Reducing sulfur and nitrogen emissions in shipping economically

Reducing fuel emissions by optimizing speed on shipping routes

Fuel consumption and emissions on a shipping route are typically a cubic function of speed. Given a shipping route consisting of a sequence of ports with a time window for the start of service, substantial savings can be achieved by optimizing the speed of each leg. This problem is cast as a non-linear continuous program, which can be solved by a non-linear programming solver. We propose an alt...

Trends in Global Emissions: Carbon, Sulfur, and Nitrogen

Cost-effectiveness of reducing sulfur emissions from ships.

We model cost-effectiveness of control strategies for reducing SO2 emissions from U.S. foreign commerce ships traveling in existing European or hypothetical U.S. West Coast SO(x) Emission Control Areas (SECAs) under international maritime regulations. Variation among marginal costs of control for individual ships choosing between fuel-switching and aftertreatment reveals cost-saving potential o...

Sulfur dioxide emissions in Iran and environmental impacts of sulfur recovery plant in Tabriz Oil Refinery

Background: Combustion of fossil fuels contributes to sulfur dioxide (SO2) emissions. To deal with this issue, the government of Iran has appointed the oil refineries to upgrade their installations and produce high quality fuels. Thus, this study investigated the status of SO2 emissions in Iran and the capability of advanced technologies to control SO2 emissions. Methods: The status of SO2 em...

GHG emissions from international shipping and aviation

International shipping accounts for about 2 percent of annual global CO2 emissions. Aviation annually contributes to approximately 3.5 percent of the total human climate change effects, taking into account that several emissions from planes contribute. The emissions occur outside national control, and need broad international cooperation to be curbed. Voluntary agreements and technical standard...