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Carbon reduction potential and cost evaluation of different mitigation approaches in China’s coal to olefin Industry

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Journal of Environmental Sciences 2020年第4期32卷 352-363页

作者： Qun Shen Xuehang Song Fang Mao nannan Sun Xia Wen Wei Wei CAS Key Laboratory of Low-Carbon Conversion Science&Engineering Chinese Academy of SciencesShanghai201210PR China ShanghaiTech University 100 Haike RoadShanghai201210PR China Center for Excellence in Urban Atmospheric Environment Institute of Urban EnvironmentChinese Academy of SciencesXiamen361021PR China

Coal-based olefin(CTO)industry as a complement of traditional petrochemical industry plays vital role in China’s national economic development.However,high CO2 emission in CTO industry is one of the fatal problems to hinder its development.In this work,the carbon emission and mitigation potentials by different reduction pathways are evaluated.The economic cost is analyzed and compared as well.According to the industry development plan,the carbon emissions from China’s CTO industry will attain 189.43 million ton C02(MtC02)and 314.11 MtC02 in 2020 and 2030,respectively.With the advanced technology level,the maximal carbon mitigation potential could be attained to 15.3%and 21.9%in 2020 and 2030.If the other optional mitigation ways are combined together,the carbon emission could further reduce to some extent.In general,the order of mitigation potential is followed as:feedstock alteration by natural gas>C02 hydrogenation with renewable electricity applied>CCS technology.The mitigation cost analysis indicates that on the basis of 2015 situation,the economic penalty for feedstock alteration is the lowest,ranged between 186 and 451 CNY/tCO2,and the cost from CCS technology is ranged between 404 and 562 CNY/tC02,which is acceptable if the C02 enhanced oil recovery and carbon tax are considered.However,for the C02 hydrogenation technology,the cost is extremely high and there is almost no application possibility at present.

关键词： Carbon emission China’S coal to Olefin industry Reduction potential Mitigation cost

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Recent progress in Cr-based catalysts for oxidative dehydrogenation of light alkanes by employing CO_(2) as a soft oxidant

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Clean Energy 2021年第4期5卷 623-633页

作者： Pengyu Liu Lina Zhang Minkang Li nannan Sun Wei Wei CAS Key Lab of Low-Carbon Conversion Science and Engineering Shanghai Advanced Research InstituteChinese Academy of SciencesShanghai201210China University of Chinese Academy of Sciences Beijing100049China

CO_(2) can be used as a soft oxidant for oxidative dehydrogenation of light alkanes(CO_(2)-ODH),which is beneficial to realize the reuse of CO_(2) and meet the demand for olefins.The core of this reaction is the catalyst.Cr-based catalysts have attracted much attention for their excellent catalytic performance in CO_(2)-ODH reactions due to their various oxidation states and local electronic structures.In this paper,the synthesis and modification methods of Cr-based catalysts for CO_(2)-ODH are reviewed.The structure-activity relationship and reaction mechanism are also summarized.Moreover,the reasons for the deactivation of Cr-based catalysts are analysed and the main challenges faced by Cr-based catalysts in the CO_(2)-ODH process,as well as the future development trend and prospect,are discussed.

关键词： Cr-based catalysts CO_(2) alkane oxidative dehydrogenation olefin

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Nano-sized alumina supported palladium catalysts for methane combustion with excellent thermal stability

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Journal of Environmental Sciences 2023年第4期126卷 333-347页

作者： Wei Shi Guangyan Xu Xuewang Han Yingjie Wang Zhi Liu Sen Xue nannan Sun Xiaoyan Shi Yunbo Yu Hong He State Key Joint Laboratory of Environment Simulation and Pollution Control Research Center for Eco-Environmental SciencesChinese Academy of SciencesBeijing 100085China University of Chinese Academy of Sciences Beijing 100049China Weichai Power Co. Ltd.Weifang 261061China Center for Excellence in Regional Atmospheric Environment Institute of Urban EnvironmentChinese Academy of SciencesXiamen 361021China

