Comparative analysis of the properties of biochars produced from different pecan feedstocks and pyrolysis temperatures

Liu, Zhuangzhuang; Jia, Mingyun; Li, Qi; Lu, Shanfa; Zhou, Dongqin; Feng, Liuchun; Hou, Zhaoqi; Yu, Jinping

doi:10.1016/j.indcrop.2023.116638

Cited by 24 publications

(15 citation statements)

References 57 publications

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“…Pyrolysis temperature is an important factor affecting the adsorption of nitrogen and phosphorus by biochar. Some researchers found [ 98 ] that with the pyrolysis temperature increasing from 400 °C to 600 °C, the surface area and total pore volume showed an upward trend because at higher pyrolysis temperatures, the loss of volatile substances would promote the formation of more micropores, which led to an increase in pore volume and specific surface area [ 99 ]. However, there were also cases where the surface area and pore volume increased or decreased irregularly with increasing temperature [ 100 ].…”

Section: Factors Affecting Adsorption Of Nitrogen and Phosphorus By B...mentioning

confidence: 99%

Efficient Adsorption of Nitrogen and Phosphorus in Wastewater by Biochar

Wu,

Quan,

Chen

et al. 2024

Molecules

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Nitrogen and phosphorus play essential roles in ecosystems and organisms. However, with the development of industry and agriculture in recent years, excessive N and P have flowed into water bodies, leading to eutrophication, algal proliferation, and red tides, which are harmful to aquatic organisms. Biochar has a high specific surface area, abundant functional groups, and porous structure, which can effectively adsorb nitrogen and phosphorus in water, thus reducing environmental pollution, achieving the reusability of elements. This article provides an overview of the preparation of biochar, modification methods of biochar, advancements in the adsorption of nitrogen and phosphorus by biochar, factors influencing the adsorption of nitrogen and phosphorus in water by biochar, as well as reusability and adsorption mechanisms. Furthermore, the difficulties encountered and future research directions regarding the adsorption of nitrogen and phosphorus by biochar were proposed, providing references for the future application of biochar in nitrogen and phosphorus adsorption.

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Section: Factors Affecting Adsorption Of Nitrogen and Phosphorus By B...mentioning

confidence: 99%

Efficient Adsorption of Nitrogen and Phosphorus in Wastewater by Biochar

Wu,

Quan,

Chen

et al. 2024

Molecules

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“…Six pecan biochars were prepared using similar methods as previously described [26,27]. Then, the iron containers with samples were put in a KSL-1200X muffle furnace (HeFei-Kejing, China) under an anaerobic condition.…”

Section: Production Of Biocharmentioning

confidence: 99%

“…The particle size distribution of six pecan biochars was measured with a dry sample testing method using a MS2000 laser particle size analyzer (Malvern Instruments, Malvern, UK). According to the methods and equipment described previously [26], the specific surface area (SSA) and the pore structure (total pore volume-TPV, and average pore diameter-APD) of the pecan biochar samples were measured, and the scanning electron microscope (SEM) photos for the biochar morphology were taken at a magnification of 500× with a scale of 100 µm. The surface functional groups in biochar were detected using Fourier transform infrared (FTIR) spectroscopy (VERTEX 80 V, Bruker, Bremen, Germany).…”

Section: The Determination Of the Biochar Propertiesmentioning

confidence: 99%

“…In a previous study by Zhang et al, two types of biochars were made from pecan nutshells and pruned wastes, and their properties were analyzed [25]. Additionally, Liu et al prepared biochars of pecan branches, leaves, and nutshells under different carbonization temperatures, evaluating the application potential of different biochars based on their properties [26]. Although more attempts are appearing in the study of biochars from different types of pecan wastes, the pyrolysis preparation of biochar from major wastes such as trunks, roots, and husks, and the comprehensive analysis of the characteristics of biochar from a variety of pecan wastes have not yet been reported.…”

Section: Introductionmentioning

confidence: 99%

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Feedstock-Induced Changes in the Physicochemical Characteristics of Biochars Produced from Different Types of Pecan Wastes

