Abstract: An exhaust gas receiver that is connectable to an internal combustion engine for receiving exhaust gases from the engine, the exhaust gas receiver comprising a receiver chamber, at least one exhaust inlet, at least one exhaust outlet, and a reducing agent duct, at least a portion of the reducing agent duct being arranged inside the receiver chamber for heating the reducing agent before the reducing agent is mixed with the exhaust gases. The invention also concerns an internal combustion engine and a method for selective catalytic reduction.

Abstract: A zirconium-based mixed oxide or zirconium-based mixed hydroxide which is capable of (a) at least 90% v/v conversion of naphthalene at atmospheric pressure at a temperature in the range 600-700° C. using a residence time of about 0.3 seconds, and/or (b) providing an initial heat of adsorption of ammonia of greater than 150 kJ/mol when measured by ammonia flowing gas microcalorimetry. Also, a method for purifying gas produced from the gasification of carbonaceous materials, comprising the step of bringing the gas into contact with such mixed oxides or mixed hydroxides.