Effects of incorporated oxygen and sulfur heteroatoms into ligands for CO2/N2 and CO2/CH4 separation in metal-organic frameworks: A molecular simulation study
Sign Up to like & getrecommendations! Published in 2018 at "Fuel"
DOI: 10.1016/j.fuel.2018.04.067
Abstract: Abstract CO2 separations from flue gas and natural gas are important industrial issues. As energy-efficient alternative of traditional cryogenic method, equilibrium based CO2 separation by solid porous materials, i.e. metal organic frameworks (MOFs), has shown… read more here.
Keywords: metal organic; co2; separation; co2 ch4 ... See more keywords
The phase equilibrium and density studies of the ternary mixtures of CO2 + Ar + N2 and CO2 + Ar + H2, systems relevance to CCS technology
Sign Up to like & getrecommendations! Published in 2017 at "International Journal of Greenhouse Gas Control"
DOI: 10.1016/j.ijggc.2016.11.003
Abstract: The p-T phase diagrams of two ternary systems (CO2 + Ar + N2 and CO2 + Ar + H2) have been measured at temperatures between 268 and 303 K using a fibre-optic phase equilibrium analyser.… read more here.
Keywords: co2 co2; equilibrium density; phase; phase equilibrium ... See more keywords
Effects of shielding gases on process stability of 10CrNi3MoV steel in hybrid laser-arc welding
Sign Up to like & getrecommendations! Published in 2019 at "Journal of Materials Processing Technology"
DOI: 10.1016/j.jmatprotec.2019.01.027
Abstract: Abstract Hybrid laser-arc welding (HLAW) of 10CrNi3MoV steel was carried out with different shielding gas mixtures including 100% Ar, 5% CO2 + Ar, 10% CO2 + Ar, 15% CO2 + Ar, 20% CO2 + Ar,… read more here.
Keywords: co2; hybrid laser; process; laser arc ... See more keywords
Conversion of CO2, CO, and H2 in CO2 Hydrogenation to Fungible Liquid Fuels on Fe-Based Catalysts
Sign Up to like & getrecommendations! Published in 2017 at "Industrial & Engineering Chemistry Research"
DOI: 10.1021/acs.iecr.7b01817
Abstract: CO2 hydrogenation conducted on Fe-based catalysts consists of a wide range of reactions with CO2 and H2 reacting in the reverse water–gas shift (RWGS) to produce CO and CO and H2 reacting in the Fischer–Tropsch… read more here.
Keywords: conversion co2; co2; co2 hydrogenation; based catalysts ... See more keywords
A microporous MOF with a polar pore surface exhibiting excellent selective adsorption of CO2 from CO2-N2 and CO2-CH4 gas mixtures with high CO2 loading.
Sign Up to like & getrecommendations! Published in 2017 at "Dalton transactions"
DOI: 10.1039/c7dt03341a
Abstract: A microporous MOF {[Zn(SDB)(L)0.5]·S}n (IITKGP-5) with a polar pore surface has been constructed by the combination of a V-shaped -SO2 functionalized organic linker (H2SDB = 4,4'-sulfonyldibenzoic acid) with an N-rich spacer (L = 2,5-bis(3-pyridyl)-3,4-diaza-2,4-hexadiene), forming… read more here.
Keywords: microporous mof; gas; co2; co2 ch4 ... See more keywords
Infrared spectra of both isomers of CO2-CO in the CO2 v 3 region
Sign Up to like & getrecommendations! Published in 2021 at "Molecular Physics"
DOI: 10.1080/00268976.2021.1936251
Abstract: Extensive infrared spectra of the weakly-bound CO2-CO dimer are observed in the carbon dioxide ν3 asymmetric stretch region (≈2350 cm−1) using a tunable infrared OPO laser source to probe a pulsed slit jet supersonic expansion. Both… read more here.
