Pyrolysis of wood to biochar: Increasing yield while maintaining microporosity

Enhancing biochar yield by co-pyrolysis of bio-oil with biomass: Impacts of potassium hydroxide addition and air pretreatment prior to co-pyrolysis

“…After pyrolysis of the biomass or co-pyrolysis of biomass with bio-oil, the values of surface area and total pore volume were $440 m 2 g À1 and $0.195 mL g À1 , respectively, with most of the porosity from micropores (Base cases, Table 3). The data suggest that recycling of the bio-oil to biomass for co-pyrolysis at the studied conditions does not deteriorate the porous properties of the biochar, as reported previously (Veksha et al, 2014).…”

“…Pyrolysis was carried out in a vertical down-flow packed bed reactor set-up described in detail elsewhere (Veksha et al, 2014). Briefly, the reactor consisted of a quartz tube surrounded by a furnace.…”

“…On the other hand, the low volatility of bio-oil makes it a good precursor for biochar production. In a recent study, bio-oil was successfully recycled to increase the biochar yield with no deterioration of the microporous structure and organic vapor uptake (1,1,1,2-tetrafluoroethane) of the produced biochar compared to the primary biochar from biomass (Veksha et al, 2014). Previously, Huang et al (2012) demonstrated that the proposed recycling approach is also advantageous in simultaneous refining of bio-oil.…”

The removal of methyl orange from aqueous solution by biochar and activated carbon under microwave irradiation and in the presence of hydrogen peroxide

“…Preparation of the carbons was carried out in a vertical down-flow packed bed reactor set-up described in [17]. For biochar preparation, approximately 7.5 g of the wood chips were crushed, dried at 105 C (particle diameter 0.3-2.0 mm and particle length 0.3-5.0 mm) and loaded into the reactor to form a bed with a volume of $35 mL.…”

Properties of biomass-derived biochars: Combined effects of operating conditions and biomass types

“…At the same time, there is a great concern with the environmental problems associated with greenhouse gas emissions and energy consumption during the biochar production (Roberts et al, 2010). Obtaining intended physicochemical properties while improving yield is highly desirable for biochar production (Manyà, 2012;Veksha et al, 2014). Consequently, efforts must be made to present optimized procedures for biochar production, which can be helpful in reaching a compromise between obtaining biochars with desired properties and reducing environmental costs with high yields and less energy consumption (Mukherjee et al, 2011;Manyà, 2012;Al-Wabel et al, 2013).…”