scholarly journals Biochar from Microwave Pyrolysis of Artemisia Slengensis: Characterization and Methylene Blue Adsorption Capacity

2019 ◽  
Vol 9 (9) ◽  
pp. 1813 ◽  
Author(s):  
Xuhui Li ◽  
Kunquan Li ◽  
Chunlei Geng ◽  
Hamed El Mashad ◽  
Hua Li ◽  
...  
Keyword(s):  
Heating Rate ◽  
Pyrolysis Temperature ◽  
Metal Chloride ◽  
Holding Time ◽  
Optimal Conditions ◽  
Heating Rates ◽  
Microwave Pyrolysis ◽  
Metal Carbonate ◽  
Orthogonal Experiments ◽  
Temperature Heating

In this research, artemisia selengensis was used to produce biochar via microwave pyrolysis. The influence of pyrolysis temperature, heating rates, temperature holding time and additive on the biochar yield and adsorbability were all investigated. The results suggest that the biochar yield decreased with the increase of pyrolysis temperature while the adsorbability of the biochar increased with an increase of the pyrolysis temperature; the biochar yield and its adsorbability could achieve the desired value when the heating rate and temperature holding time were in a specific scope; the biochar yield decreased when an additive was added; the adsorbability of the biochar could be increased by adding ZnCl2 (metal chloride) and Na2CO3 (metal carbonate). According to the orthogonal experiments, the optimal conditions for biochar production were: pyrolysis temperature 550 °C, heating rate 2 °C/s, temperature holding time 15 min, without additive.

scholarly journals Optimization of Sintering Process of Alumina Ceramics Using Response Surface Methodology

2021 ◽  
Vol 13 (12) ◽  
pp. 6739
Author(s):  
Darko Landek ◽  
Lidija Ćurković ◽  
Ivana Gabelica ◽  
Mihone Kerolli Mustafa ◽  
Irena Žmak
Keyword(s):  
Response Surface Methodology ◽  
Response Surface ◽  
Heating Rate ◽  
Sintering Temperature ◽  
Nonlinear Models ◽  
Slip Casting ◽  
Holding Time ◽  
Alumina Ceramics ◽  
Aqueous Suspensions ◽  
Temperature Heating

In this work, alumina (Al2O3) ceramics were prepared using an environmentally friendly slip casting method. To this end, highly concentrated (70 wt.%) aqueous suspensions of alumina (Al2O3) were prepared with different amounts of the ammonium salt of a polycarboxylic acid, Dolapix CE 64, as an electrosteric dispersant. The stability of highly concentrated Al2O3 aqueous suspensions was monitored by viscosity measurements. Green bodies (ceramics before sintering) were obtained by pouring the stable Al2O3 aqueous suspensions into dry porous plaster molds. The obtained Al2O3 ceramic green bodies were sintered in the electric furnace. Analysis of the effect of three sintering parameters (sintering temperature, heating rate and holding time) on the density of alumina ceramics was performed using the response surface methodology (RSM), based on experimental data obtained according to Box–Behnken experimental design, using the software Design-Expert. From the statistical analysis, linear and nonlinear models with added first-order interaction were developed for prediction and optimization of density-dependent variables: sintering temperature, heating rate and holding time.

scholarly journals Dilation of Ti-6Al-4V/HA Composite Tensile Parts

2002 ◽  
Vol 11 (2) ◽  
pp. 096369350201100
Author(s):  
E. S. Thian ◽  
N. H. Loh ◽  
K. A. Khor ◽  
S. B. Tor
Keyword(s):  
Heating Rate ◽  
Sintering Temperature ◽  
Holding Time ◽  
Test Results ◽  
Basic Information ◽  
Sintering Process ◽  
Densification Rate ◽  
In Situ Test ◽  
Temperature Heating

Prior to the actual sintering process, a dilatometry study is performed to provide basic information and guidelines. This paper studies the effects of three sintering factors: sintering temperature, heating rate and holding time, on the densification rate of Ti-6Al-4V/HA composite parts. According to the in-situ test results, suitable values for the sintering factors can then be established.