Keywords: isomers co2; infrared spectra; spectra isomers; co2 co2 ... See more keywords
Impact on CO2/N2 and CO2/CH4 Separation Performance Using Cu-BTC with Supported Ionic Liquids-Based Mixed Matrix Membranes
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DOI: 10.3390/membranes8040093
Abstract: The efficient separation of gases has industrial, economic, and environmental importance. Here, we report the improvement in gas separation performance of a polyimide-based matrix (Matrimid®5218) filled with a Cu-based metal organic framework [MOF, Cu3(BTC)2] with… read more here.
Keywords: co2 co2; separation performance; btc; separation ... See more keywords
温带森林不同演替阶段下的土壤CO 2 排放通量昼间变化
Sign Up to like & getrecommendations! Published in 2017 at "Acta Ecologica Sinica"
DOI: 10.5846/stxb201512182529
Abstract: 采用时空替代法，在长白山北坡分别选取了红松针阔叶混交林演替序列的5个不同阶段：草地、灌木林（幼龄林）地、白桦林地、阔叶杂木林地和红松阔叶林地，进行土壤CO2排放通量昼间变化野外同步观测研究，旨在揭示温带森林不同演替阶段下的土壤呼吸CO2排放过程的差异，探究其与温度、湿度、土壤理化性质等环境因子的关系。结果表明：（1）温带森林不同演替阶段下的土壤CO2排放通量具有统一性，均为大气CO2的源，这种统一性确保了小的时段（如昼间）观测能通过换算，实现CO2排放量的估算。（2）CO2排放通量的昼间排放都呈现出明显的单峰型，峰值在13：00-15：00左右，草地和灌木林地的峰值大概在13：00左右，明显提前于白桦林地、阔叶杂木林地和红松阔叶林地（14：00-15：00左右）。红松阔叶林地的土壤呼吸有明显的滞后性特征，峰值在15：00左右，比其他几个样地明显推迟。（3）土壤CO2排放通量平均值由低到高排列依次为草地（2.760 μmol m-2 s-1）、灌木林地（2.854 μmol m-2 s-1）、白桦林地（3.048 μmol m-2 s-1）、阔叶杂木林地（3.696 μmol m-2 s-1）、红松阔叶林地（4.61 μmol m-2 s-1）。随着温带森林演替的正向进行，土壤CO2排放通量依次增大，次序为草地 < 灌木林地 < 白桦林地 < 阔叶杂木林地 < 红松阔叶林地。（4）环境因子中，0-5 cm土壤温度与土壤CO2排放通量相关系数最高，土壤温度监测对土壤CO2排放量的估算作用明显。 read more here.
Keywords: co2; co2 co2; mol;
北京市四环路及路旁绿地CO 2 变化特征及来源分析
Sign Up to like & getrecommendations! Published in 2017 at "Acta Ecologica Sinica"
DOI: 10.5846/stxb201601200132
Abstract: 城市大气中CO2的变化特征及来源解析是制定节能减排措施的重要依据，对比非采暖季与采暖季北京市四环路（阜通东大街-京密路）路旁及距离道路100 m绿地中不同高度大气中CO2浓度，并利用Keeling plot方程结合IsoSource软件进行分析，以期获得不同季节CO2变化特征及定量估算其来源。结果表明，不同来源的CO2中具有差异显著的δ13C值，其中：土壤呼吸（-18.92‰）>植物呼吸（-23.40‰）>燃煤废气（-24.10‰）>机动车尾气（-28.14‰）>天然气废气（-33.34‰）。路旁和绿地的大气CO2浓度在采暖季中分别比非采暖季中高26.2%和41.2%，路旁与绿地的大气CO2浓度在非采暖季中差异显著而采暖季中无明显差异。在非采暖季中，CO2浓度在6：00和20：00时较高，路旁大气CO2随高度升高而降低，绿地大气CO2浓度在8 m处最高，日变化明显。在采暖季中，CO2浓度与车流量有相似的日变化趋势，在8：00和19：00时较高，路旁和绿地处大气CO2浓度都随高度的升高而降低。路旁和绿地的大气CO2来源差别明显，非采暖季中路旁大气CO2主要来自于机动车尾气而绿地中大气CO2主要来自于土壤和植物呼吸，在采暖季中路旁及绿地中大气CO2的来源差别较小，主要来自于燃煤废气和机动车尾气。 read more here.