Pd/Al_(2)O_(3)catalysts supported on Al_(2)O_(3)of different particle sizes were synthesized and applied in methane combustion.These catalysts were systematically characterized by Brunauer-Emmett-Teller (BET),X-ray diffraction (XRD),high resolution-transmission electron microscopy (HR-TEM),high-angle annular dark?eld-scanning transmission electron microscopy (HAADF-STEM),H_(2)-temperature-programmed reduction (H_(2)-TPR),O_(2)-temperature-programmed oxidation (O_(2)-TPO),X-ray photoelectron spectroscopy (XPS),and X-ray absorption?ne structure (XAFS).The characterization results indicated that nanosized Al_(2)O_(3)enabled the uniform dispersion of palladium nanoparticles,thus contributing to the excellent catalytic performance of these nano-sized Pd/Al_(2)O_(3)catalysts.Among them,Pd/Al_(2)O_(3)-nano-10 (Pd/Al_(2)O_(3)supported by alumina with an average particle size of 10 nm)showed superior catalytic activity and stability for methane oxidation under harsh practical conditions.It maintained excellent catalytic performance for methane oxidation for50 hr and remained stable even after harsh hydrothermal aging in 10 vol.%steam at 800℃ for 16 hr.Characterization results revealed that the strong metal-support interactions and physical barriers provided by Al_(2)O_(3)-nano-10 suppressed the coalescence ripening of palladium species,and thus contributed to the superior sintering resistance of the Pd/Al_(2)O_(3)-nano-10 catalyst.

关键词： Methane combustion Pd/Al_(2)O_(3) Hydrothermal stability Metal-support interaction Physical barriers

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PGC-MG7 combination could be used as a follow-up panel for monitoring dynamical progression of gastric precancerous diseases

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Chinese Journal of Cancer Research 2020年第1期32卷 89-95页

作者： Peifang Ning Liping sun nannan Dong Yuan Yuan Tumor Etiology and Screening Department of Cancer Institute and General Surgery the First Hospital of China Medical UniversityShenyang 110001China Key Laboratory of Cancer Etiology and Prevention in Liaoning Education Department the First Hospital of China Medical UniversityShenyang 110001China Pathologic Department of Cancer Hospital of China Medical University(Liaoning Cancer Hospital&Institute) Shenyang 110042China

Objective: The aim of this study was to investigate the value of the combined expression of the gastric mucosal differentiation protein pepsinogen C(PGC) and gastric cancer(GC)-associated antigen MG7 for the diagnosis of GC and prediction of the development from precancerous conditions to GC.Methods: The gastric mucosal biopsies of 285 subjects enrolled from a region with a high incidence of GC were obtained and histopathologically examined. Subjects testing negative for GC(n=208) were followed up from 1998 to 2015. The levels of PGC and MG7 in the biopsies were determined by immunohistochemistry.Results: PGC was positive in 91.4% of the non-atrophic gastritis, 26.5% of the atrophic gastritis, and 0% of the GC. MG7 was positive in 15.0% of the non-atrophic gastritis, 82.4% of the atrophic gastritis, and 94.8% of the GC. The non-atrophic gastritis group was predominantly "PGC+MG7-". The atrophic gastritis and GC groups were predominantly "PGC-MG7+". The rate of GC in subjects with "PGC-MG7+" staining was 113.4-fold higher [95% confidence interval(95% CI): 15.3-869.4, P<0.001] than that in subjects with other staining patterns.The sensitivity and specificity of the "PGC-MG7+" pattern were 92.2% and 78.8% for the detection of GC and77.2% and 97.9% for GC and precancerous disease, respectively. In the follow-up cohort of non-GC subjects, the risk of developing GC was higher in those with the "PGC-MG7+" staining pattern.Conclusions: Our data suggest that the "PGC-MG7+" pattern can be employed as a useful follow-up panel for detecting individuals with a high risk of GC, and the dynamic assessment of the follow-up panel needs multi-centre large-scale validation in the future.

关键词： Pepsinogen C gastric cancer-associated antigen MG7 gastric cancer diagnosis carcinogenesis

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Facile assembly of mesoporous silica nanoparticles with hierarchical pore structure for CO2 capture

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Chinese Chemical Letters 2019年第12期30卷 2347-2350页

作者： Tingting Song Hongyu Zhao Yu Hu nannan Sun Haijiao Zhang Institute of Nanochemistry and Nanobiology Shanghai UniversityShanghai 200444China CAS Key Lab of Low-Carbon Conversion Science and Engineering Shanghai Advanced Research InstituteChinese Academy of SciencesShanghai 201210China