Pyrolysis of Imperata cylindrica with Varies Parameters and its Characterization

2015 ◽  
Vol 754-755 ◽  
pp. 1007-1011 ◽  
Author(s):  
M.H. Fatin ◽  
N.Z. Noriman ◽  
M.Z. Salihin ◽  
N.R. Munirah ◽  
Mohd Firdaus Omar
Keyword(s):  
Heating Rate ◽  
Pyrolysis Temperature ◽  
Imperata Cylindrica ◽  
Operational Parameters ◽  
Carbon Yield ◽  
Invasive Weed ◽  
X Ray ◽  
Higher Temperature ◽  
Pyrolysis Experiment ◽  
Temperature Heating

This study was undertaken to characterize pyrolysis of novel biobased invasive weed from ImperataCylindrica. The effects of various temperatures on the pyrolysis stages were characterised. Different operational parameters such as pyrolysis temperature, heating rate temperature are studied. Pyrolysis experiment of groud ImperataCylindrica was performed at temperature 350°C, 550°C and 750°C, and particle size of 0-125μm and heating rate of 5°C/min and 15°C/min. The synthesis carbonaceous was characterized by Fourier Transform Infrared Spectroscopy (FTIR), and different physical properties such as carbon yield, Carbon Hydrogen Nitrogen (CHN analysis), and X-Ray Fluorescence (XRF) was determined. It is observable that pyrolysis at the 15°C / min with 750°C shows that higher temperature produced a higher carbon yield and higher carbon content.

scholarly journals Oily Sludge Recovery using Microwave Pyrolysis Technique

2021 ◽  
Vol 37 (1) ◽  
pp. 40-45
Author(s):  
Khamael M. Abualnaja ◽  
Hala M. Abo-Dief ◽  
Ola A. Abu Ali ◽  
Abdullah Al-Anazi ◽  
Ashraf T. Mohamed
Keyword(s):  
Heating Rate ◽  
Oil Recovery ◽  
Calorific Value ◽  
Oily Sludge ◽  
Pyrolysis Oil ◽  
Nitrogen Flow Rate ◽  
Microwave Pyrolysis ◽  
Pyrolysis Oils ◽  
Temperature Heating ◽  
Pyrolysis Gases

The oily sludge treatments catch widespread attention. But, management of sludge is difficult and costly undertaking. The oil recovery pyrolysis temperature, heating rate and carbon wt.% is discussed. The recovered aliphatic, aromatic, elemental components and gases were obtained with respect to the nitrogen flow rate. The present work showed that as the heating rate increases, both the %pyrolysis oil and gases increases up to 600 OC, while the %pyrolysis char decreases. Beyond 600 OC, the pyrolysis gases% increases, the pyrolysis oil% decreases while the %pyrolysis char continuous decreases. Gas chromatography, and calorific value used to examine the hydrocarbon compositions of the virgin, sludge, and pyrolysis oils.

scholarly journals The effect of heating factors on the properties of heat-induced surimi gel under ohmic heating

2021 ◽  
Vol 13 (2) ◽  
pp. 32-42
Author(s):  
Van Nguyen
Keyword(s):  
Electrical Conductivity ◽  
Heating Rate ◽  
Salt Concentration ◽  
Ohmic Heating ◽  
Heating Time ◽  
Holding Time ◽  
Water Bath ◽  
Heating Rates ◽  
Fast Heating ◽  
Water Bath Heating