Keywords: co2; co2 co2;
模拟CO 2 浓度升高和降雨量变化对红砂生物量分配及碳氮特征的影响
Sign Up to like & getrecommendations! Published in 2018 at "Acta Ecologica Sinica"
DOI: 10.5846/stxb201703180460
Abstract: 以荒漠优势植物红砂2年生苗木为试材，采用盆栽试验和开顶式CO2控制气室模拟CO2浓度变化（350μmol/mol和700μmol/mol）研究了红砂生物量分配及碳氮特征对降水变化减少30%、减少15%、自然降水、增加15%和增加30%（-30%、-15%、0、15%、30%）的响应。结果表明：（1）CO2浓度上升显著性的促进红砂地上茎叶和地下的根生物量，降雨量增加或减少也显著性的促进或抑制了这一作用；CO2倍增时，红砂的地上生物量在降水增加30%时平均增加了61.28%（P < 0.05），而根生物量在降水增加或减少30%时均分别增加了84%（30%）和3.21%（-30%），这种响应导致红砂根冠比在降水减少时大于降雨量增加时，CO2倍增显著地抑制了这一作用。（2）CO2浓度上升显著性地促进了红砂根、茎、叶中的碳含量，显著性地抑制了红砂根、茎、叶中氮含量，降雨量增加或减少也显著性的促进或抑制了这一作用；这种响应导致红砂根、茎、叶的C/N在降雨减少30%时增加80.22%（根）、103.02%（茎）和199.88%（叶）（P < 0.05），在降雨增加30%时增加24.99%（根）、30.27%（茎0）和104.45%（叶）（P < 0.05），CO2浓度倍增显著性地促进了这一作用。（3）以上结果表明，未来全球CO2浓度升高时，在降雨量增加地区红砂因充足的碳源和水分而得以恢复；在降雨减少的地区，CO2的升高对降雨减少造成的干旱胁迫有一定的补偿作用，红砂则以较高的根冠比来维持其在荒漠生态系统中地位。 read more here.
Keywords: co2; co2 co2; mol;
干旱对土壤剖面不同深度土壤CO 2 通量的影响
Sign Up to like & getrecommendations! Published in 2018 at "Acta Ecologica Sinica"
DOI: 10.5846/stxb201711142028
Abstract: 由于全球气候变化，预计未来我国亚热带地区干旱频率和持续时间将会增加。森林土壤CO2的释放是陆地生态系统碳循环的重要组成部分，然而，有关不同深度土壤CO2通量对干旱响应的理解仍相当有限。选择武夷山针叶林（Coniferous Forest，CF）和常绿阔叶林（Evergreen Broadleaved Forest，EBF）为研究对象，于2014年6月至2015年12月，采用梯度法计算10、30 cm和50 cm深度各层土壤CO2通量，探讨模拟干旱对其影响。结果表明：CF和EBF样地土壤CO2浓度均随土壤深度的增加而升高。CF和EBF样地对照（CK）处理10 cm深度土壤CO2生产量分别占总CO2生产量的53.5%和55.7%，表明土壤CO2生产量主要来源于浅层土壤，这可能与浅层土壤有高的有机碳含量及细根生物量主要分布区有关。干旱处理使CF和EBF样地不同深度土壤CO2通量均显著减少。在两个样地土壤CO2通量的温度敏感性（Q10）值均随着土壤深度的增加而减少。干旱处理显著减少了CF样地浅层土壤的Q10值（P=0.02），对深层土壤影响不显著（30 cm：P=0.30；50 cm：P=0.23）；而在EBF样地干旱处理显著减少了深层土壤的Q10值（30 cm：P=0.02；50 cm：P=0.01），对浅层土壤影响不显著（P=0.32）。 read more here.
Keywords: co2 ebf; co2; ebf co2; q10 ... See more keywords