Sorption Characteristics of Organic Powder Sorption Material in Fluidized Bed with a Cooling Pipe

Abstract

The dynamic sorption characteristics of organic sorbent materials have been studied by using fluidized bed with a cooling pipe. The organic powder type sorbent made from a bridged complex of sodium polyacrylate which is one of the sorption polymers is adopted in this study. Sorption rate of water vapor and the variation of temperature in the sorbent bed with time were measured under various conditions. As a result, sorption ratio increases and the completion time for the sorption process decreases by using a cooling pipe. Furthermore, the non-dimensional correlation equations were obtained for water vapor mass transfer under sorption process in terms of relevant non-dimensional parameters.

Continuous Sorption and Desorption of Organic Sorbent Powder in Two Connected Fluidized Beds

“…And contrary reaction occurs at sorption chamber as exothermic reaction, water vapor sorbed increasing is followed by the increasing sorbent temperature. This result coincides with Horibe et al (13) that the increase of sorbent temperature by increasing air velocity could be explained by the fact that an increase of heat generation in the sorption process is brought by increasing water vapor supply to the sorbent and mass transfer coefficient. The effects of process air velocity on desorption and sorption performance can be seen in Figure 10.…”

Review of Fluidized Bed Technology Application for Adsorption Cooling and Desalination Systems

“…The bed-to-wall heat transfer coefficient achieves much higher values with the fluidized bed than with single-phase convection [34,68]. Inside the fluidized bed, individual points with higher temperatures are quickly dissipated and characterized by a uniform temperature distribution [59,66,69]. Rapid temperature equalization throughout the bed volume occurs.…”

Silica gel polymer composite desiccants for air conditioning systems

“…Polyacrylic acid, which is a powder, is one of the raw materials used in diapers and can adsorb a large amount of water (up to 80 times their own volume). Polymer desiccant has been tested for application in dehumidification systems [9][10][11][12][13] and the results show that it can adsorb and desorb moisture over 40,000 times [11]. The polymer adsorbs water by increasing its volume but will return to its original volume after drying.…”

“…The polymer repeats the adsorption process and expands its volume to the maximum value. However, the degree of expansion of adsorbing moisture is not as exaggerated, because of material properties and the principle of adsorption [9,10].…”

“…Daou et al [8] achieved a breakthrough in which calcium chloride was impregnated into silica pores to develop a high performance desiccant without a spillover phenomenon. Polymer desiccants have been researched intensively in the last decade [9,10] Greek symbol viscosity coefficient of air (Pa s) a very large sorption capacity and are inexpensive. According to the report by Lee et al [11], the sorption capacity of a super desiccant polymer (SDP) is two to three times higher than silica gel; SDPs achieved greater dehumidification than a silica gel wheel when operating in high relative humidity and low temperature regeneration (40-50 • C) air, as shown by White et al [12].…”