Effect of pyrolysis temperature and correlation analysis on the yield and physicochemical properties of crop residue biochar

Zhang, Xiaoxiao; Zhang, Peizhen; Yuan, Xiangru; Li, Yanfei; Han, Lujia

doi:10.1016/j.biortech.2019.122318

Cited by 245 publications

(97 citation statements)

References 50 publications

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“…In our study, biochar improved plant growth by increasing the NUE, microbial growth, and water-holding capacity in the soil, as noticed in previous studies [48,49]. However, biochar feedstocks, pyrolysis temperature, and application rates played a significant role in the yield of the crop [50,51]. Biochar application affects various factors such as soil physiochemical properties, microbial growth, and nutrients biogeochemical cycles, especially C and N cycles in soil [52].…”

Section: Effect Of Organic Amendments On Nutritional Status Of Maizesupporting

confidence: 83%

Efficiency of Wheat Straw Biochar in Combination with Compost and Biogas Slurry for Enhancing Nutritional Status and Productivity of Soil and Plant

Abbas

Naveed

Azeem

et al. 2020

Plants

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In the present study, we investigated the impact of different combinations of wheat straw biochar, compost and biogas slurry on maize growth, physiology, and nutritional status in less productive soils. The experiment was performed as a completely randomized block design in a greenhouse pot experiment. The compost and biogas slurry were applied with and without biochar. The results revealed that a combination of biochar, compost, and biogas slurry enhanced the cation exchange capacity (31%), carbon (83%), phosphorus (67%) and potassium (81%) contents in the soil. Likewise, a significant increase in soil microbial biomass carbon (15%) and nitrogen (37%) was noticed with the combined use of all organic amendments. Moreover, the combined application of biochar, compost and biogas slurry enhanced soil urease and β-glucosidase activity up to 96% and 67% over control respectively. In addition, plant height, chlorophyll content, water use efficiency and 1000-grain weight were also enhanced up to 54%, 90%, 53% and 21% respectively, with the combined use of all amendments. Here, biochar addition helped to reduce the nutrient losses of compost and biogas slurry as well. It is concluded that biochar application in combination with compost and biogas slurry could be a more sustainable, environment-friendly and cost-effective approach, particularly for less fertile soils.

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Section: Effect Of Organic Amendments On Nutritional Status Of Maizesupporting

confidence: 83%

Efficiency of Wheat Straw Biochar in Combination with Compost and Biogas Slurry for Enhancing Nutritional Status and Productivity of Soil and Plant

Abbas

Naveed

Azeem

et al. 2020

Plants

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“…The biochar yields of the two agricultural residues were similar (between 45 and 46%) and increased (by 9 to 16%) from Ri + S, Ri + C, Cf + S, and Cf + C samples (Table 2). Previous studies have established that the main transformations of the biomass submitted to pyrolysis at 380°C, are loss of moisture and hydration water, and the decomposition of hemicellulose and cellulose, but the effect of pyrolysis on the biochar yield depends on the composition of the raw material (He et al, 2018;Zhang et al, 2020). In our case, the content of these compounds in rice and coffee husks is similar (Boufi, 2017;Oliveira et al, 2018), which explains the similar yields obtained.…”

Section: Biochar Yieldsupporting

confidence: 74%

Variation in the properties of biochars produced by mixing agricultural residues and mineral soils for agricultural application

et al. 2020

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The research and application of biochars enriched with minerals have increased in recent years; however, the mineral fraction used consists of specific minerals, such as clay minerals and synthesized compounds. In this work, the effects of adding two specific soil types (sandy and clayey) to rice and coffee husks in order to generate biochars via pyrolysis was investigated. Chemical, physical–chemical, thermal, spectroscopic and crystallographic analyses were conducted on the produced biochars. The study confirmed that the presence of mineral soils during the pyrolysis process increases the yield, C retention ratio, and specific surface area. It also decreases the pH, cation exchange capacity (CEC), nutrient content, and carbon-to-nitrogen ratio of biochars. However, the biochars produced by mixing coffee husks and mineral soils still demonstrate a capacity to increase the pH and the CEC of tropical soils. In addition, increased C retention demonstrates an environmental benefit of this biochar production method. Biomass pyrolysis combined with clayey soil results in a biochar with a higher degree of aromaticity and higher thermal stability when compared to biomass pyrolysis alone. These characteristics give the biochar a recalcitrant character, without the necessity for steps related to the synthesis of specific mineral compounds, which reduces the economic and energy cost of the process.

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“…The increase of ash contents as temperature increased might be due to the accumulation of minerals and destructive volatilization of lignocellulosic matters when temperature increased (Tsai et al, 2012; Zhang et al, 2015). Previous studies also reported that biochar ash contents varied with feedstock (Peterson & Brown, 2020; Zhang et al, 2020). High levels of inorganic compounds in SB might account for the higher ash contents (Peterson & Brown, 2020).…”

Section: Discussionmentioning

confidence: 83%

Pyrolysis temperature and feedstock alter the functional groups and carbon sequestration potential of Phragmites australis‐ and Spartina alterniflora‐derived biochars

Wang

Bai

et al. 2021

GCB Bioenergy

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Biochar produced by pyrolysis of biomass under oxygen‐limited conditions has recently attracted increasing attention. To investigate the effects of feedstock and pyrolysis temperature on biochar characteristics, Phragmites australis straw and Spartina alterniflora straw were used to produce biochars at different temperatures from 300 to 500°C with an increment of 50°C. The biochars were characterized by their yields, ash contents, elemental compositions (i.e., carbon [C], hydrogen [H], oxygen [O], and nitrogen [N]), functional groups, dissolved organic carbon (DOC) contents, carbon sequestration potential, higher heating values (HHVs), and production costs. The results illustrated that pyrolysis temperature negatively affected biochar yields, H and O contents. In contrast, biochar produced at high temperature showed high ash contents, C contents, HHVs, and stronger aromaticity with low H/C and O/C ratios. In addition, S. alterniflora‐derived biochar (SB) contained higher ash content but lower C/H/N/O contents and HHVs than P. australis‐derived biochar (PB; p < 0.05). In addition, DOC contents in both SB and PB declined as temperature increased, and SB exhibited higher DOC contents than PB. Fourier transform infrared spectroscopy showed that absorption intensities of –OH, C=O, –CH, and –C–O–C‐stretching vibration declined with increasing temperature. The stability of the biochars was enhanced at high temperatures, and the biochar derived from S. alterniflora at 500°C might have a better carbon sequestration potential according to thermogravimetric analysis. Additionally, cost analysis showed that the production cost of biochar with large‐scale reactor was lower than that with bench‐scale reactor, and SB had a higher cost than PB due to the price of feedstock and drying process for the former. Our results could offer effective information on resource utilization of P. australis and S. alterniflora straw and are valuable for optimizing pyrolysis temperature to tune P. australis and S. alterniflora biochar properties for specific environmental usage.

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Effect of pyrolysis temperature and correlation analysis on the yield and physicochemical properties of crop residue biochar

Cited by 245 publications

References 50 publications

Efficiency of Wheat Straw Biochar in Combination with Compost and Biogas Slurry for Enhancing Nutritional Status and Productivity of Soil and Plant

Efficiency of Wheat Straw Biochar in Combination with Compost and Biogas Slurry for Enhancing Nutritional Status and Productivity of Soil and Plant

Variation in the properties of biochars produced by mixing agricultural residues and mineral soils for agricultural application

Pyrolysis temperature and feedstock alter the functional groups and carbon sequestration potential of Phragmites australis‐ and Spartina alterniflora‐derived biochars

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