使用缓慢的热解工艺和参数效应将废纸和废纸转化为生物炭
Tayachew Nega1, Kirubeil Awoke1, Ashenafi Tesfaye Bicks1
1Department of Mechanical Engineering, Institute of Technology, University of Gondar, Ethiopia.
Heliyon
|July 24, 2023
概括
这项研究在167°C的缓慢热解和废纸发现,生物炭产量主要受温度和空气流速的控制. 较高的空气流和温度通常会降低生物炭的产量.
科学领域:
- 生物质转换生物质转换
- 热解技术的技术.
- 废弃物价值化 废弃物价值化 废弃物价值化
背景情况:
- 慢热解是一种关键的热化学过程,用于将生物质转化为有价值的产品,如生物炭.
- 优化热解条件对于从各种原料中最大限度地提高生物炭产量和质量至关重要.
- 牛皮和废纸是未充分利用的原料,具有产生生物炭的潜力.
研究的目的:
- 为了研究温度,空气流速,加热速度和停留时间对使用慢热解来研究和废纸生物炭产量的影响.
- 确定最佳的过程参数,以最大限度地从这些特定原料中生产生物炭.
- 了解分解动态及其对生物炭形成的影响.
主要方法:
- 实验室规模的慢热解实验是在167°C的受控温度下进行的.
- 含有15%水分的原料 (废纸和废纸) 在不同的空气质量流速 (0.35-1.5公斤/秒) 下进行处理.
- 量化了生物炭产量,并分析了过程参数 (如空气流和温度) 对分解和产量的影响.
主要成果:
- 生物炭产量受到应用温度和空气流速的显著影响,较高的速度通常导致产量下降.
- 在167°C和0.35米/秒的空气流量下,30公斤的原料产生了10-23公斤的生物炭和10-20公斤的废纸.
- 增加空气流速造成了温度梯度,同时打开空气入口增加了温度,减少了生物炭输出.
结论:
- 缓慢热解纸和废纸的生物炭产量主要取决于温度和空气流速.
- 优化空气流管理对于控制温度和最大限度地提高生物炭生产至关重要.
- 进一步的研究可以探索更高的温度和不同的原料比率,以提高生物炭的产生.
相关概念视频
00:46Bioremediation
Bioremediation is the use of prokaryotes, fungi, or plants to remove pollutants from the environment. This process has been used to remove harmful toxins in groundwater as a byproduct of agricultural run-off and also to clean up oil spills.
01:25Production of Organic Acids
Lactic acid, an important organic acid extensively applied in food, pharmaceutical, and biodegradable polymer industries, is primarily produced via microbial fermentation. This method is favored over chemical synthesis due to its environmental sustainability and capacity for enantiomerically pure product formation. Among various microbial processes, the fermentation of starch-based substrates stands out due to the abundance and renewability of raw materials like corn and potatoes.Hydrolysis of...
01:27Bioplastics
Bioplastics derived from microbial processes present a sustainable alternative to conventional petroleum-based plastics. Among these, polyhydroxyalkanoates (PHAs), particularly polyhydroxybutyrates (PHBs), have emerged as prominent candidates due to their biodegradability and biocompatibility. These polymers are synthesized by a variety of bacteria, such as Cupriavidus necator and Pseudomonas putida, which naturally accumulate PHAs as intracellular carbon and energy reserves, especially under...
01:30Biological Treatment of Effluent and Waste Water
Biological wastewater treatment relies on the metabolic activity of microorganisms to remove pollutants from sewage. In modern treatment systems, this process is organized into sequential stages that progressively reduce solid material, dissolved organic matter, and microbial contamination. Each stage plays a distinct role in improving water quality and preparing the effluent for safe discharge or reuse.Primary and Secondary TreatmentPrimary treatment is a physical process that removes large...