Salvador Tututi-Avila

Autonomous University of Nuevo León | UANL · Facultad de Ciencias Químicas

Dividing-wall columns (DWCs) have significant potential as energy-efficient processes for the separation of multicomponent mixtures. However, in addition to an efficient steady state design, dynamics and control also play a major part for the success of a technology. This is especially so for complex distillation systems. This paper investigates th...

Because of their potential energy savings, dividing-wall columns (DWCs) have been viewed as an interesting alternative to the use of sequences based on conventional distillation columns. The energy savings, however, must be supported by suitable controllability properties for a proper operation. In this study we use a design methodology to optimize...

This paper deals with design and control of an extractive dividing-wall distillation column (EDWC) for ethanol dehydration using ethylene glycol as entrainer. An initial design, based on a section analogy procedure for a conventional extractive distillation sequence, was obtained and then used in an opti- mization process to minimize the total annu...

In this work, a feedback control algorithm was developed based on geometric control theory. A nonisothermal seeded continuous crystallizer model was used to test the algorithm. The control objectives were the stabilization of the third moment of the crystal size distribution ( μ 3 ) and the crystallizer temperature ( T ); the manipulated varia...

The novel modified absorption heat pump (MAHP) with the H2O-LiBr working mixture for cogeneration applications is introduced. The MAHP can simultaneously produce electric energy and heat revaluation. The proposed system has the particularity that it can be powered by alternative thermal sources (such as solar energy, biomass, geothermal) or industr...

Sargent columns have been shown to reduce energy consumption significantly for chemical separations with four product streams. However, the number of vapor splits needed to operate the system poses operational concerns. As a result, simplified configurations have been investigated to reduce vapor splits. This study aims to examine the economic desi...

Mexico, similarly to other developing countries, has planned landfilling as the central technology to manage municipal solid waste (MSW). In this research, the current and future situation of final disposal of MSW in Mexico was studied, focusing on the spatial and temporal evaluation of final disposal sites (FDS), landfill gas (LFG) emissions, and...

Dividing-wall columns (DWCs) are intensified processes that have attracted industrial and academic attention due to the reduction in operating and installation costs compared to traditional distillation systems. Several methodologies are available for the design of DWCs. Most of them consist of three parts: an analysis of operating variables; an an...

Inherent safety is well known as the best technique of risk management, but its implementation is a challenge when there is a conflict with other factors, in particular with the process dynamic performance when the application of the minimization principle is considered. In this work, a combined safety-controllability index applicable during the de...

The modeling of an innovative absorption heat pump-transformer-power cycle is presented. The performance of the thermodynamic cycle is first analyzed operating with the ammonia-water mixture, and then the results are compared with the same system but operating with the ammonia-lithium nitrate mixture. Net power, thermal efficiency, exergy efficienc...

Intensified multi-partition dividing wall distillation columns (DWCs) have attracted the attention of academy and industry as they present benefits in the capital and operating costs over traditional and single-partition distillations systems. This work investigates and compares the economic and dynamic performance of commonly used four-product DWC...

This work presents a new methodology to perform dynamic transitions among different chemical products in an intensified reactive distillation column. The procedure consists of a switchability analysis to identify the actions needed to switch between different products. This is followed by a dynamic analysis that aims to seek for feasible control sc...

The extraction of bioactive compounds is an interesting alternative to add value to agroindustrial waste, due to its demand in the pharmaceutical and food industry. The extraction of these compounds is highly dependent on the solvent used. The extraction of these compounds is limited by a small variety of solvents. Currently, there is no extraction...

A fuzzy multiple-input-multiple-output (MIMO) control algorithm was developed and applied to control a non-isothermal continuous crystallizer. The algorithm included two feedback control loops and two decouplers. The first loop controls the crystallizer temperature manipulating the cooling water flow rate, and the second loop controls the crystal s...

Dividing wall distillation technologies have been amongst the most important contributions to process intensification efforts over the last few decades. This work focuses on design, dynamics and control of an extended dividing wall distillation column, referred to as a satellite column, and its comparison to the performance of a Kaibel column and t...

Silane has found recent applications in the manufacture of solar photovoltaic cells, which provide solar power economically. One method for the production of silane takes trichlorosilane as a starting molecule, with a reaction mechanism that involves two other intermediate valuable products, dichlorosilane and monochlorsilane. The production system...

Reactive distillation is the one of the best examples of process intensification. In this paper we present a reactive distillation design for multi-production of silanes based on reactive distillation. Three silane products of interest, dichlorosilane, monochlorosilane, and silane, are to be produced using the same equipment. The design approach us...

A novel extractive distillation system is presented. The proposed separation system evolves from an extractive thermally coupled system with a side rectifier. Specifically, the modification involves substituting the thermal coupling, i.e., the vapor-liquid interconnection, by a liquid side stream fed to a modified second column of the arrangement....

Dividing-Wall Distillation columns represent a major advance in the distillation area because they can result in significant reductions of energy consumption and capital investment. Some estimates for the reductions are as high as 30% over conventional separation sequences (Christiansen et al., 1997; Kiss & Bildea, 2011; Massimiliano et al., 2009)....