SAN ANTONIO–(BUSINESS WIRE)– #NOx–Southwest Research Institute (SwRI) is helping a client develop a simple post-refinery treatment process that reduces exhaust emissions from diesel engines by overcoming the soot/nitrogen oxides (NOx) reduction trade-off that has plagued engine researchers for decades. The result is a modified fuel that potentially could replace today’s ultra-low sulfur diesel, biodiesel and other renewable diesel fuels. The modified fuel reduces soot production without increasing