Photocatalytic oxidation (PCO) is a technology that has been suggested as an alternative energy efficient method to improve Indoor Air Quality (IAQ) in several indoor air spaces. In the past few years, several studies have been made to assess the feasibility of PCO for the removal of VOCs that are commonly found in most indoor environments like homes and schools. There are however little or no studies on other indoor environments like hospitals. In hospital operating rooms, anesthetic gases such as isoflurane are known to be one of the main pollutants found in the air. The present work therefore studies the efficiency of PCO to remove isoflurane by studying the influence of three operating parameters on the degradation process. The operating parameters investigated were air velocity, light intensity and initial concentration. The experiments were carried out in a closed-loop multi pass reactor. The kinetic degradation curve of isoflurane showed two distinct phases; the first phase where the degradation occurred slowly and a second phase where the degradation accelerated and fit a first order decay model. Two quantitative indicators, the induction time and the single pass removal efficiency were chosen to compare the influence of the parameters on the first and second phases respectively. Increasing the air velocity led to longer induction periods and lower single pass removal efficiencies. Induction period was decreased when light intensity was increased and removal efficiencies increased by half order. Lower induction periods and better removal efficiencies were obtained at lower concentrations. Although some intermediates were identified, their low concentrations mean they may not pose significant negative effects to human health.

光催化氧化（PCO）是一项已提出的技术，可作为一种节能的替代方法来改善多个室内空气空间中的室内空气质量（IAQ）。在过去的几年中，已经进行了几项研究，以评估PCO去除挥发性有机化合物的可行性，而挥发性有机化合物在大多数室内环境（如家庭和学校）中普遍存在。然而，很少或没有关于医院等其他室内环境的研究。在医院的手术室中，麻醉气体（例如异氟烷）是空气中发现的主要污染物之一。因此，本工作通过研究三个操作参数对降解过程的影响，研究了PCO去除异氟烷的效率。研究的操作参数是风速，光强度和初始浓度。实验在闭环多程反应器中进行。异氟烷的动力学降解曲线显示出两个不同的相。退化缓慢发生的第一阶段和退化加速并符合一阶衰减模型的第二阶段。选择两个定量指标，感应时间和单程去除效率，以分别比较参数对第一和第二阶段的影响。空气速度的增加导致更长的诱导时间和更低的单程去除效率。当增加光强度并且去除效率提高一半时，诱导期缩短。在较低的浓度下可获得较低的诱导期和较好的去除效率。尽管确定了一些中间体，