Phase change materials (PCMs) have the potential to provide valuable thermal energy storage. However, PCMs are not widely used due to challenges with their implementation. Factors including leakage, high-cost materials, energy-intensive processes, and the presence of potentially toxic chemicals are barriers to the widespread use of PCMs. A promising approach is to use biomass derived materials for the encapsulation of PCMs, providing inexpensive and non-toxic wall materials. Spray drying processes are more favorable for large scale production than other encapsulation methods. Many studies have used cellulose or cellulose derivatives to encapsulate PCMs, however most of these methods pose significant challenges to scale up, either due to costs, toxicity, or difficulties with the method itself. This work aims to develop a process for the microencapsulation of a PCM using biomass derived wall materials and a spray drying process. This involved the isolation of cellulose from wheat straw, size reduction of cellulose, design and testing of a laboratory scale spray dryer, and spray drying of a cellulose stabilized PCM emulsion. It was found that cellulose could effectively be isolated from wheat straw, and several methods for size reduction were promising for encapsulation. In addition, two spray dryer prototypes were developed, which were able to successfully spray dry during testing, however they had low solids recovery. Successful microencapsulation of the PCM in cellulose by spray drying appears to have occurred based on SEM analysis. Further work is needed to improve cellulose size reduction, emulsion formation for encapsulation, spray dryer performance and operation, as well as rigorous evaluation of the produced microcapsules.