De Lyle Bloomquist
Analyst
Thank you, Mickey, and good morning. I'll begin with the financial overview for the first quarter of 2024. Following that, I'll discuss recent company actions before handing over to Marcus for additional details on the business segments and our capital structure and liquidity.
Following Marcus' comments, I'll come back to share additional details on our initiatives and guidance for 2024. This will include updates on the suspension of the operations at our Temiscaming HPC plant in the sales process for the paperboard and high-yield pulp businesses. We will then open the floor for questions.
Let's turn our attention to Slide 4, where we'll discuss our first quarter performance for 2024. The results exceeded expectations with an adjusted EBITDA of $52 million, a $1 million increase from the same period last year. In the high -- I'm sorry, in the high-purity cellulose segment, EBIT rose by $6 million, driven by higher prices for Cellulose specialties along with a decreased cost for key inputs and logistics as well as improved productivity.
This increase was somewhat moderated by reduced sales volumes, lower prices for commodity products and the absence of energy benefits that we anticipate we will realize later this year.
Conversely, the Paperboard segment experienced a $1 million decrease in EBITDA, primarily due to lower sales prices, although this was somewhat mitigated by decreased cost for purchase kraft pulp.
High-yield Pulp business saw an $8 million decrease in EBITDA, largely due to lower sales prices, though this was partially offset by increases in sales volumes and reduced logistics expenses.
Additionally, Corporate expenses improved by $4 million, largely driven by a favorable foreign exchange impact. In summary, the overall solid performance was underpinned by strong results in our core cellulose specialty segment and cost reductions across the enterprise, which more than offset the softness in Paperboard and High-Yield Pulp segments.
In terms of cash flow, there was a strategic use of cash to build finished goods inventories in anticipation of the planned annual maintenance outage at our Jesup plant. In subsequent developments, we have announced the indefinite suspension of operations at our Temiscaming HPC plant. The suspension is expected to provide marginal positive EBITDA benefits and enhance our consolidated free cash flow in 2024.
I will share more about the financial implications of this decision after Marcus' comments. This month, we also announced a significant transaction, selling the rights to our softwood lumber duty refund for $39 million. This sale not only bolsters our financial flexibility, but also aligns with our strategic goal to reduce our debt by $70 million in 2024.
Considering these updates and our strong performance in the first quarter, I am pleased to reaffirm our full year EBITDA guidance of $180 million to $200 million and to raise our full year adjusted free cash flow guidance to $80 million to $100 million.
With that, I'd like to pass the meeting over to Marcus to walk us through the financials for the quarter. Marcus?