Experimental investigations of bio-syngas production using microwave pyrolysis of UAE’S palm date seed pits

Elnajjar, Emad; Syam, Mahmmoud M.; Al-Omari, Salah Addin Burhan

doi:10.1016/j.fuel.2021.121348

Cited by 21 publications

(7 citation statements)

References 36 publications

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“…The total waste of date palms is about 620,000 MT. Several attempts have been made to convert palm date biomass into valuable materials, such as activated carbon [21], hydrogel [22], biodiesel [23], and syngas [24]. However, most date palm wastes, such as leaves, twigs, and fibers, are not fully utilized in most cases and are usually burned, leading to numerous environmental problems (e.g., the unrestricted release of hazardous flue gas consisting of soot, CO 2 , NO x , SO x , etc.…”

Section: Introductionmentioning

confidence: 99%

Enhanced Adsorption of Methylene Blue Using Phosphoric Acid-Activated Hydrothermal Carbon Microspheres Synthesized from a Variety of Palm-Based Biowastes

et al. 2023

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In the present study, the ability for novel carbon microspheres (CMs) derived from date palm (Phoenix dactylifera) biomass using a hydrothermal carbonization (HTC) process and activated using phosphoric acid to remove methylene blue dye was investigated. Three types of palm-based wastes (seeds, leaflet, and inedible crystallized date palm molasses) were used and converted to CMs via the HTC process. The prepared samples were then activated using phosphoric acid via the incipient wetness impregnation method. The CMs samples before and after activation were analyzed using scanning electron microscopy (SEM), elemental analysis and scanning (CHNS), and the Fourier transform infrared (FTIR) and Brunauer–Emmet–Teller (BET) methods. The samples exhibited high BET surface areas after activation (1584 m2/g). The methylene blue adsorption results showed good fitting to the Langmuir, Fruendlich, and Temkin isotherm models for all activated samples. The maximum adsorption capacity achieved was 409.84 mg/g for activated CM obtained from the palm date molasses, indicating its high potential for application as a dye-based adsorption material.

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Section: Introductionmentioning

confidence: 99%

Enhanced Adsorption of Methylene Blue Using Phosphoric Acid-Activated Hydrothermal Carbon Microspheres Synthesized from a Variety of Palm-Based Biowastes

et al. 2023

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“…The highest yield of BO was 53.36 %, produced at 500 °C for 0.5 h and 150 ml min À 1 N 2 gas flow rate. Microwave pyrolysis of DS for bio-syngas was announced by Elnajjar et al [14] The catalytic pyrolysis of date kernel employing the Jordanian Tripoli as a natural catalyst for BO production was inspected by Aljeradat et al [15] Fadhil et al [16] conducted thermal pyrolysis of DS and found that the excellent yield of BO was produced at 500 °C for 60 min and 0.25 mm particle size. The production of BC via thermal decomposition of DS for preparing AC to eliminate NaCl from saline solution was established by Abdul Hai et al [17] Hai et al [18] also explored the thermo-kinetics of DS loaded with layered double hydroxide (LDH) through TGA and announced that the yield of BO was in the range of 65 and 67 %.…”

Section: Introductionmentioning

confidence: 99%

“…The highest yield of BO was 53.36 %, produced at 500 °C for 0.5 h and 150 ml min −1 N 2 gas flow rate. Microwave pyrolysis of DS for bio‐syngas was announced by Elnajjar et al [14] . The catalytic pyrolysis of date kernel employing the Jordanian Tripoli as a natural catalyst for BO production was inspected by Aljeradat et al [15] .…”

Section: Introductionmentioning

confidence: 99%

Pyrolysis of Mixed Date Stones and Pistachio Shells: Identification of Bio‐Oil and Utilization of Bio‐Char as Activated Carbon Precursor

