 AD stands for ANNO DOMINI which refers to Christ's birth. BC is before Christ. CE stands for 'Common Era' and is a recent term. It is used in place of AD.   BCD stand â¦ s for 'Before Common Day' and is used instead of BC, however it is more commonly represented as BCE, 'Before Common Era'.
Chemical engineers typically do the following: 1  Conduct research to develop new and improved manufacturing processes. 2  Develop safety procedures for those working with dangerous chemicals. 3  Develop processes for separating components of liquids and gases, or for generating electrical currents, by using controlled chemical processes.
Our chemical engineering curriculum prepares you to meet the challenges of the chemical industry, research and development, and environmental and/or energy regulations. Typically, chemical engineers: Optimize the economics and energy efficiency of chemical processes in the petroleum and specialty chemicals industries.