Ohmic heating (OH) is a method that heat is generated within the food due to its electrical resistance, resulting in a relatively linear heating rate and uniform temperature distribution. Because surimi-based paste contains water and salts, the conductivity is sufficiently good for the ohmic effect. Gelation induced by OH greatly depends on heating conditions such as heating speed, heating time, or electrical conductivity. However, the detailed information obtained is quite limited. Therefore, in order to clarify how ohmic heating affects the physical properties of surimi gel under OH, gels from croaker surimi (SA grade) were obtained using different heating conditions (heating speed, heating time, or salt concentration - electrical conductivity). Furthermore, the gels heated by ohmic heating were compared with the gel obtained by conventional water-bath heating. The results showed that, at the same heating rates, higher salt concentration generated better surimi gels for croaker surimi. Gels cooked ohmically at a slow heating rate performed significantly better than those cooked at a fast heating rate or heated conventionally in a water bath. There was little discernible difference in protein pattern between gels heated by OH and conventional water bath heating at fast heating rates with two different salt concentrations. The results also indicated that holding time at target temperature showed no effect on the gel. These results suggested that the properties of heat-induced surimi gels by OH are affected by not only heating speed but also holding time at maximum temperature and salt content.

Effect of pyrolysis temperature, heating rate, and residence time on rapeseed stem derived biochar

2018 ◽  
Vol 174 ◽  
pp. 977-987 ◽  
Author(s):  
Bin Zhao ◽  
David O'Connor ◽  
Junli Zhang ◽  
Tianyue Peng ◽  
Zhengtao Shen ◽  
...  
Keyword(s):  
Heating Rate ◽  
Residence Time ◽  
Pyrolysis Temperature ◽  
Temperature Heating

Optimization of Biomass Vacuum Pyrolysis Process Based on GRNN

2013 ◽  
Vol 411-414 ◽  
pp. 3016-3022 ◽  
Author(s):  
Xiao Hua Li ◽  
Yong Sheng Fan ◽  
Yi Xi Cai ◽  
Wei Dong Zhao ◽  
Hai Yun Yin
Keyword(s):  
Heating Rate ◽  
Prediction Models ◽  
Pyrolysis Temperature ◽  
Holding Time ◽  
Raw Material ◽  
Energy Transformation ◽  
Transformation Ratio ◽  
Vacuum Pyrolysis ◽  
System Pressure ◽  
Bio Oil

Biomass pyrolysis for preparing bio-oil was studied on the vacuum pyrolysis system, where rape straw was chosen as the raw material. The experiment was designed by orthogonal method. And pyrolysis temperature, system pressure, heating rate and holding time were chosen as input variables to establish the prediction models about bio-oil yields and energy transformation ratio based on Generalized Regression Neural Network. The parameters of vacuum pyrolysis system were optimized for maximizing bio-oil yields and energy transformation ratio, and the optimization result was verified by experiment. The results of research show that the predicted values are fit well with the experimental values, which verifies the effectiveness of the prediction models. When pyrolysis temperature is 486.8°C, system pressure is 5.0kPa, heating rate is 18.1°C/min and holding time is 55.0min, bio-oil yield is 43.6% and energy transformation ratio is 35.5%. Both are close to the maximum, and the result is accurate by experimental verification.

The Effects of Temperature and Heating Rate on the Preparation of Stalk Char

2012 ◽  
Vol 496 ◽  
pp. 88-93
Author(s):  
Jian Pan ◽  
Lin Wang
Keyword(s):  
Heating Rate ◽  
Pyrolysis Temperature ◽  
Calorific Value ◽  
Product Yield ◽  
Proximate Analysis ◽  
High Yield ◽  
Heating Rates ◽  
Fixed Carbon ◽  
Experimental Parameters ◽  
Effects Of Temperature

The pyrolysis of three stalk was studied to estimate the effect of pyrolysis conditions on product yield, calorific value and proximate analysis. Heating rate and pyrolysis temperature were the main experimental parameters. According to the test, when the heating rates were at 5, 10 and 15°C/min, the low heating rate reacted more thoroughly, got high yield and kept more energy. As the pyrolysis temperature rising; namely 200,300,400 and 500°C;the fixed carbon and gross calorific value were increasing to be 68% and 24.72 MJ/Kg respectively, but the yield was decreasing.

Sign in / Sign up

Export Citation Format

Share Document