Optimization of low-temperature pyrolysis process equipped with a two-stage non-flame oxidation system for the treatment uranium-bearing spent TBP

2015 ◽  
Vol 94 ◽  
pp. 11-19 ◽  
Author(s):  
Hee-Chul Yang ◽  
Min-Woo Lee ◽  
Jei-Kwon Moon ◽  
Dong-Yong Chung
Keyword(s):  
Low Temperature ◽  
Pyrolysis Process ◽  
Two Stage ◽  
Low Temperature Pyrolysis ◽  
Flame Oxidation ◽  
Oxidation System

scholarly journals Chlorine Behavior During Low-Temperature Pyrolysis Process at the First Stage of the Two-Stage Fluidized-Bed Waste Incinerator

2004 ◽  
Vol 83 (2) ◽  
pp. 137-148 ◽  
Author(s):  
Hidetoshi YAMAMOTO ◽  
Masamichi ASANO ◽  
Tatsuya IKEDA ◽  
Tomomasa TAGUCHI ◽  
Takao HARA
Keyword(s):  
Low Temperature ◽  
Fluidized Bed ◽  
Waste Incinerator ◽  
Pyrolysis Process ◽  
Two Stage ◽  
Low Temperature Pyrolysis

scholarly journals Low-Temperature Pyrolysis of Municipal Solid Waste Components and Refuse-Derived Fuel—Process Efficiency and Fuel Properties of Carbonized Solid Fuel

Data ◽  
2020 ◽  
Vol 5 (2) ◽  
pp. 48 ◽  
Author(s):  
Kacper Świechowski ◽  
Ewa Syguła ◽  
Jacek A. Koziel ◽  
Paweł Stępień ◽  
Szymon Kugler ◽  
...  
Keyword(s):  
Low Temperature ◽  
Municipal Solid Waste ◽  
Solid Waste ◽  
Solid Fuel ◽  
Organic Waste ◽  
Calorific Value ◽  
Fuel Properties ◽  
Process Efficiency ◽  
Pyrolysis Process ◽  
Low Temperature Pyrolysis

New technologies to valorize refuse-derived fuels (RDFs) will be required in the near future due to emerging trends of (1) the cement industry’s demands for high-quality alternative fuels and (2) the decreasing calorific value of the fuels derived from municipal solid waste (MSW) and currently used in cement/incineration plants. Low-temperature pyrolysis can increase the calorific value of processed material, leading to the production of value-added carbonized solid fuel (CSF). This dataset summarizes the key properties of MSW-derived CSF. Pyrolysis experiments were completed using eight types of organic waste and their two RDF mixtures. Organic waste represented common morphological groups of MSW, i.e., cartons, fabrics, kitchen waste, paper, plastic, rubber, PAP/AL/PE composite packaging (multi-material packaging also known as Tetra Pak cartons), and wood. The pyrolysis was conducted at temperatures ranging from 300 to 500 °C (20 °C intervals), with a retention (process) time of 20 to 60 min (20 min intervals). The mass yield, energy densification ratio, and energy yield were determined to characterize the pyrolysis process efficiency. The raw materials and produced CSF were tested with proximate analyses (moisture content, organic matter content, ash content, and combustible part content) and with ultimate analyses (elemental composition C, H, N, S) and high heating value (HHV). Additionally, differential scanning calorimetry (DSC) and thermogravimetric analyses (TGA) of the pyrolysis process were performed. The dataset documents the changes in fuel properties of RDF resulting from low-temperature pyrolysis as a function of the pyrolysis conditions and feedstock type. The greatest HHV improvements were observed for fabrics (up to 65%), PAP/AL/PE composite packaging (up to 56%), and wood (up to 46%).

Chemical yields from low-temperature pyrolysis of CCA-treated wood

2009 ◽  
Author(s):  
Qirong Fu ◽  
Dimitris Argyropolous ◽  
Lucian Lucia ◽  
David Tilotta ◽  
Stan Lebow
Keyword(s):  
Low Temperature ◽  
Treated Wood ◽  
Low Temperature Pyrolysis

