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双碳战略是国家重大战略,也是推动国家经济高质量可持续发展的必由之路。我国碳达峰到碳中和时间短、任务重。我国化工冶金每年碳排放约36亿t,约占全国工业碳排放量的36%,此外化工冶金废气、固废、废热产生量大、堆存量多、难利用、循环利用率低。发展化工冶金低碳化转型和变革,是我国工业领域双碳目标实现的根本保证。我国化工冶金历时百年,已发展成熟,仅通过原料燃料替代及绿色工艺转型减碳容量有限,亟需开展化工冶金跨行业耦合与循环利用技术变革,深入推动工业领域减碳。我国化工冶金大多是孤立、非循环连续工艺过程,引起跨行业耦合难、循环利用难度大的问题。针对上述问题,首先分析了化工冶金行业碳排放治理现状及国家战略需求;其次,提出了废气与废热耦合热化学转化制高质气体、废气与废气耦合定向催化制高端化学品、废气与固废耦合制低碳材料3个减碳增效策略。结合其技术发展现状和趋势,提出了拟重点发展的化工冶金跨行业耦合二氧化碳循环利用技术,以期为工业低碳绿色发展提供支撑。 相似文献
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To explore the ideal architecture of Pt-Co bimetallic catalyst for aromatics saturation, various Pt-Co bimetallic catalysts were synthesized via the galvanic replacement, the co-impregnation, and the sequential impregnation methods, and were characterized by CO chemisorption, transmission electron microscopy(TEM), H_2-temperature-programmed reduction(H_2-TPR), H_2-temperature-programmed desorption(H_2-TPD), X-ray fluorescence(XRF) spectrometry, and inductively coupled plasma atomic emission spectroscopy(ICP-AES), while the catalysts were evaluated by the flow reactor study of toluene hydrogenation. These characterization results suggest that the surface decoration of Pt has little influence on the number of active sites located on the surfaces of the reduced Co-based catalysts, but can greatly suppress the oxidation of Co at room temperature and provide the activated hydrogen at a relatively low temperature. It is demonstrated that their chemical properties and catalytic performance are largely dependent on the location of Pt atoms in the bimetallic catalysts. The architecture of Pt-Co bimetallic catalyst consisting of Co/SiO_2 decorated with 0.3% of Pt, with the most of Pt atoms being situated on the surfaces of Co nanoparticles, is the active structure for aromatic saturation and has the maximum utilization of Pt. 相似文献
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为求解射表编拟中弹道计算所需的弹丸空气动力系数,采用有限容积法求解N-S方程、S-A湍流模型并考虑具体边界条件,借助FLUENT模拟弹丸外流场.对某型榴弹实现了流场模拟,得到了攻角为0°、4°、8°和马赫数为0.6~2.1时的弹丸阻力系数、升力系数、俯仰力矩系数.通过该弹气动力系数数值模拟计算值与雷达数据提取值、工程计算值、纸靶试验值进行比较,表明数值模拟得到的曲线规律较好.在此基础上,采用阻力、升力符合系数修正方法,实现了数值结果在射表编拟中的应用,且精度满足射表编拟等弹道计算应用的需要. 相似文献
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将蒜黄根中提取的总膳食纤维(total dietary ifber,TDF)添加于低脂乳化肠,探究蒜黄根TDF对低脂乳化肠品质的影响.以正常脂肪添加量为对照组,实验组减少15%(以降低脂肪含量前瘦肉与猪背膘的总质量为基准)脂肪后分别添加不同质量的蒜黄根TDF(1.25%、2.50%、3.75%、5.00%、6.25%,... 相似文献
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