Effects of Temperature and Heating Rate on the Characteristics of Molded Bio-char

Abstract

A slow pyrolysis of pinewood was investigated in this paper. Through the briquette process, the pinewood sawdust becomes molded biomass. The molded bio-char was produced from molded biomass with different pyrolysis factors, and the bio-char's heating value, char yield rates, and physicochemical and morphological properties were investigated. Molded bio-char's characteristics depended principally on pyrolysis factors. At low temperature (400 °C), the char yield rate was positively correlated to the heating rate. But at higher temperatures (500 to 700 °C), the char yield rates decreased as heating rates increased. As pyrolysis temperature increased from 400 to 700 °C, the following increased in molded bio-char: fixed-carbon content, percentage carbon, heating value, ash content, as well as surface areas. And its pore structure, graphite degree, and polymerization degree achieved a higher level. Compared with pulverized bio-char, the molded bio-char had a higher char yield rate, ash content, graphite degree, and structure ordering. The molded bio-char obtained from a low temperature (400 °C) and high heating rate (15 °C/min) can be used as a reducing agent, the molded bio-char from 600 °C is recommend as an activated carbon precursor, and the molded bio-chars from low temperature (400 °C) have a higher efficiency as fuel.

Biochar produced from Amazonian agro-industrial wastes: properties and adsorbent potential of Cd2+ and Cu2+

“…The same trend of higher lignin content resulting in higher biochar yield was also observed by other researchers when comparing olive husk with corncob (Demirbas 2004). Furthermore, for this temperature range, the obtained yields are compared to those of other studies using pine sawdust (Li et al 2016), conocarpus wastes (Al-Wabel et al 2013) and switchgrass (Imam and Capareda 2012). From an economical and practical viewpoint, higher yield during biochar production might be better.…”

Supercritical Water Gasification of Guaiacol with Acetic Acid as a Radical Scavenger: Interaction Effect on Char Formation and Gas Composition

“…Char and tar were assumed to comprise only carbon. 24 , 25 It should be noted that the carbon yield of gas is the CGE.…”

Comparison of Surface and Structural Properties of Carbonaceous Materials Prepared by Chemical Activation of Tomato Paste Waste: The Effects of Activator Type and Impregnation Ratio

“…Heating rate and contact time are two important parameters in the activated carbon production. There are various applications of these parameters in the literature: (i) heating rate applied as 2, 5, 10, 15, and 30 ∘ C/min and (ii) activation time utilized as 15, 30, 45, 60, 120, and 240 min [17][18][19][20][21][22][23][24][25][26]. In the light of the above information, the raw material was heated in a muffle furnace at a rate of 15 ∘ C/min from room temperature to 500 ∘ C and maintained at this temperature for 1 h under static atmosphere to obtain carbonized material (CTW).…”

“…On these bases, tomato waste is considered to be good lignocellulosic material and inexpensive source alternative to more expensive and polluting precursors such as coal. Therefore, the objective of this study is to investigate the structure of raw material and carbons which were obtained by carbonization of tomato paste waste and chemical activation of chars with different impregnation ratios (25,50, and 100% wt.) of HCl, K 2 CO 3 , and KOH.…”