A reactor (50; 110) for accommodating high contaminant liquid feedstocks (56; 138) comprising: a reactor vessel (52; 112) having an inlet (54; 146) for introducing a liquid feedstock (56; 138) containing contaminants into an interior of the reactor vessel (52; 112), the interior being defined by an interior wall (62; 148) of the reactor vessel (52; 112); a liquid distributor assembly (64; 152) located below and in fluid communication with the inlet (54; 146) for discharging the liquid feedstock (56; 138) radially outward towards the interior walls (62; 148) of the reactor vessel; a basket (68; 114) located within the reactor vessel interior and below the liquid distributor assembly (64; 152), the basket (64; 114) having a fluid permeable outer wall (72; 116) and a first fluid permeable inner wall (74; 118) that is spaced radially inward from the outer wall (72; 116) to define a first annular interior space (76; 120) of the basket (68; 114), the first annular interior space (76; 120) of the basket containing a particulate material (78; 126) for removing contaminants from the liquid feedstock (56; 138), the outer wall (72; 116) of the basket (68; 114) being spaced radially inward from the interior wall (62; 148) of the reactor vessel (52; 112) to define an annular flow space (80; 156) between the outer wall (72; 116) of the basket (68; 114) and the interior wall (62; 148) of the reactor vessel (52; 112), and wherein liquid feedstock (56; 138) introduced into the reactor vessel (52; 112) from the liquid distributor assembly (64; 152) flow through the annular flow space (80; 156) and radially inward through the first annular interior space (76; 120) of the basket (68; 114) and through the particulate material (78; 126) to facilitate removal of contaminants from the liquid feedstock (56; 138) to form a purified feedstock (92; 158), the first fluid permeable inner wall (74; 118) forming a purified feedstock outlet of the basket (68; 114) and defining a central conduit (94; 132) that extends along the length of the basket (68; 114), the central conduit (94; 132) having a conduit outlet (96; 136) for discharging the purified feedstock (92; 158); and a catalyst (104; 128) that is located within the reactor vessel (52; 112) and in fluid communication with the purified feedstock outlet of the basket for contacting the purified feedstock (92; 158) to form a desired product. a reactor vessel (52; 112) having an inlet (54; 146) for introducing a liquid feedstock (56; 138) containing contaminants into an interior of the reactor vessel (52; 112), the interior being defined by an interior wall (62; 148) of the reactor vessel (52; 112); a liquid distributor assembly (64; 152) located below and in fluid communication with the inlet (54; 146) for discharging the liquid feedstock (56; 138) radially outward towards the interior walls (62; 148) of the reactor vessel; a basket (68; 114) located within the reactor vessel interior and below the liquid distributor assembly (64; 152), the basket (64; 114) having a fluid permeable outer wall (72; 116) and a first fluid permeable inner wall (74; 118) that is spaced radially inward from the outer wall (72; 116) to define a first annular interior space (76; 120) of the basket (68; 114), the first annular interior space (76; 120) of the basket containing a particulate material (78; 126) for removing contaminants from the liquid feedstock (56; 138), the outer wall (72; 116) of the basket (68; 114) being spaced radially inward from the interior wall (62; 148) of the reactor vessel (52; 112) to define an annular flow space (80; 156) between the outer wall (72; 116) of the basket (68; 114) and the interior wall (62; 148) of the reactor vessel (52; 112), and wherein liquid feedstock (56; 138) introduced into the reactor vessel (52; 112) from the liquid distributor assembly (64; 152) flow through the annular flow space (80; 156) and radially inward through the first annular interior space (76; 120) of the basket (68; 114) and through the particulate material (78; 126) to facilitate removal of contaminants from the liquid feedstock (56; 138) to form a purified feedstock (92; 158), the first fluid permeable inner wall (74; 118) forming a purified feedstock outlet of the basket (68; 114) and defining a central conduit (94; 132) that extends along the length of the basket (68; 114), the central conduit (94; 132) having a conduit outlet (96; 136) for discharging the purified feedstock (92; 158); and a catalyst (104; 128) that is located within the reactor vessel (52; 112) and in fluid communication with the purified feedstock outlet of the basket for contacting the purified feedstock (92; 158) to form a desired product.