calciner outlet,the Caco3 flow rate on the carbonator performance and the Cu/Ca ratio on the calciner performance are analyzed.The second kind of Ca-Cu looping has the highest carbonation conversion.At 1×10^5 Pa and 820℃,complete decomposition of Caco3 can be achieved in three Ca-Cu looping systems,while the operation condition of 1×10^5 Pa,840℃is required for the conventional Ca looping system.Furthermore,the Cu/Ca molar ratio of 5.13-5.19 is required for the Ca-Cu looping.Exergy analyses show that the maximum exergy destruction occurs in the calciner for the four modes and the second Ca-Cu looping system(i.e.,carbonation-oxidation-calcination/reduction)performs the highest exergy efficiency,up to 65.04%,which is about 30%higher than that of the conventional Ca looping.

关键词： Ca-Cu looping co2 capture Process systems Numerical simulation Exergy

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Improvement of co2 capture performance of calcium-based absorbent modified with palygorskite

引用

Chinese Journal of Chemical Engineering 2016年第9期24卷 1283-1289页

作者： Liyuan Shan Hui Li Binglu Meng Youhai Yu Yonggang Min college of Material and Mineral Resource Xi'an University of Architecture and TechnologyXi'an 710055China Shaanxi Techno-Institute of Recycling Economy Xi'an 710055China Xi'an Institute of Optics and Precision Mechanics of Chinese Academy of Science Xi'an 710119China

Limestone can be used for co_2 capture and sequestration(CCS) in flue gas effectively. However, its CCS capability will dramatically decline after several cycles due to the surface "sintering". In this work, the limestone was modified with palygorskite to reduce sintering phenomenon between the absorbent particles during the CCS process and the carbonation rate of the limestone can be enhanced effectively. Palygorskite is a natural mineral with nano-fibrous structure which can reduce the mutual contact of limestone particles during the CCS process. The results were detected by TGA, SEM, MIP, FTIR and particle size analyzer respectively. The best co_2 capture performance of modified absorbent was 13.11% improvement with only 5 wt% palygorskite added during the CCS process after 15 cycles compared with natural absorbent. It was found that excellent microscopic structures of absorbent modified with palygorskite was created, and the surface sintering was postponed leading to co_2 capture performance enhanced under the same conditions.

关键词： co2 capture Palygorskite modification Limestone Carbonation rate Anti-sintering

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Mature versus emerging technologies for co2 capture in power plants： Key open issues in post-combustion amine scrubbing and in chemical looping combustion

引用

Frontiers of Chemical Science and Engineering 2018年第2期12卷 315-325页

作者： Giorgia De Guido Matteo compagnoni Laura A. Pellegrini Ilenia Rossetti Department of Chemistry Materials and Chemical Engineering "Giulio Natta" Politecnico di Milano Piazza Leonardo da Vinci 32 20133 MilanItaly Department of Chemistry Universita degli Studi di Milano INSTM Unit Milano-Universita and CNR-ISTM Via Camillo Golgi 19 20133 Milan Italy

Carbon capture and storage （CCS） have acquired an increasing importance in the debate on global wanning as a mean to decrease the environmental impact of energy conversion technologies, by capturing the co2 produced from the use of fossil fuels in electricity generation and industrial processes. In this respect, post-combustion systems have received great attention as a possible near-term co2 capture technology that can be retrofitted to existing power plants. This capture technology is, however, energy-intensive and results in large equipment sizes because of the large volumes of the flue gas to be treated. To cope with the demerits of other CCS technologies, the chemical looping combustion （CLC） process has been recently considered as a solution for co2 separation. It is typically referred to as a technology without energy penalty. Indeed, in CLC the fuel and the combustion air are never mixed and the gases from the oxidation of the fuel （i.e., co2 and H2O） leave the system as a separate stream and can be separated by condensation of H2O without any loss of energy. The key issue for the CLC process is to find a suitable oxygen carrier, which provides the fuel with the activated oxygen needed for combustion. The aim of this work is to explore the feasibility of using perovskites as oxygen carriers in CLC and to consider the possible advantages with respect to the scrubbing process with amines, a mature post-combustion technology for co2 separation.

