Clarence A Johnson

Title: Innovations by Clarence A. Johnson

Introduction

Clarence A. Johnson is a notable inventor based in Princeton, NJ (US). He has made significant contributions to the field of coal gasification, holding a total of 3 patents. His work focuses on improving the efficiency and safety of coal processing methods.

Latest Patents

Johnson's latest patents include a "Process for the multiple zone gasification of coal." This innovative method allows for the controlled slow heating of particulate coal in a gasifier with multiple zones. The process minimizes the decrease in coal particle density and reduces issues such as particle swelling and friability. Additionally, it addresses the carryover of fines and deposition of tars in the product gas conduit. The heating rate of the particulate coal in the gasifier zones typically ranges from about 10°F to 200°F per minute. Another significant patent is the "Coal drying and passivation process." This method involves drying low rank coals, such as subbituminous or lignites, which contain more than 10 wt. % moisture. The coal is then passivated against moisture reabsorption by coating it with a heavy liquid hydrocarbon material, preventing autogenous heating and spontaneous ignition during transportation or storage.

Career Highlights

Johnson is currently associated with Hydrocarbon Research, Inc., where he continues to develop innovative solutions in the field of coal processing. His expertise has led to advancements that enhance the safety and efficiency of coal utilization.

Collaborations

Throughout his career, Johnson has collaborated with notable colleagues, including William Volk and John Shen. Their combined efforts have contributed to the development of groundbreaking technologies in the energy sector.

Conclusion

Clarence A. Johnson's work in coal gasification and processing has made a significant impact on the industry. His innovative patents reflect a commitment to improving energy efficiency and safety in coal utilization.