Ibrahim

Mahmood

Younis

et al. 2023

Chemistry & Biodiversity

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Thermal pyrolysis of mixed date stones and pistachio shells in a semi‐batch reactor was addressed in this study. The highest yield of liquids (51.20 %) was produced at 500 °C, 90 min, 20 °C/min heating rate, and 50 mesh particle size. Under these conditions, yield of liquid from date stones and pistachio shells separately was 49.12 % and 47.67 %, respectively. The FT‐IR results confirmed the presence of multiple oxygen‐containing compounds in the bio‐oil. Results from GC–MS declared that it was predominately composed of acids (57.57 %), esters (21.35 %), phenols (4.63 5), and alcohols (3.49 5). The obtained biochar was transformed into activated carbon (AC) by the optimized ZnCl2 activation method. The ideal AC was synthesized at 600 °C for 60 min using a 2 : 1 ZnCl2: biochar impregnation ratio. FESEM and XRD measurements showed that the AC was amorphous. The prepared AC was effective in eliminating dibenzothiophene (DBT) from model fuel (200 ppm DBT/hexane) with a maximum performance 95.26 % at 40 °C for 1h using 0.35 g of the AC. The exhausted AC was regenerated and reutilized 4 times, and removal efficiency reached 88.23 % in the 4th cycle under ideal working conditions.

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“…There is an increasing amount of research studies focused on the use of microwaves in the pyrolysis of biomass feedstocks, such as corn stover [29,36], pine sawdust [32,[37][38][39], bamboo sawdust [39,40], oil palm male flowers [41], palm kernel shells [42], oil palm empty fruit bunches [43], rice husks [44][45][46], macadamia shells [47], wood [48,49], sugar cane bagasse [50,51], walnut shells [52], orange peels [53], banana peels [54], and seeds [55,56], among others. According to these publications, the use of microwave heating in the pyrolysis of biomass can enhance the production of biofuels and chemicals products.…”

Section: Introductionmentioning

confidence: 99%

Catalytic Microwave-Assisted Pyrolysis of the Main Residue of the Brewing Industry

et al. 2023

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Most agro-industrial wastes are lignocellulosic biomass. Several technologies have been developed to convert these residues to value-added products. Among these processes, pyrolysis refers to the thermal degradation of organic materials. Microwave-assisted pyrolysis (MAP) is more advantageous than conventional pyrolysis because it offers time savings, increases heating efficiency, and promotes a more precise process control. In this work, the microwave-assisted pyrolysis (MAP) of brewer’s spent grain (BSG), the main waste of the brewing industry, was studied, focusing on its liquid product. The effects of temperature, moisture content, and catalyst (calcium oxide) percentage on the product distribution and hydrocarbon content in the liquid product obtained were investigated. Although a high liquid yield of 71.8% was achieved with a BSG moisture content of 14%, the quality of the product (hydrocarbon yield) in this condition was not so attractive (21.60%). An optimization study was carried out to simultaneously maximize bio-oil yield and quality. The optimum conditions obtained were a temperature of 570 °C and a catalyst/biomass ratio of 12.17%. The results of the liquid product composition at the optimum point are promising given the presence of aromatic hydrocarbons, organic compounds of great interest to the industry.

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Experimental investigations of bio-syngas production using microwave pyrolysis of UAE’S palm date seed pits

Cited by 21 publications

References 36 publications

Enhanced Adsorption of Methylene Blue Using Phosphoric Acid-Activated Hydrothermal Carbon Microspheres Synthesized from a Variety of Palm-Based Biowastes

Enhanced Adsorption of Methylene Blue Using Phosphoric Acid-Activated Hydrothermal Carbon Microspheres Synthesized from a Variety of Palm-Based Biowastes

Pyrolysis of Mixed Date Stones and Pistachio Shells: Identification of Bio‐Oil and Utilization of Bio‐Char as Activated Carbon Precursor

Catalytic Microwave-Assisted Pyrolysis of the Main Residue of the Brewing Industry

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