Adventus at a Glance: Adventus Energy LLC is a knowledge-based energy and chemicals consulting firm that was established to provide objective and independent advisory services to the gasification, energy, power generation, clean coal technology, chemicals, refining, natural gas processing industries and government entities. With the support of a network of technical advisors, eminent individuals and associates in the industry, we can provide unsurpassed insight and solutions to the energy and chemicals industry. No problem is too small for us to consider.