proximate analysis

简明释义

近似分析;工业分析

英英释义

例句

1.The laboratory conducted a proximate analysis to determine the moisture content of the coal sample.

实验室进行了近似分析以确定煤样的水分含量。

2.The environmental impact assessment included a proximate analysis of the waste materials.

环境影响评估包括对废弃物的近似分析。

3.Before starting the fermentation process, a proximate analysis of the substrate was performed.

在开始发酵过程之前，进行了基质的近似分析。

4.In food science, proximate analysis is essential for understanding the nutritional composition of a product.

在食品科学中，近似分析对理解产品的营养成分至关重要。

5.The results of the proximate analysis indicated a high level of protein in the feed.

该近似分析的结果表明饲料中蛋白质含量很高。

作文

In various fields of science and engineering, understanding the composition of materials is crucial for quality control and performance evaluation. One method that has gained significant importance is proximate analysis, which refers to a series of tests conducted to determine the basic components of a substance, particularly in the context of fuels and organic materials. This analytical technique provides essential information about the moisture content, volatile matter, ash content, and fixed carbon of a sample. Each of these components plays a vital role in assessing the material's characteristics and its suitability for specific applications.The first component measured in proximate analysis is moisture content. Moisture can significantly affect the energy value and combustion efficiency of fuels. For instance, in coal analysis, higher moisture levels can lead to reduced heating value, making the fuel less efficient. Therefore, knowing the moisture content helps in evaluating how the fuel will perform when burned.Next, the volatile matter is measured. This component represents the portion of the material that can be vaporized at elevated temperatures. It includes gases and vapors released during combustion, which can influence the ignition and flame characteristics of the fuel. A higher volatile matter content often indicates a more reactive fuel, which can be advantageous in certain applications but may also lead to increased emissions if not managed properly.The third aspect of proximate analysis is the determination of ash content. Ash is the inorganic residue remaining after combustion, and it can affect the efficiency of energy conversion processes. High ash content can lead to operational issues such as slagging and fouling in boilers, which can decrease efficiency and increase maintenance costs. Therefore, understanding the ash content is essential for optimizing fuel use and ensuring the longevity of equipment.Finally, fixed carbon is the residual carbon content that remains after the volatile matter has been expelled. It represents the solid carbon that contributes to the energy content of the fuel. In many cases, a higher fixed carbon ratio correlates with a higher heating value, making it a desirable characteristic in fuels used for power generation.Overall, proximate analysis serves as a foundational tool in the field of material science, particularly in the energy sector. By providing a clear picture of a material's composition, it enables engineers and scientists to make informed decisions regarding fuel selection, processing methods, and environmental impact assessments. In addition, this analysis can also aid in research and development efforts aimed at creating more efficient and sustainable energy sources.In conclusion, the significance of proximate analysis cannot be overstated. It not only informs us about the fundamental properties of materials but also guides practical applications in industry. As we continue to seek improved energy solutions and environmental sustainability, mastering techniques like proximate analysis will remain essential for advancing our understanding and utilization of various materials in the modern world.

在科学和工程的各个领域，理解材料的成分对于质量控制和性能评估至关重要。一种日益重要的方法是近似分析，它指的是一系列测试，用于确定物质的基本组成，特别是在燃料和有机材料的背景下。这种分析技术提供了关于样品中的水分含量、挥发性物质、灰分含量和固定碳的重要信息。这些成分在评估材料特性及其适用性方面发挥着重要作用。在近似分析中测量的第一个成分是水分含量。水分会显著影响燃料的能量值和燃烧效率。例如，在煤的分析中，较高的水分含量可能导致热值降低，使燃料效率降低。因此，了解水分含量有助于评估燃料在燃烧时的表现。接下来，测量挥发性物质。该成分表示在高温下可以气化的材料部分。它包括燃烧过程中释放的气体和蒸汽，这可能影响燃料的点火和火焰特性。较高的挥发性物质含量通常表示更具反应性的燃料，这在某些应用中可能是有利的，但如果管理不当，也可能导致排放增加。近似分析的第三个方面是灰分含量的确定。灰分是燃烧后留下的无机残留物，它会影响能量转换过程的效率。高灰分含量可能导致锅炉中出现如熔渣和污垢等操作问题，从而降低效率并增加维护成本。因此，了解灰分含量对于优化燃料使用和确保设备的耐用性至关重要。最后，固定碳是挥发性物质排出后剩余的碳含量。它代表了对燃料能量含量有贡献的固体碳。在许多情况下，较高的固定碳比率与较高的热值相关联，使其成为发电用燃料的理想特性。总的来说，近似分析在材料科学领域，尤其是在能源行业中，作为基础工具发挥着重要作用。通过提供材料组成的清晰图像，它使工程师和科学家能够就燃料选择、加工方法和环境影响评估做出明智的决策。此外，这种分析还可以帮助研究和开发旨在创造更高效和可持续的能源来源的工作。总之，近似分析的重要性不容低估。它不仅告知我们材料的基本属性，还指导工业中的实际应用。随着我们继续寻求改善能源解决方案和环境可持续性，掌握如近似分析等技术将仍然对推动我们对现代世界各种材料的理解和利用至关重要。