Hideaki Sekiguchi

The synthesis of a new type adsorbent for the removal of toxic gas by radiation-induced graft polymerization

Abstract A new type of adsorbent containing sulfulic acid group for the removal of ammonia gas was synthesized by radiation-induced graft polymerization of styrene onto fibrous and nonwoven type polypropylene followed by sulufonation with chlorosulfonic acid. The rate of the adsorption of ammonia gas by H-type adsorbent is independent of the ion-exchange capacity. The amount of ammonia gas adsorbed by the chemical adsorption was dependent on the ion-exchange capacity of H-type fibrous adsorbent and was kept constant value in spite of the equilibrium pressure of ammonia gas. Cu(II)- and Ni(II)-types fibrous adsorbent were prepared by the ion exchange reaction of Na-type fibrous adsorbent with metal nitrate solutions. Although, the rate of adsorption of ammonia gas by metal-type fibrous adsorbent is lower than that of H-type adsorbent, the amount of ammonia gas adsorbed increase compared to H-type adsorbent with the same ion exchange capacity. It was related to the highest coordination number of metal ion. The ratio of the number of ammonia molecules adsorbed chemically and the number of metal ion adsorbed in fibrous adsorbent was 4 for Cu-type and 6 for Ni-type fibrous adsorbent, respectivelly.

A PHOTOVOLTAIC POWER GENERATING SYSTEM PROVIDED WITH REDOX FLOW BATTERY

ABSTRACT In photovoltaic system technologies, storage problems seem to be an important factor. To ease these circumstances the authors suggest that redox flow battery technology can be introduced to PV systems. It has the following unique advantages, i.e., (1) the voltage adjustability by using tapped stack conformation, (2) good economical features specially in the case of a long duration storage cycle, (3) low self discharge performance, and so on. In this paper details are presented concerning the design and experimental results of a newly developed battery rated 1 kW - 4 kWh.