World number three Trump rattled off five frames to send 2005 world champion Murphy packing and now has the chance to bounce back from his 9-5 Welsh Open final heartbreak against Joe Perry just seven days ago.
Trump survived scares against Liang Wenbo and Zhou Yuelong to make it to Sunday's final but said he had his sights set on the £100,000 best-of-19 frames showdown against Selt, who beat Ding Junhui 6-5 in the other semi-final.
"It was very cool to be out there in the one-table set up," Trump told wst.tv.
"There was a big crowd and a special atmosphere. It's exciting to get to the final of an event in a new territory. I missed a lot of balls tonight and I am nowhere near my best but throughout the tournament I have been making important clearances. Shaun started well and he was 2-1 up when he missed a black, I pinched that frame otherwise I could have been 3-1 down.
"Getting to finals is good but it's never nice being stood clapping your opponent at the end. When I got here I was super tired and mentally it was very draining. I can take an immense sense of pride from getting to the final again. This season hasn't gone well and I knew I needed to dig in over the last two events to get into the Tour Championship."
Trump took the opening frame with a break of 79 but Murphy hit back with 99 and 91 to go ahead in the game. Tump levelled and made Murphy pay for more costly mistakes as he raced clear at 4-2. He pushed on with an advantage of 58 to lead 5-2, and, when Murphy rattled the far jaw attempting a red to the centre, Trump turned on the style to kill the contest and book a place in his 35th ranking event final.
The 2019 world champion said: "I had some shocking performances early this week but managed to survive. My will to win is second to none, I had to give it absolutely everything to get through those games."