钢针加剧了微波维持的等离子体,加速了直接的H2S转化为H2
Baoxu Zhang1, Zhanlong Song1, Yingping Pang1
1National Engineering Laboratory for Reducing Emissions from Coal Combustion, Engineering Research Center of Environmental Thermal Technology of Ministry of Education, Shandong Key Laboratory of Energy Carbon Reduction and Resource Utilization, School of Energy and Power Engineering, Shandong University, Jinan 250061, China.
Journal of hazardous materials
|August 14, 2024
概括
使用微波等离子与针直接转化硫化 (H2S) 恢复和硫资源. 这种可持续的方法避免了的浪费,并提高了能源效率,以实现更清洁的生产.
科学领域:
- 等离子体化学和物理
- 可持续的化学工程 可持续的化学工程
- 催化和材料科学 材料科学
背景情况:
- 传统的硫化转化工艺,如克劳斯工艺,导致大量的废物.
- 硫化 (H2S) 的直接转化为恢复 (H) 和硫 (S) 资源提供了一个可持续的途径.
- 金属属性,最佳参数和增强机制在微波等离子体中对H2S转换的特定影响尚不清楚.
研究的目的:
- 为了研究金属尺寸对微波等离子体性能的影响,用于直接的H2S转换.
- 通过金属增强微波等离子策略来确定高效的H2S转换的最佳过程参数.
- 阐明微波等离子体在H2S分裂中用于和硫回收的增强机制.
主要方法:
- 试验优化针几何形状 (直径1毫米,长60毫米,尖角10°) 用于在多模式腔中强化微波放电.
- 理论计算和等离子体分布分析,以了解微波场合和电场增强.
- 在现场进行光学发射光谱,以识别在等离子体放电过程中产生的根物种 (S和H).
主要成果:
- 一个优化的针 (直径1毫米,长60毫米,尖角10°) 被实验验证为增强微波等离子放电.
- 在低微波功率 (300W) 实现了100%H2S的40.2%转化和10%H2S的90.1%转化为H2,稳定30小时.
- 确定了高能电子-H2S碰撞和随后的自由基反应作为H2S分裂成H2和S的主要机制.
结论:
- 优化的针显著增强了微波维持等离子体,使H2S的有效直接转化.
- 低功耗,高H2S度和大流量对于提高这一过程中的能源效率是有益的.
- 这种金属增强的微波等离子策略为从H2S中生产气提供了一种新的,可持续的,低碳的途径.
相关概念视频
01:19Inductively Coupled Plasma Atomic Emission Spectroscopy: Principle
556
Inductively coupled plasma (ICP) is the most widely used plasma source in atomic emission spectroscopy (AES), also known as Inductively Coupled Plasma Optical Emission Spectroscopy (ICP-OES). The ICP source, or torch, consists of three concentric quartz tubes with argon gas flowing through them. A spark from a Tesla coil initiates the ionization of argon, generating a high-temperature plasma.
The ions and electrons produced interact with the fluctuating magnetic field created by a water-cooled...
The ions and electrons produced interact with the fluctuating magnetic field created by a water-cooled...
556
01:20Atomic Emission Spectroscopy: Overview
1.7K
Atomic emission spectroscopy (AES) is an analytical technique used to determine the elemental composition of a sample by analyzing the light emitted from excited atoms. In AES, atoms in a sample are excited to higher energy levels by thermal energy from high-temperature sources, such as plasma, arcs, or sparks. When these excited atoms return to lower energy states, they emit light at specific wavelengths characteristic of each element. The resulting atomic emission spectrum, which consists of...
1.7K
02:45Nuclear Fusion
18.7K
The process of converting very light nuclei into heavier nuclei is also accompanied by the conversion of mass into large amounts of energy, a process called fusion. The principal source of energy in the sun is a net fusion reaction in which four hydrogen nuclei fuse and ultimately produce one helium nucleus and two positrons.
A helium nucleus has a mass that is 0.7% less than that of four hydrogen nuclei; this lost mass is converted into energy during the fusion. This reaction produces about...
A helium nucleus has a mass that is 0.7% less than that of four hydrogen nuclei; this lost mass is converted into energy during the fusion. This reaction produces about...
18.7K
03:20Nuclear Transmutation
17.5K
Nuclear transmutation is the conversion of one nuclide into another. It can occur by the radioactive decay of a nucleus, or the reaction of a nucleus with another particle. The first manmade nucleus was produced in Ernest Rutherford’s laboratory in 1919 by a transmutation reaction, the bombardment of one type of nuclei with other nuclei or with neutrons. Rutherford bombarded nitrogen-14 atoms with high-speed α particles from a natural radioactive isotope of radium and observed...
17.5K