Construction of a Novel Bio-reactor System With Semiconductor-Photocatalysts

新型半导体光催化剂生物反应器系统的构建

• 批准号: 01470117
• 负责人: TONE Setsuji
• 金额: $ 3.26万
• 依托单位: Osaka University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for General Scientific Research (B)
• 财政年份: 1989
• 资助国家: 日本
• 起止时间: 1989 至 1990
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-01470117/
• 关键词: Semiconductor Photocatalyst; Coenzyme (NAD); Effective Absorption Coefficient; Light-Sterilization; Irradiation; High Pressure Mercury Lamp; Bacterium Sterilization Rate; Bio-Process; 酸化チタン; 菌体死減速度; 微生物; 酵素(アルコ-ルデヒドロゲナ-ゼ)

The semiconductor powders such as Tio_2, and Pt-impregnated Tio_2, under irradiation with a light, cause the excitation of electrons from valence to conduction bands and assist the photocatalytic oxidation and reduction of less reactive chemical species. In the present work, we obtained several findings by conducting the experimental studies in order to construct a bioreactor system with photocatalysts as follows :1. The regeneration of the coenzyme NAD (nicotinamide-adenine dinucleotide) with the enzyme (alcohol dehydrogenase) was examined by its photoreduction in Tio_2 suspensions. The enzymeimmobilized TiO_2 had both the activities of photochemical oxidation and enzymatic reduction of NAD. Itwas possible to achieve the cyclic reaction with NAD regeneration by this catalyst.2. Effective absorption coefficients of light were evaluated from the observed profile of light intensity in a square column with gas-liquid-solid dispersion containing TiO_2 particles. Quantum efficiencies were obtained from the measured photooxidation rates of NADH(reduced form of NAD) in a small annular photoreactor. In an annular reactor (10cm o. d., 4.6cm i. d.) and height (=1m) with gas-liquid-solid dispersion, photooxidation rates of NADH were measured and experimental results agreed well with those calculated from the model using the effective absorption coefficient.

在照射下，诸如TIO_2和PT浸渍的TiO_2之类的半导体粉末会导致从价引起的电子到传导带的激发，并有助于光催化氧化并减少反应性化学物质。在目前的工作中，我们通过进行实验研究获得了几个发现，以构建具有光催化剂的生物反应器系统，如下所示：1。辅酶NAD（烟酰胺 - 腺苷二核苷酸）与酶（酒精脱氢酶）的再生通过其在TIO_2悬浮液中的光摄取检查。酶摄影的TIO_2既具有光化学氧化的活性，又具有NAD的酶促还原。它可以通过该催化剂与NAD再生实现循环反应。2。从观测到的光强度的曲线中，在具有含有TIO_2颗粒的气体 - 液体固体分散体的平方色谱柱中，从观察到的光强度的曲线中评估了有效的吸收系数。从小的环形光反应器中NADH（NAD的降低）的测得的光氧化速率获得量子效率。在环形反应器（10厘米o。d。，4.6厘米i。d。）和高度（= 1m）的高度（= 1m）中，测量了NADH的光氧化速率，实验结果与使用有效吸收系数从模型中计算得很好的实验结果一致。

项目成果

Setsuji TONE, Masao KAWASHIMA, Teruyoshi MORIKAWA and Masahito TAYA: "Characteristics of Gas-Liquid-Solid Reactor with Photocatalytic Reactions" Symp. Ser. No. 22 of Chem. Eng. "Topics and Researches on Bubble and Slurry Bubbling Reactors", ed. by SCEJ. 1

Setsuji TONE、Masao KAWASHIMA、Teruyoshi MORIKAWA 和 Masahito TAYA：“具有光催化反应的气-液-固反应器的特性”Symp。

Setsuji, TONE, Masao, KAWAHIMA, Teruyoshi, MORIKAWA, Toshiyuki, KITA and Masahito TAYA: "Analysis of Gas-Liquid-Solid Reactions in an Annular Photochemical Reactor with Light Absorption" Kagaku Kogaku Ronbunshu. Vol. 17. 402-409 (1991)

Setsuji、TONE、Masao、KAWAHIMA、Teruyoshi、MORIKAWA、Toshiyuki、KITA 和 Masahito TAYA：“具有光吸收的环形光化学反应器中气-液-固反应的分析”Kagaku Kogaku Ronbunshu。

Setsuji TONE: "Applications of Gas-Liquid-Solid Reactors with Photo-chemical Reactions" Chemical Engineering,. Vol. 35. 48-53 (1990)

Setsuji TONE：“气-液-固反应器与光化学反应的应用”化学工程，。

Masahito Taya: "Construction of bifunctional catalyst by immobilizeation of enzyme on semiconductor powders" Chemistry Express. 4. 653-656 (1989)

Masahito Taya：“通过在半导体粉末上固定酶构建双功能催化剂”化学快报。

東稔 節治: "光反応を伴う気・液・固三相系のリアクタ-特性" 化学工学シンポジウムシリ-ズ22 「気泡塔・懸濁気泡塔の現状と動向」 化学工学会編. 136-140 (1990)

东节司：《涉及光反应的气液固三相反应器的特性》化学工程研讨会系列22《泡罩塔和悬浮泡罩塔的现状和趋势》日本化学工程师学会编136-140（。 1990)