关键词： co2 capture monoethanolamine chemical looping combustion oxygen carder perovskites

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Facile synthesis of microporous carbonaceous materials derived from a covalent triazine polymer for co2 capture

引用

Journal of Energy Chemistry 2017年第5期26卷 965-971页

作者： Pillaiyar Puthiaraj Wha-Seung Ahn Department of Chemistry and Chemical Engineering Inha UniversityIncheon 402-751South Korea

Highly porous nitrogen-doped carbon materials were synthesized by the carbonization of a low-cost porous covalent triazine polymer, PCTP-3, which had been synthesized by the AlClcatalyzed FriedelCrafts reaction of readily available monomers. The nature of the bond and structure of the resulting materials were confirmed using various spectroscopic methods, and the effects of KOH activation on the textural properties of the porous carbon materials were also examined. The KOH-activated porous carbon（aPCTP-3c） materials possessed a high surface area of 2271 mgand large micro/total pore volumes of 0.87/0.95 cmg, respectively, with narrower micropore size distributions than the porous carbon prepared without activation（PCTP-3c）. The aPCTP-3c exhibited the best couptakes of 284.5 and 162.3 mg gand CHuptakes of 39.6 and 25.9 mg gat 273 and 298 K/1 bar, respectively, which are comparable to the performance of some benchmark carbon materials under the same conditions. The prepared materials exhibited high co/Nselectivity and could be regenerated easily.

关键词： Porous carbons covalent triazine polymer Carbonization co2 capture Selectivity

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Simultaneous co2 capture and H2 generation using Fe2O3/Al2O3 and Fe2O3/CuO/Al2O3 as oxygen carriers in single packed bed reactor via chemical looping process

引用

Frontiers of Environmental Science & Engineering 2015年第6期9卷 1117-1129页

作者： Jie ZHU Wei WANG Xiuning HUA Zhou XIA Zhou DENG School of Environment Tsinghua University Beijing 100084 China Jian Kun New Energy Technology co. Ltd. Beijing 100085 China

The chemical looping concept provided a novel way to achieve carbon separation during the production of energy or substances. In this work, hydrogen generation with inherent co2 capture in single packed bed reactor via this concept was discussed. Two oxygen carriers, Fe203 60 wt.% and Fe2O3 55 wt.%/CuO 5 wt.% supported by Al2O3, were made by ball milling method. First, according to the characteristics of the reduction breakthrough curve, a strict fuel supply strategy was selected to achieve simultaneous co2 capture and HE production. Then, in the long term tests using co as fuel, it was proved that CuO addition improved hydrogen generation with the maximum intensity of 3700 μmol H2·g^-1 Fe2O3 compared with Fe-Al of 2300 μmol HE.g^-1 Fe2O3. The overall co2 capture efficiency remained 98%- 98.8% over 100 cycles. Moreover, the reactivity of deactivated materials was recovered nearly like that of fresh ones by sintering treatment. Finally, two kinds of complex gases consist of co, HE, CH4 and co2 were utilized as fuels to test the feasibility. The results showed all components could be completely converted by Fe-Cu- Al in the reduction stage. The intensity of hydrogen production and the overall co2 capture efficiency were in the range of 2000-2400 μnol H2^g^-1 Fe2O3 and 89%, 95%, respectively.

关键词： co2 capture chemical looping hydrogengeneration iron based oxygen carriers single packed bedreactor long-term test complex gases fuel

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

High-throughput model-building and screening of zeolitic imidazolate frameworks for co2 capture from flue gas

引用

Chinese Chemical Letters 2020年第1期31卷 227-230页

作者： Lixia Yang Chao Shi Lin Li Yi Li State Key Laboratory of Inorganic Synthesis and Preparative Chemistry College of ChemistryJilin UniversityChangchun 130012China International Center of Future Science Jilin UniversityChangchun 130012China

To find potential zeolitic imidazolate frameworks(ZIFs)for co2 capture from flue gas,we built 169,898 ZIF models from 84,949 hypothetical zeolite networks.By calculating their lattice energies,accessible volumes to co2,the isosteric adsorption heat(Qst)of H2 O,Henry’s constant ratio(SKH)of co2/N2,percent regenerability(R%),co2 working capacity(ΔNco2),co2/N2 adsorption selectivity(Sco2/N2))and adsorbent performance score(APS),we identi fied 49 hydrophobic ZIF structures that might outplay already-realised ZIFs built from the same imidazolate linkers for co2 capture from flue gas.

关键词： Zeolitic imidazolate frameworks co2 capture Molecular simulations High-throughput computations Adsorption Flue gas

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

欢迎您,

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案：

请选择收藏分类：

通借通还

欢迎您,

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：