Search for: All records

This paper presents the rationale and current progress of my Ph.D. dissertation: "design interactions between robot surfaces and human designers." This specific topic serves as a case study trying to explore the question of how to design an interactive and partially intelligent space. We proposed the concept of "space agent" defined as "interactive and intelligent environments perceived by users as human agents" based on communication theories. Built upon this concept, we proposed a design framework for interactive environments. Then we further explored literatures about what space agent could contribute to human users specifically for the case of interior designers' work space. Research questions and research designs are introduced in this paper, followed by the discussions of experiments design. 

Abstract The complex structure of the catalytic active phase, and surface‐gas reaction networks have hindered understanding of the oxidative coupling of methane (OCM) reaction mechanism by supported Na₂WO₄/SiO₂catalysts. The present study demonstrates, with the aid of in situ Raman spectroscopy and chemical probe (H₂‐TPR, TAP and steady‐state kinetics) experiments, that the long speculated crystalline Na₂WO₄active phase is unstable and melts under OCM reaction conditions, partially transforming to thermally stable surface Na‐WO_xsites. Kinetic analysis via temporal analysis of products (TAP) and steady‐state OCM reaction studies demonstrate that (i) surface Na‐WO_xsites are responsible for selectively activating CH₄to C₂H_xand over‐oxidizing CH_yto CO and (ii) molten Na₂WO₄phase is mainly responsible for over‐oxidation of CH₄to CO₂and also assists in oxidative dehydrogenation of C₂H₆to C₂H₄. These new insights reveal the nature of catalytic active sites and resolve the OCM reaction mechanism over supported Na₂WO₄/SiO₂catalysts.