In the work,we propose an efficient one-pot approach for synthesis of a new type of mesoporous silica nanoparticles(MSNs).That can be successfully realized by using tetraethylorthosilicate(TEOS) and N-[3-(trimethoxysilyl)propyl]ethylenediamine(TSD) as the silica precursors and cetyltrimethylammonium bromide(CTAB) as the structure-directing agent through a facile assembly process.The as-synthesized MSNs possess a spherical morphology with about 230 nm,a relatively high surface area of133 m^2/g,and a hierarchical pore size distribution.When applied as the sorbents,the amine-functioned MSNs demonstrate the enhanced adsorption capacity for CO2 capture(at 1 bar,15 vol% CO2,up to80.5 mg/g at 75℃),high selectivity,and good cycling durability,benefiting from the suitable modification of polyethyleneimine.

关键词： Mesoporous silica nanoparticles Hierarchical pore structure Self-assembly Amine-functionization Adsorption

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Direct conversion of methane to methanol over Cu exchanged mordenite:Effect of counter ions

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Chinese Chemical Letters 2020年第1期31卷 235-238页

作者： Chuang Ma Xianjun Tan Haijiao Zhang Qun Shen nannan Sun Wei Wei Institute of Nanochemistry and Nanobiology School of Environmental and Chemical EngineeringShanghai UniversityShanghai 200444China CAS Key Lab of Low-Carbon Conversion Science and Engineering Shanghai Advanced Research InstituteChinese Academy of SciencesShanghai 201210China School of Physical Science and Technology ShanghaiTech UniversityShanghai 201210China

Direct conversion of methane(CH4)to methanol(DMTM)is a promising,but very challenging process for the utilization of abundant CH4 as a low carbon resource.In this context,Cu loaded zeolites,mordenite(MOR)in particular,were recognized as the most effective system to perform DMTM.In this work,different Cu salts were used to exchange with MOR,by which the effect of counter ions on the catalytic performance towards DMTM was investigated.The prepared catalysts were characterized and evaluated systematically.It was found that the counter ions affected the speciation of Cu sites,probably due to their capability in extraction of protons from MOR and the influence on the hydrolysis state of the Cu2+in aqueous solution.These behaviors adjusted the association between Cu2+and the exchangeable protons in MOR.As a result,varied DMTM performance was observed.Among the used Cu salts,Cu(CH3COO)2 exchanged MOR showed the highest performance,achieving stable CH3 OH yield of 117±28μmol/g in 5 consecutive cycles,these values are among the highest for Cu loaded MOR zeolites in open publications.

关键词： Methane Methanol Zeolite Mordenite MOR Cu

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Early identification of acute hypoxia based on brain NADH fluores cence and cerebral blood flow

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Journal of Innovative Optical Health Sciences 2014年第2期7卷 153-161页

作者： Hua Shi nannan Sun Avraham Mayevsky Zhihong Zhang Qingning Luo Britton Chance Center for Biomedical Photonics Wuhan National Laboratory for Optoelectronics-Huazhong University of Scienceand Technology Wuhan 430074 P.R.China MoE Key Laboratory for Biomedical Photonics Department of Biomedical Engineering Huazhong University of Science and Technology(HUST)Wuhan 430074P.R.China

Hypoxia is closely related to many diseases and often leads to death.Early detection andidentification of the hypoxia causes may help to promptly determine the right rescue plan andreduce the mortality.We proposed a new multiparametric monitoring method employingmitochondrial reduced nicotinamide adenine dinucleotide(NA DH)fluorescence,regional reflectance,regional cerebral blood flow(CBF),electrocardiography(ECG),and respiration under sixkinds of acute hypoxia in four categories to investigate a correlation bet ween the parametervariances and the hypoxia causes.The variation patterns of the paramet ers were discussed,andthe combination of NADH and CBF may contribute to the identification of the causes of hypoxia.

关键词： Nicotinamide adenine dinucleotide fuorescence acute hypoxia carly detection cer-ebral blood flow.

