Prediction and estimation of biomass energy from agricultural residues using air gasification technology in Iran

Samadi, Seyed Hashem; Ghobadian, Barat; Nosrati, Masoud

doi:10.1016/j.renene.2019.10.109

Cited by 79 publications

(26 citation statements)

References 43 publications

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“…This is because the higher the moisture content present in the biomass, the greater the energy needed to start the combustion process; in other terms, if more energy is needed to vaporize the water present in the fuel, then less energy will be provided for the endothermic reaction responsible for maintaining combustion [89][90][91]. Several authors reported that the presence of moisture makes combustion difficult, as the calorific value is reduced, and this increases fuel consumption [92,93]. Other studies also claimed that high humidity generates environmental pollution due to an increase in the volume of combustion products and particulate material, not to mention the corrosion process is accelerated in the final part of the steam generator, and particles accumulate on the heating surfaces [94,95].…”

Section: Discussionmentioning

confidence: 99%

Waste Recovery through Thermochemical Conversion Technologies: A Case Study with Several Portuguese Agroforestry By-Products

Nunes

Loureiro²,

Sá³

et al. 2020

Clean Technol.

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Agroforestry waste stores a considerable amount of energy that can be used. Portugal has great potential to produce bioenergy. The waste generated during agricultural production and forestry operation processes can be used for energy generation, and it can be used either in the form in which it is collected, or it can be processed using thermochemical conversion technologies, such as torrefaction. This work aimed to characterize the properties of a set of residues from agroforestry activities, namely rice husk, almond husk, kiwi pruning, vine pruning, olive pomace, and pine woodchips. To characterize the different materials, both as-collected and after being subjected to a torrefaction process at 300 °C, thermogravimetric analyses were carried out to determine the moisture content, ash content, fixed carbon content, and the content of volatile substances; elementary analyses were performed to determine the levels of carbon, nitrogen, hydrogen, and oxygen, and the high and low heating values were determined. With these assumptions, it was observed that each form of residual biomass had different characteristics, which are important to know when adapting to conversion technology, and they also had different degrees of efficiency, that is, the amount of energy generated and potentially used when analyzing all factors.

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Section: Discussionmentioning

confidence: 99%

Waste Recovery through Thermochemical Conversion Technologies: A Case Study with Several Portuguese Agroforestry By-Products

Nunes

Loureiro²,

Sá³

et al. 2020

Clean Technol.

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“…T&WW is transferred from the waste fields to pretreatment part that is next to gasification and electricity generation unit. The gasification process consists of drying, pyrolysis, combustion and gasification (Safarianbana et al 2019). Drying occurs at a temperature 100-150 °C.…”

Section: Process Descriptionmentioning

confidence: 99%

Techno-Economic and Environmental Assessment of Power Supply Chain by Using Waste Biomass Gasification in Iceland

2020

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In this paper, technical, economic and environmental assessments are carried out for power supply chain by using timber and wood waste (T&WW) gasification in Iceland. The Icelandic municipalities were clustered into 35 subgroups based on various number of households/ inhabitants. Different expenses were taken into consideration, like capital, installation engineering, operation and maintenance costs and the interest rate of the investment. Regarding revenues, they come from the electricity sale and the fee paid by the Icelandic municipalities for waste collection and disposal. The economic feasibility was conducted based on the economic indicators of net present value (NPV) and discounted payback period (DPP), bringing together three different scenarios, with interest rates of 8% for Scenario 1, 10% for Scenario 2 and 13% for Scenario 3. The environmental analysis was also performed relied on the environmental impacts of global warming (GWP), acidification (AP) and eutrophication (EP) potentials. The results show that changing the interest rate does not have significant impact on NPV and DPP for all studied scenarios. NPV is positive for the municipalities with more than 150 inhabitants or for a gasification plant with the capability to generate greater than 45 kW. Moreover, electricity generation based on T&WW gasification would lead to a GWP of 13 tonCO 2eq (Subgroup 1) to 469 tonCO 2eq (Subgroup 35), AP of 173.6 tonSO 2eq (Subgroup 1) to 6187.2 tonSO 2eq (Subgroup 35) and EP potential of 331.9 tonNO 3eq (Subgroup 1) to 11,827.7 tonNO 3eq (Subgroup 35), yearly.

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“…About 10,800 million cubic meters of biogas from these wastes will be produced, which is a huge source for use in simultaneous heat and power (CHP) plants. The findings from Samadi et al [63] showed that the total energy obtained from agricultural waste using degassing technology was 341,290 Terajoules (TJ) and the amounts of electricity and heat generated by this energy were 66,075 and 399,112 Terajoules (TJ), respectively.…”

Section: Biomassmentioning

confidence: 99%

A Review on Energy and Renewable Energy Policies in Iran

Solaymani

2021

Sustainability

103

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Iran, endowed with abundant renewable and non-renewable energy resources, particularly non-renewable resources, faces challenges such as air pollution, climate change and energy security. As a leading exporter and consumer of fossil fuels, it is also attempting to use renewable energy as part of its energy mix toward energy security and sustainability. Due to its favorable geographic characteristics, Iran has diverse and accessible renewable sources, which provide appropriate substitutes to reduce dependence on fossil fuels. Therefore, this study aims to examine trends in energy demand, policies and development of renewable energies and the causal relationship between renewable and non-renewable energies and economic growth using two methodologies. This study first reviews the current state of energy and energy policies and then employs Granger causality analysis to test the relationships between the variables considered. Results showed that renewable energy technologies currently do not have a significant and adequate role in the energy supply of Iran. To encourage the use of renewable energy, especially in electricity production, fuel diversification policies and development program goals were introduced in the late 2000s and early 2010s. Diversifying energy resources is a key pillar of Iran’s new plan. In addition to solar and hydropower, biomass from the municipal waste from large cities and other agricultural products, including fruits, can be used to generate energy and renewable sources. While present policies indicate the incorporation of sustainable energy sources, further efforts are needed to offset the use of fossil fuels. Moreover, the study predicts that with the production capacity of agricultural products in 2018, approximately 4.8 billion liters of bioethanol can be obtained from crop residues and about 526 thousand tons of biodiesel from oilseeds annually. Granger’s causality analysis also shows that there is a unidirectional causal relationship between economic growth to renewable and non-renewable energy use. Labor force and gross fixed capital formation cause renewable energy consumption, and nonrenewable energy consumption causes renewable energy consumption.

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Prediction and estimation of biomass energy from agricultural residues using air gasification technology in Iran

Cited by 79 publications

References 43 publications

Waste Recovery through Thermochemical Conversion Technologies: A Case Study with Several Portuguese Agroforestry By-Products

Waste Recovery through Thermochemical Conversion Technologies: A Case Study with Several Portuguese Agroforestry By-Products

Techno-Economic and Environmental Assessment of Power Supply Chain by Using Waste Biomass Gasification in Iceland

A Review on Energy and Renewable Energy Policies in Iran

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