Safety, Economic, and Environmental Optimization Applied to Three Processes for the Production of Solar-Grade Silicon

Ramírez‐Márquez, César; Contreras-Zarazúa, Gabriel; Martı́n, Mariano; Segovia‐Hernández, Juan Gabriel

doi:10.1021/acssuschemeng.8b06375

Cited by 33 publications

(15 citation statements)

References 26 publications

(57 reference statements)

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“…At the RD columns for the production of TEOS, the reflux ratio is small, 1.21. This value is consistent with the production of silane reported by Ramı́rez Márquez . Regarding the deposition reactors, the temperature of 1500 K is the highest reported among all scenarios, and it is consistent with the highest production of polycrystalline silicon achieved in this scenario.…”

Section: Resultssupporting

confidence: 90%

“…The models of the thermal carboreduction, the hydrochlorination reactor, separation and purification, and deposition reactor were developed in the work of Ramı ́rez-Maŕquez. 25 2.2.1. Thermal Carboreduction.…”

Section: Methodsmentioning

confidence: 99%

“…On the basis of a previous work of Ramı́rez-Márquez et al, the distillation columns were rigorously modeled using Aspen Plus. To develop surrogate models for the chlorosilanes distillation, the product purity and size of the distillation columns were fixed in the simulations while the decision variables are the feed and the reflux ratios to compute the energy consumption and operating temperatures of each column.…”

Section: Methodsmentioning

confidence: 99%

“…With the use of the Aspen Plus model developed in a previous work, data on the operation of the RD column was collected for each TEOS purity. In this work a superstructure with the three products in parallel is developed.…”

Section: Methodsmentioning

confidence: 99%

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Optimal Portfolio of Products in a Polycrystalline Silicon Refinery

Ramírez‐Márquez

Hernández

Martı́n

et al. 2020

Ind. Eng. Chem. Res.

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The silicon industry is a source of various types of products, including materials for the implementation of renewable energy systems, with a comparatively lower environmental impact than conventional fossil energy sources and high added value byproducts. In this context, the exploitation of the different byproducts generated in the production of polycrystalline silicon (polysilicon) offers opportunities to increase the economics of the polycrystalline silicon production process. In this work, a silicon based refinery is conceptually designed using surrogate models for the major units to evaluate the portfolio of products. Although the main product is polysilicon, there are a number of products that might be obtained in the process to improve its profitability, such as tetraethoxysilane (at different purities) as well as chlorosilanes, including SiH 4 , SiH 2 Cl 2 , and SiH 3 Cl. Next, an economic evaluation of the facility is carried out to determine its economic feasibility. The results show that the refinery produces tetraethoxysilane and chlorosilanes in addition to the production of polysilicon. The proposed design reduces the cost for polycrystalline silicon to 6.86 $/kg, compared to a cost of 8.93 $/kg of polycrystalline silicon if the plant does not generate high value-added byproducts, both values below the commercial price of polycrystalline silicon, which is estimated at 10 $/kg. Therefore, the refinery is not only capable of meeting the market share requirements, but in a way that the generation of different high added value byproducts increases the plant profit compared to that of the net income earned by traditional polysilicon monoproduct plants.

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Section: Resultssupporting

confidence: 90%

Section: Methodsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

See 2 more Smart Citations

Optimal Portfolio of Products in a Polycrystalline Silicon Refinery

Ramírez‐Márquez

Hernández

Martı́n

et al. 2020

Ind. Eng. Chem. Res.

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“…Refining of metallurgical Si generates approximately 14 kg of waste per kg of solar-grade crystalline Si . Alternatively, chemical purification (e.g., Siemens, Bayer, and fluidized bed reactor processes) ,, is possible if the solid metallurgical Si is first gasified into molecular silanes. This strategy has the advantage that silanes can be readily distilled, separated, and purified to a much greater degree than molten Si.…”

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confidence: 99%

The Importance of New “Sand-to-Silicon” Processes for the Rapid Future Increase of Photovoltaics

Maldonado

2020

ACS Energy Lett.

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Feedstock planning and optimization of a sustainable distributed configuration biorefinery for biojet fuel production via ATJ process

Rivas‐Interian

Sánchez‐Ramírez

Quiroz‐Ramírez³

et al. 2022

Biofuels Bioprod Bioref

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In recent years, the production and consumption of fossil jet fuel have increased as a consequence of a rise in the number of passengers and goods transported by air. Despite the low demand caused by the coronavirus 2019 pandemic, an increase in the services offered by the sector is expected again. In an economic context still dependent on scarce oil, this represents a problem. There is also a problem arising from the fuel's environmental impact throughout its life cycle. Given this, a promising solution is the use of biojet fuel as renewable aviation fuel. In a circular economy framework, the use of lignocellulosic biomass in the form of sugar‐rich crop residues allows the production of alcohols necessary to obtain biojet fuel. The tools provided by process intensification also make it possible to design a sustainable process with low environmental impact and capable of achieving energy savings. The goal of this work was to design an intensified process to produce biojet fuel from Mexican lignocellulosic biomass, with alcohols as intermediates. The process was modeled following a sequence of pretreatment/hydrolysis/fermentation/purification for the biomass‐ethanol process, and dehydration/oligomerization/hydrogenation/distillation for ethanol‐biojet process under the concept of distributed configuration. To obtain a cleaner, greener, and cheaper process, the purification zone of ethanol was intensified by employing a vapor side stream distillation column and a dividing wall column. Once designed, the entire process was optimized by employing the stochastic method of differential evolution with a tabu list to minimize the total annual cost and with the Eco‐indicator‐99 to evaluate the sustainability of the process. The results show that savings of 5.56% and a reduction of 1.72% in Eco‐indicator‐99 were achieved with a vapor side stream column in comparison with conventional distillation. On the other hand, with a dividing wall column, savings of 5.02% and reductions of 2.92% in Eco‐indicator‐99 were achieved. This process is capable of meeting a demand greater than 266 million liters of biojet fuel per year. However, the calculated sale price indicates that this biojet fuel still does not compete with conventional jet fuel produced in Mexico. © 2022 Society of Chemical Industry and John Wiley & Sons, Ltd.

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Safety, Economic, and Environmental Optimization Applied to Three Processes for the Production of Solar-Grade Silicon

Cited by 33 publications

References 26 publications

Optimal Portfolio of Products in a Polycrystalline Silicon Refinery

Optimal Portfolio of Products in a Polycrystalline Silicon Refinery

The Importance of New “Sand-to-Silicon” Processes for the Rapid Future Increase of Photovoltaics

Feedstock planning and optimization of a sustainable distributed configuration biorefinery for biojet fuel production via ATJ process

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