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Fibroblast growth factor 9 promotes kidney cell proliferation via WNT signaling-mediated activation of ANXA4

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BIOCELL 2021年第4期45卷 985-994页

作者： TING LI XINHUI sun nannan LI HONGMIN GUO School of Bioengineering Wuhu Institute of TechnologyWuhu241003China Department of Reproductive Medicine Liaocheng People’s HospitalLiaocheng252000China

Fibroblast growth factors(FGFs)play pivotal roles in cell migration and proliferation.However,the identity of the FGF that plays a dominant role in kidney cell proliferation remains unclear.Therefore,in this study,we investigated the dominant FGF among all FGFs.To this end,RNA-sequencing,qRT-PCR,western blotting,and ChIP assays were performed.FGF9 showed the highest expression among all FGFs,and its overexpression significantly promoted proliferation in the mouse kidney cell line C57BL/6 and increased JNK and AKT phosphorylation levels.Further,RNA-seq analysis identified 365 upregulated and 276 downregulated genes in FGF9-overexpressed cells.These differentially expressed genes were classified primarily into 20 biological pathways and were enriched in 31 gene ontology terms.qRT-PCR revealed that the expression of WNT and NF-κB signaling genes,as well as ANXA4 expression patterns,correlated with the RNA-seq data,while FGF9-overexpressed cells accumulated moreβ-catenin,a key WNT signaling protein,compared to control cells.Moreover,downregulation of the gene that encodesβ-catenin or ANXA4 inhibited C57BL/6 cell proliferation.Additionally,the expression of ANXA4 was lower in CTNNB1-knockdown cells than in the control group.Additionally,the ChIP assay revealed that a transcription factor complex containing TCF4 andβ-catenin directly binds to the ANXA4 promoter.Taken together,these results suggest a role of FGF9 in the regulation of kidney cell migration.These findings may prove useful in the development of future therapies.

关键词： Fibroblast growth factor Kidney cell Proliferation ANXA4 WNT

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Utilization of Changyun Jujube, a Cultivar with Resistance to Witches Broom Disease

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Plant Diseases and Pests 2024年第3期15卷 23-25,30页

作者： Ya LIU nannan Sun Li ZHAO Jiayun LIU Xiumei GAO Shanting District Fruit Industry Service Center Zaozhuang 277200China Zaozhuang Agricultural Machinery Technology Extension Center Zaozhuang 277100China Zaozhuang Forestry Development Service Center Zaozhuang 277100China

In 2021,the Shanting District Fruit Industry Service Center conducted an application test of a treatment for jujube witches broom disease using Changyun jujube.The results demonstrated that when diseased Changhong jujube plants were grafted with Changyun jujube in the spring using bark or cleft grafting,the majority of the new shoots of Changyun jujube exhibited no symptoms of witches broom disease,while a few exhibited symptoms of the disease.With the growth of new shoots,the symptoms of witches broom disease gradually abated,returning to normal growth and development.Similarly,the symptoms of witches broom disease on the rootstock below the grafting mouth also gradually abated,returning to normal.The Changyun jujube rootstock was utilized as the intermediate rootstock to grafting the jujube cultivars Qiyuexian and Fucuimi.The two cultivars were subsequently affixed with branch bark from the witches broom disease.The two cultivars did not exhibit any symptoms of witches broom disease,thus providing an opportunity to investigate potential treatments for this disease in jujube.Finally,the cultivation techniques of the Changyun jujube were presented.

关键词： Changyun Jujube Resistance to witches broom disease Crispy jujube

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Synergistic effect of W and P on ZSM-5 and its catalytic performance in the cracking of heavy oil

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Journal of Energy Chemistry 2014年第4期23卷 519-526页

作者： Dongmin Han nannan Sun Jianwei Liu Chunyi Li Honghong Shan Chaohe Yang State Key Laboratory of Heavy Oil Processing China University of Petroleum (East China)

In order to develop the conversion of heavy oil with a high yield of propylene in the catalytic cracking process, ZSM-5 zeolite was modified by tungsten and phosphorus, which was proved to be an effective method. Characterization results show that the improvement of catalytic performance could be correlated to the interaction of phosphorus and tungsten species on ZSM-5. P inhibited the aggregation of tungsten species on ZSM-5 and was conductive to convert the tungsten species with octahedral coordination into tetrahedral coordination. And this ultimately led to that more acid sites were reserved after hydrothermal treatment in the tungsten and phosphorus co-modified ZSM-5 catalyst. Phosphorus species played an important role to restrain the dehydrogenation activity of tungsten. In addition, a model reflecting the interaction between tungsten species and ZSM-5 framework was proposed.

关键词： ZSM-5 tungsten phosphorus catalytic cracking propylene

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