Introductory Chapter: Pyrolysis

Ibrahim, Hassan Al-Haj

doi:10.5772/intechopen.90366

Cited by 18 publications

(8 citation statements)

References 48 publications

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“…The pyrolysis produces syngas that is completely free of tar [ 20 ]; however, the hydrogen to carbon monoxide ratio is not high. Sometimes, it is considered as the first step in the gasification process because it maximizes the conversion of volatile materials (high carbon chain) to relatively low carbon hydrocarbons (<C25) [ 21 ]. Another process is co-gasification, which mixes two carbonaceous feedstocks such as plastic with coal or biomass to enhance the gas yield and suppress char formation [ 22 ].…”

Section: Introductionmentioning

confidence: 99%

Simulation and Modelling of Hydrogen Production from Waste Plastics: Technoeconomic Analysis

et al. 2022

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The global energy demand is expected to increase by 30% within the next two decades. Plastic thermochemical recycling is a potential alternative to meet this tremendous demand because of its availability and high heating value. Polypropylene (PP) and polyethylene (PE) are considered in this study because of their substantial worldwide availability in the category of plastic wastes. Two cases were modeled to produce hydrogen from the waste plastics using Aspen Plus®. Case 1 is the base design containing three main processes (plastic gasification, syngas conversion, and acid gas removal), where the results were validated with the literature. On the other hand, case 2 integrates the plastic gasification with steam methane reforming (SMR) to enhance the overall hydrogen production. The two cases were then analyzed in terms of syngas heating values, hydrogen production rates, energy efficiency, greenhouse gas emissions, and process economics. The results reveal that case 2 produces 5.6% more hydrogen than case 1. The overall process efficiency was enhanced by 4.13%. Case 2 reduces the CO2 specific emissions by 4.0% and lowers the hydrogen production cost by 29%. This substantial reduction in the H2 production cost confirms the dominance of the integrated model over the standalone plastic gasification model.

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Section: Introductionmentioning

confidence: 99%

Simulation and Modelling of Hydrogen Production from Waste Plastics: Technoeconomic Analysis

et al. 2022

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“…Lower Heating rates Yield increase Yield increase processes include also thermal decomposition, destructive and dry distillation, charring, tyre recycling and pyrolysis, liquefaction, high-and low-temperature carbonisation, coking and thermal and catalytic cracking (H. Al-Haj Ibrahim, 2020).…”

Section: Higher Pyrolysis Temperatures Yield Increasementioning

confidence: 99%

“…The decomposition reactions are accompanied in general with polymerisation and isomerisation reactions. Pyrolysis also is the process of conversion of buried organic matter into fossil fuels (H. Al-Haj Ibrahim, 2020).…”

Section: Introductionmentioning

confidence: 99%

Pyrolysis in the Chemical Industry and Its Major Industrial Applications

Ibrahim

2023

IST

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Pyrolysis is an irreversible thermochemical treatment process of materials at elevated temperatures in an inert atmosphere. Pyrolysis is used heavily in the chemical industry to produce many forms of carbon and other chemicals from petroleum, coal, wood, oil shale, biomass or organic waste materials, and it is the basis of several methods for producing fuel from biomass. The end products of pyrolysis include solid residual coproducts and ash, noncondensable gases and condensable liquids. These products can be controlled by optimizing pyrolysis parameters such as temperature and residence time.

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“…Petroleum coke is a granular, columnar or needle-like carbon substance composed of tiny graphite crystals, including green coke, calcined coke and needle-like coke. 1–3 It is used as a raw material for various industries, including prebaked anodes, industrial silicon, negative materials for new energy lithium batteries and so on. 4–6 The analysis of petroleum coke physicochemical properties has always been crucial in its research, including ash content, volatile matter and calorific value.…”

Section: Introductionmentioning

confidence: 99%