| 1 | Numerical evaluation of the effectiveness of NO_2 and N_2O_5 generation during the NO ozonation process显示文摘Wet scrubbing combined with ozone oxidation has become a promising technology for simultaneous removal of SO_2 and NO_x in exhaust gas.In this paper,a new 20-species,76-step detailed kinetic mechanism was proposed between O_3 and NO_x.The concentration of N_2O_5 was measured using an in-situ IR spectrometer.The numerical evaluation results kept good pace with both the public experiment results and our experiment results.Key reaction parameters for the generation of NO_2 and N_2O_5 during the NO ozonation process were investigated by a numerical simulation method.The effect of temperature on producing NO_2 was found to be negligible.To produce NO_2,the optimal residence time was1.25 sec and the molar ratio of O_3/NO about 1.For the generation of N_2O_5,the residence time should be about 8 sec while the temperature of the exhaust gas should be strictly controlled and the molar ratio of O_3/NO about 1.75.This study provided detailed investigations on the reaction parameters of ozonation of NO_x by a numerical simulation method,and the results obtained should be helpful for the design and optimization of ozone oxidation combined with the wet flue gas desulfurization methods(WFGD) method for the removal of NO_x. | Haiqiang Wang Zhuokai Zhuang Chenglang Sun Nan Zhao Yue Liu Zhongbiao Wu | 2016 | Journal of Environmental Sciences2016，28，3： | 19 |
| 2 | The numerical simulation of a new double swirl static mixer for gas reactants mixing显示文摘For the nitrogen oxide removal processes,high performance gas mixer is deeply needed for the injection of NH3 or O3.In this study,a new type of double swirl static mixer in gas mixing was investigated using computational fluid dynamics(CFD).The results obtained using Particle Image Velocimetry(PIV)correlated well with the results obtained from simulation.The comparisons in pressure loss between the experimental results and the simulation results showed that the model was suitable and accurate for the simulation of the static mixer.Optimal process conditions and design were investigated.When L/D equaled 4,coefficient of variation(COV)was<5%.The inlet velocity did not affect the distributions of turbulent kinetic energy.In terms of both COV and pressure loss,the inner connector is important in the design of the static mixer.The nozzle length should be set at 4 cm.Taking both COV and pressure loss into consideration,the optimal oblique degree is 450.The averaged kinetic energy changed according to process conditions and design.The new static mixer resulted in improved mixing performance in a more compact design.The new static mixer is more energy efficient compared with other SV static mixers.Therefore,the double swirl static mixer is promising in gas mixing. | Zhuokai Zhuang Jingtian Yan Chenglang Sun Haiqiang Wang Yuejun Wang Zhongbiao Wu | 2020 | Chinese Journal of Chemical Engineering2020，28，9： | 3 |
| 3 | Chromosome-scale genome sequence of Suaeda glauca sheds light on salt stress tolerance in halophytes显示文摘Soil salinity is a growing concern for global crop production and the sustainable development of humanity.Therefore,it is crucial to comprehend salt tolerance mechanisms and identify salt-tolerance genes to enhance crop tolerance to salt stress.Suaeda glauca,a halophyte species well adapted to the seawater environment,possesses a unique ability to absorb and retain high salt concentrations within its cells,particularly in its leaves,suggesting the presence of a distinct mechanism for salt tolerance.In this study,we performed de novo sequencing of the S.glauca genome.The genome has a size of 1.02 Gb(consisting of two sets of haplotypes)and contains 54761 annotated genes,including alleles and repeats.Comparative genomic analysis revealed a strong synteny between the genomes of S.glauca and Beta vulgaris.Of the S.glauca genome,70.56%comprises repeat sequences,with retroelements being the most abundant.Leveraging the allele-aware assembly of the S.glauca genome,we investigated genome-wide allele-specific expression in the analyzed samples.The results indicated that the diversity in promoter sequences might contribute to consistent allele-specific expression.Moreover,a systematic analysis of the ABCE gene families shed light on the formation of S.glauca’s flower morphology,suggesting that dysfunction of A-class genes is responsible for the absence of petals in S.glauca.Gene family expansion analysis demonstrated significant enrichment of Gene Ontology(GO)terms associated with DNA repair,chromosome stability,DNA demethylation,cation binding,and red/far-red light signaling pathways in the co-expanded gene families of S.glauca and S.aralocaspica,in comparison with glycophytic species within the chenopodium family.Time-course transcriptome analysis under salt treatments revealed detailed responses of S.glauca to salt tolerance,and the enrichment of the transition-upregulated genes in the leaves associated with DNA repair and chromosome stability,lipid biosynthetic process,and isoprenoid metabolic process.Additionally,genome-wide analysis of transcription factors indicated a significant expansion of FAR1 gene family.However,further investigation is needed to determine the exact role of the FAR1 gene family in salt tolerance in S.glauca. | Yan Cheng Jin Sun Mengwei Jiang Ziqiang Luo Yu Wang Yanhui Liu Weiming Li Bing Hu Chunxing Dong Kangzhuo Ye Zixian Li Fang Deng Lulu Wang Ling Cao Shijiang Cao Chenglang Pan Ping Zheng Sheng Wang Mohammad Aslam Hong Wang Yuan Qin | 2023 | Horticulture Research2023，10，9： | 0 |
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