Zhang,

Peng,

et al. 2024

Forests

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Large amounts of residues are generated in pecan cultivation processes. Biochar is an environmentally friendly way to utilize residues but attempts to prepare and apply biochar with pecan residues are rare. In this study, six types of biochars were produced from pecan branches, trunks, roots, nutshells, husks, and leaves under pyrolysis, and their physicochemical properties were compared to assess their application perspective in environmental and agricultural fields. The yields of six pecan biochars were 32.1%–45.9%, with the highest yield for husk biochar (HB) (45.9%). Among the pecan biochars, trunk biochar (TB) and root biochar (RB) had much larger specific surface areas. Branch biochar (BB), TB, and RB presented tubular structures with elliptical pores, while nutshell biochar (NSB), HB, and leaf biochar (LB) appeared flaky or as clustered structures with relatively rougher outer surfaces and irregular pores. The functional group types of pecan biochars were generally similar, but the intensities of the peak near 2900 cm−1 in BB were obviously higher than those of the other biochars. RB and LB contained significantly more ash and volatile than those of the other pecan biochars, with the highest fixed carbon content being found in NSB (70.1%). All of the pecan biochars were alkaline (7.90–9.87), and HB, LB, and NSB had significantly higher pH values than those of the other biochars. Elemental analysis indicated that RB, NSB, and LB had higher carbon levels (more than 70%) with lower O/C ratios (no more than 0.2). HB possessed a relatively high content of nitrogen, potassium, magnesium; the phosphorus content was highest in NSB; LB had the highest calcium content. The results of principal component analysis showed that BB, LB, and NSB were clustered in the same quadrant with relatively close relationships. The results of this study can guide the utilization of pecan wastes and their application as biochar in different fields.

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“…For this reason, optimizing the temperature and feedstock composition is essential to attain the intended quality of products. For instance, a balance must be struck between maximizing carbon content and ensuring biochar’s suitability for its intended use, which includes but is not limited to carbon sequestration, soil modification, and energy . The bio-oil or liquid produced through this process is characterized by its rich content of organic chemical compounds.…”

Section: Introductionmentioning

confidence: 99%

Co-Pyrolysis of Date Palm Waste and Salicornia Bigelovii: Insights for Bioenergy Development in Arid and Semi-Arid Regions

Ahmad,

Makkawi,

Samara

2024

ACS Omega

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Bioenergy is predicted to significantly contribute to the global energy needs of both developed and developing economies. Co-pyrolysis of halophytes offers a solution for a sustainable supply of feedstock in coastal and water-scarce regions. This novel research introduces an experimental investigation of co-pyrolysis of saline-tolerant flora (date palm waste and Salicornia bigelovii) to address sustainable waste management, bioenergy production, and efficient resource utilization in xeric regions. To examine the impact of the thermic condition on the pyrolysis products (bio-oil, biochar, and gas), the experiments have been conducted at three different temperatures (400, 500, and 600 °C). This pioneering study revealed that the co-feed bio-oil is acidic (pH 3.76–4.39) and has a high energy content (HHV 32.29–36.29 MJ/kg) that surpasses most woody biomass. The produced biochar was chemically stable, high in ash (40.09–47.62 wt %), high in fixed carbon (30.12–38.12 wt %), highly alkaline (pH 9.37–10.69), and low in HHV (16.30–17.2 MJ/kg). Increased pyrolysis temperature enhances biochar stability and fixed carbon, thus benefiting long-term carbon sequestration if applied in the soil. However, due to its high alkalinity, the application of this biochar in naturally alkaline sandy soils, such as in coastal deserts, requires careful monitoring. The hydrogen content in the gaseous phase significantly improves with rising temperature, reaching HHV = 24.12 MJ/kg at 600 °C, due to the enhanced ash catalytic effect. Overall, this study constitutes an important contribution to advancing bioenergy, sustainable feedstock, carbon capture, and waste management strategies in drought-prone areas.

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Comparative analysis of the properties of biochars produced from different pecan feedstocks and pyrolysis temperatures

Cited by 24 publications

References 57 publications

Efficient Adsorption of Nitrogen and Phosphorus in Wastewater by Biochar

Efficient Adsorption of Nitrogen and Phosphorus in Wastewater by Biochar

Feedstock-Induced Changes in the Physicochemical Characteristics of Biochars Produced from Different Types of Pecan Wastes

Co-Pyrolysis of Date Palm Waste and Salicornia Bigelovii: Insights for Bioenergy Development in Arid and Semi-Arid Regions

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