Preparation of Organic/Inorganic Membrane by PDMS Low-temperature Pyrolysis

2014 ◽  
Vol 29 (2) ◽  
pp. 137-142
Author(s):  
Jiao-Zhu YU ◽  
Lin LI ◽  
Xin JIN ◽  
Ling-Hua DING ◽  
Tong-Hua WANG
Keyword(s):  
Low Temperature ◽  
Inorganic Membrane ◽  
Low Temperature Pyrolysis

scholarly journals Effects of Double-Ageing Heat Treatments on the Microstructure and Mechanical Behaviour of a Ti-3.5Al-5Mo-4V Alloy

Materials ◽  
2021 ◽  
Vol 14 (1) ◽  
pp. 209
Author(s):  
Xuanming Ji ◽  
Panpan Ge ◽  
Song Xiang ◽  
Yuanbiao Tan
Keyword(s):  
Electron Microscopy ◽  
High Temperature ◽  
Low Temperature ◽  
Mechanical Behaviour ◽  
Ageing Time ◽  
Two Stage ◽  
Ageing Treatment ◽  
Ω Phase ◽  
Α Phase ◽  
Temperature Ageing

In this work, the effect of double-ageing heat treatments on the microstructural evolution and mechanical behaviour of a metastable β-titanium Ti-3.5Al-5Mo-4V alloy is investigated by X-ray diffraction (XRD), scanning electron microscopy (SEM) and transmission electron microscopy (TEM). The double-ageing treatments are composed of low-temperature pre-ageing and high-temperature ageing, where the low-temperature pre-ageing is conducted at 300 °C or 350 °C for different times, and the high-temperature ageing is conducted at 500 °C for 8 h. The results show that the phase transformation sequence is altered with the time spent during the first ageing stage, the isothermal ω phase is precipitated in the pre-ageing process of the alloy at 300 °C and 350 °C with the change in the ageing time, and the ω phase is finally transformed into the α phase with the extension of pre-ageing time. The existence time of the ω phase is shortened as the pre-ageing temperature increases. The microhardness of the alloy increases with increasing pre-ageing time and temperature. Compared with single-stage ageing, the ω phase formed in the pre-ageing stage changes the response to subsequent high-temperature ageing. After the two-stage ageing treatment, the precipitation size of the α phase is obviously refined after the double-ageing treatment. A microhardness test shows that the microhardness of the two-stage aged alloy increases with extended pre-ageing time.

scholarly journals High- and low-temperature pyrolysis profiles describe volatile organic compound emissions from western US wildfire fuels

2018 ◽  
Author(s):  
Kanako Sekimoto ◽  
Abigail R. Koss ◽  
Jessica B. Gilman ◽  
Vanessa Selimovic ◽  
Matthew M. Coggon ◽  
...  
Keyword(s):  
High Temperature ◽  
Low Temperature ◽  
Biomass Burning ◽  
Ponderosa Pine ◽  
Fine Particles ◽  
Voc Emissions ◽  
Western Us ◽  
Volatile Organic ◽  
Low Temperature Pyrolysis ◽  
Pyrolysis Processes

Abstract. Biomass burning is a large source of volatile organic compounds (VOCs) and many other trace species to the atmosphere, which can act as precursors to the formation of secondary pollutants such as ozone and fine particles. Measurements collected with a proton-transfer-reaction time-of-flight mass spectrometer during the FIREX 2016 laboratory intensive were analyzed with Positive Matrix Factorization (PMF), in order to understand the instantaneous variability in VOC emissions from biomass burning, and to simplify the description of these types of emissions. Despite the complexity and variability of emissions, we found that a solution including just two emission profiles, which are mass spectral representations of the relative abundances of emitted VOCs, explained on average 85 % of the VOC emissions across various fuels representative of the western US (including various coniferous and chaparral fuels). In addition, the profiles were remarkably similar across almost all of the fuel types tested. For example, the correlation coefficient r of each profile between Ponderosa pine (coniferous tree) and Manzanita (chaparral) is higher than 0.9. We identified the two VOC profiles as resulting from high-temperature and low-temperature pyrolysis processes known to form VOCs in biomass burning. High-temperature and low-temperature pyrolysis processes do not correspond exactly to the commonly used flaming and smoldering categories as described by modified combustion efficiency (MCE). The average atmospheric properties (e.g. OH reactivity, volatility, etc.) of the high- and low-temperature profiles are significantly different. We also found that the two VOC profiles can describe previously reported VOC data for laboratory and field burns. This indicates that the high- and low-temperature pyrolysis profiles could be widely useful to model VOC emissions from many types of biomass burning in the western US, with a few exceptions such as burns of duff and rotten wood.

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